asme b31.3 interpretations volume 24

ASME B31.3 INTERPRETATIONS

ASME B31.3INTERPRETATIONS VOLUME 24

Replies to Technical InquiriesApril 30, 2012 through December 16, 2013

GENERAL INFORMATION

It has been agreed to publish interpretations issued by the B31 Committee concerning B31.3as part of the update service to the Code. The interpretations have been assigned numbers inchronological order. Each interpretation applies to the Edition stated in the interpretation, or ifnone is stated, to the Edition in effect on the date of issuance of the interpretation. Subsequentrevisions to the Code may have superseded the reply.

These replies are taken verbatim from the original letters, except for a few typographical andeditorial corrections made for the purpose of improved clarity. In some instances, a review ofthe interpretation revealed a need for corrections of a technical nature. In these cases, a revisedreply bearing the original interpretation number with the suffix R is presented. In the case wherean interpretation is corrected by errata, the original interpretation number with the suffix E is used.

ASME procedures provide for reconsideration of these interpretations when or if additionalinformation is available which the inquirer believes might affect the interpretation. Further,persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcom-mittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,”“certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the B31 Committee, refer toAppendix Z.

NUMERICAL AND SUBJECT INDEXES

Numerical and Subject Indexes have been prepared to assist the user in locating interpretationsby location or by subject matter in the Code. They cover interpretations issued from Volume 1up to and including the present volume, and will be updated with each volume.

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B31.3Subject Interpretation File No.

Chapter IX, High Pressure Piping (B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-13 12-1782Fig. 323.2.2B, Design Minimum Temperature According to ASME B31T

(B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-04 12-243Para. 302.3.6(a), Limits of Calculated Stresses Due to Occasional Loads

(B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-24 13-1331Para. 304.7.2, Pressure Design (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-09 12-1504Para. 307.1.2, Qualification of Valve Pressure Design (B31.3-2010) . . . . . . . . . . . . . 24-18 13-509Para. 322.6.3, Relief Devices (B31.3-2012). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-16 13-266Para. 323.3.5, Acceptance Criteria (B31.3-2012). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-26 13-1508Para. 328.5.4 and Fig. 328.5.4D, Welded Branch Connection (B31.3-2010) . . . . . . . 24-15 13-76Para. 328.5.4, Welded Branch Connections (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . 24-10 12-1584Paras. 328.5.4(d) and (e), Use of a Branch Connection Where the

Abutting Branch Pipe Is Not Welded to the Run (B31.3-2012) . . . . . . . . . . . . . . . 24-23 13-789Para. 340.4(a), Owner’s Inspectors (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-05 12-499Para. 341.3.1(a), NDE After PWHT for P-Nos. 3, 4, and 5 Materials

(B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-30 11-1769Para. 341.3.3, Defective Components and Workmanship (B31.3-1996

Edition Through B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-29 13-709Para. 341.4.1(b), Sample Examinations (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . 24-08 12-1071Para. 341.4.1(b)(1), Prequalification of Welds by Random Examination

(B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-22 13-786Paras. 344.2.1 and 342.1, Visual Examination (B31.3-2012). . . . . . . . . . . . . . . . . . . . . 24-21 13-710Para. 345, Pneumatic Leak Testing (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-11 12-1610Para. 345.2.2(a), Examination During Leak Testing (B31.3-1996 Edition Through

B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-07 12-56, 12-666Para. 345.2.3(b), Flanged Joints (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-19 13-620Para. 345.2.3(c), Closure Welds (B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-25 13-1499Para. K328.2.1(b), Welding Qualifications (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . 24-06 12-623Para. K328.2.1(d), Welding Qualifications (B31.3-2010). . . . . . . . . . . . . . . . . . . . . . . . 24-17 13-474Random Examination (B31.3-2012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-20 13-704Table 302.3.5, Weld Joint Strength Reduction Factor, W (B31.3-2010). . . . . . . . . . . . 24-12 12-1728Table 323.2.2, Low Temperature Toughness Tests for Metals (B31.3-2008) . . . . . . . 24-27 13-1548Table 323.2.2, Notes (3) and (5), Impact Testing (B31.3-2010) . . . . . . . . . . . . . . . . . . 24-01 12-57Table 323.3.1, Impact Testing for Metals (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . 24-14 12-2057Table 323.3.1, Impact Testing Requirements for Metals (B31.3-2008) . . . . . . . . . . . . 24-28 13-1549Table 341.3.2, Acceptance Criteria (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-03 12-241Table 341.3.2 and Paras. 341.4.1, 341.4.2, and M341.4, Radiography for

Fillet Welds (B31.3-2010) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-02 12-102

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Interpretation 24-01

Subject: Table 323.2.2, Notes (3) and (5), Impact Testing (B31.3-2010)

Date Issued: April 30, 2012

File: 12-57

Question: In accordance with ASME B31.3-2010, if a material meets the requirements ofTable 323.2.2, Note (3) exception to impact testing requirements, does it matter what size specimenis obtainable as described in Note (5)?

Reply: No.


Subject: Table 341.3.2 and Paras. 341.4.1, 341.4.2, and M341.4, Radiography for Fillet Welds(B31.3-2010)


File: 12-102

Question: In accordance with ASME B31.3-2010, is it a requirement to perform radiographyon fillet welds?

Reply: No.


Subject: Table 341.3.2, Acceptance Criteria (B31.3-2010)


File: 12-241

Question: In accordance with ASME B31.3, if indications are detected in the base metal or aweld not required to be examined, are the indications required to be evaluated?

Reply: The Code does not specifically address this issue. However, the Introduction states thatthe owner is responsible for imposing requirements supplementary to those of the Code ifnecessary to assure safe piping for the proposed installation. Also see para. 300(c)(4).

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Subject: Fig. 323.2.2B, Design Minimum Temperature According to ASME B31T (B31.3-2010)


File: 12-243

Question (1): In accordance with ASME B31.3-2010, may Fig. 323.2.2B be used for impact-testedmaterials in the same manner as described in the ASME BPV Code rules?

Reply (1): No. See interpretation 20-13R.

Question (2): In accordance with ASME B31.3-2010, is the use of ASME B31T, StandardToughness Requirements for Piping, mandatory?

Reply (2): No.

Question (3): In accordance with ASME B31.3-2010, does Fig. 323.2.2B apply to UNS S31803(22Cr duplex)?

Reply (3): No.


Subject: Para. 340.4(a), Owner’s Inspectors (B31.3-2010)


File: 12-499

Background: An EPC (Engineering, Procurement, and Construction) contractor has beenawarded a contract to engineer, procure, construct, and install a pressure piping system.

Question (1): Does ASME B31.3 allow an EPC contractor to act as the owner’s inspector untilthe piping system is complete and ready to be turned over to the owner?

Reply (1): No.

Question (2): Does ASME B31.3 allow the owner to designate in writing an employee of theEPC contractor to act as the owner’s inspector until the piping system is complete and ready tobe turned over to the owner?

Reply (2): No.

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Subject: Para. K328.2.1(b), Welding Qualifications (B31.3-2010)


File: 12-623

Question (1): In accordance with ASME B31.3-2010, is a separate qualification of the weldingprocedure required for each combination of base material specification(s) forming a joint inChapter IX, High Pressure Piping, even if the material type or grade remains the same?

Reply (1): Yes; see para. K328.2.1(b).

Question (2): In accordance with ASME B31.3-2010, if a welded joint comprised of two differentmaterial specifications with the same type or grade in Chapter IX, High Pressure Piping, isqualified, does the welding procedure also qualify welding of each individual base material toitself?

Reply (2): No; see para. K328.2.1(b).

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Subject: Para. 345.2.2(a), Examination During Leak Testing (B31.3-1996 Edition ThroughB31.3-2010)

Date Issued: October 5, 2012

File: 12-56, 12-666

Question (1): In accordance with ASME B31.3-1996 Edition through ASME B31.3-2010, para.345.2.2(a), must examination for leaks be performed in accordance with the visual examinationmethod in para. 344.2?

Reply (1): No.

Question (2): Other than sensitive leak testing, do ASME B31.3-1996 Edition throughASME B31.3-2010, define leak testing examination requirements?

Reply (2): No.

Question (3): In accordance with ASME B31.3-1996 Edition through ASME B31.3-2010, para.345.2.2(a), must personnel performing the examination for leaks be qualified for visual examina-tion per paras. 342.1 or 344.2?

Reply (3): No.

Question (4): In accordance with ASME B31.3-1996 Edition through ASME B31.3-2010, para.345.2.2(a), must leak testing be performed in accordance with a written procedure for visualexamination?

Reply (4): No.

Question (5): Other than sensitive leak testing, do ASME B31.3-1996 Edition throughASME B31.3-2010 require compliance with the requirements of ASME BPV Code Section V,Articles 9 or 10 for leak testing?

Reply (5): No.

Question (6): In accordance with ASME B31.3-1996 Edition through ASME B31.3-2010, duringa hydrostatic leak test, if the examiner is satisfied that the requirements of para. 345.2.2(a) aremet, is a 100% visual examination (i.e., a visual examination of 360 deg of the pipe or jointsurface) of each joint or connection required?

Reply (6): No.


Subject: Para. 341.4.1(b), Sample Examinations (B31.3-2010)


File: 12-1071

Question: If one welder makes the tack welds in a circumferential butt weld and another welderwelds the root pass and remainder of the weld, is it required that the welder who made the tackwelds be represented in the sample examinations required by para. 341.4.1(b) or the progressivesampling of para. 341.3.4?

Reply: No.

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Subject: Para. 304.7.2, Pressure Design (B31.3-2010)


File: 12-1504

Question: In accordance with ASME B31.3-2010, para. 307.1.2, Unlisted Valves, if valve pressure–temperature ratings are established by the method set forth in ASME B16.34, Appendix B, is itnecessary to qualify the pressure design in accordance with ASME B31.3, para. 304.7.2?

Reply: No.


Subject: Para. 328.5.4, Welded Branch Connections (B31.3-2010)


File: 12-1584

Question: In ASME B31.3-2010, for the installation of instrument tap type branch connections,do the weld types specified in ASME Section VIII, Division 1, UW-15(b) (i.e., welds that requireno strength calculations) and corresponding acceptable welding types shown in UW-16, whichinclude not-fully-penetrated branch connection groove welds, comply with the acceptable weldingdetails shown in ASME B31.3, para. 328.5.4?

Reply: No; however, see para. 300(c)(3).


Subject: Para. 345, Pneumatic Leak Testing (B31.3-2010)


File: 12-1610

Question: In accordance with ASME B31.3-2010, para. 345.5.4(a), with or without the owner’sapproval, does the Code permit pneumatic testing in excess of 1.33 times the design pressure?


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Subject: Table 302.3.5, Weld Joint Strength Reduction Factor, W (B31.3-2010)


File: 12-1728

Question (1): In accordance with ASME B31.3-2010, Table 302.3.5, is the weld strength reductionfactor, W, for P91 alloy steel material (CSEF subcritical) at 950°F equal to 0.5?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2010, Table 302.3.5, should the weld strengthreduction factor, W, for P91 alloy steel material be the same value as in ASME B31.1-2010?

Reply (2): The ASME B31.3 Committee is unable to provide the information you have requested.The Committee does not respond to requests for rationale. Code rules reflect not only technicaldata and safety criteria, but also the collective experience of the Committee members. Interdepen-dence of rules in various Chapters also plays a part in any given requirement.

If you believe, however, that a particular Code rule or rules may benefit from considerationof new or additional data and approaches, the Committee welcomes your desire to contribute.We invite you to submit pertinent material for transmittal to the Code Section Committee involved.

If you desire, an invitation can be extended for you to attend a meeting of the Committee atwhich the material will be discussed. We appreciate your interest.

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Subject: Chapter IX, High Pressure Piping (B31.3-2012)


File: 12-1782

Question (1): Does ASME B31.3-2012 require compliance with Chapter IX, High Pressure Piping,under any circumstance other than when such compliance is specified by the owner?

Reply (1): No; see para. K300(a).

Question (2): Does ASME B31.3-2012 require that piping designed for a pressure in excess ofthat allowed by ASME B16.5, Class 2500 rating for the specified design temperature and materialgroup be designed in accordance with Chapter IX if the piping system is not designated by theowner as being in High Pressure Fluid Service?

Reply (2): No; see para. K300(a).


Subject: Table 323.3.1, Impact Testing for Metals (B31.3-2010)


File: 12-2057

Question (1): Do rows 4 through 7 of Table 323.3.1 of ASME B31.3-2010 apply to welds usedin the manufacture of piping components?

Reply (1): No.

Question (2): Do rows 1 through 3 of Table 323.3.1 of ASME B31.3-2010 apply to welds usedin the manufacture of piping components?

Reply (2): Yes.


Subject: Para. 328.5.4 and Fig. 328.5.4D, Welded Branch Connection (B31.3-2010)


File: 13-76

Question: Does ASME B31.3-2010 permit the use of a complete (full) encirclement split-tee asa branch connection, where a branch pipe is butt welded to the branch opening of the split-tee,if the requirements of paras. 303 and 304.7.2 are met?

Reply: Yes. See also paras. 300(c)(3) and 300(c)(4).


Subject: Para. 322.6.3, Relief Devices (B31.3-2012)


File: 13-266

Question: Does ASME B31.3 require that all relief devices that meet para. 322.6.3 but not API 526be evaluated as unlisted components?

Reply: Yes; see para. 302.2.3.

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Subject: Para. K328.2.1(d), Welding Qualifications (B31.3-2010)


File: 13-474

Question (1): In accordance with ASME B31.3-2010, para. K328.2.1(d), if transverse tensile testingis required for a full penetration groove weld test coupon for Welding Procedure Qualification inaccordance with the ASME BPV Code, Section IX, shall yield strength be determined on thetransverse tensile test coupon?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2010, para. K328.2.1(d), shall all-weld-metaltensile testing be conducted and the yield strength of the weld be determined if transversetensile testing is required for a full penetration groove weld test coupon for Welding ProcedureQualification in accordance with the ASME BPV Code, Section IX?

Reply (2): No, unless the filler metal is not yet incorporated into Section IX (see para. K328.3.1).


Subject: Para. 307.1.2, Qualification of Valve Pressure Design (B31.3-2010)


File: 13-509

Question: Does para. 307.1.2 of ASME B31.3-2010 permit a valve manufactured from a materialnot listed in ASME B16.34 to have the pressure–temperature rating established in accordancewith the method set forth in ASME B16.34?

Reply: Yes.


Subject: Para. 345.2.3(b), Flanged Joints (B31.3-2010)


File: 13-620

Question (1): In accordance with ASME B31.3-2010, do components listed in Table 326.1 needto be leak tested in accordance with para. 345?

Reply (1): We believe your question can be answered by previous interpretation 23-14.

Question (2): Does the phrase “previously been tested” in para. 345.2.3(b) refer to leak testingin accordance with the requirements of ASME B31.3?

Reply (2): Yes.


Subject: Random Examination (B31.3-2012)


File: 13-704

Question: Does ASME B31.3-2012 prohibit commencement of random examination prior tocompletion of all welds in a designated lot?

Reply: No.

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Subject: Paras. 344.2.1 and 342.1, Visual Examination (B31.3-2012)


File: 13-710

Question (1): Does ASME B31.3-2012 have any qualification requirements for visual examinersperforming Code-required examinations?

Reply (1): Yes. See paras. 342.1 and 344.2.

Question (2): Does ASME B31.3-2012 require individuals that check the fit and alignment ofweld joints during fabrication to be qualified for visual examination as described in paras. 342.1and 344.2?

Reply (2): No.


Subject: Para. 341.4.1(b)(1), Prequalification of Welds by Random Examination (B31.3-2012)


File: 13-786

Question: When ASME B31.3-2012, para. 341.4.1(b)(1) requires random examination of 5% ofcircumferential girth or miter groove welds by radiography or ultrasonic examination for NormalFluid Service, must all welds in the lot be completed prior to the completion of the requiredexaminations on the selected welds?

Reply: The Code does not address this issue. See previous interpretations 2-12 and 24-20.


Subject: Paras. 328.5.4(d) and (e), Use of a Branch Connection Where the Abutting Branch PipeIs Not Welded to the Run (B31.3-2012)


File: 13-789

Question: Under the rules of ASME B31.3-2012, may a branch connection be added to a pipingrun using branch attachment details other than specified by para. 328.5.4(d), which require fullypenetrated groove welds to the run pipe, or para. 328.5.4(e)?

Reply: No, unless qualified in accordance with paras. 300(c)(3), 300(c)(4), and 304.7.2.

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Subject: Para. 302.3.6(a), Limits of Calculated Stresses Due to Occasional Loads (B31.3-2012)


File: 13-1331

Question (1): Is the final paragraph in para. 302.3.6(a) applicable to castings only?

Reply (1): Yes.

Question (2): Does ASME B31.3 permit the occasional stress of austenitic steel piping to riseabove yield?

Reply (2): Yes; however, see para. 302.3.2(e).


Subject: Para. 345.2.3(c), Closure Welds (B31.3-2012)


File: 13-1499

Question: If a pipe is bent in accordance with para. 306.2, can it be installed using closurewelds without being leak tested in accordance with para. 345?

Reply: No.


Subject: Para. 323.3.5, Acceptance Criteria (B31.3-2012)


File: 13-1508

Question (1): In accordance with ASME B31.3-2012, para. 323.3.5(a), do the acceptance criteriafor minimum energy requirements apply to carbon and low alloy steels having specified minimumtensile strengths equal to or greater than 656 MPa (95 ksi) or for high alloy steels (P-Nos. 6, 7,and 8)?

Reply (1): No. See para. 323.3.5(b) for acceptance criteria for these materials.

Question (2): In accordance with ASME B31.3-2012, para. 323.3.5(c), are the acceptance criteriafor weld impact test requirements applicable for clad-pipe to clad-pipe welds?

Reply (2): No. See paras. 323.3.5(a) and 323.3.5(b).

Question (3): In accordance with ASME B31.3-2012, para. 323.3.5(c), when dissimilar base metals(e.g., P1 and P8) are joined by welding and the weld metal has a tensile strength most closelymatching that of the P8 base material, shall the acceptance criteria for impact tests conform tothe lateral expansion requirements of para. 323.3.5(b)?

Reply (3): Yes.

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Subject: Table 323.2.2, Low Temperature Toughness Tests for Metals (B31.3-2008)


File: 13-1548

Question: In accordance with ASME B31.3-2008, when ASTM B423 N08825 base metal is weldedby SFA-5.14 ERNiCrMo-3 N06625 filler metal, do the rules of Table 323.2.2, Box A-6(b) requirethat testing in accordance with Box B-6 be performed?

Reply: Yes.


Subject: Table 323.3.1, Impact Testing Requirements for Metals (B31.3-2008)


File: 13-1549

Question: In accordance with ASME B31.3-2008, Table 323.3.1, box A-5, is the qualified thicknessrange T/2 to T + 6 mm (1⁄4 in.)?

Reply: Yes. Also see previous Interpretation 4-17.


Subject: Para. 341.3.3, Defective Components and Workmanship (B31.3-1996 Edition ThroughB31.3-2012)

Date Issued: December 12, 2013

File: 13-709

Question: Is it the intent of ASME B31.3-1996 Edition through ASME B31.3-2012, para. 341.3.3to allow replacement welds for rejected welds to be examined by any nondestructive (NDE)method that is allowed for the original welds, as it is for high pressure piping system welds inK341.3.3, rather than requiring the same NDE method as used on the original defective welds?

Reply: Yes.


Subject: Para. 341.3.1(a), NDE After PWHT for P-Nos. 3, 4, and 5 Materials (B31.3-2010)


File: 11-1769

Question: A piping assembly made of P-No. 5 material consisting of several welds is furnaceheat treated and radiographed. One of those welds is defective and repaired. The assembly isthen heat treated again. Is it the intent of para. 341.3.1(a) that all of the welds in that pipingassembly be radiographed again?

Reply: No.

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Replies to Technical InquiriesApril 23, 2010 through September 27, 2011

GENERAL INFORMATION







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Para. 301.3.2, Fluid Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-06 10-540Para. 304.1, Wall Thickness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-16 11-445Para. 304.3.3, Reinforcement of Welded Branch Connections . . . . . . . . . . . . . . . . . . 23-18 11-847Para. 304.7.2, Application of a Detailed Stress Analysis Performed Using a

Numerical Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-07 10-542Para. 304.7.2, Unlisted Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-03 10-535Para. 319.4.3, Basic Assumptions and Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . 23-04 10-537Para. 323.2.2, Reference to Table A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-08 10-702Para. 323.2.2, Reference to Table A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-12 10-1503Para. 323.2.2 and Fig. 323.2.2B, Lower Temperature Limits for Listed

Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-13R 11-448Para. 331, Review of Interpretations 20-39 and 21-46 . . . . . . . . . . . . . . . . . . . . . . . . . 21-46R 11-16Para. 345, Leak Testing of Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-14 11-17Para. 345.1(b), Required Leak Test and Para. 304.7.2, Unlisted

Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-05 10-538Para. 345.1(d), Pressure Test Exemption for Vents and Drains . . . . . . . . . . . . . . . . . 23-20 11-1539Paras. 345.2.4 and 345.2.5, External Differential Pressure. . . . . . . . . . . . . . . . . . . . . . 23-17 11-578Para. 345.5.2, Pressure Relief Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-11 10-1502Para. 345.5.5, Pressure Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-15 11-444Table 302.3.3C, Casting Quality Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-10 10-1501Table 323.2.2, Impact Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-13 10-1560Table 323.2.2, Stress Ratio Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-01 10-533Table 341.3.2, Partial Joint Penetration Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-02 10-534Tables A-1 and A-3, Allowable Stress Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-19 11-1075Table A-1B, Electric Fusion Welded Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-09 10-1500

I-2



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Interpretation 20-13R

Subject: ASME B31.3-2002 through B31.3-2010, Para. 323.2.2 and Fig. 323.2.2B, Lower TemperatureLimits for Listed Materials


File: 11-448

Question (1): Does ASME B31.3, Fig. 323.2.2B, provide a basis for the use of impact-testedcarbon steels at a minimum design metal temperature (MDMT) colder than the impact testtemperature, provided the stress ratio defined in Fig. 323.2.2B is less than 1 but greater than 0.3,and the MDMT is not colder than −48°C (−55°F)?

Reply (1): Yes.

Question (2): Does ASME B31.3, Fig. 323.2.2B, provide a basis for the use of impact-testedcarbon steels at a minimum design metal temperature (MDMT) colder than the impact testtemperature, provided the stress ratio defined in Fig. 323.2.2B is less than 1 but greater than 0.3,and the MDMT is colder than −48°C (−55°F)?

Reply (2): No.

Question (3): Does ASME B31.3, Table 323.2.2, Note (3), provide a basis for the use of impact-tested carbon steels at a minimum design metal temperature (MDMT) colder than the impacttest temperature, provided the stress ratio defined in Fig. 323.2.2B is equal to or less than 0.3when the MDMT is colder than −48°C (−55°F)?

Reply (3): Yes.

Question (4): Does ASME B31.3 permit Fig. 323.2.2B to be used to provide a basis for the useof impact-tested duplex stainless steels, UNS S31803, impact tested at −51°C (−60°F), in the samemanner as described in question (1)?

Reply (4): No.

Interpretation 21-46R

Subject: ASME B31.3-2008, Para. 331, Review of Interpretations 20-39 and 21-46


File: 11-16

Question (1): Does ASME B31.3 require both circumferential and longitudinal welds made bythe pipe manufacturer of API 5L double submerged arc welded (DSAW) pipe to be heat treatedin accordance with para. 331?

Reply (1): No.

Question (2): Does ASME B31.3 require both circumferential and longitudinal welds made bythe piping fabricator on API 5L double submerged arc welded (DSAW) marked pipe to be heattreated in accordance with para. 331?

Reply (2): Yes.

I-3



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Subject: ASME B31.3-2008, Table 323.2.2, Stress Ratio Figure


File: 10-533

Question (1): Does the Code provide rules for the use of duplex stainless steel material(UNS S31803) with a lower design temperature than −60°F (−51°C) under certain conditions withlimitations?

Reply (1): Yes; see para. 323.2.2(c).

Question (2): Are the provisions described in Note (3) of Table 323.2.2 also applicable for duplexstainless steel material?

Reply (2): Yes.


Subject: ASME B31.3-2008, Table 341.3.2, Partial Joint Penetration Welds


File: 10-534

Question: Does para. 300(c)(3) allow partial joint penetration welds if a more rigorous analysisaddressing the design, construction, examination, inspection, and testing details is documentedin the engineering design and accepted by the owner?

Reply: Yes. Note that requirements for Code rules that are not applicable as written to suchconstruction, such as examination and fatigue design, need to be addressed. See also Interpretation16-12.


Subject: ASME B31.3-2008, Para. 304.7.2, Unlisted Components


File: 10-535

Question: Does para. 304.7.2(c) address product form and material type when proof testing inaccordance with ASME B16.9; MSS SP-97; or Section VIII, Division 1, UG-101?

Reply: No.


Subject: ASME B31.3-2008, Para. 319.4.3, Basic Assumptions and Requirements


File: 10-537

Question: Does the Code address how the effects of friction are to be included in earthquakeanalyses?

Reply: No.

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Subject: ASME B31.3-2008, Para. 345.1(b), Required Leak Test and Para. 304.7.2, UnlistedComponents


File: 10-538

Question: Does the Code address alternate methods of proof testing other than those listed inpara. 304.7.2(c)?

Reply: No.


Subject: ASME B31.3-2008, Para. 301.3.2, Fluid Temperature


File: 10-540

Question (1): Does the Code define “fluid temperature” in para. 301.3.2 as “design temperature”?

Reply (1): No.

Question (2): Does the Code permit “fluid temperature” in para. 301.3.2 to be understood as“operating temperature”?

Reply (2): The Code does not define operating temperature.


Subject: ASME B31.3-2008, Para. 304.7.2, Application of a Detailed Stress Analysis PerformedUsing a Numerical Method


File: 10-542

Question: If the designer performs a finite element method evaluation of an unlisted componentthat is accepted by the owner in accordance with para. 300(c)(3), is the designer required toperform the calculation to be substantiated in accordance with para. 304.7.2?

Reply: Yes.

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Subject: ASME B31.3-2008, Para. 323.2.2, Reference to Table A-1


File: 10-702

Question (1): When a welding procedure specification (WPS) has been qualified, includingimpact testing, for an austenitic stainless steel plate that has a design minimum temperaturebelow the minimum temperature given in Table A-1, does the Code require production weldsto be impact tested?

Reply (1): No.

Question (2): When a welding procedure specification (WPS) has been qualified, includingimpact testing, for an austenitic stainless steel plate that has a design minimum temperaturebelow the minimum temperature given in Table A-1, does the Code require the plate materialto be impact tested?

Reply (2): Yes.


Subject: ASME B31.3-2008, Table A-1B, Electric Fusion Welded Tube


File: 10-1500

Question: May the values for longitudinal weld joint quality factor, Ej, listed in Table A-1B, withfurther supplemental radiography per Table 302.3.4, be used to determine design requirements forelectric fusion welded pipe, in which the weld is made with filler metal?

Reply: Yes.


Subject: ASME B31.3-2008, Table 302.3.3C, Casting Quality Factor


File: 10-1501

Question: If a fully machined exterior (250 rms or finer) and pull bored interior (125 rms orfiner) surfaced centrifugal cast tube section is fully liquid penetrant examined in accordance withASTM E165 and judged acceptable per Table 1 of MSS SP-53 using ASTM E125 as a referencefor surface flaws per Note (2) of ASME B31.3, Table 302.3.3C over its entire exterior surface andup to one diameter on the interior surface of each end, does the Code permit the use of anincreased casting quality factor, Ec, of 0.90?

Reply: No. To increase the casting quality factor, all surfaces shall be examined; see Note (2)(b)of Table 302.3.3C.

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Subject: ASME B31.3-2008, Para. 345.5.2, Pressure Relief Device


File: 10-1502

Question: Does ASME B31.3-2008 require that the pressure relief device described in para. 345.5.2comply with para. 322.6.3(a)?

Reply: No, unless the pressure relief device is a permanent component of the piping systembeing tested.


Subject: ASME B31.3-2008, Para. 323.2.2 Reference to Table A-1


File: 10-1503

Question (1): Does ASME B31.3-2008 reference ASME B31E, Standard for the Seismic Design andRetrofit of Above-Ground Piping Systems, as an alternative to the requirements in para. 302.3.6?

Reply (1): No.

Question (2): Does ASME B31.3-2008 allow an alternative to the requirements in para. 302.3.6for seismic design of above-ground piping?

Reply (2): Yes; see para. 300(c)(3).


Subject: ASME B31.3-2008, Table 323.2.2, Impact Testing


File: 10-1560

Question (1): Do Table 323.2.2 boxes A-3(b) and A-4(b) exclude HAZ impact testing?

Reply (1): No.

Question (2): Does the code permit the weld deposit impact testing exemptions of Table 323.2.2box A-3(b) for joining ASTM A333, A334, A350, A352, and A420?

Reply (2): No.


Subject: ASME B31.3-2008, Para. 345, Leak Testing of Piping Components


File: 11-17

Question: Does ASME B31.3-2008 require listed piping components, including valves, to beleak tested in accordance with para. 345?

Reply: No. See para. 326.3.

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Subject: ASME B31.3-2008, Para. 345.5.5, Pressure Testing


File: 11-444

Question: Does ASME B31.3 require that a pneumatic leak test be maintained at the test pressurefor at least 10 min?

Reply: Yes. See para. 345.2.2(a).


Subject: ASME B31.3-2008, Para. 304.1, Wall Thickness


File: 11-445

Question: Does ASME B31.3-2008 have an equation for pressure design thickness with straightpipe where t equals or exceeds one-sixth of the outside diameter of the pipe (D/6)?

Reply: No, except as provided in Chapter IX.


Subject: ASME B31.3-2008, Paras. 345.2.4 and 345.2.5, External Differential Pressure


File: 11-578

Question (1): In para. 345.2.4, Externally Pressured Piping, does the term “external differentialpressure” mean maximum differential pressure between any coincident internal pressure andexternal pressure?

Reply (1): Yes. See para. 301.2.1(d).

Question (2): Does para. 345.2.5, Jacketed Piping, require separate leak tests for both internalline and jacket?

Reply (2): Yes.


Subject: ASME B31.3-2010, Para. 304.3.3, Reinforcement of Welded Branch Connections

Date Issued: September 27, 2011

File: 11-847

Question: In accordance with ASME B31.3-2010, do the equations for A3 and A4 in para. 304.3.3(c)apply to branch connections other than the configuration shown in Fig. 304.3.3?

Reply: No; however, see para. 304.3.1.

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Subject: ASME B31.3-2010, Tables A-1 and A-3, Allowable Stress Values


File: 11-1075

Question (1): Does ASME B31.3-2010 require the use of allowable stresses shown in Table A-1?

Reply (1): Yes.

Question (2): Does ASME B31.3-2010 require the use of allowable stresses shown in Table A-3?

Reply (2): No. See Appendix A, General Note (c).

Question (3): Based on ASME B31.3-2010, para. 302.3.2, Bases for Design Stresses, footnote 2,may the designer use the stress values in ASME BPV Code Section II, Part D, Tables 2A, 2B, and3 for stresses at temperatures below the creep range instead of the allowable stresses inASME B31.3-2010, Tables A-1, A-2, and A-3, respectively?

Reply (3): No.

Question (4): Based on ASME B31.3-2010, para. 302.3.2, footnote 2, may the designer use thestress values in ASME BPV Code Section II, Part D, Tables 1A and 1B for stresses at temperaturesin the creep range instead of the allowable stresses in ASME B31.3-2010, Tables A-1, A-2, andA-3, respectively?

Reply (4): No.


Subject: ASME B31.3-2010, Para. 345.1(d), Pressure Test Exemption for Vents and Drains


File: 11-1539

Question (1): For Normal Fluid Service or Category D Fluid Service, does ASME B31.3-2010,para. 345.1(d), exempt leak testing for all drain or vent lines open to the atmosphere?

Reply (1): Yes, unless otherwise specified in the engineering design.

Question (2): Does the statement in ASME B31.3-2010, para. 345.1(d), of “such as vents ordrains downstream of the last shutoff valve” mean that this is the only configuration open tothe atmosphere exempt from leak testing by this paragraph?

Reply (2): No.

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ASME B31.3 — CUMULATIVE INDEX — INTERPRETATIONS VOLS. 1–23

NUMERICAL INDEXCode references are based on ASME B31.3-1990 or later editions. References in brackets are to previous editionsand addenda.

Reference Interpretation

Introduction 1-31-61-713-0420-08

300 7-108-1719-11

300(b) 1-261-324-085-038-0910-1113-14

300(c) [300(e)] 1-31-61-73-23-44-106-03R (Vol. 7)7-058-3013-0216-1218-0919-3119-4820-0320-2020-38

300(c)(3) 22-32300.1 7-10

8-179-0612-2021-0721-32

300.1.1 1-471-522-263-14-196-018-019-0217-0122-34

(a)


Fig. 300.1.1 1-81-192-267-108-1722-39

300.1.3 [300.1.4] 1-81-161-191-263-215-09

300.1.3(d) 10-0521-22

300.2Category D Design 22-06

TemperatureCategory D Fluid 4-13

Service5-036-0119-34

Category M Fluid 1-40Service

1-736-018-099-02

flammable 21-25notch-sensitive 2-22owner 2-30piping components 3-2

8-0114-0317-2321-2422-41

piping system 1-309-06

severe cyclic 5-12conditions

8-09Table 300.4 20-23301 5-11301.1 20-40301.2 2-3

7-01301.2.1 2-29

13-15


301.3 2-317-0722-06

301.3.1 10-0221-47

301.3.2 4-1123-06

301.5.3 4-07301.7.2 3-4301.10 22-04302 1-32

19-03302.2 1-50302.2.1 16-18302.2.2 17-11

19-02302.2.3 19-19302.2.4 [302.2.3] 1-3

1-322-143-44-117-017-048-0414-0917-1220-0320-2220-5121-4522-0422-37

302.2.5 13-15302.3 20-25302.3.2 1-18

1-382-163-138-2511-0516-0419-3719-38

Table 302.3.3C 23-10302.3.4 2-20

17-14Table 302.3.4 1-42



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Table 302.3.4 (Cont’d)1-782-203-1120-3421-0621-3722-10

302.3.5 1-201-502-142-152-243-44-104-126-03R (Vol. 7)6-077-047-058-1615-1516-1117-0417-1818-1620-0221-3422-07

Table 302.3.5 16-1022-36

302.3.6 1-502-152-162-1719-1820-0220-4920-50

302.4 1-20303 6-05304.1 23-16304.1.1 1-42

1-541-7013-0715-0615-1016-1421-3822-21

304.1.2 1-421-571-681-702-1110-2021-1322-04

(b)


304.2 15-14304.2.1 21-13304.2.2 18-06304.2.3 1-22

5-11Fig. 304.2.3 1-22304.3 1-21

1-465-016-09

304.3.1 19-33304.3.2 4-05304.3.3 4-03

7-028-068-3711-1012-0514-1015-0517-2621-3923-18

Fig. 304.3.3 8-37304.3.4 1-21

1-371-551-752-27

Fig. 304.3.4 1-70304.3.5 12-13304.3.5(e) 22-20304.5 3-4

9-0710-1419-12

304.5.1 8-1820-12

304.5.1(b) 9-10304.7.2 1-51

3-24-055-055-116-0910-0710-1110-1812-0913-0213-0313-0513-1119-2920-2620-3721-0221-3423-0323-07


304.7.4 1-16305.1 22-43305.2 3-8

3-9305.2.1 1-38305.2.3 6-01

7-0321-29

306.4 12-16306.4.2 11-03308.2.1 5-12308.2.4 5-12311.2.4 6-02

6-05311.2.5 10-04312 9-07314 20-48314.2.1 2-22Table 314.2.1 8-33

11-16315.2 3-6315.3 3-6317.2 1-17318 8-13318.2.2 19-45319.1.1 20-48319.2.1 2-17

20-45319.2.3 7-04

7-0512-0618-13

319.3.1 19-4021-09

319.3.1(b) 15-2421-16

319.3.2 21-26319.3.5 4-10319.3.6 1-6

1-71-552-245-1513-0522-20

Table 319.3.6 9-01319.4.1 1-33

13-14319.4.3 23-04319.4.4 1-71

2-72-24

319.7 1-167-05

321.1.1 6-07321.1.4 1-49

19-3621-41

322.3 17-24



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322.6.1 10-1012-18

322.6.3 1-322-212-297-0112-0414-0922-30

323.1 19-28323.1.1 8-19

17-09R (Vol. 18)19-41

323.1.2 1-111-151-482-16-068-078-1911-0315-0417-0117-0819-27

323.2 3-9323.2.1 1-13323.2.2 15-12

15-2519-0719-2119-3519-3919-4720-1520-3123-0823-12

323.2.2(d) 22-2622-44

323.2.2(f) 22-23Fig. 323.2.2 14-08

20-13R (Vol. 23)20-1521-2821-40

Table 323.2.2 1-12[Table 323.2.1]

1-481-651-762-193-84-014-1514-1215-1115-1617-09R (Vol. 18)

(c)


Table 323.2.2 [Table 323.2.1] (Cont’d)18-1220-3121-0121-4322-0323-0123-13

323.2.4 6-06323.3 1-76

5-1320-1422-01

Table 323.3.1 1-12[Table 323.3.2]

1-764-175-195-218-2910-0211-1215-2320-1020-3121-18

323.3.2 11-12323.3.4 8-30Table 323.3.4 22-02323.3.5 2-9Table 323.3.5 5-14323.4 15-03323.4.2 10-01

10-19Table 326.1 1-11

1-512-38-078-3419-1422-05

328 7-0212-1220-39

328.1 12-07328.2 [327.5] 1-66

11-0914-1320-19

Fig. 328.2(b) 22-32328.2.1 [327.5.1, 327.5.2] 1-76

4-178-2919-2220-1920-43

328.2.2 20-19328.2.2(g) 14-05328.2.2(i) 19-26


328.2.3 15-1918-08

328.4 13-01328.4.2 and Fig. 328.4.2 12-10328.4.3 14-04Fig. 328.4.4 8-28

9-08328.5 [327.4] 5-09328.5.1 [327.4.1] 5-17

22-2522-35

328.5.2 [327.4.2] 5-1216-0619-20

Fig. 328.5.2 [Fig. 327.4.2] 1-285-126-026-058-2715-0819-1620-01

328.5.3 20-05328.5.4 [327.4.4] 1-59

1-742-104-034-147-088-1310-0413-1121-0222-22

Fig. 328.5.4 [Fig. 327.4.4] 1-591-744-034-167-08

328.6 2-18330 8-21330.1 8-23Table 330.1.1 9-05331 8-12

20-3921-46R (Vol. 23)

331.1.1 8-089-0514-0119-15

Table 331.1.1 1-69[Table 331.3.1]

2-25-068-249-0312-1414-1617-01



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Table 331.1.1 [Table 331.3.1] (Cont’d)20-4421-1221-19

331.1.2 8-05331.1.3 [331.3.6] 1-39

1-594-065-069-0311-0614-0115-1817-1317-2118-0219-2422-19

331.1.4 [331.1.2] 5-08331.1.6 [331.3.4] 5-08

16-09331.1.7 [331.3.2] 1-78

8-22331.2 18-04331.2.2 [331.1.1] 1-39

1-78331.3.4 8-05331.3.7 8-05332.1 8-03

19-04332.2 [329.1] 1-23

1-534-028-20

332.2.2 16-08332.4 [329.3, 330.2] 2-2

19-04332.4.2 11-03

15-17335.1.1 15-07

17-25335.2 2-5335.2.3 17-20

21-14Fig. 335.3.3(a) 20-36340.2 [336.1.2] 1-26340.3 [336.3] 1-10

10-03340.4 [336.2] 1-31

17-1520-33

341 10-1615-1319-4921-17

341.1.4.1 21-20341.2 [336.1.1, 336.1.3] 1-10

1-261-272-2810-03

(d)


341.3.1 [336.5] 1-642-419-1521-48

341.3.2 8-3221-4422-40

Fig. 341.3.2 [Fig. 327.4.1] 5-0913-16

Table 341.3.2 14-0214-0714-1516-0717-0317-2218-0720-1620-2020-3423-02

[Table 327.4.1A] 1-11-91-141-412-85-045-135-165-175-185-206-047-06

[Table 341.3.2A] 8-328-389-0411-0811-1412-2213-16

341.3.3 14-1422-33

341.3.4 [336.5, 336.5.4] 1-622-252-323-53-1410-0910-1211-0211-0413-1216-0116-0216-0518-01


341.4 [336.5] 1-241-453-125-2011-0121-2322-17

341.4.1 [336.5.1] 1-101-261-271-602-122-283-73-124-125-108-028-108-2610-0310-1711-1111-1411-1518-1419-0519-4220-0920-3421-04

341.4.2 8-38341.4.3 8-10

20-09341.5 8-38341.5.1 [336.6.1] 1-5

3-1220-34

342 15-21342.1 [336.4.1] 2-28

21-05343 [336.4.1] 2-28344 [336.4] 5-09

16-1318-1120-42

344.1 13-12344.2 [336.4.2] 2-28

8-108-2611-1115-2118-17

344.2.1 19-17344.2.2 21-20344.5 [336.4.5] 1-10

1-602-12



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



344.5.1 20-3420-4122-08

344.6 [336.4.6] 1-60344.6.2 10-17344.7 [336.4.7] 2-28

3-1412-0119-17

344.7.1 11-1121-20

345 [337] 1-21-722-313-38-3116-0317-3019-2319-3019-4920-1721-1123-14

345.1 [337.1] 1-41-304-046-088-1512-2120-2421-3622-14

345.1(b) 23-05345.1(d) 23-20345.2.2 8-31

20-4618-1020-4721-42

345.2.3 20-0720-1120-2420-27

345.2.3(a) 22-1522-18

345.2.3(c) 21-1022-16

345.2.3(i) 17-2820-37

345.2.4 [337.4.3] 1-3523-17

345.2.5 19-44345.2.6 [337.1] 1-2

5-2219-2320-06

(e)


345.3 [337.3] 2-63-105-0212-03

345.3.1 20-2822-0922-27

345.3.4 22-14345.4 8-04

19-2522-11

345.4.1 12-19345.4.2 [337.4.1] 1-35

1-611-632-234-049-0913-1318-0319-1020-46

345.4.3 [337.4.2] 1-63345.5 [337.4.4] 1-35

1-436-0811-0713-0619-3222-1123-15

345.5.1 22-14345.5.2 11-19

23-11345.5.4 12-02

20-46345.7 [337.5.2] 1-36345.8 [337.6] 1-25

3-1017-0219-0620-18

345.9 [337.5.1] 4-095-076-088-1510-1512-0112-2115-0217-0517-1018-1520-18

345.9.1 20-0620-43

A302.2.3 20-30A302.2.4 21-33A304 8-14


A304.1.1 14-1714-18

A304.5.1 1-67A304.7.2 13-08A305 11-17A314 8-33A322.6 17-29A323.4.2 10-06

11-1821-3021-31

Table A326.1 20-30A327.2.4 7-09A328 21-15A328.2(a) 10-08A328.2.1 8-14

18-05A328.2.5 17-06A328.5 8-14

10-0813-08

K300 20-09K300(a) 17-16K303 20-21K304.1.2 11-21

14-11K304.8 22-04K314.2 17-19K315 7-07K322.3 7-07K323.1.2 19-09K323.1.5 21-03Table K323.3.1 20-41

21-18K323.3.5 21-27Table K326.1 20-21K328.2.1(a) 17-27Fig. K328.5.4 8-37K341.4.2 20-09K346.2(b) 21-03M305.1 12-15M307.2 8-35M313 21-21M314.2.2 20-36M322.3 2-13

3-6M323.1.3 3-7M326 2-13M335.3.3 20-36M335.4 [M335.5, M335.6] 3-6M341.4 [M336.5] 1-24

1-4520-09

M341.4.1 [M336.5.1] 2-283-7

M345 20-47M345.1 6-08MA306.5 9-02MA313 21-21



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MA323.4 9-0219-08

MA323.4.2 8-35Appendix A Notes (no 2-20

equivalent) [(14)]Note (17) 4-18Note (20) [(30)] 1-77Note (57) [(2)] 1-58Appendix ATable A-1 [Table 1] 1-13

1-181-291-381-481-772-13-83-93-134-124-136-016-067-038-118-188-258-348-3611-1312-0915-0119-4319-46

(f)


Table A-1 [Table 1] (Cont’d)20-2920-3221-2822-1222-2822-4223-19

Table A-1B [Table 1] 1-782-204-187-0323-09

Appendix B 19-13Table B-1 22-38Appendix D 1-6

1-71-341-461-551-561-712-72-244-165-015-156-0612-0812-1112-1713-0518-18


Appendix E 1-44[Appendix K]

5-1019-20

Appendix F [F323.2] 1-29Appendix F, F323 20-20Appendix F, FA323.4 20-30Appendix G 5-12Appendix H 8-06

11-10Appendix J 1-28

1-541-755-04

Appendix M 6-018-0920-23

Appendix P 22-07Appendix V 17-17Appendix X, X3.1.3 12-23Appendix X, X3.2.2 13-09Appendix X, X302.2.3 15-22Case 137 3-1Case 141 1-51Case 181 22-13

22-2922-31



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SUBJECT INDEX

Interpre-Subject tation

Acceptance Criteriapressure tests 1-2weld 1-1

1-91-141-412-85-095-135-175-185-206-047-068-3212-2213-1614-0214-07

Allowable Loads 14-06

Allowable Stresses 4-12bases for 1-18

3-138-118-2510-1315-01

for ASTM A182 22-28for ASTM A312 1-29for ASTM A351 11-13for ASTM A387 8-25for ASTM A464 8-11for ASTM A570 1-38for ASTM A587 1-13for ASTM A671 1-48for austenitic stainless 3-13

steelsfor unlisted alloy steel 19-09

pipe

Allowable Stress Range 22-0723-19

Alterations of Piping 13-04

Alternative Tests (see Leak Tests)

Authorized Inspector (see Owner’sInspector)

(g)


Bellows 13-09

Bending 4-028-0315-1716-08

Bendscorrugated 1-23miter (see Miter Bends)reduction of outside 8-20

diameter

Bolting Materials 4-1517-2020-1221-14

Bonding Qualification Testhot gas welded 8-14minimum burst pressure 7-09

8-14procedure specifications 10-08

for plastic piping21-15

requirements 18-05solvent cement 8-14

Bondsheat fusion 8-14hot gas welded 8-14test assembly 7-09

Branch Connectionscouplings 19-33extruded outlets 1-37

2-276-09

flexibility analysis 9-01integrally reinforced fitting 4-05

11-10projection into run pipe 8-28

9-03reinforcement 8-06

8-3712-0512-1314-1015-0521-39

weld requirements 2-10


Branch Connections (Cont’d)weld requirements (Cont’d)

4-034-147-027-0810-0413-1117-2622-2223-18

Brazed Jointsfor flammable service 1-17

Buckles 1-231-53

Casting Quality Factor 23-10

Cast Ironsspecific requirements 10-01

Category D Design 22-06Temperature

Category D Fluid Servicealternative pressure test for 1-36limitations 4-13

5-0321-47

radiographic examination 8-3821-23

Category M Fluid Serviceclarification of term 1-73

9-0220-23

double contained piping 8-35fittings 20-36leak test 6-08liquid oxygen 8-09piping flexibility 21-21requirements 8-35

9-0212-15

tubing size limitations 2-13“very small quantity” 1-40

Code Case 22-1322-2922-31

Code CoverageB31.3 versus B31.4 1-47

7-10



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Code Coverage (Cont’d)B31.3 versus B31.9 21-32buried piping 21-07cryogenic piping 21-22fired heaters 15-09general hydrocarbon 6-01

serviceinline sensing devices 8-01

21-24intent 16-12later editions 19-01new and replacement 5-22

piping12-2119-49

offshore platform 8-17oil heating system 4-19radioactive fluids 12-20synfuel plant piping 1-52

2-26tobacco plant piping 3-1

Components (see also Fittings, Flanges,Standard Components, Unlisted, andValves)

certification 1-263-75-1013-10

defining 17-2320-11

design conditions 2-3fabricated or flared flaps 11-03

12-16inline sensing devices 8-01

21-24listed 20-25metric size 19-29referenced standards 1-44

5-1022-05

Compressorsinternal piping 1-8

Corrugated Bends 1-23

Cyclic Loading 5-1217-04

Design (see also Pressure Design)additional design 12-13

considerationscalculations 20-26

21-13conditions 2-3for stainless bellows 12-23Lame theory 1-57minimum temperature 10-02qualification 20-38

20-40

Displacement Strain 20-45

(h)


Displacement Stress 2-142-2412-0618-1321-09

Earthquake (see Seismic)

Effective Date 22-24

Empty Systemtransportation 9-06

Examinationacceptance criteria 16-07extent of 1-24

5-1811-0121-0421-23

in-process 3-1411-15

liquid penetrant (see LiquidPenetrant Examination)

personnel 21-05postweld heat treatment 21-48progressive (see Progressive

Examination)radiographic (see

Radiographic Examination)random 1-27

1-451-622-122-324-1211-15

records 11-1121-20

required 1-241-606-0411-1411-1515-1315-2118-1421-1722-17

severe cyclic conditions 10-1711-14

spot 1-62types 16-13

18-11ultrasonic (see Ultrasonic

Examination)visual (see Visual

Examination)

Exclusionsfor compressors and 1-8

internal pipingfor interconnecting piping 1-19

21-22listed in scope 10-05


Expansion Joints 1-1612-2313-09

Extruded Outletpressure design of 1-21

1-70tees considered as 1-55

Extruded Welded Tee 5-01

Fatigue 18-09

Fillet Weldinternal, slip-on flange 8-27pressure containing 8-13size 1-74use 10-04

23-09

FittingsB16.9 1-7

5-0119-1420-21

conforming to two grades 8-18flared, flareless, or 3-6

compression types12-16

MSS SP-75 1-11

Flame Arrester 22-39

Flammable Service 1-1721-25

Flangesassembly 2-5design 1-67

3-49-07

general 9-10long welding neck 4-05slip-on 5-12

8-27use of aluminum 1-51use of raised and flat face 9-07

metallic

Flexibility Analysisbranch connections 9-01exemptions from 1-33modulus of elasticity 21-26qualification 13-05

13-14thermal expansion data 15-24

21-16



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Flexibility Characteristiceffect of branch to run 1-56

diametersfor a tee 1-55

1-565-01

for components not listed 1-55in Appendix D

2-24

Flexibility Factorsbasis for 1-56for B16.9 tee 1-7

12-0812-17

for fabricated intersections 1-64-165-15

for pressure piping 13-05components

for welded elbows 1-6

Fluid Servicedefinition 19-34

20-23general hydrocarbon 6-01requirements, metallic 11-16

12-1512-1615-03

requirements, nonmetallic 11-1711-1821-3021-31

responsibility for 4-08categorizing

8-09

Graphitizationtemperature relative to 1-58

onset

Hardnesslimitations on 2-2records 8-22testing 15-20

Heat Fusion Joints 13-08

Heat Treatmentcooling rate 1-69for austenitic stainless steel 1-65for bending and forming 2-2

19-04for carbon steel pipe 21-12for flared laps 11-03for valve parts 8-12

(i)


Heat Treatment (Cont’d)governing thickness 1-39

1-594-065-0611-06

heating rate 1-69local 5-08

8-05monitoring 5-08

8-05postweld 20-39

20-4422-19

requirements 8-088-218-238-249-039-0512-1414-0114-1615-1818-0421-4621-48

SP-1 through SP-5 8-24when radiography is 1-64

required2-4

Hydrostatic Tests (see Leak Tests)

Impact Tests

absorbed energy data 2-9alternative methods 8-30base metal 4-01

11-1218-1220-10

exclusions from 1-765-148-30

HAZ 23-13heat treatment required 5-19in qualifying procedures 8-29of aluminum filler metals 2-19of austenitic stainless steel 1-65of bolting materials 4-15of duplex stainless steel 20-13of heat-affected zone 1-76

5-21of high pressure piping 21-27of weldments 1-12

1-651-76


Impact Tests (Cont’d)5-2119-2121-19

requirements 15-2317-0920-3121-18

temperature limitation 5-148-3014-1219-0719-4321-0121-2821-4322-0122-0222-2622-4423-08

Imperfections (see also AcceptanceCriteria)

concave root surface 1-16-04

determination of 8-32lack of fusion 5-09porosity 1-9

5-135-165-20

slag inclusion 5-20tungsten inclusions 1-9

5-17undercutting 1-14

2-86-04

Installed Piping 1-30

Instrument Piping 7-078-01

Internal Piping, Equipment 1-8

Joint Factorsfor ASTM A234, 2-20

ASTM A312,ASTM A403

for branch connections 8-06for circumferential welds 1-42for longitudinal and spiral 1-78

(helical seam) welds3-118-0617-1420-34



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Jointsalignment 15-07

17-25circumferential bends 5-11exposed during test 2-6

3-1022-09

instrument tubing 7-07special 8-13tapered pipe thread 16-15threaded 11-16

17-1920-48

Lateral Fittings 1-6

Leak Testsacceptance criteria 1-2

15-2216-0323-14

alternative 4-095-076-088-1512-0112-2117-0517-1018-1520-1823-05

as nondestructive 8-31examination

external design pressure 19-44for Category D fluid 1-36

servicefor Category M fluid 20-47

servicefor system designed for 0 2-31

psiisolation of test pump 1-2leakage 1-4minimum hydrostatic test 2-23

pressure4-04

minor repairs and 1-2additions

negative pressure 22-11of discharge piping 1-72of joints 20-28of newly constructed 1-4

systems5-025-228-1520-24

of piping and vessel 1-63

(j)


Leak Tests (Cont’d)of piping connecting 3-3

equipmentof replacement piping 5-22

12-21painting before test 2-6

3-105-23

personnel qualification 8-31pneumatic test 11-07

11-1912-0213-0619-2319-3019-3220-1722-30

preparation for 2-63-105-025-2312-03

reduced pressure 1-61(hydrostatic test)

2-2313-1320-1722-27

requirements 8-1513-1322-1422-1522-1823-15

sensitive 1-2517-0219-0619-23

system pneumatic leak test 22-30pressure

temperature correction for 1-351-43

test fluid 12-19test pressure 12-04

19-10time 20-46

21-1121-42

vents and drains 23-20welds 20-06

20-0720-3521-1021-36

Lethal Substance 1-73


Limitationson hardness 2-2on imperfections (see

Imperfections)on tubing size 2-13

3-6

Liquid Penetrant Examinationrequirements 11-14

Low Temperature Requirements (seeImpact Tests)

MaterialsAPI 5L 1-78

2-43-93-116-016-06

API 5LX 2-411-05

ASTM A234 2-20ASTM A312 1-29

1-772-20

ASTM A350 19-07ASTM A351 11-13ASTM A387 8-25ASTM A403 1-77

2-20ASTM A487 8-07ASTM A537 2-1ASTM A570 1-38ASTM A587 1-13ASTM A633 1-11ASTM A658 3-8ASTM A671 1-48ASTM B241 2-19ASTM B337 4-18ASTM B464 8-11austenitic stainless steels 3-13bases for design stresses 11-05carbon steel 19-39certification 5-10

8-0213-1021-03

conforming to two grades 8-188-34

listed 17-09R(Vol.18)

17-1122-1222-42

notch sensitive 2-22notes 20-29



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Materials (Cont’d)reidentification 8-19toughness requirements 5-19traceability 19-28unlisted material 11-05

11-2015-0417-0117-0819-27

Mechanical Interlock 19-45

Miter Bendspressure design of 1-22

5-11

Near Straight Sawtooth Runsexplanation of 1-33

Nomenclatured 1-54T 1-28TW 5-04

5-16tn 1-75

Nonmetallic Pipingfluid service requirements 11-17

11-18in Category M Fluid 8-35

Servicejoint requirements 7-09

8-14materials 19-08

20-3021-3021-31

pressure design 14-1714-1821-3322-38

Notch Sensitivematerials 2-22

Occasional Variations 1-3(Pressure/TemperatureAllowances)

2-144-11

loads 1-502-152-162-1719-1820-4920-5021-08

(k)


Ownerresponsibilities 1-26

2-305-2219-11

Owner’s Inspectorqualifications of 1-31

20-33responsibilities of 1-26

Pipealterations of existing pipe 13-04

20-04components 22-41curved and mitered 15-14

segments18-06

elbowless 8-03general 22-43in corroded condition 2-15instrument 17-24made from plate 1-48

8-36of noncircular cross section 3-2pressure design 13-07

14-09pressure testing 9-09spiral (helical seam) 7-03

weldedstraight, under internal 10-20

pressure11-2114-11

types 20-27

Pipe Supportsconfigurations 6-07longitudinal stress effects 7-05materials 19-36

21-41use of plastic 1-49

Plasticlined pipe — use of 8-33

screwed flangespipe supports 1-49

Pneumatic Tests (see Leak Tests)

Positionsqualification of welding 1-66

Postweld Heat Treatment (see HeatTreatment)

Preheat (see Heat Treatment)


Pressure Designallowance 17-12

20-0320-5121-3321-45

for elevated temperatures 3-4in the high pressure range 1-68

17-16of extruded headers 1-21

1-70of flanges and blanks 10-14

13-1519-12

of miter bends 1-21of nonmetallic piping 14-17

components14-18

of pipe 1-421-541-571-681-702-1111-2113-0715-0615-1017-0621-3822-04

of listed components 16-1416-18

of unlisted components 13-0213-0313-0521-34

of valves 8-0413-15

Pressure Ratingcomponents 19-02valve 8-04variations 4-11

20-22

Pressure Relief Devicesacceptable devices 2-21

2-2919-4123-11

and test pressure 11-0711-1912-0414-0918-03



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Pressure Relief Devices (Cont’d)pressure reducing station 19-31requirements 17-29

23-17setting 1-32

7-0112-04

stop valves 10-1012-18

Pressure Surgesloads due to 1-50

Pressure–Temperature 5-05Rating

8-34

Pressure Test (see Leak Test)

Pressure Thickness 22-21

Progressive Examination 1-51-623-510-0910-1211-0211-0413-1216-0116-0216-0518-01

Published Specification 1-15

Radiographic Examination100% 5-09

20-17as supplementary 8-38

examinationdigital radiography 20-42normal fluid service 20-20random radiography 1-27

1-451-622-122-323-12

records 1-10requirements 6-04

11-0111-0512-0322-08

selection of welds for 2-25examination

spot radiography 1-62

(l)


Radiographic Examination (Cont’d)3-12

survey plugs 19-48when PWHT is required 1-64

2-4

Recordscertification 5-10

8-0210-0321-03

for radiographic 1-10examination

of examinations 11-1121-20

of hardness tests 8-22retention of 1-10

Reinforcement, Branchattachment weld 4-03

7-08clarification of terms 1-37

11-10limits of 2-27

9-04

Reinforcement Pad 22-20Thickness

Repairsto welds 2-18

Responsibilitydesigner 10-11rights of owner’s 10-03

inspection17-15

Safeguarding 5-12

Scope (see Code Coverage)

Seismic Loads 4-07effect of friction 23-04

23-12stresses due to 2-17

Severe Cyclic Conditionscyclic loading 5-12large rapid temperature 8-09

changematerial 21-29spiral (helical seam) 7-03

welded pipe

Simplified Flexibility 1-33Analysis

Stainless Steel 22-0322-23


Standard Componentsmanufacturer’s markings 3-7

8-02valves 5-05

8-048-07

Standardscompliance 5-10superseded 1-44

Stresses (see also Allowable Stresses)allowable 19-37

19-3819-4620-32

analysis 23-07displacement stress range 7-04

12-0620-02

due to cold spring 8-16due to occasional loads 2-16due to pressure surges 1-50due to seismic loads 2-17due to sustained loads 15-15

16-0416-1120-02

due to thermal gradients 3-4hydrostatic design 19-13longitudinal 1-20

1-502-152-244-104-126-03R

(Vol.7)

6-077-058-1617-1818-16

ratio figure 23-01reduction factors 16-10

21-34

Stress Intensification Factorsapplication of 1-34

2-246-03R

(Vol.7)

basis for 1-56branch connections 2-7



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Stress Intensification Factors (Cont’d)for B16.9 tees 1-7for fabricated intersections 1-6

5-15for tees 1-46

1-551-715-0112-0812-17

for unlisted components 13-05for welded elbows 1-6

12-11

Temperaturesallowance 17-12

20-03bending 16-08critical 22-36design minimum 10-02

temperature14-0814-1215-1115-1617-0719-35

fluid 23-06large changes 8-09limitations 4-13

5-1415-1215-2519-47

maximum metal 19-40temperature

minimum design metal 20-13Rtemperature (MDMT)

reduction 4-1120-15

variation in elevated 17-17temperature service

verification 16-09

Thermoplastic Pipingneat fusion joints 13-08solvent cemented joints 10-08specific requirements 10-06

Thickness Allowancesgoverning 17-13

17-2118-02

in stress calculations 1-20wall 23-16welding tee 18-18

(m)


Thickness Requirements 20-1720-41

Tubingcategory M fluid service 16-17joints 7-07limitations 2-13

3-6

Ultrasonic Examinationin place of radiography 11-05

20-0920-42

requirements 10-17

Unlistedcomponents 1-6

1-513-64-055-058-0710-1810-0710-1112-0913-0213-0313-0519-0319-1920-2520-3721-3423-03

materials (see Materials)

U-Stamp 22-34

ValvesCategory M Fluid Service 8-35Flanged Ball Valves 16-16materials 8-07

15-26pressure buildup 8-04ratings 5-05

Visual Examinationinternal 8-10

8-2613-16

requirements 2-2810-0313-1618-17

Washers, Use of 2-5


Weldacceptable criteria 17-03

17-2218-0721-4422-40

bevels 12-10closure 22-16configuration 19-16definition 14-03

19-05double submerged arc 21-46R

welded (DSAW)examination of welds 10-15

11-0111-1413-1614-1414-1515-0219-1719-4220-0620-43

fillet size 1-7410-1916-0620-01

final 19-15for branch connections 2-10

4-034-148-3711-1019-25

imperfections (see also 21-02Acceptable Criteria)

joint quality factor 21-0621-37

joint strength reduction 21-35factor

22-37longitudinal 2-20

3-114-18

map 22-1022-25

of valves 12-12partial joint penetration 23-02preparation for welding 13-01

14-04qualification of position 1-66reinforcement 7-08

11-08repair 2-18

21-19sign 22-25size 22-32



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Weld (Cont’d)socket 6-02

6-0510-1915-0816-0619-20

spacing of 7-02tack 22-35types 20-05

20-07

Welder Qualificationby others 15-19

18-08

(n)


Welder Qualification (Cont’d)19-2622-35

requirements 17-27

Welding Procedurequalification of 1-12

1-651-661-764-178-238-2911-0914-05


Welding Procedure (Cont’d)14-1319-22

responsibility 12-0712-12

specification 8-21

8-22

20-14

20-19

20-31

Workmanship 22-33



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INTENTIONALLY LEFT BLANK



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Replies to Technical InquiriesApril 29, 2008 through October 5, 2009

GENERAL INFORMATION







I-1



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B31.3 Versus U-Stamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-34 09-1002Code Case 181, Table 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-13 08-474Code Case 181, Table 1, Use of Alternative Ultrasonic Examination Acceptance

Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-31 09-424Code Case 181, Use of Alternative Ultrasonic Examination Acceptance

Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-29 08-1611Fig. 328.2B and Para. 300.2, Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-32 09-497Flame Arrester. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-39 09-1069Para. 300.2, Definition of Piping Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-41 09-1445Paras. 300.2 and 301.3, Category D Design Temperature . . . . . . . . . . . . . . . . . . . . . . 22-06 08-594Para. 302.2.4, Weld Joint Strength Reduction Factors . . . . . . . . . . . . . . . . . . . . . . . . . 22-37 09-1067Paras. 302.3.5(d) and P302.3.5(d), Allowable Stress Range and Allowable

Operating Stress Limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-07 08-603Para. 304.1.1, Pressure Thickness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-21 08-1245Paras. 304.3.5(e) and 319.3.6, Reinforcement Pad Thickness . . . . . . . . . . . . . . . . . . . 22-20 08-1244Para. 305.1, General Pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-43 09-1489Para. 322.6.3, System Pneumatic Leak Test Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . 22-30 09-247Para. 323.2.2(d), Carbon Steel Materials Without Impact Testing. . . . . . . . . . . . . . . 22-44 09-1605Para. 323.2.2(d), Use of Carbon Steel Materials Without Impact Testing . . . . . . . . 22-26 09-529Para. 323.2.2(f), Stainless Steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-23 08-1438Para. 323.3, Impact Testing Methods and Acceptance Criteria . . . . . . . . . . . . . . . . . 22-01 08-472Para. 328.5.1(b), Weld Map and Welder Sign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-25 08-1440Para. 328.5.1(c), Tack Welding Welder Performance Qualifications . . . . . . . . . . . . . 22-35 09-1003Para. 328.5.4(d), Welded Branch Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-22 08-1246Para. 331.1.3, Postweld Heat Treatment (PWHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-19 08-1243Para. 341.3.3, Defective Components and Workmanship . . . . . . . . . . . . . . . . . . . . . . 22-33 08-473Para. 341.4.1, Examination Normally Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-17 08-597Para. 344.5.1, Radiographic Examination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-08 08-469Paras. 345.1, 345.3.4, and 345.5.1, Leak Testing/Limits of Tested Piping . . . . . . . . 22-14 08-475Para. 345.2.3(a), Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-18 08-1241Paras. 345.2.3(a) and 345.8, Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-15 08-593Para. 345.2.3(c), Closure Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-16 08-596Para. 345.3.1, Hydrotest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-27 08-1669Para. 345.3.1, Joints Exposed and Para. 326.3, Reference Documents . . . . . . . . . . . 22-09 08-471Paras. 345.4 and 345.5, Leak Testing With Negative Pressure . . . . . . . . . . . . . . . . . . 22-11 08-481Pressure Design and Fatigue Cycles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-04 08-478Tables 302.3.4 and A-1B, Longitudinal Weld Joints in Pipes, Tubes, and

Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-10 08-480Table 302.3.5, General Note (b), Critical Temperatures . . . . . . . . . . . . . . . . . . . . . . . . 22-36 09-1066Table 323.2.2, A-4(a) and A-4(b); Paras. 323.2.2(f)(1) and (2); Use of

Austenitic Stainless Steel Materials at Low Temperatures. . . . . . . . . . . . . . . . . . . 22-03 08-477Table 323.3.4, Charpy Impact Test Temperature Reduction . . . . . . . . . . . . . . . . . . . . 22-02 08-476Table 326.1 and Appendix A, Listed Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-05 08-483Table 341.3.2, Acceptance Criteria for Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-40 09-1444Table A-1, Basic Allowable Stresses for Metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-28 08-1608Table A-1, Material 25Cr–20Ni Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-42 09-1446Table A-1, Prohibition of API 5LX Grade Materials at Temperatures Exceeding

400°F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-12 08-595Table B-1, Nonmetallic Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-38 09-1068Weld Repair Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-24 08-1439

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Interpretation: 22-01

Subject: ASME B31.3-2006, Para. 323.3, Impact Testing Methods and Acceptance Criteria


File: 08-472

Question (1): If a welding procedure has been qualified by impact testing for service at atemperature of −46°C in accordance with para. 323.3, but the base material and weld materialwere impact tested at a warmer temperature in accordance with their respective material specifica-tions, may the weld procedure be used for service at temperatures as low as −46°C?

Reply (1): Yes, provided the essential variables, and supplemental essential variables inASME Section IX, are met.

Question (2): Is it required that the same brand and batch number of material, as used in weldprocedure qualification impact testing, be used for production welds?

Reply (2): No.


Subject: ASME B31.3-2006, Table 323.3.4, Charpy Impact Test Temperature Reduction


File: 08-476

Question: To qualify a material to −46°C, should a 5 mm Charpy impact specimen producedfrom a 6.32 mm material thickness be tested at −50.1°C?

Reply: Yes; see para. 323.3.4(b).


Subject: ASME B31.3-2006, Table 323.2.2, A-4(a) and A-4(b); Paras. 323.2.2(f)(1) and (2); Use ofAustenitic Stainless Steel Materials at Low Temperatures


File: 08-477

Question: Does the Code permit austenitic stainless steel materials listed in Table A-1 to beused to the minimum temperatures listed regardless if they are a seamless or welded productform?

Reply: Yes, provided the requirements of Table 323.2.2, A-4(a) and applicable Notes in Table A-1are followed.

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Subject: ASME B31.3-2006, Pressure Design and Fatigue Cycles


File: 08-478

Question (1): Does ASME B31.3 address fatigue due to pressure cycling?

Reply (1): Yes; see paras. 301.10, 302.2.4(d), 304.1.2(b), and K304.8, and also paras. 300(c)(3)and (5).

Question (2): Does para. 302.3.5 address pressure cycling?

Reply (2): No.


Subject: ASME B31.3-2006, Table 326.1 and Appendix A, Listed Components


File: 08-483

Question: Are piping and tube specifications listed in Appendix A considered to be listedcomponents and included as part of Table 326.1?

Reply: Yes. See Note (5) of Table 326.1.


Subject: ASME B31.3-2004, Paras. 300.2 and 301.3, Category D Design Temperature


File: 08-594

Question: Can a fluid service that is nonflammable, nontoxic, and not damaging to humantissues, with a design gage pressure not exceeding 1 035 kPa and a design temperature less than−29°C, be classified as a Category D fluid service?

Reply: No.


Subject: ASME B31.3-2006, Paras. 302.3.5(d) and P302.3.5(d), Allowable Stress Range andAllowable Operating Stress Limit


File: 08-603

Question: Where the value of the stress range factor, f, is permitted to be greater than 1, doesthe Code permit the allowable stress range, SA, for displacement stresses and the allowableoperating stress limit, SoA, to be the greater of

(a) the value computed with f p 1 and without the fm limitations on Sc and Sh(b) the value computed with f > 1 with the fm limitations on Sc and Sh?

Reply: Yes.

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Subject: ASME B31.3-2006, Para. 344.5.1, Radiographic Examination


File: 08-469

Question: Per para. 344.5.1, do the recommended values listed in ASME BPV Code Section V,Article 2, para. T-274 for geometric unsharpness requirements need to be met by the manufacturerunder T-285?

Reply: No.


Subject: ASME B31.3-2006, Para. 345.3.1, Joints Exposed and Para. 326.3, Reference Documents


File: 08-471

Question: Do longitudinal weld joints in pipe meeting a standard listed in para. 326 have tobe exposed during leak testing in accordance with para. 345?

Reply: No; see para. 326.3.


Subject: ASME B31.3-2006, Tables 302.3.4 and A-1B, Longitudinal Weld Joints in Pipes, Tubes,and Fittings


File: 08-480

Question (1): Does the Code permit an EFW pipe produced without filler metal to be upgradedto a weld joint quality factor of 1.00 through radiography?

Reply (1): Yes; see Table 302.3.4.

Question (2): Do weld joint quality factors apply to circumferential welds?

Reply (2): No.


Subject: ASME B31.3-2006, Paras. 345.4 and 345.5, Leak Testing With Negative Pressure


File: 08-481

Question: Does the Code permit externally pressurized piping to be pneumatically tested usingan internal vacuum?

Reply: No; see para. 345.2.4.

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Subject: ASME B31.3-2006, Table A-1, Prohibition of API 5LX Grade Materials at TemperaturesExceeding 400°F


File: 08-595

Question (1): Are API 5L Grades X52 and X56 listed materials?

Reply (1): Yes.

Question (2): Can API 5L Grades X52 and X56 be used above 400°F?

Reply (2): No; see double bars (||) as defined in Note (7) and Note (55) of Table A-1.


Subject: ASME B31.3-2006, Code Case 181, Table 1

Date Issued: May 1, 2008

File: 08-474

Question: For wall thicknesses of less than 25 mm (1 in.), must both the a/t and the � limit inTable 1 be satisfied?

Reply: Yes.


Subject: ASME B31.3-2006, Paras. 345.1, 345.3.4, and 345.5.1, Leak Testing/Limits of Tested Piping


File: 08-475

Question: Is it acceptable for a pneumatic leak test to be conducted with test medium continu-ously added to compensate for known leaks so that the test pressure is maintained?

Reply: Yes, recognizing the additional hazards associated with pneumatic testing. See para.345.5.1.

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Subject: ASME B31.3-2006, Paras. 345.2.3(a) and 345.8, Leak Testing


File: 08-593

Question (1): To comply with section 345, must a piping system be leak tested at the factoryfully assembled, or can individual pipe spools and equipment be tested separately as suggestedin para. 345.2.3(a)?

Reply (1): The Committee believes your question can be answered by previous Interpretation20-25, a copy of which is attached.

Question (2): If a piping system in Normal Fluid Service has passed a hydrostatic leak test inaccordance with para. 345.4, a pneumatic leak test in accordance with para. 345.5, or a hydrostatic–pneumatic leak test in accordance with para. 345.6, is a sensitive leak test in accordance withpara. 345.8 required?

Reply (2): No.


Subject: ASME B31.3-2006, Para. 345.2.3(c), Closure Welds


File: 08-596

Question (1): Does the Code permit a piping system consisting of piping subassemblies and/orcomponents to have more than one closure weld?

Reply (1): Yes.

Question (2): Does the Code permit the leak test requirement of para. 345 to be replaced by100% radiographic or ultrasonic examination?

Reply (2): No.

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Subject: ASME B31.3-2006, Para. 341.4.1, Examination Normally Required


File: 08-597

Question (1): Are the longitudinal welds made in accordance with material specifications listedin Table A-1 or Table 326.1 required to be examined per para. 341.4.1(b)(1) when intersecting acircumferential weld that is being examined?

Reply (1): No; reference Table 341.3.2, Note (3).

Question (2): Are piping components fabricated with longitudinal welds made in accordancewith Chapter V that are intersected by a circumferential weld during fabrication, assembly, orerection that is examined, required to also be examined per para. 341.4.1(b)(1)?

Reply (2): Yes.

Question (3): Are piping components fabricated with longitudinal welds made in accordancewith para. 302.2.3 that are intersected by a circumferential weld during fabrication, assembly, orerection that is examined, required to also be examined per para. 341.4.1(b)(1)?

Reply (3): Yes.

Question (4): If specified in the engineering design or specifically authorized by the Inspector,may in-process examination be substituted for radiographic examination required by para.341.4.1(b)(1) on a weld-for-weld basis?

Reply (4): The Committee believes your question can be answered by previous Interpretation11-15, a copy of which is attached.

Question (5): May ultrasonic examination be substituted for radiographic examination forwelds made with the addition of filler metal shown in Table 302.3.4, No. 3 and 4 if

(a) designer determines the ultrasonic examination technique employed and the acceptancecriteria used will meet the acceptance limits established for defects in Table 341.3.2 for radiography

(b) designer documents the technique and criteria in the engineering design and also acknowl-edges the Code Committee replies in Interpretation 11-05

(c) Owner accepts the validity of the technique and criteria and also acknowledges the CodeCommittee replies in Interpretation 11-05

Reply (5): The Code does not specifically address this; see para. 300(c)(3).


Subject: ASME B31.3-2006, Para. 345.2.3(a), Leak Testing


File: 08-1241

Question: In accordance with ASME B31.3-2006 Edition, if flanged subassemblies of a pipingsystem have separately passed leak tests per para. 345.4, 345.5, or 345.6, does B31.3 require anyadditional testing after assembly?

Reply: No.

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Subject: ASME B31.3-2006, Para. 331.1.3, Postweld Heat Treatment (PWHT)


File: 08-1243

Question: If P-No. 1 material of 19 mm thickness is welded to P-No. 1 material that is nominally25 mm but has been tapered bored to 19 mm at the weld joint, is PWHT required?

Reply: The Committee believes your question can be answered by previous Interpretation 17-21.


Subject: ASME B31.3-2006, Paras. 304.3.5(e) and 319.3.6, Reinforcement Pad Thickness


File: 08-1244

Question (1): Does the Code provide a maximum reinforcing pad thickness for pressure design?

Reply (1): No.

Question (2): Does the Code prohibit the use of more than one reinforcing pad, such as theuse of two 3-mm pads to provide 6-mm pad thickness?

Reply (2): No.

Question (3): Does the Code reference complete encirclement reinforcement?

Reply (3): Yes. See para. 304.3.5(e).

Question (4): Does the Code provide a specific SIF for complete encirclement reinforcementon tees?

Reply (4): No.

Question (5): Does the Code permit the use of more applicable data to establish an SIF forreinforced intersections?

Reply (5): Yes. See para. 319.3.6.


Subject: ASME B31.3-2006, Para. 304.1.1, Pressure Thickness


File: 08-1245

Question: Does ASME B31.3-2006 Edition permit the use of pipe supplied to a thickness lessthan tm as defined in para. 304.1.1?

Reply: No. See also Interpretations 10-20 and 13-07.

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Subject: ASME B31.3-2006, Para. 328.5.4(d), Welded Branch Connections


File: 08-1246

Question: In accordance with ASME B31.3-2006 Edition, when para. 328.5.4(d) is applied toproprietary integrally reinforced branch connection fittings, does the term fully penetrated grooveweld describe a weld that fills to the manufacturer’s weld line or to the top of the groove if noweld line is present?

Reply: Yes; see definition of groove weld under size of weld in para. 300.2. See also Interpretation13-11.


Subject: ASME B31.3-2006, Para. 323.2.2(f), Stainless Steel


File: 08-1438

Question: Do the temperature limitations specified in ASME B31.3-2006, para. 323.2.2(f) applyto austenitic stainless steel pipe and fitting materials listed in Table A-1 or are they applicableonly to the circumferential welds when these components are joined by welding?

Reply: The Committee believes your question can be answered by previous Interpretation 18-12.


Subject: ASME B31.3-2006, Weld Repair Requirements


File: 08-1439

Question (1): Does Interpretation 2-18 apply to the ASME B31.3-2006 Edition?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2006 Edition, does Interpretation 2-18 apply towelds made by manufacturers of listed components?

Reply (2): No.

Question (3): If interpretation numbers are listed in the latest version of B31.3 (i.e., 2006), arethey still valid?

Reply (3): See general information published with interpretations.

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Subject: ASME B31.3-2006, Para. 328.5.1(b), Weld Map and Welder Sign


File: 08-1440

Question: In accordance with ASME B31.3-2006 Edition, para. 328.5.1(b), is it required that aweld map be created to identify the work of each welder or welding operator if each weld oradjacent area has been marked to identify the welder or welding operator?

Reply: No.


Subject: ASME B31.3-2006, Para. 323.2.2(d), Use of Carbon Steel Materials Without Impact Testing


File: 09-529

Question: In accordance with ASME B31.3-2006 Edition, if a material is exempted from impacttesting because the requirements of para. 323.2.2(d) are satisfied, are welds and heat affectedzones (including those of production welds) required to be impact tested per Table 323.2.2,Column B (B-3)?

Reply: No.


Subject: ASME B31.3-2006, Para. 345.3.1, Hydrotest


File: 08-1669

Question: Does ASME B31.3-2006 Edition permit hydrostatic leak testing of metallic pipe afterthe internal nonmetallic coating is applied?

Reply: Yes.


Subject: ASME B31.3-2008, Table A-1, Basic Allowable Stresses for Metals


File: 08-1608

Question: In accordance with ASME B31.3-2008 Edition, may the Table A-1 basic allowablestresses in tension above 1000°F for ASTM A 182, Grade F316L forging be applied for ASTMA 182, Grade F316 forging having a carbon content less than 0.04%?

Reply: Yes.

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Subject: ASME B31.3-2006, Code Case 181, Use of Alternative Ultrasonic Examination AcceptanceCriteria


File: 08-1611

Question: Does Code Case 181 have a limitation for the minimum thickness of material forits use?

Reply: No.


Subject: ASME B31.3-2008, Para. 322.6.3, System Pneumatic Leak Test Pressure


File: 09-247

Question (1): In accordance with ASME B31.3-2008 Edition, during relieving events with systemrelief devices per para. 322.6.3, may the pressure in the piping system during the event exceedthe system pneumatic leak test pressure?

Reply (1): No. See para. 302.2.4(e).

Question (2): When establishing the maximum allowable relieving pressure permitted in accor-dance with para. 322.6.3(c), may the test pressure used in accordance with para. 345 be exceeded?

Reply (2): The Code does not explicitly address this situation.


Subject: Code Case 181, Table 1, Use of Alternative Ultrasonic Examination Acceptance Criteria


File: 09-424

Question: In Code Case 181, Table 1, must both the a/t and � criteria be satisfied for acceptance?

Reply: Yes. See revised Code Case 181, new para. (i)(4)(d) for alternate acceptance criteria.


Subject: ASME B31.3-2004, Fig. 328.2B and Para. 300.2, Definitions


File: 09-497

Question: In accordance with ASME B31.3-2004 Edition, if the fabricator failed to meet theminimum weld sizes described in para. 328.5.2, does para. 300(c)(3) allow the designer to performan analysis after fabrication, document it in the engineering design, and have the validity acceptedby the owner, to show that the existing fillet weld sizes are adequate?

Reply: Yes.

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Subject: ASME B31.3-2006, Para. 341.3.3, Defective Components and Workmanship


File: 08-473

Question: For a weld repair to a portion of a circumferential weld that was completely examined,does ASME B31.3-2004, para. 341.3.3 require that only the repair weld area be reexamined afterthe repair?

Reply: Yes, unless the materials are P-Nos. 3, 4, or 5 and heat treatment is required; then theentire weld must be reexamined after completion of any heat treatment [see para. 328.6, para. 331.1,Table 331.1.1, and para. 341.3.1(a)].


Subject: ASME B31.3-2008, B31.3 Versus U-Stamp


File: 09-1002

Question (1): Are heat exchangers within the scope of ASME B31.3?

Reply (1): No. Refer to para. 300.1.3(d) and Fig. 300.1.1. However, applicable design standardsmay be as agreed between purchaser and manufacturer.

Question (2): Does ASME B31.3 have a certification and code stamp requirement?

Reply (2): No.

Question (3): Are there any advantages to designing to ASME B31.3 instead of ASME Sec-tion VIII?

Reply (3): We cannot respond to your request, since ASME does not provide consulting assist-ance. We regret that we cannot serve you in this instance, and suggest that you contact a reputableconsulting organization experienced in B31 piping applications.


Subject: ASME B31.3-2008, Para. 328.5.1(c), Tack Welding Welder Performance Qualifications


File: 09-1003

Question (1): Does ASME B31.3, para. 328.5.1(c) require that tack welds, whether they are tobe incorporated into the final weld or be removed, be made by a qualified welder?

Reply (1): Yes.

Question (2): Does ASME B31.3, para. 328.5.1(c) require that tack welds be made to a qualifiedWPS for that joint?

Reply (2): Yes; see para. 328.5.1(a).

Question (3): Does ASME B31.3, para. 328.5.1(c) allow tack welds on a groove weld joint to bemade by a welder qualified on a fillet weld test?

Reply (3): No. See ASME BPV Code Section IX, para. 303.2.

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Subject: ASME B31.3-2008, Table 302.3.5, General Note (b), Critical Temperatures


File: 09-1066

Question (1): In accordance with ASME B31.3-2008 Edition, when determining critical tempera-ture of welded pipe, and when ASME BPV Code Section II, Part D, Table 1A does not have atime-dependent Note associated with the material, shall the designer use the time-dependentNote associated with the base material of which the pipe is constructed?

Reply (1): Yes; see General Note (b) in Table 302.3.5.

Question (2): In accordance with ASME B31.3-2008 Edition, when determining critical tempera-ture and when ASME BPV Code Section II, Part D, Table 1A does not have a time-dependentNote associated with the material, shall the designer treat the material as a material not listedin Section II, Part D for the purpose of determining critical temperatures?

Reply (2): Yes; see General Note (b) in Table 302.3.5.

Question (3): In accordance with ASME B31.3-2008 Edition, when a material has multiplelistings in ASME BPV Code Section II, Part D that have different time-dependent Notes associatedwith them, and the designer does not have sufficient information to determine the original productform from which a component has been manufactured, is the designer required to use theminimum calculated critical temperature based upon all listings for the product form in ASMEBPV Code Section II, Part D?


Question (4): In accordance with ASME B31.3-2008 Edition, when a designer has specified adual certified material, may the designer use the time-dependent Notes associated with any ofthe product forms to which the material complies when determining the critical temperature?


Question (5): In accordance with ASME B31.3-2008 Edition, when a material does not appearin ASME BPV Code Section II, Part D, Table 1A but does appear in Table 1B, shall the designeruse the same methodology for determining critical temperature as for materials listed in Table 1A?

Reply (5): This matter is not addressed by the Code.

Question (6): In accordance with ASME B31.3-2008 Edition, may a designer treat a listed materialas an unlisted material, establish allowable stresses in accordance with para. 302.3.2, and thencalculate the critical temperature in accordance with Table 302.3.5, General Note (b)?

Reply (6): No.

I-14



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Subject: ASME B31.3-2008, Para. 302.2.4, Weld Joint Strength Reduction Factors


File: 09-1067

Question (1): Where carbon steel is used at design temperatures below 800°F, does ASMEB31.3-2008 require that a weld joint strength reduction factor, W, of 1.0 be used?

Reply (1): The Code does not provide a weld joint strength reduction factor for carbon steel.

Question (2): Where carbon steel requires a design temperature above 800°F to allow for ashort-term upset condition that falls outside the scope of para. 302.2.4, does ASME B31.3-2008require the use of a weld joint strength reduction factor, W, other than 1.0?

Reply (2): The Code does not provide a weld joint strength reduction factor for carbon steel.


Subject: ASME B31.3-2008, Table B-1, Nonmetallic Piping


File: 09-1068

Question (1): In accordance with ASME B31.3-2008, when Table B-1 materials without a maxi-mum recommended temperature limit are to be used at temperatures greater than 23°C, is thedesigner responsible for demonstrating the validity of the allowable stresses and other limits inaccordance with para. A323.2.4?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2008, when Table B-1 materials without a maxi-mum recommended temperature limit are to be used at temperatures greater than 23°C, is thedesigner permitted to use published manufacturer’s data for material properties without verifyingthe manufacturer’s methodology, calculations, and test results for development of the data?

Reply (2): No.

Question (3): Does ASME B31.3-2008 establish maximum temperature limits for nonmetallicmaterials listed in Appendix B?

Reply (3): No. See para. A323.2.1(b).

Question (4): When Table B-1 explicitly states thicknesses of pipe/tubing, does ASME B31.3-2008require the use of the hydrostatic design stresses listed for determining other thicknesses of thesame material?

Reply (4): The Code does not address this issue.

Question (5): For materials listed in Table B-1, are the hydrostatic design stresses listed inASME B31.3-2008 applicable for all design pressures?

Reply (5): Yes.

Question (6): When Table B-1 materials with a minimum recommended temperature limit of23°C are to be used at temperatures less than 23°C, does ASME B31.3-2008 require the designerto specify toughness testing at or below the lowest expected service temperature?

Reply (6): Yes.

I-15



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Subject: ASME B31.3-2008, Flame Arrester


File: 09-1069

Question: Shall in-line pressure-retaining portions of a flame arrester be designed, fabricated,examined, and tested in accordance with ASME B31.3?

Reply: Yes. See definitions of piping and piping components in ASME B31.3, para. 300.2. See alsopara. 300.1.1.


Subject: ASME B31.3-2008, Table 341.3.2, Acceptance Criteria for Welds


File: 09-1444

Question (1): Does ASME B31.3-2008 require the use of the undercut criteria in Table 341.3.2to evaluate metal removal from the toe of a weld by mechanical means?


Question (2): Does ASME B31.3-2008 allow for the repair of excessive undercutting by anymeans other than adding weld metal to bring the metal to an acceptable plane?

Reply (2): Yes, provided the criteria in Table 341.3.2 and the requirements of para. 304 are met.


Subject: ASME B31.3-2008, Para. 300.2, Definition of Piping Component


File: 09-1445

Question: Are non-inline instruments (e.g., pressure transmitter) connected to piping consideredpiping components as defined in para. 300.2?

Reply: No.


Subject: ASME B31.3-2008, Table A-1, Material 25Cr–20Ni Pipe


File: 09-1446

Question: Does ASME B31.3 permit the values listed in Table A-1 including Note (35) formaterial 25Cr–20Ni pipe, ASTM A 312 Grade TP310 to be used to determine design requirementsfor Grade TP310H?

Reply: Yes.

I-16



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Subject: ASME B31.3-2008, Para. 305.1, General Pipe


File: 09-1489

Question: In accordance with ASME B31.3, may API 5L Grades A and B spiral seam weldedpipe be used for Normal Fluid Service and Category M Fluid Service piping?

Reply: Yes.


Subject: ASME B31.3-2006, Para. 323.2.2(d), Carbon Steel Materials Without Impact Testing


File: 09-1605

Question (1): Does ASME B31.3 permit the application of para. 345.2.3(c) for a piping systemthat is exempt from impact testing in accordance with para. 323.2.2(d) except for the closureweld, which is qualified according to Table 323.2.2, Column A?

Reply (1): No.

Question (2): Does ASME B31.3 permit the application of para. 345.2.3(c) for a piping systemthat is exempt from impact testing in accordance with para. 323.2.2(d) except for the closureweld, which is qualified according to Table 323.2.2, Column B?

Reply (2): Yes.

I-17



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---




Introduction 1-31-61-713-0420-08

300 7-108-1719-11

300(b) 1-261-324-085-038-0910-1113-14

300(c) [300(e)] 1-31-61-73-23-44-106-03R (Vol. 7)7-058-3013-0216-1218-0919-3119-4820-0320-2020-38

300(c)(3) 22-32300.1 7-10

8-179-0612-2021-0721-32

300.1.1 1-471-522-263-14-196-018-019-0217-0122-34

(a)


Fig. 300.1.1 1-81-192-267-108-1722-39

300.1.3 [300.1.4] 1-81-161-191-263-215-09

300.1.3(d) 10-0521-22

300.2Category D Design 22-06

TemperatureCategory D Fluid 4-13

Service5-036-0119-34


1-736-018-099-02


8-0114-0317-2321-2422-41



8-09Table 300.4 20-23301 5-11301.1 20-40301.2 2-3

7-01301.2.1 2-29

13-15


301.3 2-317-0722-06

301.3.1 10-0221-47

301.3.2 4-11301.5.3 4-07301.7.2 3-4301.10 22-04302 1-32

19-03302.2 1-50302.2.1 16-18302.2.2 17-11

19-02302.2.3 19-19302.2.4 [302.2.3] 1-3

1-322-143-44-117-017-048-0414-0917-1220-0320-2220-5121-4522-0422-37

302.2.5 13-15302.3 20-25302.3.2 1-18

1-382-163-138-2511-0516-0419-3719-38

302.3.4 2-2017-14

Table 302.3.4 1-421-782-20



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Table 302.3.4 (Cont’d)3-1120-3421-0621-3722-10

302.3.5 1-201-502-142-152-243-44-104-126-03R (Vol. 7)6-077-047-058-1615-1516-1117-0417-1818-1620-0221-3422-07

Table 302.3.5 16-1022-36

302.3.6 1-502-152-162-1719-1820-0220-4920-50

302.4 1-20303 6-05304.1.1 1-42

1-541-7013-0715-0615-1016-1421-3822-21

304.1.2 1-421-571-681-702-1110-2021-1322-04

304.2 15-14304.2.1 21-13304.2.2 18-06

(b)


304.2.3 1-225-11

Fig. 304.2.3 1-22304.3 1-21

1-465-016-09

304.3.1 19-33304.3.2 4-05304.3.3 4-03

7-028-068-3711-1012-0514-1015-0517-2621-39

Fig. 304.3.3 8-37304.3.4 1-21

1-371-551-752-27

Fig. 304.3.4 1-70304.3.5 12-13304.3.5(e) 22-20304.5 3-4

9-0710-1419-12

304.5.1 8-1820-12

304.5.1(b) 9-10304.7.2 1-51

3-24-055-055-116-0910-710-1110-1812-0913-0213-0313-0513-1119-2920-2620-3721-0221-34

304.7.4 1-16305.1 22-43305.2 3-8

3-9305.2.1 1-38


305.2.3 6-017-0321-29

306.4 12-16306.4.2 11-03308.2.1 5-12308.2.4 5-12311.2.4 6-02

6-05311.2.5 10-04312 9-07314 20-48314.2.1 2-22Table 314.2.1 8-33

11-16315.2 3-6315.3 3-6317.2 1-17318 8-13318.2.2 19-45319.1.1 20-48319.2.1 2-17

20-45319.2.3 7-04

7-0512-0618-13

319.3.1 19-4021-09

319.3.1(b) 15-2421-16

319.3.2 21-26319.3.5 4-10319.3.6 1-6

1-71-552-245-1513-0522-20

Table 319.3.6 9-01319.4.1 1-33

13-14319.4.4 1-71

2-72-24

319.7 1-167-05

321.1.1 6-07321.1.4 1-49

19-3621-41

322.3 17-24322.6.1 10-10

12-18322.6.3 1-32

2-212-297-01



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



322.6.3 (Cont’d)12-0414-0922-30

323.1 19-28323.1.1 8-19

17-09R (Vol. 18)19-41

323.1.2 1-111-151-482-16-068-078-1911-0315-0417-0117-0819-27

323.2 3-9323.2.1 1-13323.2.2 15-12

15-2519-0719-2119-3519-3919-4720-1520-31

323.2.2(d) 22-2622-44

323.2.2(f) 22-23Fig. 323.2.2 14-08

20-1320-1521-2821-40

Table 323.2.2 [Table 1-12323.2.1]

1-481-651-762-193-84-014-1514-1215-1115-1617-09R (Vol. 18)18-1220-3121-0121-4322-03

323.2.4 6-06

(c)


323.3 1-765-1320-1422-01

Table 323.3.1 [Table 1-12323.3.2]

1-764-175-195-218-2910-0211-1215-2320-1020-3121-18

323.3.2 11-12323.3.4 8-30Table 323.3.4 22-02323.3.5 2-9Table 323.3.5 5-14323.4 15-03323.4.2 10-01

10-19Table 326.1 1-11

1-512-38-078-3419-1422-05

328 7-0212-1220-39

328.1 12-07328.2 [327.5] 1-66

11-0914-1320-19

Fig. 328.2(b) 22-32328.2.1 [327.5.1, 327.5.2] 1-76

4-178-2919-2220-1920-43

328.2.2 20-19328.2.2(g) 14-05328.2.2(i) 19-26328.2.3 15-19

18-08328.4 13-01328.4.2 and Fig. 328.4.2 12-10328.4.3 14-04Fig. 328.4.4 8-28

9-08328.5 [327.4] 5-09


328.5.1 [327.4.1] 5-1722-2522-35

328.5.2 [327.4.2] 5-1216-0619-20

Fig. 328.5.2 [Fig. 327.4.2] 1-285-126-026-058-2715-0819-1620-01

328.5.3 20-05328.5.4 [327.4.4] 1-59

1-742-104-034-147-088-1310-0413-1121-0222-22

Fig. 328.5.4 [Fig. 327.4.4] 1-591-744-034-167-08

328.6 2-18330 8-21330.1 8-23Table 330.1.1 9-05331 8-12

20-3921-46

331.1.1 8-089-0514-0119-15

Table 331.1.1 [Table 1-69331.3.1]

2-25-068-249-0312-1414-1617-0120-4421-1221-19

331.1.2 8-05331.1.3 [331.3.6] 1-39

1-594-065-06



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



331.1.3 [331.3.6] (Cont’d)9-0311-0614-0115-1817-1317-2118-0219-2422-19

331.1.4 [331.1.2] 5-08331.1.6 [331.3.4] 5-08

16-09331.1.7 [331.3.2] 1-78

8-22331.2 18-04331.2.2 [331.1.1] 1-39

1-78331.3.4 8-05331.3.7 8-05332.1 8-03

19-04332.2 [329.1] 1-23

1-534-028-20

332.2.2 16-08332.4 [329.3, 330.2] 2-2

19-04332.4.2 11-03

15-17335.1.1 15-07

17-25335.2 2-5335.2.3 17-20

21-14Fig. 335.3.3(a) 20-36340.2 [336.1.2] 1-26340.3 [336.3] 1-10

10-03340.4 [336.2] 1-31

17-1520-33

341 10-1615-1319-4921-17

341.1.4.1 21-20341.2 [336.1.1, 336.1.3] 1-10

1-261-272-2810-03

341.3.1 [336.5] 1-642-419-1521-48

341.3.2 8-3221-4422-40

(d)


Fig. 341.3.2 [Fig. 327.4.1] 5-0913-16

Table 341.3.2 14-0214-0714-1516-0717-0317-2218-0720-1620-2020-34

[Table 327.4.1A] 1-11-91-141-412-85-045-135-165-175-185-206-047-06

[Table 341.3.2A] 8-328-389-0411-0811-1412-2213-16

341.3.3 14-1422-33

341.3.4 [336.5, 336.5.4] 1-622-252-323-53-1410-0910-1211-0211-0413-1216-0116-0216-0518-01

341.4 [336.5] 1-241-453-125-2011-0121-2322-17

341.4.1 [336.5.1] 1-101-261-271-60


341.4.1 [336.5.1] (Cont’d)2-122-283-73-124-125-108-028-108-2610-0310-1711-1111-1411-1518-1419-0519-4220-0920-3421-04

341.4.2 8-38341.4.3 8-10

20-09341.5 8-38341.5.1 [336.6.1] 1-5

3-1220-34

342 15-21342.1 [336.4.1] 2-28

21-05343 [336.4.1] 2-28344 [336.4] 5-09

16-1318-1120-42

344.1 13-12344.2 [336.4.2] 2-28

8-108-2611-1115-2118-17

344.2.1 19-17344.2.2 21-20344.5 [336.4.5] 1-10

1-602-12

344.5.1 20-3420-4122-08

344.6 [336.4.6] 1-60344.6.2 10-17344.7 [336.4.7] 2-28

3-1412-0119-17

344.7.1 11-1121-20



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



345 [337] 1-21-722-313-38-3116-0317-3019-2319-3019-4920-1721-11

345.1 [337.1] 1-41-304-046-088-1512-2120-2421-3622-14

345.2.2 8-3120-4618-1020-4721-42

345.2.3 20-0720-1120-2420-27

345.2.3(a) 22-1522-18

345.2.3(c) 21-1022-16

345.2.3(i) 17-2820-37

345.2.4 [337.4.3] 1-35345.2.5 19-44345.2.6 [337.1] 1-2

5-2219-2320-06

345.3 [337.3] 2-63-105-0212-03

345.3.1 20-2822-0922-27

345.3.4 22-14345.4 8-04

19-2522-11

345.4.1 12-19345.4.2 [337.4.1] 1-35

1-611-632-234-04

(e)


345.4.2 [337.4.1] (Cont’d)9-0913-1318-0319-1020-46

345.4.3 [337.4.2] 1-63345.5 [337.4.4] 1-35

1-436-0811-0713-0619-3222-11

345.5.1 22-14345.5.2 11-19345.5.4 12-02

20-46345.7 [337.5.2] 1-36345.8 [337.6] 1-25

3-1017-0219-0620-18

345.9 [337.5.1] 4-095-076-088-1510-1512-0112-2115-0217-0517-1018-1520-18

345.9.1 20-0620-43

A302.2.3 20-30A302.2.4 21-33A304 8-14A304.1.1 14-17

14-18A304.5.1 1-67A304.7.2 13-08A305 11-17A314 8-33A322.6 17-29A323.4.2 10-06

11-1821-3021-31

Table A326.1 20-30A327.2.4 7-09A328 21-15A328.2(a) 10-8A328.2.1 8-14

18-05A328.2.5 17-06


A328.5 8-1410-0813-08

K300 20-09K300(a) 17-16K303 20-21K304.1.2 11-21

14-11K304.8 22-04K314.2 17-19K315 7-07K322.3 7-07K323.1.2 19-09K323.1.5 21-03Table K323.3.1 20-41


3-6M323.1.3 3-7M326 2-13M335.3.3 20-36M335.4 [M335.5, M335.6] 3-6M341.4 [M336.5] 1-24

1-4520-09

M341.4.1 [M336.5.1] 2-283-7

M345 20-47M345.1 6-08MA306.5 9-02MA313 21-21MA323.4 9-02

19-08MA323.4.2 8-35Appendix A Notes (no 2-20


1-181-291-381-481-772-13-83-9



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Table A-1 [Table 1] (Cont’d)3-134-124-136-016-067-038-118-188-258-348-3611-1312-0915-0119-4319-4620-2920-3221-2822-1222-2822-42

Table A-1B [Table 1] 1-782-204-187-03

(f)


Appendix B 19-13Table B-1 22-38Appendix D 1-6

1-71-341-461-551-561-712-72-244-165-015-156-0612-0812-1112-1713-0518-18


5-1019-20

Appendix F [F323.2] 1-29


Appendix F, F323 20-20Appendix F, FA323.4 20-30Appendix G 5-12Appendix H 8-06


1-541-755-04

Appendix M 6-018-0920-23

Appendix P 22-07Appendix V 17-17Appendix X, X3.1.3 12-23Appendix X, X3.2.2 13-09Appendix X, X302.2.3 15-22

Case 137 3-1

Case 141 1-51

Case 181 22-13

22-29

22-31



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---


SUBJECT INDEX



1-91-141-412-85-095-135-175-185-206-047-068-3212-2213-1614-0214-07



3-138-118-2510-1315-01

for ASTM A 182 22-28for ASTM A 312 1-29for ASTM A 351 11-13for ASTM A 387 8-25for ASTM A 464 8-11for ASTM A 570 1-38for ASTM A 587 1-13for ASTM A 671 1-48for austenitic stainless 3-13


pipe

Allowable Stress Range 22-07




Bellows 13-09

(g)


Bending 4-028-0315-1716-08


diameter








2-276-09




8-3712-0512-1314-1015-0521-39

weld requirements 2-104-034-14



7-027-0810-0413-1117-2622-22


Buckles 1-231-53


Category D Design 22-06Temperature


5-0321-47



9-0220-23


9-0212-15


Code Case 22-1322-2922-31


7-10



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Code Coverage (Cont’d)B31.3 versus B31.9 21-32buried piping 21-07cryogenic piping 21-22fired heaters 15-09general hydrocarbon 6-01


21-24intent 16-12later editions 19-01new and replacement 5-22

piping12-2119-49


2-26tobacco plant piping 3-1Components (see also Fittings, Flanges,

Standard Components, Unlisted, andValves)


defining 17-2320-11




5-1022-05

Compressorsinternal piping 1-8Corrugated Bends 1-23Cyclic Loading 5-12

17-04Design (see also Pressure Design)additional design 12-13



20-40Displacement Strain 20-45Displacement Stress 2-14

2-2412-0618-1321-09

(h)



Effective Date 22-24



5-1811-0121-0421-23






1-451-622-122-324-1211-15

records 11-1121-20

required 1-241-606-0411-1411-1515-1315-2118-1421-1722-17





Examination)









Fatigue 18-09


FittingsB16.9 1-7

5-0119-1420-21



MSS SP-75 1-11

Flame Arrester 22-39



3-49-7



metallic



21-16



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---





1-565-01


2-24


12-0812-17






12-1512-1615-03



8-09


onset




19-04for carbon steel pipe 21-12for flared laps 11-03for valve parts 8-12governing thickness 1-39

1-594-065-0611-06

(i)


Heat Treatment (Cont’d)heating rate 1-69local 5-08

8-05monitoring 5-08

8-05postweld 20-39

20-4422-19

requirements 8-088-218-238-249-039-0512-1414-0114-1615-1818-0421-4621-48


required2-4


Impact Tests


11-1218-1220-10


heat treatment required 5-19in qualifying procedures 8-29of aluminum filler metals 2-19of austenitic stainless steel 1-65of bolting materials 4-15of duplex stainless steel 20-13of heat-affected zone 1-76


1-651-765-2119-2121-19

requirements 15-2317-0920-31


Impact Tests (Cont’d)requirements (Cont’d)

21-18temperature limitation 5-14

8-3014-1219-0719-4321-0121-2821-4322-0122-0222-2622-44




5-135-165-20



2-86-04




Joint Factorsfor ASTM A 234, ASTM A 2-20

312, ASTM A 403for branch connections 8-06for circumferential welds 1-42for longitudinal and spiral 1-78

welds3-118-0617-1420-34



3-1022-09

instrument tubing 7-07special 8-13tapered pipe thread 16-15threaded 11-16

17-1920-48



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---





15-2216-03

alternative 4-095-076-088-1512-0112-2117-0517-1018-1520-18






pressure4-04


negative pressure 22-11of discharge piping 1-72of joints 20-28of newly constructed 1-4

systems5-025-228-1520-24

of piping and vessel 1-63of piping connecting 3-3



3-105-23


11-1912-0213-0619-2319-3019-3220-17

(j)


Leak Tests (Cont’d)pneumatic test (Cont’d)

22-30preparation for 2-6

3-105-025-2312-03


2-2313-1320-1722-27

requirements 8-1513-1322-1422-1522-18

sensitive 1-2517-0219-0619-23

system pneumatic leak test 22-30pressure



19-10time 20-46

21-1121-42

welds 20-0620-0720-3521-1021-36

Lethal Substance 1-73Limitationson hardness 2-2on imperfections (see


3-6Liquid Penetrant Examinationrequirements 11-14Low Temperature Requirements (see

Impact Tests)MaterialsAPI 5L 1-78

2-43-93-116-016-06

API 5LX 2-411-05

ASTM A 234 2-20ASTM A 312 1-29

1-772-20

ASTM A 350 19-07ASTM A 351 11-13ASTM A 387 8-25


Materials (Cont’d)ASTM A 403 1-77

2-20ASTM A 487 8-07ASTM A 537 2-1ASTM A 570 1-38ASTM A 587 1-13ASTM A 633 1-11ASTM A 658 3-8ASTM A 671 1-48ASTM B 241 2-19ASTM B 337 4-18ASTM B 464 8-11austenitic stainless steels 3-13bases for design stresses 11-05carbon steel 19-39certification 5-10

8-0213-1021-03



17-1122-1222-42

notch sensitive 2-22notes 20-29reidentification 8-19toughness requirements 5-19traceability 19-28unlisted material 11-05

11-2015-0417-0117-0819-27



5-11



5-16tn 1-75



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8-14materials 19-08

20-3021-3021-31

pressure design 14-1714-1821-3322-38



2-144-11

loads 1-502-152-162-1719-1820-4920-5021-08


2-305-2219-11




20-04components 22-41curved and mitered 15-14

segments18-06

elbowless 8-03general 22-43in corroded condition 2-15instrument 17-24made from plate 1-48


14-09pressure testing 9-09

(k)


Pipe (Cont’d)spiral welded 7-03straight, under internal 10-20

pressure11-2114-11

types 20-27










20-0320-5121-3321-45




13-1519-12


components14-18

of pipe 1-421-541-571-681-702-1111-2113-0715-0615-1017-0621-3822-04


Pipe (Cont’d)of listed components 16-14

16-18of unlisted components 13-02

13-0313-0521-34

of valves 8-0413-15


20-22


2-2919-41


pressure reducing station 19-31requirements 17-29setting 1-32

7-0112-04



Pressure–Temperature 5-05Rating

8-34


Pressure Thickness 22-21

Progressive Examination 1-51-623-510-0910-1010-1211-0211-0413-1216-0116-0216-0518-01




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1-451-622-122-323-12


11-0111-0512-0322-08


spot radiography 1-623-12


2-4


8-0210-0321-03






11-10limits of 2-27

9-04

Reinforcement Pad 22-20Thickness



inspection17-15

Safeguarding 5-12


(l)


Seismic Loads 4-07stresses due to 2-17


changematerial 21-29spiral welded pipe 7-03


Stainless Steel 22-0322-23


8-02valves 5-05

8-048-07



19-3819-4620-32

displacement stress range 7-0412-0620-02


16-0416-1120-02


1-502-152-244-104-126-03R

(Vol.7)

6-077-058-1617-1818-16

reduction factors 16-1021-34



2-246-03R

(Vol.7)

basis for 1-56branch connections 2-7for B16.9 tees 1-7for fabricated intersections 1-6

5-15for tees 1-46

1-551-715-0112-0812-17


12-11


20-03bending 16-08critical 22-36design minimum 10-02

temperature14-0814-1215-1115-1617-0719-35

large changes 8-09limitations 4-13

5-1415-1215-2519-47


reduction 4-1120-15


verification 16-09



17-2118-02

in stress calculations 1-20welding tee 18-18



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3-6


20-0920-42

requirements 10-17


1-513-64-055-058-710-1810-0710-1112-0913-0213-0313-0519-0319-1920-2520-3721-34


U-Stamp 22-34




8-2613-16

requirements 2-2810-0313-1618-17

(m)


Washers, Use of 2-5


17-2218-0721-4422-40

bevels 12-10closure 22-16configuration 19-16definition 14-03

19-05examination of welds 10-15

11-0111-1413-1614-1414-1515-0219-1719-4220-0620-43

fillet size 1-7410-1916-0620-01


4-034-148-3711-1019-25




22-37longitudinal 2-20

3-114-18

map 22-1022-25

of valves 12-12preparation for welding 13-01

14-04


Weld (Cont’d)qualification of position 1-66reinforcement 7-08

11-08repair 2-18

21-19sign 22-25size 22-32socket 6-02

6-0510-1915-0816-0619-20

spacing of 7-02tack 22-35types 20-05

20-07

Welder Qualification

by others 15-1918-0819-2622-35

requirements 17-27

Welding Procedure

qualification of 1-121-651-661-764-178-238-2911-0914-0514-1319-22


specification 8-218-2220-1420-1920-31

Workmanship 22-33



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Replies to Technical InquiriesNovember 1, 2005 through October 31, 2007

GENERAL INFORMATION







I-1



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Appendix M and Para. 301.3.1, Temperature Limits for Category D FluidService. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-47 07-1482

Duration of Occasional Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-08 06-379Fig. 323.2.2B, Reduction in Minimum Design Metal Temperature Without

Impact Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-40 07-1359Para. 300.1, Buried Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-07 06-377Para. 300.1.1, Content and Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-32 06-1197Para. 300.1.3(d), Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-22 06-1101Para. 300.2, Flammable Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-25 06-1104Para. 300.2, Inline Piping Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-24 06-1103Para. 302.2.4, Allowances for Pressure and Temperature Variations . . . . . . . . . . . . 21-45 07-1397Para. 302.3.4, Table 302.3.4, and Table A1-B, Weld Joint Quality Factor . . . . . . . . . 21-37 07-1356Para. 302.3.5(e) and Appendix A, Weld Joint Strength Reduction Factor,

W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-35 07-505Para. 304.1.1(b), Pressure Design of Straight Pipe, Maximum and Nominal

Thread Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-38 07-1357Paras. 304.1.2, Design of Straight Pipe Under Internal Pressure and 304.2.1,

Pipe Bends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-13 06-1091Para. 304.3.3, Reinforcement of Welded Branch Connections . . . . . . . . . . . . . . . . . . 21-39 07-1358Para. 304.7.2, Pressure Design of Unlisted Components. . . . . . . . . . . . . . . . . . . . . . . 21-34 07-504Paras. 304.7.2 and 328.5.4(d), Partial Penetration Welding. . . . . . . . . . . . . . . . . . . . . 21-02 06-297Para. 305.2.3, Material for Severe Cyclic Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 21-29 06-1191Para. 319.2.3, Displacement Stress Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-09 06-387Para. 319.3.1(b), Flexibility Analysis Thermal Expansion Data . . . . . . . . . . . . . . . . . 21-16 06-1094Para. 319.3.2, Properties for Flexibility Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-26 06-1105Paras. 321.1.4(c) and 323.2.2(d), Piping Support Materials. . . . . . . . . . . . . . . . . . . . . 21-41 07-1360Para. 323.2.2; Fig. 323.2.2A; and Table A-1, Note (6); Lower Temperature

Limits for Impact Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-28 06-1185Paras. 323.3.1 and K323.3.1, and Table K323.3.1, Impact Testing . . . . . . . . . . . . . . . 21-18 06-1097Para. 328.6, Weld Repair and Table 331.1.1, Postweld Heat Treatment . . . . . . . . . . 21-19 06-1098Para. 331, Heat Treatment Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-46 07-1398Para. 335.2.3, Bolt Length of Flanged Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-14 06-1092Para. 341, Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-17 06-1096Para. 341.3.1(a), Examinations and Postweld Heat Treatment . . . . . . . . . . . . . . . . . . 21-48 07-1483Para. 341.4, Extent of Required Examination for Category D Service . . . . . . . . . . . 21-23 06-1102Para. 341.4.1, Examination of Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-04 06-299Paras. 341.4.1(b)(1), 344.2.2, and 344.7.1, Examination Records. . . . . . . . . . . . . . . . . 21-20 06-1099Paras. 342.1 and 342.2, Examination Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-05 06-374Para. 345.2.2, Leak Testing, Other Test Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 21-42 07-1361Para. 345.2.2(a), Duration of Leak Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-11 06-258,

06-295,06-296

Para. 345.2.3(c), Leak Testing of Closure Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-10 06-388Para. 345.2.3(c), Leak Testing of Closure Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-36 07-508Para. A302.2.4, Pressure Allowances for Nonmetallic Piping . . . . . . . . . . . . . . . . . . 21-33 07-502Para. A323.4.2, Fluid Service for Nonmetallic Piping . . . . . . . . . . . . . . . . . . . . . . . . . 21-31 06-1196Para. A323.4.2(a)(3), Fluid Service Requirements for Nonmetallic

Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-30 06-1194Para. A328, Bonding Procedure Specification for Plastic Piping. . . . . . . . . . . . . . . . 21-15 06-1093Paras. K323.1.5, Product Analysis and K346.2(b), Required Records . . . . . . . . . . . . 21-03 06-298Para. K323.3.5 and Table K323.3.5, Impact Testing for High Pressure

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-27 06-1184Paras. M319 and MA319, Piping Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-21 06-1100Table 302.3.4, Weld Joint Quality Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-06 06-375Table 323.2.2, Low Temperature Toughness Tests and Table 323.3.1,

Impact Testing Required for Metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-01 06-253Table 323.2.2, A-4(b), Impact Testing of Weld Metal and Heat Affected

Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-43 07-1362Table 331.1.1, Requirements for Heat Treatment of Carbon Steel Pipe . . . . . . . . . . 21-12 06-372Table 341.3.2, Acceptance Criteria for Welds — Internal Protrusions . . . . . . . . . . . 21-44 07-1363

I-2



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Subject: ASME B31.3-2004, Table 323.2.2, Low Temperature Toughness Tests and Table 323.3.1,Impact Testing Required for Metals

Date Issued: March 29, 2006

File: 06-253

Question (1): In ASME B31.3, Table 323.3.1, does the term manufacturer in Column A refer tothe manufacturer of the piping component?

Reply (1): Yes.

Question (2): Does ASME B31.3 require additional impact testing of ASTM A 333 Grade 6material if the assigned minimum temperature is −46°C (−51°F)?

Reply (2): Yes, unless the exemptions in Table 323.2.2, B-3 apply.

Question (3): Does ASME B31.3 require the manufacturer to perform impact testing at tempera-tures below the requirements described in the material specification?

Reply (3): ASME B31.3 does not address who should do the additional testing.

Question (4): Does ASME B31.3 require that the manufacturer, who as part of its manufactureutilizes girth welds to join ASTM A 333 Grade 6 pipe, perform impact testing if the minimumtemperature is −35°C (−31°F)?

Reply (4): Yes, unless exemptions in Table 323.2.2, A-3(b) apply.


Subject: ASME B31.3-2004, Paras. 304.7.2 and 328.5.4(d), Partial Penetration Welding


File: 06-297

Question (1): Does ASME B31.3-2004 permit partial penetration for branch connection groovewelds?

Reply (1): No; see para. 328.5.4(d).

Question (2): In accordance with ASME B31.3-2004, what is the effective weld throat thicknessrequired for a proprietary integrally reinforced branch connection fitting?

Reply (2): The thickness is as required by the design qualified in accordance with para. 304.7.2or MSS SP-97, and para. 328.5.4(d).


Subject: ASME B31.3-2004, Paras. K323.1.5, Product Analysis and K346.2(b), Required Records


File: 06-298

Question: Does ASME B31.3-2004 require any Certified Material Test Reports (CMTR)?

Reply: No; however, see paras. K323.1.5 and K346.2(b).

I-3



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Subject: ASME B31.3-2004, Para. 341.4.1, Examination of Welds


File: 06-299

Question: In accordance with ASME B31.3-2004, para. 341.4.1(b)(1), must welds to be examinedbe selected to ensure that each welding process used by each welder or welding operator doingthe production welding is represented?

Reply: No.


Subject: ASME B31.3-2004, Paras. 342.1 and 342.2, Examination Personnel


File: 06-374

Question (1): In accordance with ASME B31.3-2004, can the operator of an automatic weldingmachine also perform in-process examination of the production work?

Reply (1): No; see para. 342.2.

Question (2): In accordance with ASME B31.3-2004, can the operator of an automatic weldingmachine also perform examination of the production work other than in-process examination?

Reply (2): Yes, if qualified in accordance with para. 342.1.

Question (3): In accordance with ASME B31.3-2004, para. 341, may the examiner be employedby the contractor/manufacturer?

Reply (3): Yes.


Subject: ASME B31.3-2004, Table 302.3.4, Weld Joint Quality Factor


File: 06-375

Question: In accordance with ASME B31.3-2004, can the weld joint quality factor of API 5LSAW, GMAW, or combined GMAW/SAW welded pipe be increased to 1.00 by 100% radiographyof the weld?

Reply: The Code does not address increasing the weld joint quality factor of API 5L SAW,GMAW, or combined GMAW/SAW welded pipe.

I-4



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Subject: ASME B31.3-2002, Para. 300.1, Buried Piping


File: 06-377

Question (1): Does ASME B31.3-2002 apply to buried piping?

Reply (1): Yes.

Question (2): Does ASME B31.3-2002 provide rules for design of buried piping for overburdenand surface live loads?

Reply (2): No.


Subject: ASME B31.3-2004, Duration of Occasional Loads


File: 06-379

Question: Does ASME B31.3-2004 specify or provide guidelines for the duration of occasionalloads?

Reply: No.


Subject: ASME B31.3-2004, Para. 319.2.3, Displacement Stress Range


File: 06-387

Question: Does ASME B31.3-2004 require that the duration of an operating cycle be consideredwhen evaluating displacement stress range in accordance with para. 319.2.3?

Reply: No.


Subject: ASME B31.3-2004, Para. 345.2.3(c), Leak Testing of Closure Welds


File: 06-388

Question: Does ASME B31.3-2004 require the owner’s approval to apply the closure weldprovisions described in para. 345.2.3(c)?

Reply: No.

I-5



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Subject: ASME B31.3-2004, Para. 345.2.2(a), Duration of Leak Test


File: 06-258, 06-295, 06-296

Question: In accordance with ASME B31.3-2004, does a pressure test of less than 10-min durationby the pipe manufacturer satisfy the requirements of the required leak test in para. 345?

Reply: No.


Subject: ASME B31.3-2004, Table 331.1.1, Requirements for Heat Treatment of Carbon Steel Pipe


File: 06-372

Question: In accordance with ASME B31.3-2004, is PWHT required for circumferential jointsin API 5L X65 pipe when the thickness is greater than 19 mm (3⁄4 in.)?

Reply: Yes, unless the provisions of para. 331.2.2 are met.


Subject: ASME B31.3-2004, Paras. 304.1.2, Design of Straight Pipe Under Internal Pressure and304.2.1, Pipe Bends


File: 06-1091

Question (1): ASME B31.3-2004, para. 304.1.2 provides two equations to calculate pressuredesign thickness for straight pipe, eq. (3a) and eq. (3b), the former using the outside diameterand the latter using the inside diameter. Do these two equations yield the same results?

Reply (1): Yes, when the corrosion allowance in para. 304.1.1 is applied to the inside diameterof the pipe.

Question (2): In accordance with ASME B31.3-2004, para. 304.2.1, may the minimum requiredthickness of the extrados of a bend, after bending, in its finished form, as calculated by eq. (3e),be less than as required for straight pipe by eq. (3a)?

Reply (2): Yes, provided the requirements of para. 304.2.1 are met.


Subject: ASME B31.3-2004, Para. 335.2.3, Bolt Lengths of Flanged Joints


File: 06-1092

Question: Does the term bolt as used in ASME B31.3-2004, para. 335.2.3 include bolts, boltstuds, studs, and cap screws?

Reply: Yes; see para. 309. Also see Interpretation 17-20.

I-6



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Subject: ASME B31.3-2002 and B31.3-2004, Para. A328, Bonding Procedure Specification for PlasticPiping


File: 06-1093

Question (1): In accordance with ASME B31.3-2002 and B31.3-2004, must all items in paras.A328.2.1(b)(1) through (9) and paras. A328.4(a) through (e) be specified in the bonding procedurespecifications (BPS)?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002 and B31.3-2004, may a range be specifiedfor some of the items in paras. A328.2.1(b)(1) through (9) and paras. A328.4(a) through (e)?

Reply (2): Yes.

Question (3): In accordance with ASME B31.3-2002 and B31.3-2004, must the test assemblyrequired by para. A328.2.5(a) be tested within the ranges specified for some of the items requiredby paras. A328.2.1(b)(1) through (9), paras. A328.4(a) through (e), and any additional items inthe BPS?

Reply (3): Yes.

Question (4): In accordance with ASME B31.3-2002 and B31.3-2004, if the required items in aBPS per paras. A328.2.1(b)(1) through (9), A328.4(a) through (e), and any other items listed arespecified as a range, does Chapter VII set range limits for those items?

Reply (4): No.

Question (5): In accordance with ASME B31.3-2002 and B31.3-2004, for the items required byparas. A328.2.1(b)(1) through (9) and A328.4(a) through (e), are ranges required to be specifiedfor any of those items?

Reply (5): Yes.

Question (6): Does ASME B31.3 describe what information is required to be included in theprocedure qualification record (PQR) other than the dates and results of the bonding procedurespecification (BPS)?

Reply (6): No.

Question (7): In accordance with ASME B31.3-2002 and B31.3-2004, when items, in additionto those required by paras. A328.2.1(b)(1) through (9) and A328.4(a) through (e), are specified ina BPS, must all those items be followed when fabricating the BPS qualification test assembly?

Reply (7): Yes, if the additional requirements are applicable.

Question (8): In accordance with ASME B31.3-2002 and B31.3-2004, when making a BPS qualifi-cation test assembly in accordance with para. A328.2.5(c)(2), may three times the piping systemdesign pressure be used for PT in lieu of three times the manufacturer’s allowable pressure forthe components being joined?

Reply (8): No.

Question (9): In accordance with ASME B31.3-2002 and B31.3-2004, when performing a BPSqualification test for RTR or RPM materials, and the materials for the piping and the componenthave different specified manufacturer’s allowable pressures, can either the lower or higher of thetwo pressures be used for the calculation of PT?

I-7



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Question (10): In accordance with ASME B31.3-2002 and B31.3-2004, is it required to write aBPS for bonding each material formulation to other material formulations if a specific materiallisted in Chapter VII is manufactured to meet multiple chemical formulations?

Reply (10): No.

Question (11): In accordance with ASME B31.3-2002 and B31.3-2004, is it required to performa BPS qualification test for bonding each material formulation to other material formulations ifa specific material listed in Chapter VII is manufactured to multiple chemical formulations?

Reply (11): No.


Subject: ASME B31.3-2002, Para. 319.3.1(b), Flexibility Analysis Thermal Expansion Data


File: 06-1094

Question: In accordance with ASME B31.3-2002, para. 319.3.1(b), does the phrase “at maximum(or minimum) temperature for the thermal cycle under analysis” require the use of the highest(or lowest) anticipated metal temperature?

Reply: Yes.


Subject: ASME B31.3-2004, Para. 341, Examination


File: 06-1096

Question (1): Are WPS qualified in accordance with ASME BPV Section IX acceptable for usein ASME B31.3?

Reply (1): Yes, provided they were qualified in accordance with the applicable provisions ofpara. 328.2.1.

Question (2): Does ASME B31.3-2004 specify the mechanism for qualifying examination proce-dures and which results are required to be recorded?

Reply (2): Yes; see paras. 343 and 344.

Question (3): Does ASME B31.3-2004 require visual examination of the assembly of threaded,bolted, and other joints to satisfy the applicable requirements of paras. 335, A335, M335, MA335,and K335?

Reply (3): Yes; see paras. 341.4.1(a)(4), A341.4.1(a)(4), 341.4.3(a)(2), M341.4(a)(2), MA341.2(a)(2),and K341.4.1(a)(3).

Question (4): Does ASME B31.3-2004 require visual examination of fabrication (see para. 300.2for definition of fabrication)?

Reply (4): Yes. See paras. 341.1(a)(2), 343.1(a)(1), A341.1(a)(2), M341.4(a)(1), K341(a)(2), and 344.2.

I-8



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Subject: ASME B31.3-2004, Paras. 323.3.1 and K323.3.1, and Table K323.3.1, Impact Testing


File: 06-1097

Question: When performing impact tests to qualify a welding procedure, does the range ofmaterial thickness specified in Table 323.3.1 apply?

Reply: Yes.


Subject: ASME B31.3-2004, Para. 328.6, Weld Repair and Table 331.1.1, Postweld Heat Treatment


File: 06-1098

Question (1): Does ASME B31.3-2004 require heat treatment of weld repairs that are less thanor equal to 19 mm (3⁄4 in.) deep in a P-No. 1 material that was required to be heat treated inaccordance with Table 331.1.1 or the engineering design prior to examination?

Reply (1): Yes; see para. 328.6.

Question (2): Does ASME B31.3-2004 require heat treatment of weld repairs that are greaterthan 19 mm (3⁄4 in.) deep in a P-No. 1 material that was required to be heat treated in accordancewith Table 331.1.1 or the engineering design prior to examination?

Reply (2): Yes; see para. 328.6.


Subject: ASME B31.3-2004, Paras. 341.4.1(b)(1), 344.2.2, and 344.7.1, Examination Records


File: 06-1099

Question: In accordance with ASME B31.3-2004, para. 341.4.1(b)(1), is it required, for eachweld for which in-process examination is substituted, that examination and acceptance of eachapplicable item in para. 344.7.1 be recorded?

Reply: Yes; see Interpretations 11-11 and 18-17, and para. 344.2.2.


Subject: ASME B31.3-2004, Paras. M319 and MA319, Piping Flexibility


File: 06-1100

Question: In accordance with ASME B31.3-2004, may flexible hose be used in Category M FluidService?

Reply: Yes.

I-9



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Subject: ASME B31.3-2004, Para. 300.1.3(d), Scope


File: 06-1101

Question (1): Does the scope of ASME B31.3-2004 include vacuum insulated piping, e.g.,cryogenic transfer line?

Reply (1): Yes. Refer to paras. 300.1.1(b)(6), 301.7.3, and 345.2.5.

Question (2): Does ASME B31.3 apply to the cryogenic piping interconnecting pressure vessel(s),while both the piping and the vessel(s) are enclosed within a pressure vessel?

Reply (2): No.


Subject: ASME B31.3-2004, Para. 341.4, Extent of Required Examination for Category D Service


File: 06-1102

Question: In accordance with ASME B31.3-2004, do the requirements of para. 341.4.1(b)(1)pertaining to radiography or ultrasonic examination apply to Category D fluid service?

Reply: No; see para. 341.4.2.


Subject: ASME B31.3-2004, Para. 300.2, Inline Piping Components


File: 06-1103

Question (1): Does ASME B31.3-2004 require that the inline portions of instruments be designed,fabricated, examined, and tested in accordance with the rules of the Code?

Reply (1): Yes; see para. 300.2 (definition of “piping components”).

Question (2): Does ASME B31.3-2004 require that the portions of instruments that are not inlinebe designed, fabricated, examined, and tested in accordance with the rules of the Code?

Reply (2): The Code does not address this situation.

Question (3): In accordance with ASME B31.3-2004, may inline portions of an instrument notlisted in Table 326.1 be used?

Reply (3): Yes; see paras. 302.2.3 and 326.1.2.

I-10



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Subject: ASME B31.3-2004, Para. 300.2, Flammable Service


File: 06-1104

Question (1): In accordance with ASME B31.3-2004, is a liquid that has a flash point of 38°C(100°F) considered to be “flammable”?

Reply (1): It may or may not be, depending upon the ambient or expected operating conditions;see the definition of “flammable” in para. 300.2.

Question (2): In accordance with ASME B31.3-2004, may a nontoxic liquid with a flash pointof 38°C (100°F) be used as an alternate test fluid per para. 345.4.1?

Reply (2): Yes if the fluid is not flammable, as defined for the purpose of this Code in para. 300.2.


Subject: ASME B31.3-2004, Para. 319.3.2, Properties for Flexibility Analysis


File: 06-1105

Question: In accordance with ASME B31.3-2004, para. 319.3.2, can a value for modulus ofelasticity used in the analysis differ from the value shown in Appendix C?

Reply: Yes, when more directly applicable data is available; see Note (1) of Table 300.4.


Subject: ASME B31.3-2004, Para. K323.3.5 and Table K323.3.5, Impact Testing for High PressurePiping


File: 06-1184

Question: Does ASME B31.3-2004 require impact testing according to para. K323.3 for materialswhose product specifications require impact testing?

Reply: Yes.


Subject: ASME B31.3-2004, Para. 323.2.2; Fig. 323.2.2A; and Table A-1, Note (6); Lower TemperatureLimits for Impact Tests


File: 06-1185

Question: Are materials, for which a temperature of −20°F (−29°C) is listed in the MinimumTemperature column of Table A-1, exempt from impact testing for any combination of thicknessand temperature above −20°F (−29°C)?

Reply: Yes.

I-11



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Subject: ASME B31.3-2004, Para. 305.2.3, Material for Severe Cyclic Conditions


File: 06-1191

Question: In accordance with ASME B31.3-2004, may pipe material not listed in para. 305.2.3be used under severe cyclic conditions?

Reply: No.


Subject: ASME B31.3-2002, Para. A323.4.2(a)(3), Fluid Service Requirements for Nonmetallic Mate-rials


File: 06-1194

Question: Are PVC and CPVC products that are specifically designed for compressed air andinert gas service, which meet the material requirements of ASTM D 1784, acceptable for use incompressed gas service in B31.3 applications?

Reply: No; see para. A323.4.2(a)(3).


Subject: ASME B31.3-2002, Para A323.4.2, Fluid Service for Nonmetallic Piping


File: 06-1196

Question: Does the Code permit plastic products for use in compressed air or compressed gasservice in B31.3 applications?

Reply: Yes, except as noted in para. A323.4.2.


Subject: ASME B31.3-2002, Para. 300.1.1, Content and Coverage


File: 06-1197

Question: Does compliance of a piping component with the requirements of ASME B31.9 assurecompliance with the requirements of ASME B31.3?

Reply: No.

I-12



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Subject: ASME B31.3-2004, Para. A302.2.4, Pressure Allowances for Nonmetallic Piping


File: 07-502

Question: Does ASME B31.3-2004 provide an allowance for surge pressure above the hydrostaticdesign stress for thermoplastic piping?

Reply: No.


Subject: ASME B31.3-2004, Para. 304.7.2, Pressure Design of Unlisted Components


File: 07-504

Question: Does ASME B31.3-2004 provide an approach for designing a hub clamp connector?

Reply: Yes. See either para. 318 or para. 300(c)(3).


Subject: ASME B31.3-2004, Para. 302.3.5(e) and Appendix A, Weld Joint Strength ReductionFactor, W


File: 07-505

Question: In accordance with ASME B31.3, para. 302.3.5(e), may the weld joint strength reductionfactor, W, be taken as 1.0 when applicable testing shows the weld joint has creep-rupture strengththat is equal to or greater than the base material at the design temperature?

Reply: Yes.


Subject: ASME B31.3-2004, Para. 345.2.3(c), Leak Testing of Closure Welds


File: 07-508

Question (1): If a piping system is divided into subassemblies with each subassembly testedin accordance with para. 345.1, and reassembled as a piping system, do the connecting weldsneed to be tested in accordance with para. 345.1?

Reply (1): See Interpretation 20-07.

Question (2): In accordance with ASME B31.3-2004, if an integrally reinforced branch connectionutilizes a threaded and socket weld outlet combination as an unvalved hydrostatic vent anddrain, and the piping system is tested in accordance with para. 345.1, does the socket weldingof the test plugs need to be tested in accordance with para. 345.1?

Reply (2): Yes, unless the provisions of para. 345.2.6 apply.

I-13



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Subject: ASME B31.3-2006, Para. 302.3.4, Table 302.3.4, and Table A1-B, Weld Joint Quality Factor


File: 07-1356

Question: Is it acceptable to increase the joint quality factor of Table 302.3.4, No. 4, by additionalexamination (i.e., 100% radiography)?

Reply: No.


Subject: ASME B31.3-2006, Para. 304.1.1(b), Pressure Design of Straight Pipe, Maximum andNominal Thread Depth


File: 07-1357

Question: In accordance with ASME B31.3-2006, when a threaded component in accordancewith ASME B1.20.1 is specified, should the value of 0.02 in. be added to the nominal value of hfor inclusion with factor c of para. 304.1.1, eq. (2)?

Reply: No.


Subject: ASME B31.3-2006, Para. 304.3.3, Reinforcement of Welded Branch Connections


File: 07-1358

Question: In accordance with ASME B31.3-2006, para. 304.3.3(a), may Tb for use in calculatingL4, d2, and A3 be based on the thickness of the reinforcing barrel if the thickness of the reinforcingbarrel is not uniform within the L4 limit?

Reply: No; however, see paras. 304.3.1(c) and 300(c)(3).


Subject: ASME B31.3-2006, Fig. 323.2.2B, Reduction in Minimum Design Metal TemperatureWithout Impact Testing


File: 07-1359

Question: Shall the pressures coincident with the metal temperatures under consideration beused in determining the stress ratio as defined in the General Notes of Fig. 323.2.2B?

Reply: Yes.

I-14



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Subject: ASME B31.3-2006, Paras. 321.1.4(c) and 323.2.2(d), Piping Support Materials


File: 07-1360

Question: Does ASME B31.3-2006 address specific impact test requirements for pipe supportingelements?

Reply: No. See para. 321.1.4(a), which requires materials to be suitable for the service conditions.


Subject: ASME B31.3-2004, Para. 345.2.2, Leak Testing, Other Test Requirements


File: 07-1361

Question (1): Is it permissible to use a pump to maintain system test pressure during the testingperiod?

Reply (1): Yes.

Question (2): How much pressure drop is acceptable during a hydrostatic leak test?


Question (3): Is there a maximum test pressure allowed during the pressure testing period?

Reply (3): No; however, see paras. 345.2.1(a) and 345.4.2.


Subject: ASME B31.3-2004, Table 323.2.2, A-4(b), Impact Testing of Weld Metal and HeatAffected Zone


File: 07-1362

Question: If one or more of the three exceptions for impact testing of weld metal deposits inaustenitic stainless steel, as stated in clause A-4(b) of Table 323.2.2, are satisfied, is impact testingof the weld metal and HAZ required for cases where the design minimum temperature is below−29°C (−20°F)?

Reply: No.

I-15



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Subject: ASME B31.3-2004, Table 341.3.2, Acceptance Criteria for Welds — Internal Protrusions


File: 07-1363

Question (1): Does B31.3-2004 address the effect on process flow by internal protrusions ingroove welds?

Reply (1): No.

Question (2): Does Table 341.3.2 define the imperfection where one edge of a groove is leftunconsumed at the root without internal misalignment as incomplete penetration?

Reply (2): No.

Question (3): In accordance with Criterion Value Notes for Table 341.3.2, Symbol E for Tw > 6mm (1⁄4 in.), is the multiplication factor 1.5 applicable for aligned porosity length and clusteredporosity length?

Reply (3): Yes.


Subject: ASME B31.3-2006, Para. 302.2.4, Allowances for Pressure and Temperature Variations


File: 07-1397

Question: In accordance with ASME B31.3-2006, does para. 302.2.4(f)(1)(b) apply when theoverpressure in a system in Normal Fluid Service is less than or equal to 20%?

Reply: Yes, provided the other requirements of para. 302.2.4 are met.


Subject: ASME B31.3-2006, Para. 331, Heat Treatment Requirements


File: 07-1398

Question: For API 5L double submerged arc welded (DSAW) pipe with a wall thickness greaterthan 3⁄4 in., do all welds (e.g., circumferential and longitudinal) require postweld heat treatmentto meet the requirements of ASME B31.3?

Reply: Yes, except as provided for in para. 331.1.1.

I-16



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Subject: ASME B31.3-2004, Appendix M and Para. 301.3.1, Temperature Limits for Category DFluid Service


File: 07-1482

Question: Does ASME B31.3-2004 permit a fluid service that is nonflammable, nontoxic, non-damaging to human tissues, with a design gage pressure less than 1 035 kPa, and a designtemperature between −29°C and 186°C, to be classified as a Category D fluid service, if the designminimum temperature as defined in para. 301.3.1 is below −29°C?

Reply: Yes.


Subject: ASME B31.3-2004, Para. 341.3.1(a), Examinations and Postweld Heat Treatment


File: 07-1483

Question: Does para. 341.3.1(a) require examinations be performed after the final heat treatment?

Reply: Yes.

I-17



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Introduction 1-31-61-713-0420-08

300 7-108-1719-11

300(b) 1-261-324-085-038-0910-1113-14

300(c) 3-23-44-106-03R (Vol. 7)7-058-3013-0216-1218-0919-3119-4820-0320-2020-38

300(c) [300(e)] 1-31-61-7

300.1 7-108-179-0612-2021-0721-32

300.1.1 1-471-522-263-14-196-018-019-0217-01

(a)


Fig. 300.1.1 1-81-192-267-108-17

300.1.3 [300.1.4] 1-81-161-191-263-215-09

300.1.3(d) 10-0521-22

300.2Category D Fluid 4-13

Service5-036-0119-34


1-736-018-099-02


8-0114-0317-2321-24



8-09Table 300.4 20-23301 5-11301.1 20-40301.2 2-3

7-01301.2.1 2-29

13-15301.3 2-3

17-07301.3.1 10-02

21-47


310.3.2 4-11301.5.3 4-07301.7.2 3-4302 1-32

19-03302.2 1-50302.2.1 16-18302.2.2 17-11

19-02302.2.3 19-19302.2.4 [302.2.3] 1-3

1-322-143-44-117-017-048-0414-0917-1220-0320-2220-5121-45

302.2.5 13-15302.3 20-25302.3.2 1-18

1-382-163-138-2511-0516-0419-3719-38

302.3.4 2-2017-14

Table 302.3.4 1-421-782-203-1120-3421-0621-37

302.3.5 1-201-502-142-15



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



302.3.5 (Cont’d)2-243-44-104-126-03R (Vol. 7)6-077-047-058-1615-1516-1117-0417-1818-1620-0221-34

Table 302.3.5 16-10302.3.6 1-50

2-152-162-1719-1820-0220-4920-50

302.4 1-20303 6-05304.1.1 1-42

1-541-7013-0715-0615-1016-1421-38

304.1.2 1-421-571-681-702-1110-2021-13

304.2 15-14304.2.1 21-13304.2.2 18-06304.2.3 1-22

5-11Fig. 304.2.3 1-22304.3 1-21

1-465-016-09

304.3.1 19-33304.3.2 4-05304.3.3 4-03

7-028-068-37

(b)


304.3.3 (Cont’d)11-1012-0514-1015-0517-2621-39

Fig. 304.3.3 8-37304.3.4 1-21

1-371-551-752-27

Fig. 304.3.4 1-70304.3.5 12-13304.5 3-4

9-0710-1419-12

304.5.1 8-1820-12

304.5.1(b) 9-10304.7.2 1-51

3-24-055-055-116-0910-710-1110-1812-0913-0213-0313-0513-1119-2920-2620-3721-0221-34

304.7.4 1-16305.2 3-8

3-9305.2.1 1-38305.2.3 6-01

7-0321-29

306.4 12-16306.4.2 11-03308.2.1 5-12308.2.4 5-12311.2.4 6-02

6-05311.2.5 10-04312 9-07314 20-48314.2.1 2-22


Table 314.2.1 8-3311-16

315.2 3-6315.3 3-6317.2 1-17318 8-13318.2.2 19-45319.1.1 20-48319.2.1 2-17

20-45319.2.3 7-04

7-0512-0618-13

319.3.1 19-4021-09

319.3.1(b) 15-2421-16

319.3.2 21-26319.3.5 4-10319.3.6 1-6

1-71-552-245-1513-05

Table 319.3.6 9-01319.4.1 1-33

13-14319.4.4 1-71

2-72-24

319.7 1-167-05

321.1.1 6-07321.1.4 1-49

19-3621-41

322.3 17-24322.6.1 10-10

12-18322.6.3 1-32

2-212-297-0112-0414-09

323.1 19-28323.1.1 8-19

17-09R (Vol. 18)19-41

323.1.2 1-111-151-482-16-068-078-1911-03



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



323.1.2 (Cont’d)15-0417-0117-0819-27

323.2 3-9323.2.1 1-13323.2.2 15-12

15-2519-0719-2119-3519-3919-4720-1520-31

Fig. 323.2.2 14-0820-1320-1521-2821-40

Table 323.2.2 [Table 1-12323.2.1]

1-481-651-762-193-84-014-1514-1215-1115-1617-09R (Vol. 18)18-1220-3121-0121-43

323.2.4 6-06323.3 1-76

5-1320-14

Table 323.3.1 [Table 1-12323.3.2]

1-764-175-195-218-2910-0211-1215-2320-1020-3121-18

323.3.2 11-12323.3.4 8-30323.3.5 2-9

(c)


Table 323.3.5 5-14323.4 15-03323.4.2 10-01

10-19Table 326.1 1-11

1-512-38-078-3419-14

328 7-0212-1220-39

328.1 12-07328.2 [327.5] 1-66

11-0914-1320-19

328.2.1 [327.5.1, 327.5.2] 1-764-178-2919-2220-1920-43

328.2.2 20-19328.2.2(g) 14-05328.2.2(i) 19-26328.2.3 15-19

18-08328.4 13-01328.4.2 and Fig. 328.4.2 12-10328.4.3 14-04Fig. 328.4.4 8-28

9-08328.5 [327.4] 5-09328.5.1 [327.4.1] 5-17328.5.2 [327.4.2] 5-12

16-0619-20

Fig. 328.5.2 [Fig. 327.4.2] 1-285-126-026-058-2715-0819-1620-01

328.5.3 20-05328.5.4 [327.4.4] 1-59

1-742-104-034-147-088-1310-0413-1121-02


Fig. 328.5.4 [Fig. 327.4.4] 1-591-744-034-167-08

328.6 2-18330 8-21330.1 8-23Table 330.1.1 9-05331 8-12

20-3921-46

331.1.1 8-089-0514-0119-15

Table 331.1.1 [Table 1-69331.3.1]

2-25-068-249-0312-1414-1617-0120-4421-1221-19

331.1.2 8-05331.1.3 [331.3.6] 1-39

1-594-065-069-0311-0614-0115-1817-1317-2118-0219-24

331.1.4 [331.1.2] 5-08331.1.6 [331.3.4] 5-08

16-09331.1.7 [331.3.2] 1-78

8-22331.2 18-04331.2.2 [331.1.1] 1-39

1-78331.3.4 8-05331.3.7 8-05332.1 8-03

19-04332.2 [329.1] 1-23

1-534-028-20

332.2.2 16-08



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



332.4 [329.3, 330.2] 2-219-04

332.4.2 11-0315-17

335.1.1 15-0717-25

335.2 2-5335.2.3 17-20

21-14Fig. 335.3.3(a) 20-36340.2 [336.1.2] 1-26340.3 [336.3] 1-10

10-03340.4 [336.2] 1-31

17-1520-33

341 10-1615-1319-4921-17

341.1.4.1 21-20341.2 [336.1.1, 336.1.3] 1-10

1-261-272-2810-03

341.3.1 [336.5] 1-642-419-1521-48

341.3.2 8-3221-44

Fig. 341.3.2 [Fig. 327.4.1] 5-0913-16

Table 341.3.2 14-0214-0714-1516-0717-0317-2218-0720-1620-2020-34

[Table 327.4.1A] 1-11-91-141-412-85-045-135-165-175-185-206-047-06

(d)


[Table 341.3.2A] 8-328-389-0411-0811-1412-2213-16

341.3.3 14-14341.3.4 [336.5, 336.5.4] 1-62

2-252-323-53-1410-0910-1211-0211-0413-1216-0116-0216-0518-01

341.4 [336.5] 1-241-453-125-2011-0121-23

341.4.1 [336.5.1] 1-101-261-271-602-122-283-73-124-125-108-028-108-2610-0310-1711-1111-1411-1518-1419-0519-4220-0920-3421-04

341.4.2 8-38341.4.3 8-10

20-09341.5 8-38341.5.1 [336.6.1] 1-5

3-1220-34


342 15-21342.1 [336.4.1] 2-28

21-05343 [336.4.1] 2-28344 [336.4] 5-09

16-1318-1120-42

344.1 13-12344.2 [336.4.2] 2-28

8-108-2611-1115-2118-17

344.2.1 19-17344.2.2 21-20344.5 [336.4.5] 1-10

1-602-12

344.5.1 20-3420-41

344.6 [336.4.6] 1-60344.6.2 10-17344.7 [336.4.7] 2-28

3-1412-0119-17

344.7.1 11-1121-20

345 [337] 1-21-722-313-38-3116-0317-3019-2319-3019-4920-1721-11

345.1 [337.1] 1-41-304-046-088-1512-2120-2421-36

345.2.2 8-3120-4618-1020-4721-42

345.2.3 20-0720-1120-2420-27



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



345.2.3(c) 21-10345.2.3(i) 17-28

20-37345.2.4 [337.4.3] 1-35345.2.5 19-44345.2.6 [337.1] 1-2

5-2219-2320-06

345.3 [337.3] 2-63-105-0212-03

345.3.1 20-28345.4 8-04

19-25345.4.1 12-19345.4.2 [337.4.1] 1-35

1-611-632-234-049-0913-1318-0319-1020-46

345.4.3 [337.4.2] 1-63345.5 [337.4.4] 1-35

1-436-0811-0713-0619-32

345.5.2 11-19345.5.4 12-02

20-46345.7 [337.5.2] 1-36345.8 [337.6] 1-25

3-1017-0219-0620-18

345.9 [337.5.1] 4-095-076-088-1510-1512-0112-2115-0217-0517-1018-1520-18

345.9.1 20-0620-43

A302.2.3 20-30A302.2.4 21-33

(e)


A304 8-14A304.1.1 14-17

14-18A304.5.1 1-67A304.7.2 13-08A305 11-17A314 8-33A322.6 17-29A323.4.2 10-06

11-1821-3021-31

Table A326.1 20-30A327.2.4 7-09A328 21-15A328.2(a) 10-8A328.2.1 8-14

18-05A328.2.5 17-06A328.5 8-14

10-0813-08

K300 20-09K300(a) 17-16K303 20-21K304.1.2 11-21

14-11K314.2 17-19K315 7-07K322.3 7-07K323.1.2 19-09K323.1.5 21-03Table K323.3.1 20-41


3-6M323.1.3 3-7M326 2-13M335.3.3 20-36M335.4 [M335.5, M335.6] 3-6M341.4 [M336.5] 1-24

1-4520-09

M341.4.1 [M336.5.1] 2-283-7

M345 20-47M345.1 6-08MA306.5 9-02MA313 21-21


MA323.4 9-0219-08



1-181-291-381-481-772-13-83-93-134-124-136-016-067-038-118-188-258-348-3611-1312-0915-0119-4319-4620-2920-3221-28

Table A-1B [Table 1] 1-782-204-187-03

Appendix B 19-13Appendix D 1-6

1-71-341-461-551-561-712-72-244-165-015-156-0612-0812-1112-1713-05



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Appendix D (Cont’d)18-18


5-1019-20

Appendix F [F323.2] 1-29Appendix F, F323 20-20Appendix F, FA323.4 20-30

(f)


Appendix G 5-12

Appendix H 8-06

11-10

Appendix J 1-28

1-54

1-75

5-04


Appendix M 6-018-0920-23

Appendix V 17-17Appendix X, X3.1.3 12-23Appendix X, X3.2.2 13-09Appendix X, X302.2.3 15-22Case 137 3-1Case 141 1-51



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SUBJECT INDEX



1-91-141-412-85-095-135-175-185-206-047-068-3212-2213-1614-0214-07



3-138-118-2510-1315-01

for ASTM A 312 1-29for ASTM A 351 11-13for ASTM A 387 8-25for ASTM A 464 8-11for ASTM A 570 1-38for ASTM A 587 1-13for ASTM A 671 1-48for austenitic stainless 3-13


pipe




Bellows 13-09

(g)


Bending 4-028-0315-1716-08


diameter








2-276-09




8-3712-0512-1314-1015-0521-39

weld requirements 2-104-034-14



7-027-0810-0413-1117-26


Buckles 1-231-53



5-0321-47



9-0220-23


9-0212-15



7-10B31.3 versus B31.9 21-32buried piping 21-07cryogenic piping 21-22fired heaters 15-09general hydrocarbon 6-01


21-24



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Code Coverage (Cont’d)intent 16-12later editions 19-01new and replacement 5-22

piping12-2119-49





defining 17-2320-11




5-10







20-40


Displacement Stress 2-142-2412-0618-1321-09

(h)





5-1811-0121-0421-23






1-451-622-122-324-1211-15

records 11-1121-20

required 1-241-606-0411-1411-1515-1315-2118-1421-17





Examination)









Fatigue 18-09


FittingsB16.9 1-7

5-0119-1420-21



MSS SP-75 1-11



3-49-7



metallic



21-16



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1-565-01


2-24


12-0812-17






12-1512-1615-03



8-09


onset




19-04for carbon steel pipe 21-12for flared laps 11-03for valve parts 8-12governing thickness 1-39

1-594-065-0611-06

(i)


Heat Treatment (Cont’d)heating rate 1-69local 5-08

8-05monitoring 5-08

8-05postweld 20-39

20-44requirements 8-08

8-218-238-249-039-0512-1414-0114-1615-1818-0421-4621-48


required2-4


Impact Tests


11-1218-1220-10


heat treatment required 5-19in qualifying procedures 8-29of aluminum filler metals 2-19of austenitic stainless steel 1-65of bolting materials 4-15of duplex stainless steel 20-13of heat-affected zone 1-76


1-651-765-2119-2121-19

requirements 15-2317-0920-3121-18


Impact Tests (Cont’d)temperature limitation 5-14

8-3014-1219-0719-4321-0121-2821-43




5-135-165-20



2-86-04






welds3-118-0617-1420-34



3-10instrument tubing 7-07special 8-13tapered pipe thread 16-15threaded 11-16

17-1920-48



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15-2216-03

alternative 4-095-076-088-1512-0112-2117-0517-1018-1520-18






pressure4-04


of discharge piping 1-72of joints 20-28of newly constructed 1-4

systems5-025-228-1520-24




3-105-23


11-1912-0213-0619-2319-3019-3220-17

preparation for 2-63-105-025-2312-03

(j)


Leak Tests (Cont’d)reduced pressure 1-61

(hydrostatic test)2-2313-1320-17

requirements 8-1513-13

sensitive 1-2517-0219-0619-23



19-10time 20-46

21-1121-42

welds 20-0620-0720-3521-1021-36




3-6




2-43-93-116-016-06

API 5LX 2-411-05

ASTM A 234 2-20ASTM A 312 1-29

1-772-20

ASTM A 350 19-07ASTM A 351 11-13ASTM A 387 8-25


Materials (Cont’d)ASTM A 403 1-77


8-0213-1021-03



17-11notch sensitive 2-22notes 20-29reidentification 8-19toughness requirements 5-19traceability 19-28unlisted material 11-05

11-2015-0417-0117-0819-27


Miter Bends

pressure design of 1-225-11

Near Straight Sawtooth Runs

explanation of 1-33

Nomenclature

d 1-54T 1-28TW 5-04

5-16tn 1-75



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8-14materials 19-08

20-3021-3021-31

pressure design 14-1714-1821-33



2-144-11

loads 1-502-152-162-1719-1820-4920-5021-08


2-305-2219-11




20-04curved and mitered 15-14

segments18-06

elbowless 8-03in corroded condition 2-15instrument 17-24made from plate 1-48


14-09pressure testing 9-09

(k)


Pipe (Cont’d)spiral welded 7-03straight, under internal 10-20

pressure11-2114-11

types 20-27










20-0320-5121-3321-45




13-1519-12


components14-18

of pipe 1-421-541-571-681-702-1111-2113-0715-0615-1017-0621-38


Pipe (Cont’d)of listed components 16-14

16-18of unlisted components 13-02

13-0313-0521-34

of valves 8-0413-15


20-22


2-2919-41



7-0112-04



Pressure-Temperature 5-05Rating

8-34






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1-451-622-122-323-12


11-0111-0512-03




2-4


8-0210-0321-03






11-10limits of 2-27

9-04



inspection17-15

Safeguarding 5-12


(l)




changematerial 21-29spiral welded pipe 7-03



8-02valves 5-05

8-048-07



19-3819-4620-32



16-0416-1120-02


1-502-152-244-104-126-03R

(Vol.7)

6-077-058-1617-1818-16

reduction factors 16-1021-34



2-246-03R

(Vol.7)


5-15for tees 1-46

1-551-715-0112-0812-17


12-11


20-03bending 16-08design minimum 10-02

temperature14-0814-1215-1115-1617-0719-35


5-1415-1215-2519-47


reduction 4-1120-15


verification 16-09



17-2118-02




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3-6


20-0920-42

requirements 10-17


1-513-64-055-058-710-1810-0710-1112-0913-0213-0313-0519-0319-1920-2520-3721-34





8-2613-16

requirements 2-2810-0313-1618-17

(m)


Washers, Use of 2-5


17-2218-0721-44

bevels 12-10configuration 19-16definition 14-03


11-0111-1413-1614-1414-1515-0219-1719-4220-0620-43

fillet size 1-7410-1916-0620-01


4-034-148-3711-1019-25




longitudinal 2-203-114-18


14-04qualification of position 1-66


Weld (Cont’d)reinforcement 7-08

11-08repair 2-18

21-19socket 6-02

6-0510-1915-0816-0619-20

spacing of 7-02types 20-05

20-07


by others 15-1918-0819-26

requirements 17-27

Welding Procedure

qualification of 1-12

1-65

1-66

1-76

4-17

8-23

8-29

11-09

14-05

14-13

19-22

responsibility 12-07

12-12

specification 8-21

8-22

20-14

20-19

20-31



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Replies to Technical InquiriesNovember 1, 2003 through October 31, 2005

GENERAL INFORMATION







I-1



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Allowances With Owner’s Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-22 B31-05-45Appendix A, Note (76) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-29 B31-05-388Appendix A, Table A-1, 321 Stainless Steel Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . 20-32 B31-05-405Applicability of Ultrasound Testing for Heavy Thick Piping . . . . . . . . . . . . . . . . . . 20-09 B31-04-00497Chapter VIII, Piping for Category M Fluid Service. . . . . . . . . . . . . . . . . . . . . . . . . . . 20-23 B31-05-107Chapter IX, Thickness Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-41 B31-05-1209Clarification of Seamless Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-04 B31-04-00414Combining Displacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-45 B31-05-1213Coverage of Ozone Gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-08 B31-04-00496Design Stress for Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-12 B31-04-01129Duration of Occasional Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-50 B31-05-1307Examination and Quality Factor for Longitudinal Welds . . . . . . . . . . . . . . . . . . . . . 20-34 B31-05-455Fig. 323.2.2B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-13 B31-04-01130Figs. 328.5.2B and 328.5.2C, Slip-On and Socket Welds . . . . . . . . . . . . . . . . . . . . . . . 20-01 B31-03-01912Hydrostatic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-47 B31-05-1223Interpretation 17-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-43 B31-05-1211Minimum Thickness for Test Blanks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-17 B31-04-01293Para. 300(c)(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-38 B31-05-1142Paras. 300.1.1(b), 300(c)(4), 300(c)(5), 345.1, and 345.8, Vacuum Box

Testing of Piping Field Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18 B31-04-01294Para. 301.1(c) and (d) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-40 B31-05-1208Para. 302.2.4, Allowances for Pressure and Temperature Variations . . . . . . . . . . . . 20-03 B31-04-00412Para. 302.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-51 B31-05-1308Para. 302.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-25 B31-05-179Para. 302.3.5, Limits on Calculated Stresses Due to Sustained Loads and

Displacement Strains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-02 B31-03-01915Para. 304.7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-26 B31-05-180Para. 304.7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-37 B31-05-1141Para. 314, Threaded Joints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-48 B31-05-1305Para. 323.2.2, Lower Temperature Limits, Listed Materials . . . . . . . . . . . . . . . . . . . . 20-15 B31-04-01207Para. 323.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-31 B31-05-404Paras. 328.2.1 and 328.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-19 B31-03-1913Para. 328.5.3, Seal Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-05 B31-04-00416Para. 328.5.4, Welded Branch Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-11E B31-94-037Para. 331 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-39 B31-05-1147Para. 340.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-33 B31-05-454Para. 345.2.2, Visual Examination of Fillet Weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-35 B31-05-477Para. 345.2.2(a), Examination for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-46 B31-05-1222Para. 345.2.3, Piping Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-11 B31-04-00499Para. 345.2.3, Piping Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-24 B31-05-157,

B31-05-319Para. 345.2.3, Piping Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-27 B31-05-328Para. 345.2.3(c), Testing of Closure Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-07 B31-04-00438Paras. 345.2.6 and 345.9.1(b), Leak Testing and Examination of Welds. . . . . . . . . . 20-06 B31-04-00417Para. 345.3.1, Hydrostatic Testing of Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-28 B31-05-329Para. K303, Use of B16.9 Buttwelding Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-21 B31-05-34Paras. M314.2.2 and M335.3.3, and Fig. 335.3.3(a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-36 B31-05-786Performing Digital Radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-42 B31-05-1210PWHT Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-44 B31-05-1212Qualifying the Heat Input for Impact Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-14 B31-04-01131Table 323.3.1, Welding Procedure Qualified Thickness Range and HAZ Impact

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-10 B31-04-00498Table 341.3.2, Radiography Acceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-16 B31-04-01250Table 341.3.2, Radiography Acceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-20 B31-04-1250Table A326.1, Applicability of ASTM F 1281, F 1282, and F 1974. . . . . . . . . . . . . . . 20-30 B31-05-391Use of Sh for Occasional Stress Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-49 B31-05-1306

I-2



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Interpretation: 13-11E

Subject: ASME B31.3-1993 Edition, Para. 328.5.4, Welded Branch Connections

Date Issued: November 21, 1994

File: B31-94-037

Question: In accordance with ASME B31.3-1993 Edition, Addenda a, what is the effective weldthroat thickness required for a proprietary integrally reinforced branch connection fitting?

Reply: The thickness is as required by the manufacturer’s design qualified in accordance withpara. 304.7.2 or MSS SP-97 and para. 328.5.4(d)

Note: In the Reply, the cross-reference to MSS SP-97 has been corrected by errata.


Subject: ASME B31.3-2002 Edition, Figs. 328.5.2B and 328.5.2C, Slip-On and Socket Welds


File: B31-03-01912

Question (1): In accordance with ASME B31.3-2002 Edition, is the 1⁄16 in. approximate gapshown in Fig. 328.5.2B and Fig. 328.5.2C required to be present before any welding, includingtack welding?

Reply (1): Yes; also see interpretations 6-02, question (1); 10-19; and 16-06.

Question (2): In accordance with ASME B31.3-2002 Edition, can radiography be used to ascertainthe “1⁄16 in. approximate gap before welding” shown in Fig. 328.5.2B and Fig. 328.5.2C?

Reply (2): The Code does not specify or restrict the methodology to determine this dimension.


Subject: ASME B31.3-2002 Edition, Para. 302.3.5, Limits on Calculated Stresses Due to SustainedLoads and Displacement Strains


File: B31-03-01915

Question (1): In accordance with ASME B31.3-2002 Edition, para. 302.3.5(c), shall sustainedload stresses be evaluated separately from the displacement stress ranges of para. 302.3.5(d)?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002 Edition, para. 302.3.6(a), shall sustainedplus occasional load stresses be evaluated separately from the displacement stress ranges of para.302.3.5(d)?

Reply (2): Yes.

I-3



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Subject: ASME B31.3-2002 Edition, Para. 302.2.4, Allowances for Pressure and Temperature Varia-tions


File: B31-04-00412

Question (1): In accordance with ASME B31.3-2002 Edition, does para. 302.2.4 apply to pressuretransients caused by water hammer?

Reply (1): Yes.

Question (2): In a fluid transient due to water hammer, there can be many pressure cycles inthe piping response. In accordance with ASME B31.3-2002 Edition, must all cycles in which thepressure exceeds the pressure rating or the calculated pressure stress exceeds the allowable stressbe considered with respect to the 1,000 cycle limit in para. 302.2.4(d)?

Reply (2): Yes.

Question (3): In accordance with ASME B31.3-2002 Edition, may the number of cycles of thevariation exceed 1,000 if justified by a more rigorous analysis in accordance with para. 300(c)(3)?

Reply (3): Yes.


Subject: ASME B31.3-2002 Edition, Clarification of Seamless Pipe


File: B31-04-00414

Question: In accordance with ASME B31.3-2002 Edition, can a seamless pipe that has been cutlongitudinally and reassembled by welding be considered as seamless pipe for the purpose ofdetermining the weld joint quality factor?

Reply: No.


Subject: ASME B31.3-2002 Edition, Para. 328.5.3, Seal Welds


File: B31-04-00416

Question: Does ASME B31.3-2002 Edition, para. 328.5.3, address sealing a threaded connectionby brazing?

Reply: No.

I-4



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Subject: ASME B31.3-1999 Edition, Paras. 345.2.6 and 345.9.1(b), Leak Testing and Examinationof Welds


File: B31-04-00417

Question: Does ASME B31.3-1999 Edition require 100% liquid penetrant or magnetic particleexamination of the seal welds applied at hydrostatic test vents and drains after the acceptanceof hydrostatic test results?

Reply: No.


Subject: ASME B31.3-2002 Edition, Para. 345.2.3(c), Testing of Closure Welds


File: B31-04-00438

Question (1): In accordance with ASME B31.3-2002 Edition, if piping subassemblies meetthe requirements specified in para. 345.2.3(c), are there any fluid service limitations to pipingsubassemblies for which closure welds are performed?

Reply (1): No.

Question (2): Does ASME B31.3-2002 Edition permit a completed piping system, consisting ofpiping subassemblies, to have more than one closure weld if all subassemblies have been testedin accordance with para. 345.2.3 and all closure welds are examined in accordance with para.345.2.3(c)?

Reply (2): Yes.


Subject: ASME B31.3-2002 Edition, Coverage of Ozone Gas


File: B31-04-00496

Question: Does ASME B31.3-2002 Edition provide coverage for ozone gas piping?

Reply: Yes; see the Introduction of ASME B31.3.


Subject: ASME B31.3-2002 Edition, Applicability of Ultrasound Testing for Heavy Thick Piping


File: B31-04-00497

Question (1): In accordance with ASME B31.3-2002 Edition, is ultrasonic examination an accept-able substitute for radiography for a piping system utilizing Class 2500 components that hasbeen classified as high pressure piping in accordance with para. K300?

Reply (1): No; see para. K341.4.2(b).

Question (2): In accordance with ASME B31.3-2002 Edition, is ultrasonic examination an accept-able substitute for radiography for a piping system utilizing Class 2500 components if the systemhas not been classified as high pressure piping in accordance with para. K300?

Reply (2): Yes; see paras. 341.4.1(b)(1), 341.4.3(b), and M341.4(b)(1).

I-5



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Subject: ASME B31.3-2002 Edition, Table 323.3.1, Welding Procedure Qualified Thickness Rangeand HAZ Impact Location


File: B31-04-00498

Question (1): In accordance with ASME B31.3-2002 Edition, when a material with a pipe wallthickness of 1⁄2 in. requires impact testing per the requirements of para. 323.3, is the qualifiedbase metal thickness range for production welding, per A-5(a) of Table 323.3.1, 1⁄4 to 3⁄4 in.?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002 Edition, may the one required set of threeHAZ (CVN) impact specimens, per the requirements of A-4, A-5, and 6 of Table 323.3.1, be takenat any depth location of the pipe wall thickness?

Reply (2): Yes.


Subject: ASME B31.3-2002 Edition, Para. 345.2.3, Piping Subassemblies


File: B31-04-00499

Question: In accordance with ASME B31.3-2002 Edition, para. 345.2.3, may a component beconsidered a piping subassembly?

Reply: Yes.


Subject: ASME B31.3-2002 Edition, Design Stress for Bolts


File: B31-04-01129

Question: Does ASME B31.3-2002 Edition specify what loads to consider when calculating abolt stress to compare to the design stress values for bolting materials?

Reply: No, except for flanges; see para. 304.5.1.

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Subject: ASME B31.3-2002 Edition, Fig. 323.2.2B


File: B31-04-01130

Question (1): Does ASME B31.3, Fig. 323.2.2B, provide a basis for the use of impact-testedcarbon steels at a Minimum Design Metal Temperature (MDMT) colder than the impact testtemperature, provided the stress ratio defined in Fig. 323.2.2B is less than 1 and the MDMT isnot colder than −104°C (−155°F)?

Reply (1): Yes.

Question (2): Does ASME B31.3 permit Fig. 323.2.2B to be used to provide a basis for the useof impact-tested duplex stainless steels, UNS S31803, impact tested at −46°C (−50°F), in the samemanner as described in question (1)?

Reply (2): No.


Subject: ASME B31.3-2002 Edition, Qualifying the Heat Input for Impact Testing


File: B31-04-01131

Question: Does ASME B31.3-2002 Edition require that all the requirements of ASME BPV Code,Section IX, be complied with for a WPS requiring impact testing?

Reply: Yes.


Subject: ASME B31.3-2002 Edition, Para. 323.2.2, Lower Temperature Limits, Listed Materials


File: B31-04-01207

Question: Does ASME B31.3 permit a temperature reduction calculated in accordance with Fig.323.2.2B to be applied for carbon steels covered in 323.2.2(a) that have a minimum temperaturelisted in Table A-1?

Reply: Yes.


Subject: ASME B31.3-2002 Edition, Table 341.3.2, Radiography Acceptance Criteria


File: B31-04-01250

Question: In accordance with ASME B31.3-2002 Edition, when 100% radiographic examinationand no further acceptance criteria are specified for Normal Fluid Service, is it required thatthe acceptance criteria for severe cyclic conditions as noted in Table 341.3.2 be applied to theexamination?

Reply: No, the requirements of Normal Fluid Service apply.

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Subject: ASME B31.3-2002 Edition, Minimum Thickness for Test Blanks


File: B31-04-01293

Question (1): Does ASME B31.3-2002 Edition address required thickness for blanks or closuresinstalled only for a pneumatic or hydrostatic leak test?

Reply (1): No.

Question (2): Does ASME B31.3-2002 Edition address required thickness for permanent blanksand closures?

Reply (2): Yes.


Subject: ASME B31.3-1996 Edition, Paras. 300.1.1(b), 300(c)(4), 300(c)(5), 345.1, and 345.8, VacuumBox Testing of Piping Field Welds


File: B31-04-01294

Question (1): Does ASME B31.3-1996 Edition permit performing the Alternative Leak Testmethod in accordance with para. 345.9 in lieu of hydrostatic or pneumatic testing for NormalFluid Service piping that does not satisfy the conditions of para. 345.1(c)?

Reply (1): No.

Question (2): In accordance with ASME B31.3-1996 Edition, para. 345.8, is it acceptable toperform a leak test in accordance with BPV Code, Section V, Article 10, Appendix II, BubbleTest — Vacuum Box Technique?

Reply (2): Yes, provided it has a demonstrated sensitivity of not less than 10-3 atm-ml/sec.

Question (3): In accordance with ASME B31.3-1996 Edition, para. 345.8, if leak testing inaccordance with BPV Code, Section V, Article 10, Appendix II, Bubble Test — Vacuum BoxTechnique, is it acceptable to test piping with a 60 psig or greater design pressure at less than15 psi differential pressure?

Reply (3): No.

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Subject: ASME B31.3-2002 Edition, Paras. 328.2.1 and 328.2.2


File: B31-03-1913

Question (1): Does ASME B31.3-2002 Edition, para. 328.2.1, by referencing BPV Code SectionIX, permit the use of Standard Welding Procedure Specifications, compliant with the requirementsof BPV Code, Section IX, Article V, in ASME B31.3 applications?

Reply (1): Yes, if they satisfy all the requirements of ASME B31.3, including the qualificationrequirements in para. 328.2.

Question (2): Does ASME B31.3-2002 Edition, para. 328.2.2 apply to Standard Welding ProcedureSpecifications compliant with the requirements of BPV Code, Section IX, Article V?

Reply (2): No.

Question (3): In accordance with ASME B31.3-2002 Edition, do the rules of “discreet demonstra-tion” of BPV Code, Section IX, Article V comply with the requirements of para. 328.2.2(i)?

Reply (3): No.


Subject: ASME B31.3-2002 Edition, Table 341.3.2, Radiography Acceptance Criteria


File: B31-04-1250

Question: Does ASME B31.3-2002 Edition require more stringent examination acceptance criteriafor sour and hydrogen service designated as Normal Fluid Service than for other services desig-nated as Normal Fluid Service?

Reply: No. See paras. 300(c)(5) and F323.


Subject: ASME B31.3-2002 Edition, Para. K303, Use of B16.9 Buttwelding Fittings


File: B31-05-34

Question: In accordance with ASME B31.3-2002 Edition, may an ASME B16.9 fitting for whichthe design pressure has been established by proof testing in accordance with ASME B16.9 beused in Chapter IX service?

Reply: Yes, provided the requirements of Table K326.1, Note (2) are met.

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Subject: Allowances With Owner’s Approval


File: B31-05-45

Question (1): With the owner’s approval, as described in ASME B31.3-1999 Edition, para.302.2.4(f)(1), is it permissible to exceed the pressure rating or the allowable stress for pressuredesign at temperature as described in para. 302.2.4(f)(1)(a) when the variation is self-limiting(e.g., due to a pressure relieving event)?

Reply (1): Yes.

Question (2): Does ASME B31.3-1999 Edition, para. 302.2.4(f)(2), permit exceeding the pressurerating or the allowable stress for pressure design at the temperature at the increased conditionwithout owner’s approval?

Reply (2): Yes.


Subject: ASME B31.3-2002 Edition, Chapter VIII, Piping for Category M Fluid Service


File: B31-05-107

Question (1): If an ASME BPV Code Section VIII vessel has been determined to be in “lethalsubstance” service, must the attached B31.3 piping system be classified as Category M FluidService?

Reply (1): No; see para. 300(b)(1).

Question (2): Is Appendix M of B31.3 mandatory?

Reply (2): No; see Table 300.4. However, see the definition of fluid service in para. 300.2.

Question (3): Is the Code user responsible for considering applicable items in Appendix M?

Reply (3): Yes; see Note (2) of Table 300.4.


Subject: ASME B31.3-1998 Addenda to 1996 Edition, and B31.3-2002 Edition, Para. 345.2.3, PipingSubassemblies


File: B31-05-157 and B31-05-319

Question (1): Does ASME B31.3-2002 Edition define “subassemblies” the same way as it defines“piping components”?

Reply (1): No.

Question (2): In accordance with ASME B31.3c-1998 Addenda and ASME B31.3-2002 Edition,does para. 345.2.3(a) allow piping components to be independently tested as required by para.345.1, and then assembled and placed into service with no additional leak testing?

Reply (2): No, unless the system is assembled with flanged joints or closure welds as describedin paras. 345.2.3(b) and (c).

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Subject: ASME B31.3-2002 Edition, Para. 302.3


File: B31-05-179

Question: Does ASME B31.3-2002 Edition establish a preference in the selection of listed versusunlisted components?

Reply: No.


Subject: ASME B31.3-2002 Edition, Para. 304.7.2


File: B31-05-180

Question: Does ASME B31.3-2002 Edition, para. 304.7.2, require calculations consistent withthe design criteria of the Code be performed and that these calculations be substantiated bymeans of (a), (b), (c), or (d)?

Reply: Yes.


Subject: ASME B31.3-2002 Edition, Para. 345.2.3, Piping Subassemblies


File: B31-05-328

Question: Does the ASME B31.3-2002 Edition definition of a piping subassembly require thatit be in the installed position?

Reply: No.


Subject: ASME B31.3-2002 Edition, Para. 345.3.1, Hydrostatic Testing of Pipe


File: B31-05-329

Question: In accordance with ASME B31.3-2002 Edition, can buried pipe be leak tested withoutvisual examination of joints?

Reply: No, unless the joints have been previously tested. See para. 345.3.1.


Subject: ASME B31.3-2002 Edition, Appendix A, Note (76)


File: B31-05-388

Question: Does Note (76) apply only to the materials for which Note (76) is specified inTable A-1?

Reply: Yes.

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Subject: ASME B31.3-2002 Edition, Table A326.1, Applicability of ASTM F 1281, F 1282, and F 1974


File: B31-05-391

Question: Does ASME B31.3-2002 Edition allow the use of products meeting ASTM F 1281, F1282, and F 1974 in compressed gas service?

Reply: Yes. See para. A302.2.3 and Appendix F, para. FA323.4(b).




File: B31-05-404

Question (1): For welded (with filler metal added) austenitic stainless steel pipe or fittingmaterial intended for service with a minimum design metal temperature that is warmer thanthe minimum temperature allowed by Table A-1 but colder than −20°F, do the requirements ofblock A-4(b) of Table 323.2.2 apply?

Reply (1): Yes.

Question (2): If it is required that the stainless steel pipe or fitting manufacturer conduct impacttests of the weld metal deposits, may the provisions of Note (2) of Table 323.2.2, allowing impacttests performed as part of the weld procedure qualification, be used to fully satisfy all the impacttest requirements of para. 323.2.2?

Reply (2): Yes.

Question (3): If the stainless steel pipe or fitting manufacturer uses the impact tests performedas part of the weld procedure qualification to satisfy all the provisions of para. 323.2.2, do theprovisions of block A-1 of Table 323.3.1 apply?

Reply (3): No.

Question (4): For austenitic stainless steel applications in ASME B31.3, are manufacturer’swelding procedure specifications and procedure qualifications necessary for any specificationswelded with filler metal?

Reply (4): No.

Question (5): When welding procedure specifications and procedure qualifications that includequalification of the welding procedure by impact testing are produced by the manufacturer whenproducing austenitic stainless steel weld pipe or fittings, may those procedure specifications andqualifications be used to satisfy the requirements of Table 323.2.2?

Reply (5): Yes.

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Subject: ASME B31.3-2002 Edition, Appendix A, Table A-1, 321 Stainless Steel Stresses


File: B31-05-405

Question (1): Should the allowable stress for A 403 WP321 fittings conforming to ASME B16.9,such as elbows and tees, be per A 312 TP321 pipe?

Reply (1): No.

Question (2): Should the wall thickness for seamless fittings conforming to ASME B16.9, manu-factured to A 403 WP321, be calculated based on the allowable stress value for A 403 WP321material?

Reply (2): Yes.


Subject: ASME B31.3-2002 Edition, Para. 340.4


File: B31-05-454

Question (1): In accordance with ASME B31.3-2002 Edition, para. 340.4, do the qualificationrequirements of the owner’s inspector apply to the individual designated as the owner’s inspector?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002 Edition, para. 340.4(b), do the qualificationrequirements of the owner’s inspector apply to the organization employing the inspector?

Reply (2): No.


Subject: ASME B31.3-2002 Edition, Examination and Quality Factor for Longitudinal Welds


File: B31-05-455

Question (1): In accordance with ASME B31.3-2002 Edition, if single butt longitudinal weldsmade as part of pipe fabrication are visually examined per para. 341.4.1(a)(3) and examined perpara. 341.4.1(b), does a joint factor, Ej, of 0.80 apply?


Question (2): In accordance with ASME B31.3-2002 Edition, if single butt longitudinal weldsmade as part of pipe fabrication are visually examined per para. 341.4.1(a)(3), examined per para.341.4.1(b), and radiographed per para 341.5.1(a), does a joint factor, Ej, of 0.90 apply?


Question (3): In accordance with ASME B31.3-2002 Edition, if single butt longitudinal weldsmade as part of pipe fabrication are visually examined per para. 341.4.1(a)(3) and 100% radio-graphed per para. 344.5.1 and Table 341.3.2, does a joint factor, Ej, of 1.00 apply?


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Subject: ASME B31.3-2002 Edition, Para. 345.2.2, Visual Examination of Fillet Weld


File: B31-05-477

Question: Does ASME B31.3-2002 Edition require, when a structural attachment is fillet weldedon one side, that the opposite side of the structural attachment be left exposed for examinationduring leak testing?

Reply: No. See also interpretation 19-23.


Subject: ASME B31.3-2004 Edition, Paras. M314.2.2 and M335.3.3, and Fig. 335.3.3(a)


File: B31-05-786

Question (1): In accordance with ASME B31-3-2004 Edition, may straight thread, O-ring styleconnection fittings be used in Category M fluid service?

Reply (1): Yes, provided that they meet the requirements of the Code, including para. M314.2.2and para. M335.3.3.

Question (2): In accordance with ASME B31.3-2004 Edition, is demonstrating leak tightnesssufficient to qualify use of fittings such as those shown in Fig. 335.3.3(a) for use in Category MFluid Service?

Reply (2): No.




File: B31-05-1141

Question (1): When qualifying unlisted components for pressure design using ASME B31.3-2004Edition, para. 304.7.2(d), using the rules of BPVC Section VIII-1, UG-101, may the designer makeanalogies among related materials in accordance with para. 304.7.2(e)?

Reply (1): Yes.

Question (2): Does ASME B31.3-2004 Edition define related materials as used in para. 304.7.2(e)?

Reply (2): No.


Subject: ASME B31.3-2004 Edition, Para. 300(c)(3)


File: B31-05-1142

Question: In accordance with ASME B31.3-2004 Edition, may a designer apply a more rigorousanalysis to qualify a design that deviates from specific requirements of the Code?

Reply: Yes. See para. 300(c)(3).

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Subject: ASME B31.3-2004 Edition, Para. 331


File: B31-05-1147

Question (1): In accordance with ASME B31.3-2004 Edition, are the longitudinal seams ofwelded seam pipe and seams in welded seam fittings subject to the postweld heat treatmentrequirements of para. 331?

Reply (1): Yes, provided the welds are made in accordance with para. 328.

Question (2): In accordance with ASME B31.3-2004 Edition, do the postweld heat treatmentrequirements of para. 331 apply to listed components?

Reply (2): No, unless otherwise required by the notes for Appendix A or specified in theengineering design.


Subject: ASME B31.3-2002 Edition, Paras. 301.1(c) and (d)


File: B31-05-1208

Question (1): In accordance with ASME B31.3-2002 Edition, does the successful completion ofan engineering program that is equivalent to 2 years of full-time study meet the engineeringassociate’s degree requirement of para. 301.1(c)?

Reply (1): Yes.

Question (2): Does the “experience in the design of related pressure piping” requirement inpara. 301.1(d) differ from the requirements in paras. 301.1(a), (b), and (c)?

Reply (2): No.

Question (3): Does ASME B31.3-2002 Edition address the initiation of experience in para. 301.1?

Reply (3): No.


Subject: ASME B31.3-2002 Edition, Chapter IX, Thickness Limitations


File: B31-05-1209

Question: In accordance with ASME B31.3-2002 Edition, when qualifying a welding procedurefor High Pressure Fluid Service, does the range of material thicknesses specified in Table K323.3.1apply to determine the number of impact test pieces required?

Reply: Yes.

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Subject: ASME B31.3-2004 Edition, Performing Digital Radiography


File: B31-05-1210

Question: In accordance with ASME B31.3-2004 Edition, para. 344, is the use of digital radiogra-phy permitted?

Reply: Yes, provided the methodology meets the requirements of para. 344.5.1.


Subject: ASME B31.3, Interpretation 17-10


File: B31-05-1211

Question: In accordance with ASME B31.3-2002 Edition, has the Code been changed to supersedethe response to inquiry 17-10?

Reply: Interpretation 17-10 applies to ASME B31.3-1997 Edition, Addendum b. Subsequently,the Code was revised to reflect the present wording.


Subject: ASME B31.3-2004 Edition, PWHT Requirements


File: B31-05-1212

Question: In accordance with ASME B31.3-2004 Edition, Table 331.1.1, for P-No. 1 material,can a weld procedure qualified to ASME Section IX that has a weld joint thickness range from0.0625 in. to 2.00 in. be used without postweld heat treatment for a butt groove weld joint witha thickness greater than 3⁄4 in.?

Reply: No; see para. 328.2.1(c).


Subject: ASME B31.3-2004 Edition, Combining Displacements


File: B31-05-1213

Question (1): In accordance with ASME B31.3-2004 Edition, are strains caused by cyclic supportdisplacements during seismic events considered to be externally imposed displacements in accor-dance with para. 319.2.1(c)?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2004 Edition, shall externally imposed displace-ment strains, excluding single cycle events, be considered in conjunction with thermal displace-ment strains?

Reply (2): Yes; see para. 319.2.1(d).

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Subject: ASME B31.3-2002 Edition, Para. 345.2.2(a), Examination for Leaks


File: B31-05-1222

Question: In accordance with ASME B31.3-2002 Edition, does the 10 min minimum hold timereferenced in para. 345.2.2 apply to both hydrostatic leak test in accordance with para. 345.4.2and pneumatic leak test in accordance with para. 345.5.4?

Reply: Yes.


Subject: ASME B31.3-2004 Edition, Hydrostatic Testing


File: B31-05-1223

Question: In accordance with ASME B31.3-2004 Edition, are both a sensitive leak test and ahydrostatic, pneumatic, or hydrostatic-pneumatic leak test required for Category M piping?

Reply: Yes; see para. M345.


Subject: ASME B31.3-2004 Edition, Para. 314, Threaded Joints


File: B31-05-1305

Question (1): Does ASME B31.3-2004 Edition advise against using the relative motion of threadedconnections (i.e., to screw and unscrew some fraction of a turn) to provide flexibility for thermalexpansion?

Reply (1): Yes. See para. 314.1(c).

Question (2): Does ASME B31.3-2004 Edition prohibit the practice of using the relative motionof threaded connections to provide flexibility for thermal expansion?

Reply (2): No, provided the relative motion does not cause leakage at the joint, as required bypara. 319.1.1.


Subject: ASME B31.3-2004 Edition, Use of Sh for Occasional Stress Evaluation


File: B31-05-1306

Question: In accordance with ASME B31.3-2004 Edition, when a piping system operates atmultiple sets of coincident operating temperatures and pressures, and the system may at anyrandom moment be loaded with an occasional load such as earthquake, wind, or pressure relief,should all coincident operating pressures and temperatures expected during operation be consid-ered and shall the basic allowable stress used in para. 302.3.6 be based on the applicable tempera-ture for each condition?

Reply: Yes.

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Subject: ASME B31.3-2002 Edition, Duration of Occasional Loads


File: B31-05-1307

Question: Does ASME B31.3-2002 Edition address the duration of a load in qualifying the loadas being occasional in para. 302.3.6?

Reply: No.




File: B31-05-1308

Question: In accordance with ASME B31.3-2004 Edition, para. 302.2.4(f)(1)(a), is the 33% over-pressure allowance for no more than 10 hr at any one time and no more than 100 hr/yr applicableto pressure relieving events?

Reply: Yes, provided all other applicable requirements of para. 302.2.4 are met.

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NUMERICAL INDEXCode references are based on ASME B31.3-1990 or later Editions. References in brackets are to previous Editionsand Addenda.


Introduction 1-31-61-713-0420-08

300 7-108-1719-11

300(b) 1-261-324-085-038-0910-1113-14

300(c) 3-23-44-106-03R (Vol. 7)7-058-3013-0216-1218-0919-3119-4820-0320-2020-38

300(c) [300(e)] 1-31-61-7

300.1 7-108-179-0612-20

300.1.1 1-471-522-263-14-196-018-019-0217-01

Fig. 300.1.1 1-81-192-26

(a)


Fig. 300.1.1 (Cont’d)7-108-17

300.1.3 [300.1.4] 1-81-161-191-263-215-09

300.1.3(d) 10-05300.2

Category D Fluid 4-13Service

5-036-0119-34


1-736-018-099-02

notch-sensitive 2-22owner 2-30piping components 3-2

8-0114-0317-23



8-09Table 300.4 20-23301 5-11301.1 20-40301.2 2-3

7-01301.2.1 2-29

13-15301.3 2-3

17-07301.3.1 10-02310.3.2 4-11301.5.3 4-07301.7.2 3-4302 1-32


302 (Cont’d)19-03

302.2 1-50302.2.1 16-18302.2.2 17-11

19-02302.2.3 19-19302.2.4 [302.2.3] 1-3

1-322-143-44-117-017-048-0414-0917-1220-0320-2220-51

302.2.5 13-15302.3 20-25302.3.2 1-18

1-382-163-138-2511-0516-0419-3719-38

302.3.4 2-2017-14

Table 302.3.4 1-421-782-203-1120-34

302.3.5 1-201-502-142-152-243-44-104-126-03R (Vol. 7)6-07



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302.3.5 (Cont’d)7-047-058-1615-1516-1117-0417-1818-1620-02

Table 302.3.5 16-10302.3.6 1-50

2-152-162-1719-1820-0220-4920-50

302.4 1-20303 6-05304.1.1 1-42

1-541-7013-0715-0615-1016-14

304.1.2 1-421-571-681-702-1110-20

304.2 15-14304.2.2 18-06304.2.3 1-22

5-11Fig. 304.2.3 1-22304.3 1-21

1-465-016-09

304.3.1 19-33304.3.2 4-05304.3.3 4-03

7-028-068-3711-1012-0514-1015-0517-26

Fig. 304.3.3 8-37304.3.4 1-21

1-371-551-75

(b)


304.3.4 (Cont’d)2-27

Fig. 304.3.4 1-70304.3.5 12-13304.5 3-4

9-0710-1419-12

304.5.1 8-1820-12

304.5.1(b) 9-10304.7.2 1-51

3-24-055-055-116-0910-710-1110-1812-0913-0213-0313-0513-1119-2920-2620-37

304.7.4 1-16305.2 3-8

3-9305.2.1 1-38305.2.3 6-01

7-03306.4 12-16306.4.2 11-03308.2.1 5-12308.2.4 5-12311.2.4 6-02

6-05311.2.5 10-04312 9-07314 20-48314.2.1 2-22Table 314.2.1 8-33

11-16315.2 3-6315.3 3-6317.2 1-17318 8-13318.2.2 19-45319.1.1 20-48319.2.1 2-17

20-45319.2.3 7-04

7-0512-06


319.2.3 (Cont’d)18-13

319.3.1 19-40319.3.1(b) 15-24319.3.5 4-10319.3.6 1-6

1-71-552-245-1513-05

Table 319.3.6 9-01319.4.1 1-33

13-14319.4.4 1-71

2-72-24

319.7 1-167-05

321.1.1 6-07321.1.4 1-49

19-36322.3 17-24322.6.1 10-10

12-18322.6.3 1-32

2-212-297-0112-0414-09

323.1 19-28323.1.1 8-19

17-09R (Vol. 18)19-41

323.1.2 1-111-151-482-16-068-078-1911-0315-0417-0117-0819-27

323.2 3-9323.2.1 1-13323.2.2 15-12

15-2519-0719-2119-3519-3919-4720-1520-31

Fig. 323.2.2 14-08



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Fig. 323.2.2 (Cont’d)20-1320-15

Table 323.2.2 [Table 1-12323.2.1]

1-481-651-762-193-84-014-1514-1215-1115-1617-09R (Vol. 18)18-1220-31

323.2.4 6-06323.3 1-76

5-1320-14

Table 323.3.1 [Table 1-12323.3.2]

1-764-175-195-218-2910-0211-1215-2320-1020-31

323.3.2 11-12323.3.4 8-30323.3.5 2-9Table 323.3.5 5-14323.4 15-03323.4.2 10-01

10-19Table 326.1 1-11

1-512-38-078-3419-14

328 7-0212-1220-39

328.1 12-07328.2 [327.5] 1-66

11-0914-1320-19

328.2.1 [327.5.1, 327.5.2] 1-764-178-2919-22

(c)


328.2.1 [327.5.1, 327.5.2] (Cont’d)20-1920-43

328.2.2 20-19328.2.2(g) 14-05328.2.2(i) 19-26328.2.3 15-19

18-08328.4 13-01328.4.2 and Fig. 328.4.2 12-10328.4.3 14-04Fig. 328.4.4 8-28

9-08328.5 [327.4] 5-09328.5.1 [327.4.1] 5-17328.5.2 [327.4.2] 5-12

16-0619-20

Fig. 328.5.2 [Fig. 327.4.2] 1-285-126-026-058-2715-0819-1620-01

328.5.3 20-05328.5.4 [327.4.4] 1-59

1-742-104-034-147-088-1310-0413-11

Fig. 328.5.4 [Fig. 327.4.4] 1-591-744-034-167-08

328.6 2-18330 8-21330.1 8-23Table 330.1.1 9-05331 8-12

20-39331.1.1 8-08

9-0514-0119-15

Table 331.1.1 [Table 1-69331.3.1]

2-25-068-249-0312-1414-16


Table 331.1.1 [Table 331.3.1] (Cont’d)17-0120-44

331.1.2 8-05331.1.3 [331.3.6] 1-39

1-594-065-069-0311-0614-0115-1817-1317-2118-0219-24

331.1.4 [331.1.2] 5-08331.1.6 [331.3.4] 5-08

16-09331.1.7 [331.3.2] 1-78

8-22331.2 18-04331.2.2 [331.1.1] 1-39

1-78331.3.4 8-05331.3.7 8-05332.1 8-03

19-04332.2 [329.1] 1-23

1-534-028-20

332.2.2 16-08332.4 [329.3, 330.2] 2-2

19-04332.4.2 11-03

15-17335.1.1 15-07

17-25335.2 2-5335.2.3 17-20Fig. 335.3.3(a) 20-36340.2 [336.1.2] 1-26340.3 [336.3] 1-10

10-03340.4 [336.2] 1-31

17-1520-33

341 10-1615-1319-49

341.2 [336.1.1, 336.1.3] 1-101-261-272-2810-03

341.3.1 [336.5] 1-642-4



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



341.3.1 [336.5] (Cont’d)19-15

341.3.2 8-32Fig. 341.3.2 [Fig. 327.4.1] 5-09

13-16Table 341.3.2 14-02

14-0714-1516-0717-0317-2218-0720-1620-2020-34

[Table 327.4.1A] 1-11-91-141-412-85-045-135-165-175-185-206-047-06

[Table 341.3.2A] 8-328-389-0411-0811-1412-2213-16

341.3.3 14-14341.3.4 [336.5, 336.5.4] 1-62

2-252-323-53-1410-0910-1211-0211-0413-1216-0116-0216-0518-01

341.4 [336.5] 1-241-453-125-2011-01

341.4.1 [336.5.1] 1-101-261-271-60

(d)


341.4.1 [336.5.1] (Cont’d)2-122-283-73-124-125-108-028-108-2610-0310-1711-1111-1411-1518-1419-0519-4220-0920-34

341.4.2 8-38341.4.3 8-10

20-09341.5 8-38341.5.1 [336.6.1] 1-5

3-1220-34

342 15-21342.1 [336.4.1] 2-28343 [336.4.1] 2-28344 [336.4] 5-09

16-1318-1120-42

344.1 13-12344.2 [336.4.2] 2-28

8-108-2611-1115-2118-17

344.2.1 19-17344.5 [336.4.5] 1-10

1-602-12

344.5.1 20-3420-41

344.6 [336.4.6] 1-60344.6.2 10-17344.7 [336.4.7] 2-28

3-1412-0119-17

344.7.1 11-11345 [337] 1-2

1-722-313-38-31


345 [337] (Cont’d)16-0317-3019-2319-3019-4920-17

345.1 [337.1] 1-41-304-046-088-1512-2120-24

345.2.2 8-3120-4618-1020-47

345.2.3 20-0720-1120-2420-27

345.2.3(i) 17-2820-37

345.2.4 [337.4.3] 1-35345.2.5 19-44345.2.6 [337.1] 1-2

5-2219-2320-06

345.3 [337.3] 2-63-105-0212-03

345.3.1 20-28345.4 8-04

19-25345.4.1 12-19345.4.2 [337.4.1] 1-35

1-611-632-234-049-0913-1318-0319-1020-46

345.4.3 [337.4.2] 1-63345.5 [337.4.4] 1-35

1-436-0811-0713-0619-32

345.5.2 11-19345.5.4 12-02



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



345.5.4 (Cont’d)20-46

345.7 [337.5.2] 1-36345.8 [337.6] 1-25

3-1017-0219-0620-18

345.9 [337.5.1] 4-095-076-088-1510-1512-0112-2115-0217-0517-1018-1520-18

345.9.1 20-0620-43

A302.2.3 20-30A304 8-14A304.1.1 14-17

14-18A304.5.1 1-67A304.7.2 13-08A305 11-17A314 8-33A322.6 17-29A323.4.2 10-06

11-18Table A326.1 20-30A327.2.4 7-09A328.2(a) 10-8A328.2.1 8-14

18-05A328.2.5 17-06A328.5 8-14

10-0813-08

K300 20-09K300(a) 17-16K303 20-21K304.1.2 11-21

14-11K314.2 17-19K315 7-07K322.3 7-07K323.1.2 19-09Table K323.3.1 20-41Table K326.1 20-21K328.2.1(a) 17-27Fig. K328.5.4 8-37K341.4.2 20-09M305.1 12-15M307.2 8-35M314.2.2 20-36M322.3 2-13

(e)


M322.3 (Cont’d)3-6

M323.1.3 3-7

M326 2-13

M335.3.3 20-36

M335.4 [M335.5, M335.6] 3-6

M341.4 [M336.5] 1-24

1-45

20-09

M341.4.1 [M336.5.1] 2-28

3-7

M345 20-47

M345.1 6-08

MA306.5 9-02

MA323.4 9-02

19-08



1-181-291-381-481-772-13-83-93-134-124-136-016-067-038-118-188-258-348-3611-1312-0915-0119-4319-4620-2920-32

Table A-1B [Table 1] 1-782-204-18


Table A-1B [Table 1] (Cont’d)7-03

Appendix B 19-13

Appendix D 1-6

1-7

1-34

1-46

1-55

1-56

1-71

2-7

2-24

4-16

5-01

5-15

6-06

12-08

12-11

12-17

13-05

18-18

Appendix E [Appendix 1-44K]

5-10

19-20

Appendix F [F323.2] 1-29

Appendix F, F323 20-20

Appendix F, FA323.4 20-30

Appendix G 5-12

Appendix H 8-06

11-10

Appendix J 1-28

1-54

1-75

5-04

Appendix M 6-01

8-09

20-23

Appendix V 17-17

Appendix X, X3.1.3 12-23

Appendix X, X3.2.2 13-09

Appendix X, X302.2.3 15-22

Case 137 3-1

Case 141 1-51



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---


SUBJECT INDEX



1-91-141-412-85-095-135-175-185-206-047-068-3212-2213-1614-0214-07



3-138-118-2510-1315-01



pipe




Bellows 13-09

Bending 4-02

(f)


Bending (Cont’d)8-0315-1716-08


diameter



for plastic pipingrequirements 18-05solvent cement 8-14


Bolting Materials 4-1517-2020-12


2-276-09




8-3712-0512-1314-1015-05

weld requirements 2-104-034-147-027-0810-04



13-1117-26


Buckles 1-231-53



5-03radiographic examination 8-38


9-0220-23

double contained piping 8-35fittings 20-36leak test 6-08liquid oxygen 8-09requirements 8-35

9-0212-15



7-10fired heaters 15-09general hydrocarbon 6-01

servicein-line sensing devices 8-01intent 16-12later editions 19-01new and replacement 5-22

piping12-2119-49




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Code Coverage (Cont’d)synfuel plant piping (Cont’d)




defining 17-2320-11


12-16in-line sensing devices 8-01listed 20-25metric size 19-29referenced standards 1-44

5-10





considerationscalculations 20-26conditions 2-3for stainless bellows 12-23Lame theory 1-57minimum temperature 10-02qualification 20-38

20-40


Displacement Stress 2-142-2412-0618-13




5-18

(g)


Examination (Cont’d)extent of (Cont’d)

11-01in-process 3-14

11-15liquid penetrant (see Liquid

Penetrant Examination)progressive (see Progressive



1-451-622-122-324-1211-15

records 11-11required 1-24

1-606-0411-1411-1515-1315-2118-14





Examination)


internal pipingfor interconnecting piping 1-19listed in scope 10-5





Fatigue 18-09



FittingsB16.9 1-7

5-0119-1420-21



MSS SP-75 1-11

Flammable Service 1-17


3-49-7



metallic

Flexibility Analysisbranch connections 9-01exemptions from 1-33qualification 13-05




1-565-01


2-24


12-0812-17







--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Fluid Service (Cont’d)definition (Cont’d)


12-1512-1615-03

requirements, nonmetallic 11-1711-18


8-09


onset




19-04for flared laps 11-03for valve parts 8-12governing thickness 1-39

1-594-065-0611-06


8-05monitoring 5-08

8-05postweld 20-39


8-218-238-249-039-0512-1414-0114-1615-1818-04


required

(h)


Heat Treatment (Cont’d)when radiography is required (Cont’d)

2-4


Impact Testsabsorbed energy data 2-9alternative methods 8-30base metal 4-01

11-1218-1220-10


heat treatment required 5-19in qualifying procedures 8-29of aluminum filler metals 2-19of austenitic stainless steel 1-65of bolting materials 4-15of duplex stainless steel 20-13of the heat-affected zone 1-76

5-21of weldments 1-12

1-651-765-2119-21


temperature limitation 5-148-3014-1219-0719-43




5-135-165-20



2-86-04


Instrument Piping 7-07


Instrument Piping (Cont’d)8-01




welds3-118-0617-1420-34




17-1920-48



15-2216-03

alternative 4-095-076-088-1512-0112-2117-0517-1018-1520-18






pressure



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Leak Tests (Cont’d)minimum hydrostatic test pressure(Cont’d)

4-04minor repairs and 1-2

additionsof discharge piping 1-72of joints 20-28of newly constructed 1-4

systems5-025-228-1520-24




3-105-23


11-1912-0213-0619-2319-3019-3220-17

preparation for 2-63-105-025-2312-03


2-2313-1320-17


sensitive 1-2517-0219-0619-23



19-10time 20-46welds 20-06

20-35


(i)




3-6




2-43-93-116-016-06

API 5LX 2-411-05

ASTM A 234 2-20ASTM A 312 1-29

1-772-20

ASTM A 350 19-07ASTM A 351 11-13ASTM A 387 8-25ASTM A 403 1-77


8-0213-10



17-11notch sensitive 2-22notes 20-29reidentification 8-19toughness requirements 5-19traceability 19-28unlisted material 11-05


Materials (Cont’d)unlisted material (Cont’d)

11-2015-0417-0117-0819-27



5-11



5-16tn 1-75




8-14materials 19-08

20-30pressure design 14-17

14-18



2-144-11

loads 1-502-152-162-1719-1820-4920-50


2-305-2219-11




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Owner’s Inspector (Cont’d)qualifications of (Cont’d)



20-04curved and mitered 15-14

segments18-06



14-09pressure testing 9-09spiral welded 7-03straight, under internal 10-20

pressure11-2114-11

types 20-0820-27

Pipe Supportsconfigurations 6-07longitudinal stress effects 7-05materials 19-36use of plastic 1-49








20-0320-51




(j)


Pressure Design (Cont’d)of flanges and blanks (Cont’d)

13-1519-12


components14-18

of pipe 1-421-541-571-681-702-1111-2113-0715-0615-1017-06


of unlisted components 13-0213-0313-05

of valves 8-0413-15


20-22


2-2919-41



7-0112-04




8-34








1-451-622-122-323-12


11-0111-0512-03




2-4


8-0210-03


of examinations 11-11of hardness tests 8-22retention of 1-10



11-10limits of 2-27



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Reinforcement, Branch (Cont’d)limits of (Cont’d)

9-04



inspection17-15

Safeguarding 5-12




changespiral welded pipe 7-03



8-02valves 5-05

8-048-07



19-3819-4620-32



16-0416-1120-02


(k)


Stresses (see also Allowable Stresses)(Cont’d)

longitudinal (Cont’d)1-502-152-244-104-126-03R

(Vol.7)

6-077-058-1617-1818-16

reduction factors 16-10


2-246-03R

(Vol.7)


5-15for tees 1-46

1-551-715-0112-0812-17


12-11


20-03bending 16-08design minimum 10-02

temperature14-0814-1215-1115-1617-0719-35


5-1415-1215-25


Temperatures (Cont’d)limitations (Cont’d)

19-47maximum metal 19-40

temperaturereduction 4-11

20-15variation in elevated 17-17

temperature serviceverification 16-09



17-2118-02




3-6


20-0920-42

requirements 10-17


1-513-64-055-058-710-1810-0710-1112-0913-0213-0313-0519-0319-1920-2520-37




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---






8-2613-16

requirements 2-2810-0313-1618-17

Washers, Use of 2-5


17-2218-07



11-0111-1413-1614-1414-1515-02

(l)


Weld (Cont’d)examination of welds (Cont’d)

19-1719-4220-0620-43

fillet size 1-7410-1916-0620-01


4-034-148-3711-1019-25

imperfections (seeAcceptable Criteria)




11-08repair 2-18socket 6-02

6-0510-1915-0816-06


Weld (Cont’d)socket (Cont’d)

19-20spacing of 7-02types 20-05

20-07

Welder Qualificationby others 15-19

18-0819-26

requirements 17-27

Welding Procedurequalification of 1-12

1-651-661-764-178-238-2911-0914-0514-1319-22


specification 8-218-2220-1420-1920-31



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

ASME B31.3 CASES

B31 CASE 178Providing an Equation for Longitudinal Stress for Sustained Loads in ASME B31.3 Construction

Approval Date: May 6, 2005This Case shall expire on May 1, 2008, unless previously annulled or reaffirmed.

Inquiry: ASME B31.3 provides a description fordetermining SL for sustained loads. Is there an equationthat may be used?

Reply: It is the opinion of the committee that, in theabsence of more applicable data and in accordance withpara. 302.3.5(c), the following equation may be used tocalculate SL for sustained loads:

SL p �(|Sa| + Sb)2 + (2St)2

where the definitions in para. 319.4.4 apply andSa p stress due to axial loads1

p Fa/ApFa p longitudinal force due to pressure,2 weight, and

other sustained loadingsAp p cross-sectional area considering nominal pipe

thickness less the sum of the mechanical (thread

1 In the absence of more applicable data, Sa and St need not beintensified.

2 Fa includes the longitudinal force due to pressure P � Ai forpiping systems that contain no expansion joints, where Ai p � �d2/4 and d is the pipe inside diameter considering pipe wall thick-ness less allowances. For piping systems with expansion joints, itis the responsibility of the designer to determine the longitudinalforce due to the pressure in the piping system.

C-1

or groove depth), corrosion, and erosion allow-ances

Sb p resultant, intensified bending stress3 due topressure, weight, and other sustained loadings

p�(IiMi)2 + (IoMo)2

Z

Ii p in-plane sustained stress index.4 In the absenceof more applicable data, Ii is taken as the greaterof 0.75ii or 1.00.

Io p out-plane sustained stress index.4 In theabsence of more applicable data, Io is taken asthe greater of 0.75io or 1.00.

St p torsional stress3 due to pressure, weight, andother sustained loadings1

p Mt/2Z

3 Z shall be based on the nominal section, less the sum of themechanical (thread or groove depth), corrosion, and erosion allow-ances.

4 It is the responsibility of the designer to determine Ii and Io; incases where these indices are based on stress intensification factors,it is the responsibility of the designer to determine ii and io for allcomponents not explicitly addressed in Appendix D (e.g., elbows/bends/miters other than 90 deg, base-ells, reducing elbows,crosses, etc.).



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

ASME B31.3INTERPRETATIONS NO. 19

Replies to Technical InquiriesApril 1, 2001 through October 31, 2003

General Information

It has been agreed to publish interpretations issued by the B31 Committee concerning B31.3as part of the update service to the Code. The interpretations have been assigned numbers inchronological order. Each interpretation applies to the Edition stated in the interpretation, or ifnone is stated, to the Edition in effect on the date of issuance of the interpretation. Subsequentrevisions to the Code may have superseded the reply. These interpretations are not part of theCode.

These replies are taken verbatim from the original letters, except for a few typographical andeditorial corrections made for the purpose of improved clarity. In some instances, a review ofthe interpretation revealed a need for corrections of a technical nature. In these cases, a revisedreply bearing the original interpretation number with the suffix R is presented.



Numerical and Subject Indexes


I-1



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

B31.3

Subject Interpretation File No.

Para. 300, General Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-11 B31-02-02436Paras. 300(c)(3) and 304.7.2, Radiographic Survey Plugs . . . . . . . . . . . . . . . . . . . . . . 19-48 B31-03-01455Para. 300(c)(5), Gas Pressure Reducing Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-31 B31-03-00062Para. 300.2, Definition of Fluid Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-34 B31-03-00437Para. 302, Unlisted Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-03 B31-01-037Para. 302.2.2, Pressure Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-02 B31-01-036Para. 302.2.3, Unlisted Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-19 B31-02-03075Para. 302.3.2(a)(3), Bases for Design Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-37 B31-03-00694Para. 302.3.2(d), Bases for Design Stresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-38 B31-03-00734Para. 302.3.6, Limits of Calculated Stress Due to Occasional Loads . . . . . . . . . . . . 19-18 B31-02-03074Para. 304.3.1(a)(2), Branch Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-33 B31-03-00429Para. 304.5, Pressure Design of Flanges and Blanks . . . . . . . . . . . . . . . . . . . . . . . . . . 19-12 B31-02-02440Para. 304.7.2, Metric Size Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-29 B31-02-04110Para. 318.2.2, Mechanical Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-45 B31-03-01345Para. 319.3.1(a), Thermal Expansion Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-40 B31-03-00829Para. 321.1.4(e), Piping Support Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-36 B31-03-00482Para. 322.6.3, Reference to BPV Section VIII, Division 1, Para. UG-128 . . . . . . . . . 19-41 B31-03-00827Para. 323.1, Materials and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-28 B31-02-04056Para. 323.1.2, Unlisted Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-27 B31-02-03884Para. 323.2.2, Lower Temperature Limits, Listed Materials . . . . . . . . . . . . . . . . . . . . 19-07 B31-01-048Para. 323.2.2, Lower Temperature Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-47 B31-03-01347Table 323.2.2, Requirements for Low Temperature Toughness Tests for

Metals and Para. 323.3, Impact Testing Methods and Criteria . . . . . . . . . . . . . . . 19-21 B31-02-03629Table 323.2.2, Requirements for Low Temperature Tests for Metals . . . . . . . . . . . . 19-35 B31-03-00479Para. 323.2.2(d), Lower Temperature Limits, Listed Materials . . . . . . . . . . . . . . . . . 19-39 B31-03-00821Table 326.1, Partial Compliance ASME B16.9 Fittings. . . . . . . . . . . . . . . . . . . . . . . . . 19-14 B31-02-03069Fig. 328, Weld End Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-16 B31-02-03071Para. 328.2.1, Welding Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-22 B31-02-03631Para. 328.2.2(i), Welding Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-26 B31-02-03819Para. 328.5.2, Fillet and Socket Welds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-20 B31-02-03076Paras. 331.1.1, Heat Treatment Requirements and 341.3.1, General . . . . . . . . . . . . . 19-15 B31-02-03070Para. 331.1.3, Governing Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-24 B31-02-03634Paras. 332.1, General and 332.4, Required Heat Treatment . . . . . . . . . . . . . . . . . . . . 19-04 B31-01-038Paras. 341 and 345, Repair or Replacement of Piping. . . . . . . . . . . . . . . . . . . . . . . . . 19-49 B31-03-01441Para. 341.4.1(b)(1), Production Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-05 B31-01-039Para. 341.4.1(b)(1), Extent of Required Examination . . . . . . . . . . . . . . . . . . . . . . . . . . 19-42 B31-03-00828Paras. 344.2.1, Definition and 344.7, In-Process Examination . . . . . . . . . . . . . . . . . . 19-17 B31-02-03073Para. 345, Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-30 B31-02-04197Paras. 345, Testing and 345.2.6, Repairs or Additions After Leak Testing . . . . . . . 19-23 B31-02-03632Para. 345.2.5, Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-44 B31-03-01343Para. 345.4, Hydrostatic Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-25 B31-02-03683Para. 345.4.2, Test Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-10 B31-02-02434Para. 345.5, Pneumatic Leak Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-32 B31-03-00264Para. 345.8, Sensitive Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-06 B31-01-047Para. MA323.4, Nonmetallic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-08 B31-01-053Para. K323.1.2, Allowable Stress Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-09 B31-01-006Table A-1, Allowable Stress Values for Carbon Steel Piping . . . . . . . . . . . . . . . . . . . 19-46 B31-03-01346Table A-1, Figure 323.2.2A, Impact Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-43 B31-03-00906Appendix B, Stress Tables and Allowable Pressure Tables for Nonmetals . . . . . . . 19-13 B31-02-02441Appendix E, Later Editions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-01 B31-01-035

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19-01, 19-02, 19-03 ASME B31.3-2004


Subject: B31.3-1999 Edition (2000 Addenda), Appendix E, Later Editions

Date Issued: January 4, 2002

File: B31-01-035

Question: May later editions/addenda of a section of the ASME Boiler and Pressure VesselCode than that listed in Appendix E be used for construction in accordance with B31.3?

Reply: No, unless specified in the engineering design. See para. 300(c).


Subject: B31.3-1999 Edition (2000 Addenda), Para. 302.2.2, Pressure Ratings


File: B31-01-036

Question: May components manufactured in accordance with standards listed in Table 326.1,which state pressure-temperature ratings are based on straight seamless pipe, have their pressureratings established in accordance with para. 302.2.2?

Reply: Yes.


Subject: B31.3-1999 Edition (2000 Addenda), Para. 302, Unlisted Component


File: B31-01-037

Question: May an unlisted component, such as a clamp connector designed by the rules of theASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Appendix 24, be in a B31.3piping system?

Reply: Yes, provided that it meets all of the applicable requirements of the B31.3 Code, includingpara. 302.2.3.

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ASME B31.3-2004 19-04, 19-05


Subject: B31.3-1999 Edition (2000 Addenda), Para. 332.1, General and Para. 332.4, Required HeatTreatment


File: B31-01-038

Question (1): May pipe be bent using both hot and cold methods simultaneously on the samebend, such as might occur during the induction bending process?

Reply (1): Yes.

Question (2): For P-Nos. 3, 4, 5, 6, and 10a materials in which pipe is bent using both hot andcold methods simultaneously on the same bend (such as might occur during the induction bendingprocess), is heat treatment required after bending in accordance with para. 332.4.1?

Reply (2): Yes.

Question (3): For P-Nos. 3, 4, 5, 6, and 10a materials in which pipe is bent using both hot andcold methods simultaneously on the same bend (such as might occur during the induction bendingprocess), is heat treatment required after bending in accordance with para. 332.4.2 if none of theconditions in para. 332.4.2(a), (b), or (c) exist?

Reply (3): No; however, heat treatment would be required in accordance with para. 332.4.1.

Question (4): For materials other than P-Nos. 3, 4, 5, 6, and 10a materials in which pipe is bentusing both hot and methods simultaneously on the same bend (such as might occur during theinduction bending process), is heat treatment after bending in accordance with para. 332.4.2required if none of the conditions in paras. 332.4.2(a), (b), or (c) exist?

Reply (4): No, unless otherwise specified in the engineering design.


Subject: B31.3-1999 (2000 Addenda), Para. 341.4.1(b)(1), Production Welds


File: B31-01-039

Question: In accordance with ASME B31.3-1999 Edition, 2000 Addenda, para. 341.4.1(b)(1), doproduction welds include both shop and field welding?

Reply: Yes.

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19-06, 19-07, 19-08 ASME B31.3-2004


Subject: B31.3-1999 Edition (2000 Addenda), Para. 345.8, Sensitive Leak Test


File: B31-01-047

Question (1): In accordance with ASME B31.3-1999 Edition, Addenda (a), does the Gas andBubble Test method specified in para. 345.8 refer to the Bubble Test – Direct Pressure Techniquespecified in Boiler and Pressure Vessel Code, Section V, Article 10?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1999 Edition, Addenda (a), must the BubbleTest – Direct Pressure Technique specified in Boiler and Pressure Vessel Code, Section V, Article10 demonstrate a sensitivity of at least 10-3 atm-ml/sec to meet the requirements of a sensitiveleak test in para. 345.8?

Reply (2): No.


Subject: B31.3-1999 Edition, Para. 323.2.2, Lower Temperature Limits, Listed Materials


File: B31-01-048

Question: In accordance with ASME B31.3-1999 Edition, may ASTM A 350 LF2 material beused at temperatures below −50°F with no further impact testing?

Reply: Yes, provided that the requirements of para. 323.2.2(d) and Fig. 323.2.2B are met. Seealso para. F301.


Subject: B31.3-1999, 2000 Addenda, Para. MA323.4, Nonmetallic Materials


File: B31-01-053

Question: In accordance with ASME B31.3-1999 (2000 Addenda), does para. MA323.4 prohibitreinforced thermosetting resin (RTR) or borosilicate glass piping?

Reply: No.

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ASME B31.3-2004 19-09, 19-10


Subject: B31.3-1999 Edition (2000 Addenda), Para. K323.1.2, Allowable Stress Values


File: B31-01-006

Question: Is it the intent of ASME B31.3a-2000, para. K323.1.2 to require that the allowablestress value at design temperature for an unlisted alloy steel pipe material for a High PressureFluid Service application not exceed the lower of two-thirds of the specified minimum yieldstrength at room temperature, and two-thirds of the yield strength at temperature, in accordancewith para. K302.3.2(d)?

Reply: Yes.


Subject: B31.3-1999 Edition (2001 Addenda), Para. 345.4.2, Test Pressures

Date Issued: July 1, 2002

File: B31-02-02434

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), must the minimumhydrostatic test pressure for flanges and flanged valves be calculated in accordance with equa-tion (24)?

Reply (1): Yes, except when para. 345.4.2(c) applies.

Question (2): In accordance with ASME B31.3-1999 Edition (2001 Addenda), may the designer,owner, or end user waive the requirements of para. 345.4.2?

Reply (2): No.

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19-11, 19-12 ASME B31.3-2004


Subject: B31.3-1999 Edition and 2001 Addenda, Para. 300, General Statements


File: B31-02-02436

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), is it the responsibil-ity of the owner to establish the design requirements necessary for determining the piping designloads?

Reply (1): Yes. See para. 300(b).

Question (2): In accordance with ASME B31.3-1999 Edition (2001 Addenda), is it the responsibil-ity of the designer to determine the piping design based upon design requirements establishedby the owner?

Reply (2): Yes. See para. 300(b).

Question (3): Does the Code define the excessive and harmful effects of vibration referencedin para. 301.5.4?

Reply (3): No.

Question (4): Does para. 301.5.4 require complete elimination of vibration?

Reply (4): No.

Question (5): Does B31.3 permit the designer to determine acceptance criteria for loads andconditions where no such criteria are provided by the Code?

Reply (5): Yes, with acceptance by the owner; see para. 300(c)(3). Also see para. 300(c)(5).

Question (6): In accordance with ASME B31.3-1999 Edition (2001 Addenda), para. K323.2.4(a),when a designer uses an unlisted material, or when a listed material is to be used above thehighest temperature for which stress values appear in Appendix K, shall the designer demonstratethe validity of the allowable stresses and other design limits to the owner?

Reply (6): Yes. See para. 300(b)(2).


Subject: B31.3-1999 Edition (2001 Addenda), Para. 304.5, Pressure Design of Flanges and Blanks


File: B31-02-02440

Question (1): May an ASME B16.5 blind flange be bored and used as a lapped flange in B31.3piping systems without meeting the requirements of para. 304.5.1?

Reply (1): No.

Question (2): May a lapped flange be fabricated from plate for use in B31.3 piping systems?

Reply (2): Yes, provided the design meets the requirements of para. 304.5.1.

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ASME B31.3-2004 19-13, 19-14, 19-15


Subject: B31.3-1999 Edition (2001 Addenda), Appendix B, Stress Tables and Allowable PressureTables for Nonmetals


File: B31-02-02441

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), may hydrostaticdesign stresses (HDS) be extrapolated for temperatures outside the range listed in Appendix B?

Reply (1): No.

Question (2): In accordance with B31.3-1999 Edition (2001 Addenda), may hydrostatic designstresses (HDS) exceeding those listed in Appendix B be used for pressure design calculations?

Reply (2): Yes, if developed in accordance with paras. A302.3.2 and A323.2.1.

Question (3): In accordance with B31.3-1999 Edition (2001 Addenda), may plastic materials notlisted in Appendix B be used in pressure-containing piping components?

Reply (3): Yes. See para. A323.

Intepretation: 19-14

Subject: B31.3-1999 Edition, Table 326.1, Partial Compliance ASME B16.9 Fittings


File: B31-02-03069

Question: According to ASME B31.3-1999 Edition, may a partial compliance fitting as definedin ASME B16.9-1993 Edition be considered a listed component?

Reply: Yes, see para. 326.


Subject: B31.3-1999 Edition (2001 Addenda), Para. 331.1.1, Heat Treatment Requirements andPara. 341.3.1, General


File: B31-02-03070

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), para. 331.1.1(c) isthe term “final welds” defined?

Reply (1): No.

Question (2): In accordance with ASME B31.3-1999 Edition (2001 Addenda), para. 341.3.1, isNDE examination of piping constructed of P1 or P2 materials required to be performed afterfinal heat treatment?

Reply (2): No.

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19-16, 19-17, 19-18, 19-19 ASME B31.3-2004


Subject: B31.3-1999 Edition (2001 Addenda), Fig. 328, Weld End Configurations


File: B31-02-03071

Question: In accordance with ASME B31.3-1999 Edition (2001 Addenda), is it required that theweld end configurations be identical on both sides of the weld?

Reply: No, except that a combination of the configuration types must meet the requirementsof the WPS. See para. 328.4.2(a)(2).


Subject: B31.3-1999 Edition (2001 Addenda), Para. 344.2.1, Definition and Para. 344.7, In-ProcessExamination


File: B31-02-03073

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), does the Coderequire the examiner to be present 100% of the time during all welding operations?

Reply (1): No.

Question (2): In accordance with ASME B31.3-1999 Edition (2001 Addenda), does the Coderequire the examiner to be present 100% of the time for in-process examination described in para.344.7?

Reply (2): No, but the examiner must be present to examine points (a) through (g), as applicable,for the entire weld.


Subject: B31.3-1999 Edition (2001 Addenda), Para. 302.3.6, Limits of Calculated Stress Due toOccasional Loads


File: B31-02-03074

Question: Does para. 302.3.6(a) include occasional internal pressure loads (e.g., surges, spikes,peaks, and water hammer) in the summation of longitudinal stresses due to sustained andoccasional loads?

Reply: Yes. In addition, all pressure variations must meet the requirements of para. 302.2.4.


Subject: B31.3-1999 Edition (2001 Addenda), Para. 302.2.3, Unlisted Components


File: B31-02-03075

Question: When qualifying an unlisted component for use in a B31.3 piping system by calcula-tion under para. 302.2.3, shall the calculations be based on the B31.3 allowable stresses?

Reply: Yes.

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ASME B31.3-2004 19-20, 19-21, 19-22


Subject: B31.3-1999 Edition (2001 Addenda), Para. 328.5.2, Fillet and Socket Welds


File: B31-02-03076

Question (1): In accordance with ASME B31.3-1999 Edition (2001 Addenda), paras. 328.5.2(a)and 328.5.2(b), may a slip-on flange be welded on the face side and intermittent welded on thehub side?

Reply (1): No.

Question (2): In accordance with ASME B31.3-1999 Edition (2001 Addenda), does the Codepermit slip-on flanges to be welded on the face side, with the back side (hub side) stitch welded(intermittent welded) when qualified in accordance with para. 300(c)(3)?

Reply (2): Yes.


Subject: ASME B31.3-2002, Table 323.2.2, Requirements for Low Temperature Toughness Tests forMetals and Para. 323.3, Impact Testing Methods and Criteria


File: B31-02-03629

Question (1): In accordance with ASME B31.3-2002, if a welding procedure has been qualifiedby impact testing for service at a temperature of −49°C in accordance with para. 323.3, but thebase material and weld material were impact tested at a warmer temperature in accordance withtheir respective material specifications, may the weld procedure be used for service at temperaturesas low as −49°C?

Reply (1): Yes.

Question (2): Is it a requirement of ASME B31.3-2002 that the same brand and batch numberof material, as used in weld procedure qualification impact testing, be used for production welds?

Reply (2): No. See Note (2) of Table 323.2.2.


Subject: ASME B31.3-2002, Para. 328.2.1, Welding Qualification


File: B31-02-03631

Question: In accordance with ASME B31.3-2002, does an original WPS need to be revised toinclude any changed nonessential variable?

Reply: Yes. See para. 328.2.1 and BPV Code Section IX.

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19-23, 19-24, 19-25 ASME B31.3-2004


Subject: ASME B31.3-2002, Para. 345, Testing and Para. 345.2.6, Repairs or Additions After LeakTesting


File: B31-02-03632

Question (1): Is it the intent of ASME B31.3-2002, para. 345 that structural attachment weldsto piping be examined for leaks during hydrostatic test, pneumatic test, combination hydrostatic-pneumatic test, or sensitive leak test?

Reply (1): Yes.

Question (2): Is it the intent of ASME B31.3-2002, para. 345.2.6 that structural attachments topiping, following leak testing, be considered an “addition” that may not require retesting as longas precautionary measures are taken to assure sound construction and the owner agrees?

Reply (2): Yes, provided the additions are minor.


Subject: ASME B31.3-2002, Para. 331.1.3, Governing Thickness


File: B31-02-03634

Question: In accordance with ASME B31.3-2002, para. 331.1.3, is postweld heat treatmentrequired for branch connection welds when the thickness of the components at the joint is greaterthan the nominal thickness listed in Table 331.1.1, but the thickness through the weld in anyplane is less than two times the nominal wall thickness listed?

Reply: No. See para. 331.1.3(a).


Subject: ASME B31.3-2002, Para. 345.4, Hydrostatic Leak Test


File: B31-02-03683

Question: In accordance with ASME B31.3-2002, is it permitted to hydrotest at a lower pressurethan required by para. 345.4 because B31.3 piping is connected to piping constructed to anotherASME B31 Code which allows a lower hydrotest pressure?

Reply: No.

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ASME B31.3-2004 19-26, 19-27, 19-28, 19-29


Subject: ASME B31.3-1999 Edition, Para. 328.2.2(i), Welding Qualification


File: B31-02-03819

Question: In accordance with ASME B31.3-1999 (2001 Addenda), para. 328.2.2(i), when usingwelding procedures qualified by others, must all welders qualified to a specific WPS be qualifiedby bend testing under BPV Section IX, para. QW-302?

Reply: No. Only one welder must be qualified to the specific WPS by the requirements of BPVSection IX, para. QW-302. All others may be qualified in accordance with ASME B31.3, para. 328.2.


Subject: ASME B31.3-2002, Para. 323.1.2, Unlisted Materials


File: B31-02-03884

Question: Does ASME B31.3-2002 permit a material not listed in Appendix A to be used inthe design of a pressure containing system?

Reply: Yes. See para. 323.1.2.

Intepretation: 19-28

Subject: ASME B31.3-2002, Para. 323.1, Materials and Specifications


File: B31-02-04056

Question: Does ASME B31.3-2002 require maintenance of traceability to a heat number markingof a component that is removed or rendered unreadable during the fabrication process?

Reply: No.


Subject: ASME B31.3-2002, Para. 304.7.2, Metric Size Piping Components


File: B31-02-04110

Question: In accordance with ASME B31.3-2002, if unlisted components are qualified for usein B31.3 piping systems in accordance with para. 304.7.2 in IPS sizes, are they also qualified inmetric sizes?

Reply: It is the responsibility of the manufacturer to determine that the fittings are qualified,considering para. 304.7.2(e).

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19-30, 19-31, 19-32 ASME B31.3-2004


Subject: ASME B31.3-2002, Para. 345, Testing


File: B31-02-04197

Question (1): In accordance with ASME B31.3-2002, if an owner considers a hydrostatic leaktest impractical for reasons listed in para. 345.1(b) for non-jacketed pipe subject to externalpressure, and substitutes a pneumatic leak test, do the provisions of para. 345.2.4 take precedenceover the test pressure prescribed in para. 345.5.4?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002, if an owner considers a hydrostatic leaktest impractical, for reasons listed in para. 345.1(b) for jacketed pipe subject to external pressure,and substitutes a pneumatic test, do the provisions of para. 345.2.4 take precedence over the testpressure prescribed in para. 345.5.4?

Reply (2): Yes and see the provisions of para. 345.2.5.

Question (3): In accordance with ASME B31.3-2002, are the requirements of para. 345.2.4 to beapplied to hydrostatic leak testing exclusively?

Reply (3): No. See para. 345.2.

Question (4): In accordance with ASME B31.3-2002, if a pipe is to be subjected to a hydrostaticleak test in accordance with para. 345.2.4, must the ST/S ratio of equation (24) be considered?

Reply (4): No.


Subject: ASME B31.3-2002, Para. 300(c)(5), Gas Pressure Reducing Station


File: B31-03-00062

Question: In accordance with ASME B31.3-2002, is it required to apply ASME B31.1, para.122.8.1 for a Gas Pressure Reducing Station that is specified to be designed to B31.3?



Subject: ASME B31.3-2002, Para. 345.5, Pneumatic Leak Test


File: B31-03-00264

Question: Does ASME B31-3-2002 provide procedures for pneumatic testing other than thoseshown in para. 345.5?

Reply: No.

I-13



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ASME B31.3-2004 19-33, 19-34, 19-35


Subject: ASME B31.3-2002, Para. 304.3.1(a)(2), Branch Connections


File: B31-03-00429

Question (1): In accordance with ASME B31.3-2002, are couplings (socket welded or threaded)permitted for use as branch connections?

Reply (1): Yes. See para. 304.3.1(a)(2).

Question (2): In accordance with ASME B31.3-2002, may couplings used as branch connectionsbe attached using fillet welds?

Reply (2): No. See para. 328.5.4(d).


Subject: ASME B31.3-2002, Para. 300.2, Definition of Fluid Service


File: B31-03-00437

Question (1): In accordance with ASME B31.3-2002, is it permissible to categorize pipingconveying a flammable fluid service as Category D fluid service?

Reply (1): No. See para. 300.2, definition of fluid service, subparagraph (a).

Question (2): In accordance with ASME B31.3-2002, do circumferential butt welds made byautomatic orbital welding method or any other welding method require NDE in piping containingflammable fluid?

Reply (2): Yes.


Subject: ASME B31.3-2002, Table 323.2.2, Requirements for Low Temperature Tests for Metals


File: B31-03-00479

Question: Does ASME B31.3-2002 permit fabrication of a piping system with a design minimumtemperature of −50°F with filler material in accordance with a specification with a recommendedminimum of −20°F?

Reply: Yes, provided the requirements of Table 323.2.2 are satisfied.

I-14



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19-36, 19-37, 19-38 ASME B31.3-2004


Subject: ASME B31.3-2002, Para. 321.1.4(e), Piping Support Materials


File: B31-03-00482

Question: In accordance with ASME B31.3-2002, para. 321.1.4(e), is it required that attachmentmaterial welded to the pipe have the same properties and composition as the pipe material?

Reply: No. See para. 321.3.2 for additional requirements for welded attachments and para.328.5 for welding requirements.


Subject: ASME B31.3-2002, Para. 302.3.2(a)(3), Bases for Design Stresses


File: B31-03-00694

Question: Does ASME B31.3-2002, para. 302.3.2(a)(3) require, for bolting material whose strengthhas been enhanced by heat treatment or strain hardening, for temperatures below the creep range,the values of allowable stress for the material in the annealed condition [determined in accordancewith paras. 302.3.2(a)(1) and (2)] be used if it is greater than the value for the strain hardenedor heat treated bolt determined in accordance with para. 302.3.2(c)(3)?

Reply: Yes.


Subject: ASME B31.3-2002, Para. 302.3.2(d), Bases for Design Stresses


File: B31-03-00734

Question (1): In accordance with ASME B31.3-2002, for a listed carbon steel material, may themeasured tensile strength and measured yield strength as shown in the Material Test Report beused to establish the basic allowable stress values at room temperature per para. 302.3.2, insteadof using the basic allowable stress values in Appendix A?

Reply (1): No.

Question (2): In accordance with ASME B31.3-2002, if a material conforms to a listed materialand also to a published unlisted material (i.e., dual certified) which has higher specified minimumstrengths, may the allowable stresses be determined using para. 323.1.2?

Reply (2): Yes.

I-15



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ASME B31.3-2004 19-39, 19-40, 19-41


Subject: ASME B31.3-2002, Para. 323.2.2(d), Lower Temperature Limits, Listed Materials


File: B31-03-00821

Question (1): In accordance with ASME B31.3-2002, para. 323.2.2(d), may Fig. 323.2.2B beapplied to carbon steel materials which have a numerical value listed in the Minimum Temperaturecolumn of Table A-1?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-2002, do the additional requirements in paras.323.2.2(d)(1)(a) and 323.2.2(d)(1)(b) apply to carbon steel materials covered by para. 323.2.2(a)?

Reply (2): No.


Subject: ASME B31.3-2002, Para. 319.3.1(a), Thermal Expansion Data


File: B31-03-00829

Question: In accordance with ASME B31.3-2002, does the phrase “maximum metal tempera-ture...for the thermal cycle under analysis” in para. 319.3.1(a) require the use of the designtemperature (defined in accordance with para. 301.3) in “determining total displacement strainsfor computing the stress range” SE?

Reply: No.


Subject: ASME B31.3-2002, Para. 322.6.3, Reference to BPV Section VIII, Division 1, Para. UG-128


File: B31-03-00827

Question: In accordance with ASME B31.3-2002, if the appropriate engineering calculations areperformed in accordance with para. 300(c)(3) to ensure that a smaller relief device has the capacityto relieve the pressure generated, can a relief device smaller than NPS 1⁄2 be used in accordancewith para. 322.6.3, considering the reference to the BPV Code Section VIII, Division 1, UG-128?

Reply: Yes, provided the component meets all other requirements of B31.3.

I-16



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19-42, 19-43 ASME B31.3-2004


Subject: ASME B31.3-1996 Edition, Para. 341.4.1(b)(1), Extent of Required Examination


File: B31-03-00828

Question (1): In accordance with ASME B31.3-1996 Edition, for a girth or miter groove weldthat is visually examined by radiography internally and externally, and then examined, is itrequired that both the criteria (depth and length) for incomplete penetration in Table 341.3.2 beevaluated for acceptance of the weld?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1996 Edition, for a girth or miter groove weldthat does not have access to examine the weld internally and is visually acceptable externally,and is examined by radiography, is it required that both the criteria (depth and length) forincomplete penetration in Table 341.3.2 be evaluated for acceptance of the weld?

Reply (2): Yes.

Question (3): In accordance with ASME B31.3-1996 Edition, for a girth or miter groove weldthat does not have access to examine the weld internally and is visually acceptable externally,and is examined by radiography, is it acceptable to apply only the criteria for length for incompletepenetration in accordance with Table 341.3.2, for acceptance of the weld?

Reply (3): No, all listed types of weld imperfection must be evaluated.

Question (4): In accordance with ASME B31.3-1996 Edition, for girth or miter groove weld thatdoes not have access to examine the weld internally and is visually acceptable externally, and isexamined by radiography, is it acceptable to determine the depth of incomplete penetration inaccordance with Table 341.3.2, by density comparison of incomplete penetration to the densityof the wall thickness on the radiograph?

Reply (4): The Code does not address the methods for determining the extent of incompletepenetration.

Question (5): In accordance with ASME B31.3-1996 Edition, for a girth or miter groove weldthat does not have access to examine the weld internally and is visually acceptable externally,and is examined by radiography, if the depth of the incomplete penetration is indeterminablevisually, does the weld meet the requirement for the depth of incomplete penetration?

Reply (5): The Code does not address the methods for determining the extent of incompletepenetration.


Subject: ASME B31.3-1999 Edition, Table A-1, Fig. 323.2.2A, Impact Testing


File: B31-03-00906

Question: In accordance with ASME B31.3-1999 Edition, does a material with a letter designationin the Minimum Temperature column of Table A-1 require impact testing when the temperature/material thickness combination falls below the curve of Fig. 323.2.2A for the specified letterdesignation?

Reply: Yes. See para. 323.2.2(c), unless exemptions apply.

I-17



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ASME B31.3-2004 19-44, 19-45, 19-46


Subject: ASME B31.3-2002, Para. 345.2.5, Leak Test


File: B31-03-01343

Question: In accordance with ASME B31.3-2002, when a leak test is applied to jacketed pipewhere the leak test is to be based upon a critical external design pressure in accordance withpara. 345.2.5(a), is the internal test pressure to be in accordance with para. 345.2.4 regardless ofwhether the leak test is hydrostatic, pneumatic, or hydrostatic-pneumatic?

Reply: Yes.


Subject: ASME B31.3-2002, Para. 318.2.2, Mechanical Interlock


File: B31-03-01345

Question: In accordance with ASME B31.3-2002, would a joint in which the mechanical strengthis developed by crimping a female part onto a pipe or tube qualify as having a mechanicalinterlock in accordance with para. 318.2.2?

Reply: Yes.


Subject: ASME B31.3-2002, Table A-1, Allowable Stress Values for Carbon Steel Piping


File: B31-03-01346

Question: In accordance with ASME B31.3-2002, do Table A-1 allowable stress values for carbonsteel piping contain a built-in allowance for loss of tensile strength at temperatures below 204°C(400°F)?

Reply: For the design stress bases, see para. 302.3.

I-18



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19-47, 19-48, 19-49 ASME B31.3-2004


Subject: ASME B31.3-2002, Para. 323.2.2, Lower Temperature Limits


File: B31-03-01347

Question (1): In accordance with ASME B31.3-2002, when using a reduced stress ratio per Fig.323.2.2B to permit use of non-impact tested materials per para. 323.2.2(d), can the hydrostatictest required by para. 323.2.2(d)(1)(a) be substituted with the pneumatic test as permitted bypara. 345.1(b)?

Reply (1): No.

Question (2): In accordance with ASME B31.3-2002, if a material is exempt from impact testingbecause the requirements of para. 323.2.2(d) are satisfied, are welds and heat affected zonesrequired to be tested per Table 323.2.2, Column A (b)?

Reply (2): No.


Subject: ASME B31.3-2002, Paras. 300(c)(3) and 304.7.2, Radiographic Survey Plugs


File: B31-03-01455

Question: Does ASME B31.3-2002 permit the use of plugs threaded into the pipe wall, such asmight be used for radiographic surveys?

Reply: Yes, provided all of the requirements of ASME B31.3 are met, including the reinforcementrequirements of para. 304.3.


Subject: ASME B31.3-2002, Paras. 341 and 345, Repair or Replacement of Piping


File: B31-03-01441

Question (1): Does ASME B31.3-2002 apply to the repair of piping or piping components whichhave been placed into service?

Reply (1): No. See para. 300(c)(2).

Question (2): Does ASME B31.3-2002 apply to the replacement of piping or piping componentswhich have been placed into service?

Reply (2): The Code does not address replacement.

I-19



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I-20



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Cumulative Index — Interpretations Vols. 1–19 ASME B31.3-2004

NUMERICAL INDEXCode references are based on ASME B31.3-1990 or laterEditions. References in brackets are to previous Editionsand Addenda.


Introduction 1-31-61-713-04

300 7-108-1719-11

300(b) 1-261-324-085-038-0910-1113-14

300(c) 3-23-44-106-03R (Vol. 7)7-058-3013-0216-1218-0919-3119-48

300(c) [300(e)] 1-31-61-7

300.1 7-108-179-0612-20

300.1.1 1-471-522-263-14-196-018-019-0217-01

Fig. 300.1.1 1-81-192-267-108-17

(a)


300.1.3 [300.1.4] 1-81-161-191-263-215-09

300.1.3(d) 10-05300.2Category D Fluid Service 4-13

5-036-0119-34


1-736-018-099-02

notch-sensitive 2-22owner 2-30piping components 3-2

8-0114-0317-23



301 5-11301.2 2-3

7-01301.2.1 2-29

13-15301.3 2-3

17-07301.3.1 10-02310.3.2 4-11301.5.3 4-07301.7.2 3-4302 1-32

19-03302.2 1-50302.2.1 16-18302.2.2 17-11

19-02302.2.3 19-19


302.2.4 [302.2.3] 1-31-322-143-44-117-017-048-0414-0917-12

302.2.5 13-15302.3.2 1-18

1-382-163-138-2511-0516-0419-3719-38

302.3.4 2-2017-14

Table 302.3.4 1-421-782-203-11

302.3.5 1-201-502-142-152-243-44-104-126-03R (Vol. 7)6-077-047-058-1615-1516-1117-0417-1818-16

Table 302.3.5 16-10302.3.6 1-50



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ASME B31.3-2004 Cumulative Index — Interpretations Vols. 1–19


302.3.6 (Cont’d)2-152-162-1719-18

302.4 1-20303 6-05304.1.1 1-42

1-541-7013-0715-0615-1016-14

304.1.2 1-421-571-681-702-1110-20

304.2 15-14304.2.2 18-06304.2.3 1-22

5-11Fig. 304.2.3 1-22304.3 1-21

1-465-016-09

304.3.1 19-33304.3.2 4-05304.3.3 4-03

7-028-068-3711-1012-0514-1015-0517-26

Fig. 304.3.3 8-37304.3.4 1-21

1-371-551-752-27

Fig. 304.3.4 1-70304.3.5 12-13304.5 3-4

9-0710-1419-12

304.5.1 8-18

(b)


304.5.1(b) 9-10304.7.2 1-51

3-24-055-055-116-0910-710-1110-1812-0913-0213-0313-0513-1119-29

304.7.4 1-16305.2 3-8

3-9305.2.1 1-38305.2.3 6-01

7-03306.4 12-16306.4.2 11-03308.2.1 5-12308.2.4 5-12311.2.4 6-02

6-05311.2.5 10-04312 9-07314.2.1 2-22Table 314.2.1 8-33

11-16315.2 3-6315.3 3-6317.2 1-17318 8-13318.2.2 19-45Table 319.3.6 9-01319.2.1 2-17319.2.3 7-04

7-0512-0618-13

319.3.1 19-40319.3.1(b) 15-24319.3.5 4-10319.3.6 1-6

1-71-552-245-1513-05


319.4.1 1-3313-14

319.4.4 1-712-72-24

319.7 1-167-05

321.1.1 6-07321.1.4 1-49

19-36322.3 17-24322.6.1 10-10

12-18322.6.3 1-32

2-212-297-0112-0414-09

323.1 19-28323.1.1 8-19

17-09R19-41

323.1.2 1-111-151-482-16-068-078-1911-0315-0417-0117-0819-27

323.2 3-9323.2.1 1-13323.2.2 15-12

15-2519-0719-2119-3519-3919-47

Fig. 323.2.2 14-08Table 323.2.2 [Table 1-12

323.2.1]1-481-651-762-193-84-01



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Table 323.2.2 [Table 323.2.1] (Cont’d)4-1514-1215-1115-1618-1217-09R

323.2.4 6-06323.3 1-76

5-13323.3.2 11-12Table 323.3.1 [Table 1-12

323.3.2]1-764-175-195-218-2910-0211-1215-23

323.3.4 8-30323.3.5 2-9323.4 15-03323.4.2 10-01

10-19Table 323.3.5 5-14Table 326.1 1-11

1-512-38-078-3419-14

328 7-0212-12

328.1 12-07328.2 [327.5] 1-66

11-0914-13

328.2.1 [327.5.1, 327.5.2] 1-764-178-2919-22

328.2.2(g) 14-05328.2.2(i) 19-26328.2.3 15-19

18-08328.4 13-01328.4.2 and Fig. 328.4.2 12-10328.4.3 14-04Fig. 328.4.4 8-28

9-08328.5 [327.4] 5-09

(c)


328.5.1 [327.4.1] 5-17328.5.2 [327.4.2] 5-12

16-0619-20

Fig. 328.5.2 [Fig. 327.4.2] 1-285-126-026-058-2715-0819-16

328.5.4 [327.4.4] 1-591-742-104-034-147-088-1310-0413-11

Fig. 328.5.4 [Fig. 327.4.4] 1-591-744-034-167-08

328.6 2-18330 8-21330.1 8-23Table 330.1.1 9-05331 8-12331.1.1 8-08

9-0514-0119-15

Table 331.1.1 [Table 1-69331.3.1]

2-25-068-249-0312-1414-1617-01

331.1.2 8-05331.1.3 [331.3.6] 1-39

1-594-065-069-0311-0614-0115-1817-13


331.1.3 [331.3.6] (Cont’d)17-2118-0219-24

331.1.4 [331.1.2] 5-08331.1.6 [331.3.4] 5-08

16-09331.1.7 [331.3.2] 1-78

8-22331.2 18-04331.2.2 [331.1.1] 1-39

1-78331.3.4 8-05331.3.7 8-05332.1 8-03

19-04332.2 [329.1] 1-23

1-534-028-20

332.2.2 16-08332.4 [329.3, 330.2] 2-2

19-04332.4.2 11-03

15-17335.1.1 15-07

17-25335.2 2-5335.2.3 17-20340.2 [336.1.2] 1-26340.3 [336.3] 1-10

10-03340.4 [336.2] 1-31

17-15341 10-16

15-1319-49

341.2 [336.1.1, 336.1.3] 1-101-261-272-2810-03

341.3.1 [336.5] 1-642-419-15

341.3.2 8-32Fig. 341.3.2 [Fig. 327.4.1] 5-09

13-16Table 341.3.2 14-02

14-0714-1516-0717-03



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Table 341.3.2 (Cont’d)17-2218-07

[Table 327.4.1A] 1-11-91-141-412-85-045-135-165-175-185-206-047-06

[Table 341.3.2A] 8-328-389-0411-0811-1412-2213-16

341.3.3 14-14341.3.4 [336.5, 336.5.4] 1-62

2-252-323-53-1410-0910-1211-0211-0413-1216-0116-0216-0518-01

341.4 [336.5] 1-241-453-125-2011-01

341.4.1 [336.5.1] 1-101-261-271-602-122-283-73-124-125-10

(d)


341.4.1 [336.5.1] (Cont’d)8-028-108-2610-0310-1711-1111-1411-1518-1419-0519-42

341.4.2 8-38341.4.3 8-10341.5 8-38341.5.1 [336.6.1] 1-5

3-12342 15-21342.1 [336.4.1] 2-28343 [336.4.1] 2-28344 [336.4] 5-09

16-1318-11

344.1 13-12344.2 [336.4.2] 2-28

8-108-2611-1115-2118-17

344.2.1 19-17344.5 [336.4.5] 1-10

1-602-12

344.6 [336.4.6] 1-60344.6.2 10-17344.7 [336.4.7] 2-28

3-1412-0119-17

344.7.1 11-11345 [337] 1-2

1-722-313-38-3116-0317-3019-2319-3019-49

345.1 [337.1] 1-41-30


345.1 [337.1] (Cont’d)4-046-088-1512-21

345.2.2 8-3118-10

345.2.3(i) 17-28345.2.4 [337.4.3] 1-35345.2.5 19-44345.2.6 [337.1] 1-2

5-2219-23

345.3 [337.3] 2-63-105-0212-03

345.4 8-0419-25

345.4.1 12-19345.4.2 [337.4.1] 1-35

1-611-632-234-049-0913-1318-0319-10

345.4.3 [337.4.2] 1-63345.5 [337.4.4] 1-35

1-436-0811-0713-0619-32

345.5.2 11-19345.5.4 12-02345.7 [337.5.2] 1-36345.8 [337.6] 1-25

3-1017-0219-06

345.9 [337.5.1] 4-095-076-088-1510-1512-0112-2115-0217-0517-10



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



345.9 [337.5.1] (Cont’d)18-15

A304 8-14A304.1.1 14-17

14-18A304.5.1 1-67A304.7.2 13-08A305 11-17A314 8-33A322.6 17-29A323.4.2 10-06

11-18A327.2.4 7-09A328.2(a) 10-8A328.2.1 8-14

18-05A328.2.5 17-06A328.5 8-14

10-0813-08

K300(a) 17-16K304.1.2 11-21

14-11K314.2 17-19K315 7-07K322.3 7-07K323.1.2 19-09K328.2.1(a) 17-27Fig. K328.5.4 8-37M305.1 12-15M307.2 8-35M322.3 2-13

3-6M323.1.3 3-7M326 2-13M335.4 [M335.5, M335.6] 3-6M341.4 [M336.5] 1-24

1-45M341.4.1 [M336.5.1] 2-28

3-7

(e)


M345.1 6-08MA306.5 9-02MA323.4 9-02

19-08MA323.4.2 8-35Appendix A Notes (no 2-20


1-181-291-381-481-772-13-83-93-134-124-136-016-067-038-118-188-258-348-3611-1312-0915-0119-4319-46

Table A-1B [Table 1] 1-782-204-187-03


Appendix B 19-13Appendix D 1-6

1-71-341-461-551-561-712-72-244-165-015-156-0612-0812-1112-1713-0518-18

Appendix E [Appendix 1-44K]

5-1019-20

Appendix F [F323.2] 1-29Appendix G 5-12Appendix H 8-06


1-541-755-04

Appendix M 6-018-09

Appendix V 17-17Appendix X, X3.1.3 12-23Appendix X, X3.2.2 13-09Appendix X, X302.2.3 15-22Case 137 3-1Case 141 1-51



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SUBJECT INDEX



1-91-141-412-85-095-135-175-185-206-047-068-3212-2213-1614-0214-07



3-138-118-2510-1315-01



pipe




Bellows 13-09

(f)


Bending 4-028-0315-1716-08


diameter



for plastic pipingrequirements 18-05solvent cement 8-14


Bolting Materials 4-1517-20


2-276-09




8-3712-0512-1314-1015-05

weld requirements 2-104-034-147-02



7-0810-0413-1117-26


Buckles 1-231-53



5-03radiographic examination 8-38


9-02double contained piping 8-35leak test 6-08liquid oxygen 8-09requirements 8-35

9-0212-15



7-10fired heaters 15-09general hydrocarbon 6-01

servicein-line sensing devices 8-01intent 16-12later editions 19-01new and replacement 5-22

piping12-2119-49

offshore platform 8-17oil heating system 4-19



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Code Coverage (Cont’d)

radioactive fluids 12-20synfuel plant piping 1-52




defining 17-23design conditions 2-3fabricated or flared flaps 11-03

12-16in-line sensing devices 8-01metric size 19-29referenced standards 1-44

5-10





considerationsconditions 2-3for stainless bellows 12-23Lame theory 1-57minimum temperature 10-02

Displacement Stress 2-142-2412-0618-13




5-1811-01



(g)


Examination (Cont’d)

progressive (see ProgressiveExamination)

radiographic (seeRadiographic Examination)

random 1-271-451-622-122-324-1211-15

records 11-11required 1-24

1-606-0411-1411-1515-1315-2118-14



18-11visual (see Visual

Examination)ultrasonic (see Ultrasonic

Examination)


internal pipingfor interconnecting piping 1-19listed in scope 10-5





Fatigue 18-09



FittingsB16.9 1-7

5-0119-14



MSS SP-75 1-11

Flammable Service 1-17


3-49-7



metallic

Flexibility Analysisbranch connections 9-01exemptions from 1-33qualification 13-05




1-565-01


2-24


12-0812-17







--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---



Fluid Service (Cont’d)

general hydrocarbon 6-01requirements, metallic 11-16

12-1512-1615-03

requirements, nonmetallic 11-1711-18


8-09


onset




19-04for flared laps 11-03for valve parts 8-12governing thickness 1-39

1-594-065-0611-06


8-05monitoring 5-08


8-218-238-249-039-0512-1414-0114-1615-1818-04


required

(h)


Heat Treatment (Cont’d)when radiography is required (Cont’d)

2-4


Impact Testsabsorbed energy data 2-9alternative methods 8-30base metal 4-01

11-1218-12


heat treatment required 5-19in qualifying procedures 8-29of aluminum filler metals 2-19of austenitic stainless steel 1-65of bolting materials 4-15of the heat-affected zone 1-76

5-21of weldments 1-12

1-651-765-2119-21


temperature limitation 5-148-3014-1219-0719-43




5-135-165-20



2-86-04


Instrument Piping 7-07


Instrument Piping (Cont’d)8-01




welds3-118-0617-14




17-19



15-2216-03

alternative 4-095-076-088-1512-0112-2117-0517-1018-15





pressure4-04



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Leak Tests (Cont’d)


of discharge piping 1-72of newly constructed 1-4

systems5-025-228-15




3-105-23


11-1912-0213-0619-2319-3019-32

preparation for 2-63-105-025-2312-03


2-2313-13


sensitive 1-2517-0219-0619-23



19-10




3-6

(i)





2-43-93-116-016-06

API 5LX 2-411-05

ASTM A234 2-20ASTM A 312 1-29

1-772-20

ASTM A 350 19-07ASTM A 351 11-13ASTM A 387 8-25ASTM A 403 1-77


8-0213-10


listed 17-09R17-11

notch sensitive 2-22reidentification 8-19toughness requirements 5-19traceability 19-28unlisted material 11-05

11-2015-0417-0117-0819-27




5-11


Nomenclatured 1-54T 1-28tn 1-75TW 5-04

5-16




8-14materials 19-08pressure design 14-17

14-18



2-144-11

loads 1-502-152-162-1719-18


2-305-2219-11

Owner’s Inspectorqualifications of 1-31responsibilities of 1-26

Pipealterations of existing pipe 13-04curved and mitered 15-14

segments18-06



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Pipe (Cont’d)



14-09pressure testing 9-09spiral welded 7-03straight, under internal 10-20

pressure11-2114-11

Pipe Supportsconfigurations 6-07longitudinal stress effects 7-05materials 19-36use of plastic 1-49







Pressure Designallowance 17-12for elevated temperatures 3-4in the high pressure range 1-68



13-1519-12


components14-18

of pipe 1-421-541-571-68

(j)


Pressure Design (Cont’d)of pipe (Cont’d)

1-702-1111-2113-0715-0615-1017-06


of unlisted components 13-0213-0313-05

of valves 8-0413-15



2-2919-41



7-0112-04




8-34


Progressive Examination 1-51-623-510-0910-1010-1211-02


Progressive Examination (Cont’d)11-0413-1216-0116-0216-0518-01


Radiographic Examination100% 5-09as supplementary 8-38

examinationrandom radiography 1-27

1-451-622-122-323-12


11-0111-0512-03




2-4


8-0210-03


of examinations 11-11of hardness tests 8-22retention of 1-10



11-10limits of 2-27

9-04


Responsibilitydesigner 10-11



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Responsibility (Cont’d)

rights of owner’s 10-03inspection

17-15

Safeguarding 5-12




changespiral welded pipe 7-03



8-02valves 5-05

8-048-07



19-3819-46

displacement stress range 7-0412-06


16-0416-11


1-502-152-244-104-126-03R

(Vol.7)

(k)


Stresses (see also Allowable Stresses)(Cont’d)

longitudinal (Cont’d)6-077-058-1617-1818-16

reduction factors 16-10


2-246-03R

(Vol.7)


5-15for tees 1-46

1-551-715-0112-0812-17


12-11

Temperaturesallowance 17-12bending 16-08design minimum 10-02

temperature14-0814-1215-1115-1617-0719-35


5-1415-1215-2519-47


reduction 4-11verification 16-09variation in elevated 17-17

temperature service




3-6


17-2118-02


Ultrasonic Examinationin place of radiography 11-05requirements 10-17


1-513-64-055-058-710-1810-0710-1112-0913-0213-0313-0519-0319-19





8-2613-16




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Visual Examination (Cont’d)requirements (Cont’d)

18-17

Washers, Use of 2-5


17-2218-07



11-0111-1413-1614-1414-1515-0219-1719-42

fillet size 1-7410-1916-06

final 19-15

(l)


Weld (Cont’d)

for branch connections 2-104-034-148-3711-1019-25

imperfections (seeAcceptable Criteria)




11-08repair 2-18socket 6-02

6-0510-1915-0816-0619-20

spacing of 7-02



by others 15-19

18-08

19-26

requirements 17-27

Welding Procedure

qualification of 1-12

1-65

1-66

1-76

4-17

8-23

8-29

11-09

14-05

14-13

19-22

responsibility 12-07

12-12

specification 8-21

8-22



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ASME B31.3

INTERPRETATIONS NO. 18

Replies to Technical Inquiries December 1, 1999 through March 31, 2001

General Information

It has been agreed to publish interpretations issued by the B31 Committee concerning B31.3 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies to the Edition or Addenda stated in the interpretation, or if none is stated, to the Edition or Addenda in effect on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply.

These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity. In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply bearing the original interpretation number with the suffix R is presented.

ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the B31 Committee, refer to Appendix Z.

Code Reference and Subject Indexes

Code Reference and Subject Indexes have been prepared to assist the user in locating interpretations by location or by subject matter in the Code. They cover interpretations issued from Volume 1 up to and including the present volume, and will be updated with each volume.

213



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B31.3 Subject . Appendix D, Thickness of a Welding Tee ..................................... Para . 300(c). General Statements., .......................................... Para . 302.3.5(c), Limits of Calculated Stresses Due to Sustained oads and

Displacement Strains ..................................................... Para . 304.2.2., Curved and Mitered Segments of Pipe ............................ Para . 319.2.3, Displacement Stress Range ....................................... Para . 328.2.3, Performance Qualification by others .............................. Para . 33 1.1.3, Governing Thickness ........................................... Para . 331.2, Heat Treatment Specific Requirements .............................. Para . 341.3.4(a), Progressive Sampling for Examination .......................... Para . 341.4.1@)(1), Examination Normally Required ............................. Para . 344. Types of Examination ............................................. Para . 344.2, Visual Examination .............................................

Para . 345.4.2, Test Pressure ................................................. Para . 345.9.1, Alternative Leak Test .......................................... Para . A328.2.1@), Bonding Qualification Requirements ..........................

Para. 345.2.2(a), Other Test Requirements .....................................

Table 323.2.2, Impact Testing Requirements for Metais .......................... Table 323.2.2, Impact Testing Requirements for Metals .......................... Table 341.3.2, Acceptance Criteria for Welds ...................................

Intemretation

18-18 18-09 18-16

18-06 18-13 18-08 18-02 18-04 18-01 18-14 18-11 18-17 18-10 18-03 18-15 18-05 18-12 17-09R 18-07

File No .

B3 1-00-044 B31 -Ca-O13 831-00-032

831-00-010 B3 1-00-029 B3 1-00-012 83 1-00-003 8 3 1-00-006 B3 1-00-002 B3 1-00-030 B3 1-00-025 831-00-043 B3 1-00-016 B3 1-00-004 B 3 1 1-00-03 B31-00-009 831-00-028 B3 1-00-028 B31-00-011

214



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831.3 Interpretations No. 18 18-01, 18-02


Subject: ASME B3 1.3- 1999 Edition, Para. 341.3.4(a), Progressive Sampling for Examination

Date Issued: May 3 1, 2000

File: B31-00-002

Question (1): In accordance with ASME B31.3-1999 Edition, if a welding operator’s weld is rejected and the repair is made by another welding operator, does para. 341.3.3 require the repair weld be examined?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1999 Edition, may the two additional welds required by

Reply (2): Yes.

para. 341.3.4(a) be examined at the same time as the above referenced repair weld?


Subject: ASME B31.3-1999 Edition, Para. 331.1.3, Governing Thickness


File: B31-00-003

Question (1): In accordance with ASME B31.3-1999 Edition, para. 331.1.3, can the governing thickness for the heat treatment of branch connection welds in Fig. 328.5.4D be calculated or determined by means other than the formulas provided in para. 331.1.3(a)?

Reply (1): No.

Question (2): In accordance with ASME B31.3-1999 Edition, para. 331.1.3, shall the governing through- weld thickness for the heat treatment of branch connection welds in accordance with Fig. 328.5.4D be calculated in accordance with the formulas provided in para. 331.1.3(a), even if a dimension through the weld may be greater than calculated by the formulas?

Reply (2): Yes.

215



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18-03, 18-04, 18-05 831.3 interpretations No. 18


Subject: ASME B31.3-1999 Edition, Para. 345.4.2, Test Pressure


File: B3 1-00-004

Question (1): In accordance with ASME B31.3-1999 Edition, para. 345.4.2(b), when a piping system is constructed of different materials, shall the stress values, ST and S, from each of the individual points in the system be used to calculate the required test pressure for that point in the system in accordance with Eq. (24)?

Reply (1): Yes.

Question (2): In accordance with ASME B3 1.3-1999 Edition, when the required test pressure for individual points in a piping system differ, and the system is tested as a whole, may any point in the piping system be subjected to a pressure less than its required test pressure in accordance with Eq. (24)?

Reply (2): No, except as provided for in paras. 345.4.2(b), 345.4.2(c), and 345.4.3.


Subject: ASME B3 1.3- 1999 Edition, Para. 331.2, Heat Treatment Specific Requirements


File: B31-00-006

Question: In accordance with ASME B31.3-1999 Edition, may alternative heat treatment methods or

Reply: Yes. See para. 331.2.

exceptions be specified in the engineering design?


Subject: ASME B31.3-1999 Edition, Para. A328.2.l(b), Bonding Qualification Requirements


File: B3 1-00-009

Question (1): In accordance with ASME B31.3-1999 Edition, para. A328.2.l(b), does each material type,

Reply (1): No.

using the same joining method, require a separate bonding procedure specification (BPS)?

Question (2): In accordance with ASME B31.3-1999 Edition, para. A328.2.5 is a bonder or bonding

Reply (2): No.

operator required to qualify for each material type listed in the BPS?

Question (3): In accordance with ASME B31.3-1999 Edition, can a bonder qualification test pressure for thermoplastics when using the hydrostatic test method, be less than the calculated test pressure in accordance with A328.2.5(c)( i)?

Reply (3): No.

216



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631.3 Interpretations NO. 18 18-06, 18-07, 18-08


Subject: ASME B31.3-1999 Edition, Para. 304.2.2, Curved and Mitered Segments of Pipe


File: B31-00-010

Question (1): In accordance with para. 304.2.2, if a B16.9 elbow is modified by trimming it (e.g., a standard 90 deg elbow trimmed to 75 or 15 deg), such that it no longer is in compliance with B16.9, must it be qualified as an unlisted component in accordance with para. 304.7.2?

Reply (1): Yes.

Question (2): Is the pressure rating of a B16.9 fitting determined by the actual pipe to which it is attached?

Reply (2): No. See para. 302.2.2.

Question (3): If the ends of a B16.9 or B16.10 component have been taper bored, such that its length no longer meets the length requirements of the component standard, must it be qualified by para. 304.7.2?

Reply (3): Yes.


Subject: ASME B31.3-1999 Edition, Table 341.3.2, Acceptance Criteria for Welds

Date Issued: May 3 1, 2000

File: B31-00-011

Question: In accordance with ASME B31.3-1999 Edition, Table 341.3.2, what is the acceptance criteria

Reply: The Code does not require welds greater than 3/16 in. nominal thickness to be evaluated for these

for surface porosity and exposed slag inclusions for weld thickness greater than 3/16 in.?

imperfections.


Subject: ASME B31.3-1999 Edition, Para. 328.2.3, Performance Qualification by Others

Date Issued May 31, 2000

File: B31-00-012

Question: In accordance with ASME B31.3-1999 Edition, para. 328.2.3, is it acceptable to use the date furnished by a previous employer for the Welder Qualification Record as the date that the individual last used the procedure on pressure piping when that date cannot be determined?

Reply: No.

217



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18-09, 18-10, 18-11 831.3 Interpretations No. 18


Subject: ASME B3 1.3- 1999 Edition, Para. 300(c), General Statements


File: B31-00-013

Question (1): In accordance with ASME B31.3-1999 Edition, should the designer use EQ. (Id) to assess

Reply (1): Yes. However, see para. 300(c)(3).

fatigue from two or more sources (e.g., thermal plus wave action)?

Question (2): When determining the allowable displacement stress range of high strength materials in

Reply (2): Yes. However, see para. 300(c)(5).

B31.3 piping, does B31.3 use the allowable stresses in Appendix A in Eqs. (la) and (lb)?


Subject: ASME B31.3- 1999 Edition, Para. 345.2.2(a), Other Test Requirements


File: B31-00-016

Question: In accordance with ASME B31.3-1999 Edition, can the requirement of para. 345.2.2(a) be satisfied by lowering the test pressure to the design pressure (multiplied by the ratio of the allowable stress for the test temperature to the allowable stress for the design temperature) before examination for leaks?

Reply: No.

Interpretation: 18-1 1

Subject: ASME B31.3-1999 Edition, Para. 344, Types of Examination

Date Issued: November 1,2000

File: B31-00-025

Question (i): In accordance with ASME B31.3-1999 Edition, in a weld that is visually examined for Category D Fluid Service, shall incomplete penetration be judged only on indications at the root andor surface area?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1999 Edition, in a weld that is visually and/or radiographi- cally examined for Normal Fluid Service, is it required that depth of incomplete penetration be determined by radiography?

Reply (2): No.

21 8



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831.3 Interpretations No. 18 18-12, 17-09R


Subject: ASME B3 1.3a-2000 Addenda, Table 323.2.2, Impact Testing Requirements for Metals


File: B3 1-00-028

Question (1): In accordance with ASME B3 1.3a-2000 Addenda, may welded austenitic stainless steel pipe and fittings, with carbon content less than or equal to 0.1% and furnished in the solution heat-treated condition, be used at temperatures warmer than those listed in the Minimum Temperature Column of Table A-1 for the particular alloy in question without impact testing of the base metal?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3a-2000 Addenda, Table 323.2.2, does box A-4(a) apply

Reply (2): Yes.

to austenitic stainless steel pipe and fittings? O

Question (3): In accordance with ASME B31.3a-2000 Addenda, Table 323.2.2, does box A-4 (b) apply to welds performed on austenitic stainless steel pipe and fittings, by both the manufacturer of the component and the fabricator of the piping?

Reply (3): Yes.

Question (4): In accordance with ASME B31.3a-2000 Addenda, does para. 323.2.2(f) apply to welds - - - (with or without filler metal added) that are not subsequently solution heat treated?

Reply (4): Yes.

Interpretation: 17-09R (Replaces 17-09)

Subject: ASME B31.3a-2000 Addenda, Table 323.2.2, Impact Testing Requirements for Metals


File: B3 1-00-028

Question: In accordance with ASME B31.3b-1997 Addenda, are classes 12, 13, 22, and 23 of ASME

Reply: Yes.

A671, A672, and A691 the only listed materials in the Code for these specifications?

219



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Subject: ASME B3 1.3a-2000 Addenda, Para. 3 19.2.3, Displacement Stress Range


File: B3 1-00-029

Question (1): In Accordance with ASME B31.3a-2000 Addenda, is it permissible for the allowable displacement stress range calculated by Eq. (1 b) to exceed the yield strength of the material at the maximum metal temperature?

Reply (1): Yes, see para. 319.2.3. Also, see para. 319.2.2 regarding cautions for unbalanced systems.

Question (2): Does ASME B3 1.3a-2000 Addenda provide specific requirements for earthquake loads

Reply (2): No.

other than para. 301.5.3?


Subject: ASME B31.3-1999 Edition, Para. 341.4.l(b)(l), Examination Normally Required


File: B31-00-030

Question: In accordance with ASME B31.3-1999 Edition, if examination of a welder’s work is satisfacto- rily represented in accordance with the requirements of para. 341.4.1 (b)( 1) when producing welds requiring 100% examination, must examination of his work also be represented in production requiring a lesser degree of examination?

Reply: No, unless the welds requiring a lesser degree of examination are in a different designated lot.


Subject: ASME B3 1.3a-2000 Addenda, Para. 345.9.1, Alternative Leak Test


File: B3 1-00-03 1

Question: In accordance with ASME B31.3a-2000 Addenda, when 100% radiography is required by para. 345.9.1 for an alternative leak test, may 100% ultrasonic examination in accordance with para. 344.6 be used in place of radiography?

Reply: No.

220



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831.3 Interpretations No. 18 18-16, 18-17, 18-18


Subject: ASME B31.3a-2000 Addenda, Para. 302.3.5 (c), Limits of Calculated Stresses Due to Sustained

Date Issued: November 1, 20ûû

File: B3 1-00-032

Loads and Displacement Strains

Question: In accordance with ASME B3 1.3a-2000 Addenda, does the calculation of longitudinal stresses

Reply: No. See para. 302.3.5(d), including footnote 5, for allowable displacement stress range.

due to pressure, weight and other sustained loadings per para. 302.3.5(c) include vibrational loadings?


Subject: ASME B31.3-1999 Edition, Para. 344.2, Visual Examination


File: B3 1-00-043

Question (1): In accordance with ASME B31.3-1999 Edition, paras. 344.2 and 344.7, for in-process visual examination, shall the acceptance or rejection of the individual items specified in para. 344.7 be recorded?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1999 Edition, paras. 344.2 and 344.7 for in-process visual

Reply (2): No.

examination, is it required to record the value of each individual item specified in para. 344.7.1?


Subject: ASME B31.3a-2000 Addenda, Appendix D, Thickness of a Welding Tee


File: B31-00-044

Question (1): In accordance with ASME B3 1.3a-2000 Addenda, does the crotch thickness, T,, requirement for a ?welding tee? in Appendix D apply to the whole arc, from where the wall is tangent to the header direction to where the wall is tangent to the branch direction?

Reply (1): No.

Question (2): In accordance with ASME B31.3a-2000 Addenda Appendix D, does the Code specify the

Reply (2): No.

specific location where T,, for a welding tee, shall be measured?

22 1



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CODE REFERENCE INDEX

(GENERAL NOTE: Code references are based on ASME 831.3-1990 or later Editions . References in brackets are to previous Editions and Addenda.)

Subject Reference

Introduction ......................... 1.3. 1.6. 1.7. 13-04 300 ........................................ 7.10. 8.17 300(b) ............ 1.26. 1.32. 4.08. 5.03. 8.09. 10.11. 13-14 300(~) ............ 3.2. 3-4. 4.10. 6-03R (Vol . 7). 7.05. 8.30.

13.02. 16.12. 18-09 300(c) [300(e)l ............................. 1.3. 1.6. 1-7 300.1 ............................ 7.10. 8.17. 9.06. 12-20 300.1.1 ... 1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8.01. 9.02. 17-01 Fig . 300.1.1 .................... 1.8. 1.19. 2.26. 7.10. 8-17 300.1.3 [300.1.4] . . . . . . . . . . 1.8. 1.16. 1.19. 1.26. 3.2. 15-09 300.1.3(d) ....................................... 10-05 300.2

Category D Fluid Service . . . . . . . . . . . . . . . . 4.13. 5.03. 6-01 Category M Fluid Service ...... 1.40. 1.73. 6.01. 8.09. 9-02 notch-sensitive .................................. 2-22 owner ......................................... 2-30 piping components ............... 3.2. 8.01. 14.03. 17-23 piping system .............................. 1.30. 9-06 severe cyclic conditions ...................... 5-1 2. 8-09

301 5-11 301.2 ........................................ 2-3;7-O1 301.2.1 .................................... 2.29. 13-1 5 301.3 ....................................... 2.3. 17-07 301.3.1 ......................................... 10-02 301.3.2 .......................................... 4-11 301.5.3 .......................................... 4-07 301.7.2 ........................................... 3-4 302 ............................................. 1-32 302.2 ............................................ 1-50 302.2.1 ......................................... 16-18 302.2.2 ......................................... 17-11 302.2.4 [302.2.3] ...... 1.3. 1.32. 2.14. 3-4. 4.11. 7.01. 7.04.

8.04. 14.09. 17-12 302.2.5 ......................................... 13-15 302.3.2 .......... 1-1 8. 1.38. 2-1 6. 3-1 3. 8.25. 11 .05. 16-04 302.3.4 .................................... 2.20. 17-14

a .............................................

Table 302.3.4 ...................... 1.42. 1.78. 2.20. 3-1 1 302.3.5 ........ 1.20. 1.50. 2.14. 2.15. 2.24. 3.4. 4.10. 4.12.

6-03R (Vol . 7). 6.07. 7.04. 7.05. 8-1 6. 15-1 5. 16-1 1. 17.04. 17-1 8. 18-1 6

Table 302.3.5 .................................... 16-10 302.3.6 ........................... 1.50. 2.15. 2.16. 2-17 302.4 ............................................ 1-20 303 ............................................. 6-05 304.1.1 ........ 1.42. 1.54. 1.70. 13.07. 15.06. 15.10. 16-14 304.1.2 . . . . . . . . . . . . . . . . 1-42. 1.57. 1.68. 1.70. 2.11. 10-20 304.2 ........................................... 15-14 304.2.2 . . . . . . . . . . . . . .......................... 18-06

Subject Reference

304.2.3 ..................................... 1.22. 5-11 Fig . 304.2.3 ....................................... 1-22 304.3 ............................. 1.21. 1-46. 5-01. 6-09 304.3.2 .......................................... 4-05 304.3.3 ......... 4.03. 7.02. 8.06. 8.37. 11.10. 12.05. 14.10.

15.05. 17-26 Fig . 304.3.3 ....................................... 8-37 304.3.4 ...................... 1.21. 1.37. 1.55. 1.75. 2-27 Fig . 304.3.4 ....................................... 1-70 304.3.5 ......................................... 12-13 304.5 .................................. 3.4. 9.07. 10-14 304.5.1 .......................................... 8-18 304.5.1 (b) ........................................ 9-10 304.7.2 ....... 1.51. 3.2. 4.05. 5.05. 5.11. 6.09. 10.7. 10.11.

10.18. 12.09. 13.02. 13.03. 13.05. 13-11 304.7.4 .......................................... 1-16 305.2 ......................................... 3.8. 3-9 305.2.1 .......................................... 1-38 305.2.3 ..................................... 6.01. 7-03 306.4 ........................................... 12-16 306.4.2 ......................................... 11-03 308.2.1 .......................................... 5-12 308.2.4 .......................................... 5-12 31 1.2.4 ..................................... 6.02. 6-05 311.2.5 ......................................... 10-04 312 ............................................. 9-07 314.2.1 .......................................... 2-22 Table 314.2.1 ............................... 8.33. 11-16 315.2 ............................................. 3-6 315.3 ............................................. 3-6 317.2 ............................................ 1-17

Table 319.3.6 ..................................... 9-01 319.2.1 .......................................... 2-17

319.3.1(b) ....................................... 15-24

318 ............................................. 8-13

319.2.3 ......................... 7.04. 7.05. 12.06. 18-13

319.3.5 .......................................... 4-10 319.3.6 . . . . . . . . . . . . . . . . . . 1.6. 1.7. 1.55. 2.24. 5.15. 13-05 319.4.1 .................................... 1.33. 13-14 319.4.4 ................................. 1.71. 2.7. 2-24 319.7 ....................................... 1.16. 7-05

321.1.4 .......................................... 1-49 321.1.1 .......................................... 6-07

322.3 ........................................... 17-24 322.6.1 ................................... 10.10. 12-18 322.6.3 ............... 1.32. 2.21. 2.29. 7.01. 12.04. 14-09 323.1.1 ................................... 8.19. 17-09R 323.1.2 ....... 1-1 1. 1.15. 1-48. 2.1. 6.06. 8.07. 8.19. 11.03.

15.04. 17.01. 17-08

Cumulative Index . 831.3 Interpretations Vols . 1-1 8



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Subject Reference

323.2 ............................................. 3-9 323.2.1 .......................................... 1-13 323.2.2 ................................... 15-12, 15-25 Fig . 323.2.2 ...................................... 14-08 Table 323.2.2 [Table 323.2.11 ......... 1-12, 1-48, 1.65, 1.76.

2-1 9, 3-8. 4-01. 4-1 5. 14-1 2, 15-1 1, 15-1 6. 18-1 2, 17-09R 323.2.4 .......................................... 6-06 323.3 ....................................... 1.76. 5-13 323.3.2 ......................................... 11-12 Table 323.3.1 rable 3232.21 .............. 1-12, 1.76, 4-17,

5-19, 5-21, 8-29, 10-2, 11-12. 15-23 323.3.4 .......................................... 8-30 323.3.5 ........................................... 2-9 323.4 ........................................... 15-03 323.4.2 ................................... 10-01, 10-19 Table 323.3.5 ..................................... 5-14 Table 326.1 .................... 1-1 1. 1-51, 2-3, 8-07. 8-34 328 ....................................... 7-02, 12-12 328.1 ........................................... 12-07 328.2 I327.51 ......................... 1-66, 11-09. 14-13 328.2.1 I327.5.1, 327.5.21 ................ 1-76. 4-17. 8-29 328.2.20 ....................................... 14-05 328.2.3 ................................... 15-19, 18-08 328.4 ........................................... 13-01 328.4.2 and Fig . 328.4.2 ........................... 12-10 328.4.3 ......................................... 14-04 Fig . 328.4.4 .................................. 8-28, 9-08 328.5 1327.41 ..................................... 5-09 328.5.1 I327.4.11 .................................. 5-17 328.5.2 [327.4.21 ............................ 5-12, 16-06 Fig . 328.5.2 [Fig . 327.4.21 ....... 1-28. 5-12. 6-02, 6.05, 8-27,

15-08 328.5.4 r327.4.41 ......... 1-59, 1-74. 2-10, 4-03, 4-14, 7-08,

8-13, 10-04, 13-1 1 Fig . 328.5.4 [Fig . 327.4.41 ....... 1-59. 1-74, 4-03, 4-16, 7-08 328.6 ............................................ 2-18 330 ............................................. 8-21 330.1 ............................................ 8-23 Table 330.1.1 ..................................... 9-05 331 ............................................. 8-12 331.1.1 ............................... 8-08, 9-05, 14-01 Table 331.1.1 [Table 331.3.11 .......... 1-69, 2-2, 5.06, 8-24. 331.1.2 .......................................... 8-05

9-03. 12-14, 14-1 6, 17-01

331.1.3 (331.3.61 ........ 1-39, 1-59. 4-06, 5-06, 9-03, 11-06, 14-01, 15-1 8. 17-21, 17-1 3, 18-02

331.1.4 1331.1.21 .................................. 5-08 331.1.6 1331.3.41 ............................ 5-08. 16-09

331.2 ........................................... 16-04

331.3.4 .......................................... 8-05 331.3.7 .......................................... 8-05 332.1 ............................................ 8-03

332.2.2 ......................................... 16-08

331.1.7 I331.3.21 ............................. 1.78. 8-22

331.2.2 I331.1.11 ............................. 1.39, 1-78

332.2 L329.11 ...................... 1-23. 1-53, 4.02. 8-20

332.4 1329.3, 330-21 ................................ 2-2 332.4.2 ................................... 11-03. 15-17 335.1.1 ................................... 15-07. 17-25 335.2 ............................................. 2-5

Subject a Reference

335.2.3 ......................................... 17-20 340.2 I336.1.21 ................................... 1-26 340.3 [336.3] ............................... 1.10. 10-03 340.4 I336.21 ............................... 1.31. 17-15

341.2 [336.1.1, 336.1.31 ....... 1.10, 1.26. 1.27. 2.28, 10-03 341.3.1 [336.5] ............................... 1-64. 2-4 341.3.2 .......................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 ..................... 5.09, 13-16 Table 341.3.2 ...... 14.02, 14.07. 14.15. 16.07, 17.03. 17.22,

[Table 327.4.1Al ........... 1.1, 1.9, 1.14, 1-41, 2.8. 5.04,

[Table 341.3.2Al ........... 8.32, 8.38, 9.04, 11.08. 11.14.

341 ...................................... 10.16, 15-13

18-07

5-1 3, 5-1 6. 5-1 7. 5-1 8, 5.20, 6.04, 7-06

12.22. 13-1 6 341.3.3 ......................................... 14-14 341.3.4 1336.5, 336.5.41 ......... 1.62. 2.25, 2.32, 3-5. 3.14,

10.09. 10-1 2. 1 1.02. 1 1.04. 13-1 2. 16.01. 16.02, 16.05, 18-01

341.4 [336.5] ................ 1.24, 1-45. 3.12. 5.20. 11-01 341.4.1 [336.5.1] ......... 1.10. 1.26. 1.27. 1.60, 2.12, 2.28.

3.7, 3.12, 4.12, 5.10, 8.02. 8.10, 8.26. 10.03, 10.17, 11.11, 11.14, 11.15. 18-14

341.4.2 .......................................... 8-38 341.4.3 .......................................... 8-10 341.5 ............................................ 8-38 341.5.1 [336.6.11 .............................. 1-5, 3-12 342 ............................................ 15-21 342.1 [336.4.1] ................................... 2-28 343 1336.4.11 ..................................... 2-28 344 1336.41 ........................... 5.09, 16.13, 18-11 344.1 ........................................... 13-12 344.2 I336.4.21 ....... 2.28. 8.10. 8.26. 11.11. 15.21. 18-17 344.5 [336.4.5] ......................... 1-1 O. 1.60, 2-1 2 344.6 [336.4.61 ................................... 1-60 344.6.2 ......................................... 10-17 344.7 1336.4.71 ........................ 2.28, 3.14, 12-01 344.7.1 ......................................... 1 1 - 1 1 345 13371 .......... 1.2, 1.72, 2.31. 3.3, 8.31, 16.03, 17-30 345.1 [337.1] ............ 1.4, 1.30. 4.04, 6.08, 8.15. 12-21 345.2.2 .................................... 8.31. 18-10 345.2.3(¡). ....................................... 17-28 345.2.4 [337.4.31 .................................. 1-35 345.2.6 [337.1] ............................... 1.2, 5-22 345.3 f337.31 ...................... 2.6, 3.10, 5.02, 12-03 345.4 ............................................ 8-04 345.4.1 ......................................... 12-19 345.4.2 [337.4.1] ......... 1.35. 1.61, 1.63. 2.23. 4.04. 9.09.

13.13, 18-03 345.4.3 (337.4.21 .................................. 1-63 345.5 1337-4.41 ............. 1.35, 1-43. 6.08. 11.07, 13-06 345.5.2 ......................................... 11-19 345.5.4 ......................................... 12-02 345.7 (337.5.21 ................................... 1-36 345.8 1337.61 .......................... 1.25. 3.10, 17-02 345.9 f337.5.11 ........ 4.09. 5.07, 6.08, 8.15. 10.15, 12.01,

A304 ............................................ 8-14 12.21. 15.02. 17.05. 17-1 O. 18-1 5

..................................

......................................... A304.1.1 14.17. 14-18 A304.5.1 1-67

íb) Cumulative Index . 631.3 Interpretations Vols . 1-1 8



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Subject Reference

A304.7.2 ........................................ 13-08 A305 ........................................... 11-17 A314 ............................................ 8-33 A322.6 ......................................... 17-29 A323.4.2 .................................. 10.06. 11-18 A327.2.4 ......................................... 7-09 A328.2(a) ........................................ 10-8 A328.2.1 ................................... 8.14. 18-05 A328.2.5 ........................................ 1 7-06 A328.5 .............................. 8.14. 10.08, 13-08 K300(a) ......................................... 17-1 6 K304.1.2 .................................. 11.21. 14-11 K314.2 .......................................... 17-19 K315 ............................................ 7-07 K322.3 ........................................... 7-07 K328.2.1 (a) ...................................... 17-27 Fig . K328.5.4 ..................................... 8-37 M305.1 ......................................... 12-15 M307.2 .......................................... 8-35 M322.3 ...................................... 2.13, 3.6 M323.1.3 ......................................... 3-7 M326 ............................................ 2-13 M335.4 (M335.5, M335.61 ........................... 3-6 M341.4 IM336.51 ............................. 1.24. 1-45 M341.4.1 iM336.5.11 ........................... 2.28. 3-7 M345.1 .......................................... 6-08

Reference Subject

MA306.5 ......................................... 9-02 MA323.4 ......................................... 9-02 MA323.4.2 ....................................... 8-35 Appendix A Notes (No equivalent) [(14)1 . . . . . . . . . . . . . . . 2-20

Note (1 7) ....................................... 4-18 Note (20) [(30)] .................................. 1-77 Note (57) [(2)1 ................................... 1-58

Table A-1 [Table 11 . . . . . . . . . . 1.13. 1.18. 1.29. 1.38, 1-48. Appendix A

1.77. 2.1. 3.8. 3.9. 3.13. 4.12. 4.13. 6.01. 6.06. 7.03. 8-1 1. 8-1 8. 8.25. 8.34. 8.36. 11 -1 3. 12.09. 15-01

Table A-16 [Table 11 . . . . . . . . . . . . . . 1.78. 2.20.4.18. 7-03 Appendix D .......... 1.6. 1.7. 1.34. 1.46. 1.55. 1.56. 1.71.

2.7. 2.24. 4-1 6. 5.01. 5.15. 6.06. 12.08. 12-1 1. 12-1 7. 13.05. 18-1 8

Appendix E [Appendix KI ...................... 1.44. 5-10 Appendix F íF323.21 ............................... 1-29 Appendix G ...................................... 5-12 Appendix H ................................ 8.06. 1 1-1 0 Appendix j ........................ 1.28. 1.54. 1.75. 5-04 Appendix M ................................. 6.01. 8-09 Appendix V ...................................... 17-1 7 Appendix X. X3.1.3 ............................... 12-23 Appendix X. X3.2.2 ............................... 13-09 Appendix X. X302.2.3 ............................. 15-22 Case 137 .......................................... 3-1 Case 141 ......................................... 1-51




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SUBJECT INDEX

Subjed Interpretation No .

Acceptance Criteria

weld ............ 1.1. 1.9. 1.14. 1-41. 2.8. 5.09. 5.13. 5.17. pressure tests ....................................... 1-2

5.18. 5.20. 6.04. 7.06. 8.32. 12.22. 13.16. 14.02. 14-07

Allowable Loads ................................... 14-06

Allowable Stresses ................................. 4-1 2 bases for .............. 1.18. 3.13. 8-1 1. 8.25. 10.13. 15-01 for ASTMA 312 ................................... 1-29 for ASTM A 351 .................................. 11-13 for ASTM A 387 ................................... 8-25 for ASTMA 570 ................................... 1-38 for ASTM A 587 ................................... 1-13 for ASTM A 671 ................................... 1-48 for ASTM 8 464 ................................... 8-11 for austenitic stainless steels ......................... 3-1 3

Alterations of Piping .............................. 13-04

Alternative Tests ........................... see Leak Tests

Authorized Inspector ................. see Owner's Inspector

Bellows ......................................... 13-09

Bending ......................... 4.02. 8.03. 15.17. 16-08

Bends corrugated ........................................ 1-23 miter ................................... see Miter Bends reduction of outside diameter ........................ 8-20

Bonding Qualification Test hot gas welded .................................... 8-14 minimum burst pressure ........................ 7.09. 8-14 procedure specifications for plastic piping . . . . . . . . . . . . . 10-08 requirements ..................................... 18-05 solvent cement .................................... 8-1 4

Bonds heat fusion ....................................... 8-14 hot gas welded .................................... 8-1 4 test assembly ...................................... 7-09

Bolting Materials ............................ 4.15. 17-20

Branch Connections extruded outlets ......................... 1.37. 2.27. 6-09

Subject Interpretation No .

Branch Connections (Cont'd) flexibility analysis .................................. 9-01 integrally reinforced fining ..................... 4.05. 1 1 -1 0 projection into run pipe ........................ 8.28. 9-03 reinforcement ........ 8.06. 8.37. 12.05. 12-1 3. 14-1 O. 1 5-05 weld requirements ....... 2.10. 4.03. 4.14. 7.02. 7.08. 10.04.

13.11. 17-26

Brazed joints for flammable service ............................... 1-17

Buckles ..................................... 1.23. 1-53

Cast Irons specific requirements .............................. 10-01

Category D Fluid Service

limitations ................................... 4-1 3. 5-03 alternative pressure test for .......................... 1-36

radiographic examination ........................... 8-38

Category M Fluid Service clarification of term ........................... 1.73. 9-02 double contained piping ............................ 8-35 leak test .......................................... 6-08 liquid oxygen ..................................... 8-09 requirements ........................... 8.35. 9.02. 12-15 tubing size limitations .............................. 2-13 "very small quantity" ............................... 1-40

Code Coverage 831.3 versus 831.4 ........................... 1-47. 7-10 fired heaters ..................................... 15-09 general hydrocarbon service ......................... 6-01 in-line sensing devices .............................. 8-01 intent ........................................... 16-12 new and replacement piping ................... 5-22. 12-2 1 offshore platform .................................. 8-17 oil heating system .................................. 4-19 radioactive fluids ................................. 12-20 synfuel plant piping ........................... 1-52. 2-26 tobacco plant piping ................................ 3-1

Components (see also Fittings. Flanges. Standard Components.

certification ........................ 1.26. 3.7. 5.10. 13-1 0 defining ......................................... 17-23 design conditions ................................... 2-3 fabricated or flared laps ...................... 1 1.03. 12-1 6 in-line sensing devices .............................. 8-01

Unlisted and Valves)




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Components (see also Fittings. Flanges. Standard Components.

referenced standards .......................... 1-44. 5-1 O Unlisted and Valves) (Cont’d)

Compressors

internal piping ..................................... 1-8

Corrugated Bends ................................. 1-23

Cyclic loading .............................. 5-1 2. 17-04

Design (see also Pressure Design)

conditions ................................... for stainless bellows ........................... Lame theory ................................ minimum temperature ........................

additional design considerations . . . . . . . . . . . . . . . . .

Displacement Stress ............... 2.14. 2.24.

Earthquake .................................

.... 12-13

...... 2-3

. . . . 12-23

..... 1-57

.... 10-02

2.06. 18-1 3

see Seismic

Empty System transportation ..................................... 9-06

Examination acceptance criteria ................................ 16-07 extent of .............................. 1.24. 5-1 8. 11-01 in-process .................................. 3-1 4. 1 1-1 5

progressive .................... see Progressive Examination radiographic ................. see Radiographic Examination random ........... 1.27. 145. 1.62. 2.12. 2.32. 4-1 2. 11 -1 5 records ......................................... 1 1-1 1 required . . 1.24. 1.60. 6.04. 11 -1 4. 1 1-1 5. 15-1 3. 15-2 1. 18-1 4 severe cyclic conditions ...................... 10-1 7. 1 1 -1 4

types ..................................... 16.13. 18-11 visual ............................. see Visual Examination ultrasonic ...................... see Ultrasonic Examination

liquid penetrant ........... see Liquid Penetrant Examination

Spot ............................................. 1-62

Exclusions for compressors and internal piping .................... 1-8 for interconnecting piping ........................... 1-1 9 listed in scope ..................................... 10-5

Expansion Joints ....................... 1-1 6. 12.23. 13-09

Extruded Outlet pressure design of ............................. 1.21. 1-70 tees considered as ................................. 1-55

Extruded Welded Tee .............................. 5-01

Fatigue ......................................... 18-09


Fillet Weld internal. slip-on flange .............................. 8-27 pressure containing ................................ 8-13 size ............................................. 1-74 use .............................................. 1 0 4 Fittings

conforming to two grades ........................... 8-18 flared. flareless. or compression types ............ 3.6. 12-16

616.9 ........................................ 1.7. 5.01

MSS SP-75 ....................................... 1-11

Flammable Service ................................. 1-17

Flanges assembly .......................................... 2-5 design ................................... 1.67. 3-4. 9-7 general .......................................... 9-10 long welding neck ................................. 4-05

use of aluminum ................................... 1-51 use of raised and flat face metallic .................... 9-07

slip-on ...................................... 5.12. 8-27

Flexibility Analysis branch connections ................................ 9-01 exemptions from ................................... 1-33 qualification ............................... 13.05. 13-14 thermal expansion data ............................ 15-24

Flexibility Characteristic effect of branch to run diameters ..................... 1-56 for a tee ................................ 1.55. 1.56. 5-01 for components not listed in Appendix D . . . . . . . . . 1.55. 2-24

Flexibility Factors basis for .......................................... 1-56 for 61 6-9 tee ........................... 1.7. 12.08. 12-1 7 for fabricated intersections .................. 1.6. 4-1 6. 5-1 5 for pressure piping components ..................... 13-05 for welded elbows .................................. 1-6

Fluid Service general hydrocarbon ............................... 6-01 requirements. metallic ........... 11.16. 12.15. 12.16. 15-03 requirements. nonmetallic .................... 1 1-1 7. 11 -1 8 responsibility for categorizing . . . . . . . . . . . . . . . . . . . 4.08. 8-09

Graphitization temperature relative to onset ......................... 1-58

Hardness limitations on ...................................... 2-2 records .......................................... 8-22 testing .......................................... 15-20

Heat Fasion Joints ................................ 13-08

Heat Treatment

for austenitic stainless steel .......................... 1-65 cooling rate ....................................... 1-69

Cumulative index . 631.3 Interpretations Vols . 1-1 8



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Heat Treatment (Cont'd) for bending and forming ............................. 2-2 for flared laps .................................... 11-03 for valve parts ..................................... 8-12 governing thickness ........... 1.39. 1.59. 4.06. 5.06. 1 1-06 heating rate ....................................... 1-69 local ....................................... 5.08. 8-05 monitoring .................................. 5.08. 8-05 requirements ....... 8-08. 8.21. 8.23. 8.24. 9.03. 9.05. 12.14.

SP-1 through SP-5 ................................. 8-24 when radiography is required .................... 1.64. 2-4

Hydrostatic Tests .......................... s e e Leak Tests

14.01. 14-1 6. 15-1 8. 18-04

Impact Tests

alternative methods ................................ 8-30 base metal ............................ 4.01. 11.12. 18-12 exclusions from ......................... 1.76. 5-1 4. 8-30 heat treatment required ............................. 5-19 in qualifying procedures ............................ 8-29 of aluminum filler metals ............................ 2-19 of austenitic stainless steel ........................... 1-65 of bolting materials ................................. 4-1 5 of the heat-affected zone ....................... 1.76. 5-21 of weldments ...................... 1-1 2. 1.65. 1.76. 5-21 requirements ............................... 15.23. 7 7-09 temperature limitation ................... 5.14. 8.30. 14-1 2

absorbed energy data ................................ 2-9

Imperfections (see also Acceptance Criteria) concave root surface ........................... 1.1. 6-04 determination of ................................... 8-32 lack of fusion ..................................... 5-09 porosity ............................ 1.9. 5.13. 5.16. 5-20 slag inclusion ..................................... 5-20 tungsten inclusions ............................. 1.9. 5-1 7 undercutting ............................. 1.14. 2.8. 6-04

Installed Piping .................................... 1-30

Instrument Piping ............................. 7.07. 8-01

Internal Piping, Equipment ........................... 1-8

Joint Factors for ASTM A 234. ASTM A 312. ASTM A 403 . . . . . . . . . . . for branch connections ............................. for circumferential welds ............................ for longitudinal and spiral welds ...... 1.78. 3-1 1. 8.06.

2-20 8-06 1 -42 7-1 4

joints alignment ................................. 15.07. 7-25 circumferential bends ............................... 5-1 1 exposed during test ............................ 2.6. 3-1 O instrument tubing .................................. 7-07 special ........................................... 8-13 tapered pipe thread ............................... 16-1 5 threaded .................................. 1 1-1 6. 17-1 9

Interpretation No . Subject

lateral Fittings ..................................... 1-6

leak Tests acceptance criteria ...................... 1 .2. 15.22. 16-03 alternative . . . . . . . 4.09. 5.07. 6.08. 8.15. 12.01. 12.21. 17.05.

17.10. 18-15 as nondestructive examination ....................... 8-31 for Category D fluid service .......................... 1-36 for system designed for O psi ......................... 2-31 isolation of test pump ................................ 1-2 leakage ........................................... 1-4

minor repairs and additions ........................... 1-2

of piping and vessel ................................ 1-63 of piping connecting equipment ....................... 3-3

painting before test ........................ 2.6. 3.10. 5-23

minimum hydrostatic test pressure ............... 2.23. 4-04

of discharge piping ................................. 1-72 of newly constructed systems .......... 1-4. 5.02. 5.22. 8-15

of replacement piping ........................ 5.22. 12-21

personnel qualification .............................. 8-31 pneumatic test ................. 11.07. 11.19. 12.02. 13-06 preparation for . . . . . . . . . . . . . . . . 2.6. 3.10. 5.02. 5.23. 12-03 reduced pressure (hydrostatic test) ......... 1.61. 2.23. 13-1 3 requirements ................................ 8-1 5. 13-1 3 sensitive ................................... 1.25. 17-02 temperature correction for ...................... 1.35. 1-43 test fluid ........................................ 12-19 test pressure ..................................... 12-04

lethal Substance .................................. 1-73

limitations on hardness ........................................ 2-2 on imperfections ......................... see Imperfections on tubing size ................................. 2.13, 3-6

liquid Penetrant Examination requirements ..................................... 11-14

low Temperature Requirements ............ see Impact Tests

Materials API 5L ..................... 1.78. 2-4. 3.9. 3.11. 6.01. 6-06 API 5LX ..................................... 2.4. 11.05 ASTMA234 ...................................... 2-20 ASTM A 312 ............................ 1.29, 1.77, 2-20 ASTM A 351 ..................................... 11-13 ASTMA 387 ...................................... 8-25 ASTMA403 ................................. 1.77. 2.20 ASTM A487 ...................................... 8-07 ASTMA537 ....................................... 2-1 ASTM A 570 ...................................... 1-38 ASTMA 587 ...................................... 1-13 ASTMA633 ...................................... 1-11 ASTMA658 ....................................... 3-8 ASTM A 671 ...................................... 1-48 ASTM 6 241 ...................................... '2-19 ASTMB 337 ...................................... 4-18 ASTM 6 464 ...................................... 8-11

(9 Cumulative Index . 631.3 Interpretations Vols . 1-18



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.

Interpretation No . Subject Interpretation No .

Materials (Cont’d) austenitic stainless steels ............................ 3-1 3 bases for design stresses ............................ 1 1-05 certification ............................ 5-1 O. 8.02. 13-1 O conforming to two grades ...................... 8-1 8. 8-34 listed .................................... 17.09R. 17-1 1 notch sensitive .................................... 2-22 reidentification .................................... 8-1 9 toughness requirements ............................. 5-1 9 unlisted material . ......... 1 1.05. 1 1.20. 15.04. 17.01. 17-08

Miter Bends pressure design of ............................. 1.22. 5-1 1

Near Straight Sawtooth Runs explanation of ..................................... 1-33

Nomenclature d ............................................... 1-54 T ............................................... 1-28 t” ............................................... 1-75 Tw ......................................... 5-04, 5-16

Nonmetallic Piping fluid service requirements .................... 11-1 7. 11 -1 8 in Category M Fluid Service ......................... 8-35 joint requirements ............................ 7.09. 8-14 pressure design ............................. 14-1 7. 14-1 8

Notch Sensitive materials ......................................... 2-22

Occasional Variations (Pressure/Temperature Allowances) . . . . . . . . 1.3. 2-1 4. 4-1 1

loads ............................. 1.50. 2.15. 2.16. 2-17

Owner responsibilites ........................... 1.26. 2.30. 5-22

Owner’s Inspector qualifications of ................................... 1-31 responsibilities of .................................. 1-26

Pipe alterations of existing pipe .................... curved and mitred segments .................. elbowless ................................. in corroded condition ....................... instrument ................................. made from plate ............................ of noncircular cross section . . . . . . . . . . . . . . . . . . . pressure design ............................. pressure testing ............................. spiral welded .............................. straight. under internal pressure . . . . . . . . . 10-20.

. . . . . . 13-04 15.14. 18-06 ....... 8-03 ....... 2-15 ...... 17-24 . . 1.48. 8-36 . . . . . . . . 3-2 13.07. 14-09 ....... 9-09 ....... 7-03 . 11.21. 14-11

Pipe Supports configurations ..................................... 6-07

Pipe Supports (Cont’d) longitudinal stress effects ............................ 7-05 use of plastic ...................................... 1-49

Plastic lined pipe . use of screwed flanges ................... 8-33 pipe supports ..................................... 1-49

Pneumatic Tests ........................... see Leak Tests

Positions qualification of welding ............................. 1-66

Postweld Heat Treatment ............... see Heat Treatment

Preheat .............................. see Heat Treatment

Pressure Design allowance ....................................... 17-12 for elevated temperatures ............................. 3-4 in the high pressure range ..................... 1.68. 17-16 of extruded headers ........................... 1.21. 1-70 of flanges and blanks ........................ 10.14. 13-15 of miter bends ..................................... 1-21 of nonmetallic piping components ............. 14-1 7. 14-18 of pipe . . . . . . 1.42. 1.54. 1.57. 1.68. 1.70. 2.11. 11.21. 13.07.

of listed components ........................ 16-1 4. 16-1 8 of unlisted components ................ 13.02. 13.03. 13-05 of valves ................................... 8.04. 13-15

15.06. 15-1 O. 17-06

Pressure Rating valve ............................................ 8-04 variations ......................................... 4-11

Pressure Relief Devices acceptable devices ............................ 2.21. 2-29

requirements ..................................... 17-29 setting ................................ 1.32. 7.01. 12-04 stop valves ................................ 10-1 O. 12-1 8

Pressure Surges loads due to ...................................... 1-50

and test pressure .......... 1 1.07. 11 -1 9. 12.04. 14.09. 18-03

Pressure-Temperature Rating ................... 5.05. 8-34

Pressure Test .............................. see Leak Test

Progressive Examination ........ 1.5. 1.62. 3.5. 10.09. 10-1 O. 10-1 2. 1 1.02. 11 .04. 13-1 2. 16.01. 16.02. 16.05. 18-01

Published Specification ............................. 1-15

Radiographic Examination

as supplementary examination ....................... 8-38 random radiography ....... 1.27. 1.45. 1.62. 2.12. 2.32. 3-12

100% ............................................ 5-09




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Subject

Radiographic Examination (Cont’d) records ............................... requirements .................... 6.04. selection of welds for examination ........ spot radiography ....................... when PWHT is required .................

Interpretation No .

........... 1-10 1-01. 11.05, 12-03 ........... 2-25 . . . . . . 1.62. 3-12 . . . . . . . 1.64. 2-4

Records certification ............................ 5-1 O. 8.02. 10-03 for radiographic examination ......................... 1-1 O of examinations .................................. 11-1 1 of hardness tests ................................... 8-22 retention of ....................................... 1-1 O

Reinforcement. Branch attachment weld .............................. 4.03. 7-08 clarification of terms ......................... 1.37. 1 1-1 O limitsof ..................................... 2.27. 9-04

Repairs to welds ......................................... 2-18

Responsibility designer ......................................... 10-1 1 rights of owner’s inspection ................... 10.03. 17-1 5

Safeguarding ...................................... 5-1 2

Scope ............................... see Code Coverage

Seismic loads ..................................... 4-07 stresses due to ..................................... 2-1 7

Severe Cyclic Conditions cyclic loading ..................................... 5-1 2 large rapid temperature change ....................... 8-09 spiral welded pipe ................................. 7-03

Simplified Flexibility Analysis ........................ 1-33

Standard Components manufacturers markings ......................... 3.7. 8-02 valves ................................. 5.05. 8.04. 8-07

Standards compliance ....................................... 5-10 superseded ....................................... 1-44

Stresses (see also Allowable Stresses) displacement stress range ..................... 7.04. 12-06 due to cold spring ................................. 8-1 6 due to occasional loads ............................. 2-1 6 due to pressure surges .............................. 1-50 due to seismic loads ................................ 2-1 7 due to sustained loads . . . . . . . . . . . . . . . . . 15-1 5. 16.04. 16-1 1 due to thermal gradients ............................. 3-4 longitudinal . . . . . . . . . . . . . . 1.20. 1.50. 2.15. 2.24. 4.10, 4.12.

6-03R (VOI . 7). 6.07. 7.05. 8-1 6. 17-1 8. 18-1 6

Subject a Interpretation No .

Stresses (Cont’d) reduction factors .................................. 16-10

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . 1.34. 2.24. 6-03R (Vol . 7) basis for .......................................... 1-56 branch connections ........... for B 1 6.9 tees ................ for fabricated intersections ...... for tees ............... 1-46. for unlisted components ........ for welded elbows ............

..................... 2-7

..................... 1-7

................ 1.6. 5-15

.55. 1.71. 5.01. 12.08. 12-1 7

................... 13-05

............... 1.6. 12-11

Temperature allowance ....................................... 17-12 bending ......................................... 16-08 design minimum temperature . . . . . 10.02. 14.08. 14-1 2. 15-1 1.

large changes ..................................... 8-09 limitations ....................... 4.13. 5.14. 15.12. 15-25 reduction ......................................... 4-11 verification ...................................... 16-09 variation in elevated temperature service .............. 17-1 7

15.16. 17-07

Thermoplastic Piping neat fusion joints ................................. 13-08 solvent cemented joints ............................. 10-8 specific requirements .............................. 10-06

Tubing category M fluid service ............................ 16-1 7 joints ............................................ 7-07 limitations .................................... 2.13. 3-6

Thickness Allowances governing ........................... 17-1 3. 1 7-2 1. 18-02 in stress calculations ............................... 1-20 welding tee ...................................... 18-18

Ultrasonic Examination in place of radiography ............................ 11-05 requirements ..................................... 10-1 7

Unlisted components .... 1.6. 1.51. 3.6. 4.05. 5.05. 8.7. 10.18. 10.11.

10.07. 12.09. 13.02. 13.03. 13-05 materials .................................. see Materials

Valves Category M Fluid Service ............................ 8-35 Flanged Bail Valves ............................... 16-16 materials ................................... 8.07. 15-26 pressure build up .................................. 8-04 ratings ........................................... 5-05

Visual Examination internal ............................... 8.10. 8.26. 13-16 requirements .................... 2.28. 10.03. 13-1 6. 18-1 7

Cumulative Index . 831.3 Interpretations Vols . 1-18



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Interpretation No .

Washers. Use of .................................... 2-5

Weld acceptance criteria .................... 17.03. 17.22. 18-07 bevels .......................................... 12-10 definition ........................................ 14-03 examination of welds ...... 10-1 5. 1 1 .01. 1 1-1 4. 13-1 6. 14-1 4.

fillet size ............................. 1.74. 10-1 9. 16-06 for branch connections . . . . . . . . 2-1 O. 4.03. 4.14. 8.37. 1 1-1 O imperfections ..................... see Acceptance Criteria longitudinal ............................. 2.20. 3-1 1. 4-1 8 of valves ........................................ 12-1 2 preparation for welding ...................... 13.01. 14-04

14-1 5. 15-02

Subject Interpretation No . qualification of position ............................. 1-66 reinforcement ............................... 7.08. 1 1-08 repair ............................................ 2-18 socket .................... 6.02. 6.05. 10.19. 15.08. 16-06 spacing of ........................................ 7-02

Welder Qualification by others .................................. 15-1 9. 18-08 requirements ..................................... 17-27

Welding Procedure qualification of ...... 1.12. 1.65. 1.66. 1.76. 4.17. 8.23. 8.29.

responsibility ............................... 12.07. 12-12 specification ................................. 8.21. 8-22

11.09. 14.05. 14-13




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A3799B



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111 0757670 0637653 bL7 IBI

ASME B31.3


Replies to Technical Inquiries April 1,198 Through November 31, 1W

General Information



ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might ‘affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,” “certify.” “rate,” or “endorse” any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the 8 3 1 Committee, refer to Appendix Z.



L

197



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Suhjeci .

H 0759670 0637652 5T3 m

B31.3

Appendix V . Allowable Variation in Elevated Temperature Service ................. Para . 3OíI.2. Deiiiiing Piping Components ...................................... Para . 301.3, Design Teinperatures ............................................ Para . 302.2.2, Listcd Components Not Having Specitic Ratings .................... Paru . 302.2.4. Allowances for Pressure and Temperature Variation ..................

and Displacement Strains ..................................................

Para . 322.3. Insirumcnt Piping ............................................... Para . 323.1. I , Listed Materials ............................................... Para . 323 . I .2, Unlistcd Materials and Unlisted Components for Metallic

Piping Lincd With Nonmetals ............................................. Para . 323.1.2. Unlisted Materials ............................................. Para . 331.1.3, Governing Thickness ...........................................

Para . 335 . I . I(c) . Alignment of Flanged Joints ...................................

Para . 340.4, Qualification of the Owner's Inspector .............................. Para . 345 . Tcsiing .........................................................

Pira . 345.8(h), Scnsiiive Leak Test ........................................... Para . 345.9. I(a). Alternative Leak Test Examination of Welds ..................... Pdra . 345.9.1(h). Alternative k i k Test Examination of Welds ..................... Para . A322.6. Pressure Relieving Devices ...................................... Para . A328.2.5(b)( I ). Qualification Test Pressure ................................ Para . K3OO(a) . Applicability of High Pressure Piping ............................ : Para . K314.2. Special Threaded Joints ......................................... Para . K328.2. I(a). Welding Qualification Requirements ............................ Tahle 302.3.4. Longitudinal Weld Joint Quality Factor ........................... Tahle 341.3.2, Accepiance Criteria for Welds ................................... Tahle 341.3.2, Accepiance Criteria for Welds ...................................

Para . 302.3.5(c), Longitudinal Stress .......................................... Para . 302.3.5(d). Limits of Calculation Stresses Due to Susiained Loads

Pura . 304.3.3. Reinforcement of Welded Branch Connections ......................

Paru . 331.1.3. G«verning Thickness ..............

Paru . 335.2.3. Bolt Length ..................................................

Para . 345.2.3íc). Special Provisions for Testing of Closure Welds ..................

.........................

Interpretation

17-17 17-23 17-07 17-1 I 17-12 17-18 17-04

17-26 17-24 17-09 17-08

17-0 I 17-13 17-2 I 17-25 17-20 17-15 17-30 17-28 17-02 17-10 17-05 17-29 17-06 17-16 17-19 17-27 17-14 17-22 17-03

File No .

8 3 1-98-026 8 3 1 2 1-99-0 83 1-98-006 B 3 1 7 1-98-0 B31-98-019A B3 1-99-004 8 3 1-97-048 '

B3 1-99-022 83 1-99-013 83 1-98-009 83 1-98-08

83 1-97-044 B3 1-98-020 B 3 0 1-99-01 B3 1-99-030 83 1-99-009 B3 1-98-023 83 1-99-028 B3 1-99-025 B3 1-97446 B31-98-01 1 B3 1-97-049 B3 1-99-027 8 3 1 1-98-00 B3 1-98425 B3 1-99-08 B3 1-99-024 B31 -98-022 831-99-011 83 1-97-047

199



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Subject: ASME B3 I .3b- I997 Addenda, Para. 323. I .2, Unlisted Materials


File: B3 1-97-044

Question ( i ) : In accordance with ASME B3 I .3b- 1997, does Table 30.1.1 apply to materials that are

Reply (i): Yes.

not listed in Table A-I but are listed in ASME BPVC Section IX?

Question (2): In accordance with ASME B3 I .3b- 1997, does Table 33 I . I . 1 apply to materials that are

Reply (2): Yes, unless the provisions of para. 33 I .2.2 are satisfied.

not listed in Table A-I but are listed in ASME BPVC Section IX?


Subject: ASME B3 I .3b-1997 Addenda, Para. 345.8(b), Sensitive Leak Test


File: B3 1-97-046

Question: in accordance with ASME B3 I .3b-1997, para. 345.8(b), must the test pressure for a sensitive

Reply: No.

leak test be greater than 15 psi?


Subject: ASME B3 1.3b- I997 Addenda, Table 341.3.2, Acceptance Criteria for Welds


File: B3 1-97-047

Question: In accordance with ASME B31.3b-1997, Table 341.3.2, is the maximum allowable height of reinforcement or internal protrusion, in any plane through the weld, listed in "L" for each face of the weld?

Reply: Yes. See also Interpretation 9-04.

20 I



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Ii.. . *q& ' ' .- 0757670 ObL7b54 37b m8



Subject: ASME B3 I .3b-1997 Addenda, Para. 302.3.5(d), Limits of Calculation Stresses Due to Sustained Loads and Displacement Strains


File: B3 1 -97-048

Question ( 1 ): In accordance with ASME B3 I .3b- 1997, para. 302.3.5(d), may the number of cycles, Ni,

Reply ( 1 ): Yes; however, see also Note ( 5 ) of Equation (IC) for limits on the equivalent number of full

in Equation (Id) exceed 2,000,000 cycles?

displacement cycles, N.

Question (2): In accordance with ASME B31.3b-1997, para. 302.3.5(d), Equation (Id), is it required to combine thermal displacement cycles with displacement cycles due to other conditions such as wave motion.

Reply (2): Yes.


Subject: ASME B3 1 .3- I996 Edition, Para. 345.9. 1 (b), Alternative Leak Test Examination of Welds


File: B3 1-97-049

Question: in accordance with ASME 83 1.3- I996 Edition, para. 345.9. I(b), may the liquid penetrant

Reply: Yes.

method be used to examine a weld on a magnetic material?


Subject: ASME B3 I .3- I996 Edition; Para. A328.2.5(b)( i) , Qualification Test Pressure

Date issued: May 19, 1998

File: B3 1 -98-O0 I

Question: In accordance with ASME B31.3-1996 Edition, can the pressure design thickness be used instead of the nominal thickness in Equation (27) of para. A328.2.5(b)( i), to calculate the qualification pressure'?

Reply: No.

202



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~ ~

0757670 ObL7655 202 6

B31.3 Interpretations No. 17 17-07, 17-08, 17-09


Subject: ASME B3 I .3b-1997 Addenda; Para. 301.3, Design Temperatures

Date issued: May 19. 1998

File: B3 1-98-006

Question: In accordance with ASME B3 1.3b- 1997, para. 301.3, should fire case temperature or pressures be considered to satisfy the requirements of para. 301.2, in establishing the design conditions of piping that may be exposed to an accidental fire?

Reply: The Code does not require the consideration of accidental fire cases when establishing the piping design conditions, except as required to meet the pressure relief requirements of para. 322.6.3. See also para. 300(c)(5).


Subject: ASME B3 i .3-1996 Edition, Para. 323.1.2, Unlisted Materials and Unlisted Components for Metallic Piping Lined With Nonmetals


File: B3 1-98-008

Question ( I ) : in accordance with ASME B31.3-1996 Edition, may unlisted metallic materials be used

Reply ( i ) : Yes. See para. A323.1.

in the manufacture of metallic piping components lined with non-metals?

Question (2): In accordance with ASME B3 i .3-1996 Edition, may pressure containing metallic piping components (lined with non-metals), not manufactured in accordance with a listed standard and for which the rules in para. 304 (other than para. 304.7.2) do not apply, be qualified for use under this Code?

Reply (2): Yes. See paras. A300(d) and 304.7.2.


Subject: ASME B3 1.3b- 1997 Addenda, Para. 323. i . I, Listed Materials


File: B3 1-98-009

Question ( I ) : In accordance with ASME B3 I .3b- 1997, are classes 12, 13, 22, and 23 of ASTM A 67 I,

Reply (i): Yes.

A 672, and A 691 the only listed materials in the Code for these specifications?

Question (2): Is it a requirement that listed pipe and tube materials in ASME B31.3 be hydrotested by

Reply (2): Yes. See the requirements of the listed specifications and Note (76) of Appendix A.

the manufacturer?

203



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17-10. 17-11, 17-12 . 831.3 Interpretations No. 17


Subject: ASME B3 I .3b- 1997 Addenda, Para, 345.9. i(a), Alternative Leak Test Examination of Welds


File: B3 1-98-0 I I

Question: In accordance with ASME B3 I .3b- 1997, para. 345.9. I (a), is 100% UT examination an accept-

Reply: No.

able substitute for 100% radiography?


Subject: ASME B3 1.3b- I997 Addenda, Para. 302.2.2, Listed Components Not Having Specific Ratings

Date issued: November I I , I998

File: B31-98-017

Question: In accordance with ASME B31.3b-1997, if a fitting is manufactured to ASME B16.9 and a listed material specification that includes a reference to Note (16) of Appendix A, may the user establish the pressure-temperature rating in accordance with para. 302.2.2, without applying a weld joint quality Factor in accordance with para. 302.3.4?

Reply: Yes.


Subject: ASME B3 I .3b- 1997 Addenda, Para. 302.2.4, Allowances for Pressure and Temperature Variation

Date Issued: November 1 I , I998

File: B3 I -98-0 19A

Question ( I ) : In accordance with ASME B3 I .3b- 1997, para. 302.2.4, are the ailowable variations permitted in this paragraph only applicable when the increased pressure is less than or equal to the test pressure used in accordance with para. 345'?

Reply ( I ) : Yes.

Question (2): When establishing the maximum allowable relieving pressure permitted in accordance with

Reply (2): Yes, provided the maximum relieving pressure requirements of ASME BPVC Section VIII,

para. 322.6.3(c), may the test pressure used in accordance with para. 345 be exceeded?

Division 1 are met?

\

204



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Subject: ASME 83 I .3b- I997 Addenda, Para. 33 I . 1.3, Governing Thickness

Date Issued: November I I , 1998

File: B31-98-020

Background (Question ( I )I: An integrally-reinforced branch connection fitting is welded externally to a pipe that has a wall thicker than the minimum material thickness requiring PWHT, and the branch pipe has a wall thickness thinner than the minimum material thickness requiring PWHT.

Question (la): In accordance with ASME B31.3b-1997, does the thickness of the branch pipe attiched to the branch connection fitting have any effect on whether the weld between the branch connection and the main pipe requires PWHT?

,

Reply ( I a): No.

Question ( I b): Does the weld throat thickness between the branch connection fitting and main pipe have

Reply ( I b): Yes. See para. 33 I . 1.3(a).

any effect on whether this joint requires PWHT?

Question (IC): Does the thickness of the branch connection fitting have any effect on whether this joint

Reply (IC): NO. See para. 33 I . 1.3(a).

requires PWHT?

Question (2): In accordance with ASME B31.3b-1997, para. 331.1.3, if the header has a wall thickness less than the minimum material thickness requiring PWHT, would the deciding factor for carrying out PWHT be whether the throat thickness of the joint is greater than twice the minimum material thickness requiring PWHT?

Reply (2): Yes.


Subject: ASME B3 I .3- 1993 Edition, Table 302.3.4, Longitudinal Weld Joint Quality Factor

Date Issued: November 1 I , 1998

File: B3 1-98-022

Question: In accordance with ASME B31.3-1993 Edition, is it permissible to increase Ei for ASTM

Reply: Yes. See Table 302.3.4.

A 3 I2 EFW pipe to 1 .o0 by IoO% radiography?

205



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17-15, 17-16 831.3 Interpretations NO. 17


Subject: ASME B3 I .3b- 1997 Addenda, Para. 340.4, Qualification of the Owner's Inspector


File: B3 1-98-023

Question: In accordance with ASME B31.3b-1997, may the owner's inspector and the installing contrac-

Reply: Yes, provided all requirements of para. 340.4 are met.

tor's examiner both be employed by the same organization'?


Subject: ASME B31.3b-1997 Addenda, Para. K300(a), Applicability of High Pressure Piping

Date Issued: November i 1, 1998

File: B3 1-98-025

Question ( I ) : In accordance with ASME B31.3b-1997, para. K300(a), is it mandatory that the owner of a piping system designate it as being in High Pressure Fluid Service in accordance with Chapter IX when the system pressure exceeds that allowed by ASME B 16.5, PN 420 (Class 2500) rating?

Reply ( I ) : No.

Question (2): In accordance with ASME B31.3b-1997, para. K300(a), can piping be designated by the owner as being in High Pressure Fluid Service in accordance with Chapter IX and be designed to Chapter IX, even if this results in a wall thickness that is less than that required by design in accordance with Chapters I through VI'?

Reply (2): Yes; however, when piping is so designated, Chapter IX shall be applied in its entirety.

i

206



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17-17, 17-18 831.3 Interpretations No. 17


Subject: ASME B3 1.3b- I997 Addenda, Appendix V, Allowable Variation in Elevated Temperature Service


File: B3 1-98-026

Question ( I ) : in accordance with ASME B3 I .3b-1997, when evaluating variations in elevated temperature service in accordance with Appendix V, must the design temperature established in accordance with para. 301.3 be high enough such that the corresponding allowable stress value in Table A-1 is based on creep criteria?

Reply ( I ) : No; however, if the maximum temperature experienced during the variations is where the creep properties control design, Appendix V applies. Note that the word “design” in para. V302(c) does not apply and will be deleted by errata from a future edition of the Code.

Question (2): When some varying conditions are below the creep range and some are in the creep range, does ASME B31.3b-1997, Appendix V require that conditions below the creep range be included in the calculation of the usage factor in accordance with para. V303.27

Reply (2): No. See para. V302(c).

Question (3): In accordance with ASME B31.3b-1997, when determining if Table A-1 allowable stress values are based upon creep criteria, may the maximum temperature in Tables 2A or 2B of ASME BPVC Section 11, Part D be used as the highest temperature, which is below the range of values based upon the creep criteria?

Reply (3): Yes. See Footnote 2 to para. 302.3.2.


Subject: ASME 8 3 1.3~-1998 Addenda, Para. 302.3.5(c), Longitudinal Stress

Date Issued: July I , 1999

File: B3 1-99-004

Question ( I ) : Shall longitudinal stresses due to the misalignment of piping during assembly, or intentional

Reply (I): No.

cold spring, be included as a longitudinal sustained stress in accordance with para. 302.3.5(c)?

Question (2): is it required to include the stresses due to misalignment of piping during assembly or

Reply (2): No. See para. 3 19.2.1 (c).

intentional cold spring in the calculation of displacement stress rmge in accordance with para. 3 19.2.3?

Question (3): Shall axial stresses due to the imposed displacements be considered in the evaluation of

Reply (3): Yes. See para. 319.2.3(c).

the displacement stress range‘?

207



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* -c . iiai 0759670 ObL7660 b7T W



Subject: ASME B3 i .3- 1 996 Edition, Para.. K3 14.2, Special Threaded Joints


File: B3 i -99-008

Question ( I ): In accordance with ASME B3 i .3- i996 Edition, is a hammer union, whose mate and female

Reply ( i ): No.

ends are butt welded to the piping, considered a Special Threaded Joint us defined in para. K314.2?

Question (2): In accordance with ASME B31.3-1996 Edition, can a threaded joint that does not meet the requirements of para. K314.2 be qualified for High Pressure Fluid Service in accordance with the requirements of para. K304.7.2?

Reply (2): Yes, provided the requirements of para. K314.3 are also met.


Subject: ASME B3 I .3c- I 998 Addenda, Para. 335.2.3, Bolt Length


File: B3 i -99-009

Question: In accordunce with ASME B31.3~-1998, Para. 335.2.3, if a bolt fails to extend beyond its nut

Reply: Yes.

and no more than one thread is visible inside the nut, is the bolt considered acceptably engaged?


Subject: ASME B3 I .3c- I 998 Addenda, Para. 33 i . 1.3, Governing Thickness

Date Issued: July I , i999

File: B31-99-010

Question: In accordance with ASME B31.3~-1998, para. 331.1.3, if the thicker of two components is machined before welding, in accrodance with para. 328.4.2, to match the thickness of the thinner component, is the resulting matching thickness at the weld joint used in determining the requirements for PWHT?

Reply: Yes.

i '208



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1111 0759670 0bL7bb1 50b



Subject: ASME B3 I .3c-1998 Addenda, Table 341.3.2. Acceptance Criteria for Welds

Date Issued: July I, 1999

File: B3 1-99-01 1

Question ( 1 ): In accordance with ASME B3 I .3c-1998, Table 341.3.2, is surface porosity acceptable on

Reply ( I ) : Yes.

the crown or external surface of a groove weld that is greater than y,(, in. in nominal thickness?

Question (2): In accordance with ASME B31.3~-1998, Table 341.3.2, is surface porosity acceptable on

Reply (2): Yes.

the crown of a ‘/4 in. fillet weld‘?


Subject: ASME B3 I .3c- 1998 Addenda, Para. 300.2, Defining Piping Components

Date Issued: July I, 1999

File: B3 1 -99-0 I 2

Question: In accordance with ASME B3 I .3c- 1998, are pressure containing components such as strainers, filters, knock-out pots, holding pots and other devices that serve such purposes as mixing, separating, snubbing, distributing, and metering or controlling flow included in the scope of this Code?

Reply: Yes, unless the Owner specifies another code. See definition of “piping component..” (para. 300.2)


Subject: ASME B3 1.3~- 1998 Addenda, Pdra. 322.3, Instrument Piping


File: B3 1-99-0 I 3

Question: In accordance with ASME 8 3 1 .3~- 1998, are instrument piping components (such as tubing, compression fittings, barstock valves, etc.) outside of a piping isolation valve (piping root valve) within the scope of ASME B31.3?

Reply: Yes. See para. 322.3.

209



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I 0759670 ObL7bb2 442 I h . I . .



Subject: ASME B3 I .3-1996 Edition, Para. 335. I . I (c), Alignment of Flanged Joints


File: B3 1-99-020

Question ( I ) : In accordance with ASME B31.3-1996 Edition, para. 335. I . i(c), does the specified tolerance apply to each individual flange, measured to the design plane, or to the total misalignment between two mating tlanges'?

Reply (I): It applies to each individual flange, measured to the design plane.

Question (2): in accordance with ASME B3 I .3-1996 Edition, para. 335. I . i(c). do the requirements apply

Reply (2): Yes.

to all pipe sizes and pressure rating classes?


Subject: ASME B3 I .3- 1999 Edition, Para. 304.3.3, Reinforcement of Welded Branch Connections

Date Issued:' November 16, 1999

File: B3 1-99-022

Question: In accordance with ASME B31.3-1999 Edition, can the rules in para. 304.3.3 be used for the pressure design of a Tee, machined from stock with a remaining block shape, that does not conform to a listed standard'?

Reply: Yes; however, see paras. 304.3.5 and 300(c).


Subject: ASME B3 I .3- 1999 Edition, Para. K328.2. I (a), Welding Qualification Requirements


File: B3 1-99-024 .

Question: In accordance with ASME B3 i .3- I999 Edition, para. K328.2.1 (a), must the performance

Reply: Yes.

qualification test coupons for each welder and welding operator be impact tested'?

2 I O



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~

0 7 5 ï b 7 0 0617663 389



Subject: ASME B3 I .3-1999 Edition, Para. 345.2.3(c), Special Provisions for Testing of Closure Welds


File: B3 1-99-025

Question ( I 1: Does ASME B31.3-1999 Edition, pard. 345.2.3(c) require that the described examinations be pedormed for closure welds connecting piping systems or components that have been successfully tested in accordance with para. 345?

Reply ( i ) : No. The weld may be leak tested in accordance with para. 345. I instead.

Question (2): Can weld connecting a flange to a piping system be considered a closure weld?

Reply (2): Yes, but if the weld is to be examined in accordance with para. 345.2.3(c), the flange, as well as the piping system must have been successfully tested.


Subject: ASME B3 I .3- 1999 Edition, Para. A322.6, Pressure Relieving Devices


File: B3 1-99-027

Question: Are pressure relieving devices installed in accordance with ASME B3 I .3-1999 Edition, para.

Reply: Yes.

A322.6 required to meet ASME BPVC Section VIII, Division 1, UG-I36(b)(3)?


Subject: ASME B3 I .3- 1999 Edition, Para. 345, Testing


File: B3 1-99-028

Question: In accordance with ASME B31.3-1999 Edition, para. 345, may the test pressure exceed the

Reply: Yes.

maximum allowable internal pressure, P,,,, for a miter bend in accordance with para. 304.2.3?

21 I



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075ïb70 0637664 235 E

CODE REFERENCE INDEX

(GENERAL NOTE: Code references are based on ASME 831.3-1990 or later Editions . References in brackets are to prcvious Editions and Addenda.)

Subject Reference

Introduction ......................... 1.3. 1.6. 1.7. 13-04 300 ........................................ 7.10. 8-17 300(h) . . . . . . . . . . 1.26. 1.32. 4.08. 5.03. 8.09. 10.11. 13-14 300(~ ) . . . . . . . . . . 3.2. 3.4. 4.10. 6-03R (Vol . 7). 7.05. 8.30.

13.02. 16-12 3 0 0 ( ~ ) [300(e)l ............................. 1.3. 1.6. 1-7 300.1 ............................ 7.10. 8.17. 9.06. 12-20 300.1.1 . 1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8.01. 9.02. 17-01 Fig . 300.1.1 . . . . . . . . . . . . . . . . . . 1.8. 1.19. 2.26. 7.10. 8-17 300.1.3 I300.1.41 . . . . . . . . . 1.8. 1.16. 1.19. 1.26. 3.2. 15-09 300.1.3(d) ....................................... 10-05 300.2

Category D Fluid Service . . . . . . . . . . . . . . . 4.13. 5.03. 6-01 Category M Fluid Service .... 1.40. 1.73. 6.01. ß.04. 9-02 notch-sensitive .................................. 2-22 owner ......................................... 2-30 piping components . . . . . . . . . . . . . . . 3.2. 8.01. 14.03. 17-23 piping system .............................. 1.30. 9-06 sevcre cyclic conditions ..................... 5.12. 8-09

301 ............................................. 5-11 301.2 ........................................ 2.3. 7-01 301.2.1 .................................... 2.29. 13-15 301.3 ....................................... 2.3. 17-07 301.3.1 ......................................... 10-02 301.3.2 .......................................... 4-11 301.5.3 .......................................... 4-07 301.7.2 ........................................... 3-4 302 ............................................. 1-32 302.2 ............................................ 1-SO 302.2.1 ......................................... 16-18 302.2.2 ......................................... 17-11 302.2.4 1302.2.31 . . . . . 1.3. 1.32. 2.14. 3.4. 4.11. 7.01. 7.04.

8.04. 14.09. 1 7-1 2 302.2.5 .............................. 302.3.2 . . . . . . . . . 1.18. 1.38. 2.16. 3.13. 302.3.4 .................................... 2.20. 17-14 Table 302.3.4 . . . . . . . . . . . . ....... 1.42. 1.78. 2.20. 3-1 1 302.3.5 . . . . . . 1.20. 1.50 . 2.14. 2.15. 2.24. 3.4. 4.10. 4.12.

6-03K (Vol . 7). 6.07. 7.04. 7.05. 8.16. 15.15. 10.11. 17.04. 17-18

Table 302.3.5 . . . . . . . . . ....................... 16-10 302.3.6 . . . . . . . . . . . . . . . . . . . . . . . 1.50. 2.15. 2.16. 2-17 302.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 . . . . . . . . . . . . . . . . . ........................ 6-05 304.1.1 . . . . . . . 1.42. 1.54. 1.70. 13.07. 15.06. 15-1 O. 16-1 4 304.1.2 . . . . . . . . . . . . . . . 1.42. 1.57. 1.68 . 1.70. 2.11. 10-20 304.2 ..................................

Subject

304.2.3 ..................................... 1-22. 5-11 Fig . 304.2.3 ...................................... 1-22 304.3 ............................. 1-21, 1-46, 5-01. 6-09 304.3.2 .......................................... 4-05 304.3.3 ....... 4-03, 7-02, 8-06, 8-37, 11-10, 12-05, 14.10,

15-05, 17-26 Fig . 304.3.3 ...................................... 8-37 304.3.4 ..................... 1-21, 1-37, 1-55, 1-75, 2-27 Fig . 304.3.4 ...................................... 1-70 304.3.5 ......................................... 12-13 304.5 .................................. 3-4, 9-07, 10-14 304.5.1 .......................................... 8-18 304.5.1 (b) ........................................ 9-10 304.7.2 . . . . . 1-51, 3-2, 4-05, 5-05, 5-11, 6-09, 10-7, 10-11,

10-18, 12-09, 13-02, 13-03, 13-05, 13-11 304.7.4 .......................................... 1-16 305.2 ......................................... 3-8, 3-9 305.2.1 .......................................... 1-38 305.2.3 ..................................... 6-01, 7-03 306.4 ........................................... 12-16 306.4.2 ......................................... 11-03 308.2.1 .......................................... 5-12 308.2.4 .......................................... 5-12 31 1.2.4 ..................................... 6-02. 6-05 311.2.5 ......................................... 10-04 312 ............................................. 9-07 314.2.1 .......................................... 2-22 Table 314.2.1 ............................... 8-33. 11-16 315.2 ............................................. 3-6 315.3. ............................................ 3-6 317.2 ............................................ 1-17 318 ............................................. 8-13 Table 319.3.6 ..................................... 9-01 319.2.1 .......................................... 2-17 319.2.3 ............................... 7.04. 7-05. 12-06 319.3.1(b) ....................................... 15-24 319.3.5 .......................................... 4-10 319.3.6 . . . . . . . . . . . . . . . . . 1-6. 1-7, 1-55, 2-24, 5-15. 13-05 319.4.1 .................................... 1.33, 13-14

....................... 1-71, 2.7, 2-24 319.7 .............................. 321.1.1 ............................ 321.1.4 ............................ 322.3 .............................. 322.6.1 ................................... 10.10, 12-18 322.6.3 . . . . . . . . . . . . . . 1.32. 2-21, 2.29, 7-01, 12.04, 14-09 323.1.1 . . . . . . . . . . . . . . 8.19. 17-09 . . . . . . . . . . . . . . . . . . .

Curnulativc Index . €331.3 Interpretations Vols . 1-1 7



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Subject 2

. . . .

Reference

I 323.1.2 ..... 1.11. 1.15. 1.48. 2.1. 6.06. 8.07. 8.19. 11.03. 15.04. 1 7.01. 17-08

323.2 ............................................. 3-9 323.2.1 .......................................... 1-13 323.2.2 ................................... 15.12. 15-25 Fig . 323.2.2 ..................................... 14-08 Table 323.2.2 [Table 323.2.11 . . . . . . . 1.12. 1-48. 1.65. 1.76.

323.2.4 ...................................... 323.3 .......................................

Table 323.3.1 [Table 323.2.21 ............ 1.12. 1.76. 4.17.

2.19. 3.8. 4.01. 4.15. 14.12. 15.11. 15-16

323.3.2 ......................................... 11-12

5.19. 5.21. 8.29. 10.2. 11.12. 15-23 323.3.4 .......................................... 8-30 323.3.5 .............

323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.01. 10-19

Table 326.1 .................. 1.11. 1.51. 2.3. 8.07. 8-34

323.4 ........................................... 15-03

Table 323.3.5 ..................................... 5-14

328 ....................................... 7.02. 12-12 328.1 ........................................... 12-07 328.2 1327.51 ......................... 1.66. 11.09. 14-13 328.2.1 1327.5.1, 327.5.21 . . . . . . . . . . . . . . . . 1.76. 4.17. 8-29 328.2.2(g) ........................................ 14-05 328.2.3 ......................................... 15-19 328.4 ........................................... 13-01 328.4.2 and Fig . 328.4.2 .......................... 12-10 328.4.3 ......................................... 14-04 Fig . 328.4.4 ................................. 8.28. 9-08 328.5 1327.41 ..................................... 5-09 328.5.1 1327.4.11 .................................. 5-17 328.5.2 1327.4.21 ........................... 5.12. 16-06 Fig . 328.5.2 [Fig . 327.4.21 . . . . . 1.28. 5.12. 6.02. 6.05. 8.27.

15-08 328.5.4 1327.4.41 . . . . . . . . 1.59. 1.74. 2.10. 4.03. 4.14. 7.08.

8.13. 10.04. 13-11 Fig . 328.5.4 IFig . 327.4.41 ..... 1.59. 1.74. 4.03. 4.16. 7-08 328.6 ............................................ 2-18 330 ............................................. 8-21 330.1 ............................................ 8-23 Table 330.1.1 ..................................... 9-05 331 ............................................. 8-.12 331.1.1 ............................... 8.08. 9.05. 14-01 Table 331.1.1 [Table 331.3.11 ........ 1.69. 2.2. 5.06. 8.24.

9.03. 12.14. 14.16. 17-01 331.1.2 .......................................... 8-05 331.1.3 [331.3.61 . . . . . . . 1.39. 1.59. 4.06. 5.06. 9.03. 11.06.

14.01. 15.18. 17.21. 17-13 331.1.4 1331.1.2) .................................. 5-08 331.1.6 1331.3.41 ............................ 5.08. 16-09 331.1.7 1331.3.21 ............................. 1.78. 8-22 331.2.2 1331.1.11 ............................. 1.39. 1-78 331.3.4 .......................................... 8-05 331.3.7 .......................................... 8-05 332.1 ............................................ 8-03 332.2 1329.11 ...................... 1.23. 1.53. 4.02 . 8-20 332.2.2 .......................................... 16-08 332.4 1329.3, 330.21 ................................ 2-2 332.4.2 ................................... 11.03. 15-17

I

~ 0759670 0617665 15% I

subject Rdercnce

335.1.1 ................................... 15.07. 17-25 335.2 ............................................. '2-5 335.2.3 ......................................... 17-20 340.2 [336.1.21 ................................... 1-26 340.3 1336.31 ................................ 1-10. 10-03 340.4 1336.21 ............................... 1-31, 17-15 341 ...................................... 10-16, 15-13 341.2 1336.1.1. 336.1.31 . . . . . . 1.10. 1-26. 1-27, 2-28. 10-03 341.3.1 1336.51 ............................... 1.64. 2-4 341.3.2 .......................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 .................... 5-09. 13-16 Table 341.3.2 . . . . . 14-02, 14-07. 14-1 5. 16-07, 17-03. 17-22

[Table 327.4.1Al . . . . . . . . . 1-1, 1.9, 1-14. 1.41, 2-8. 5-04. 5-13, 5.16, 5-17, 5-18, 5-20, 6-04, 7-06

. . . . . 8-32, 8-38, 9-04, 11 -08. 11 -1 4. 12.22. 13-16

341.3.3 ......................................... 14-14 341.3.4 [336.5, 336.5.41 . . . . . . . . 1.62, 2-25, 2-32, 3-5, 3.14,

10-09, 10-1 2, 1 1-02, 1 1-04, 1 3-1 2, 16-01, 16-02, 16-05 341.4 [336.51 . . . . . . . . . . . . . . . 1-24, 1-45, 3-12, 5-20, 11-01 341.4.1 1336.5.11 . . . . . . . . 1.10, 1-26, 1.27, 1-60, 2.12, 2-28,

3-7, 3-12, 4-12, 5-10. 8-02, 8-10, 8-26, 10-03. 10-17, 11-11, 11-14, 11-15

341.4.2 .......................................... 8-38 341.4.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 341.5 ............................................ 8-38 341.5.1 1336.6.11 .............................. 1-5, 3-12 342 ............................................ 15-21 342.1 1336.4.11 ................................... 2-28 343 [336.4.1] ..................................... 2-28 344 [336.41 ................................ 5-09, 16-13 344.1 ........................................... 13-12 344.2 1336.4.21 . . . . . . . . . . . . 2-28. 8-10, 8y26, 11-11, 15-21 344.5 1336.4.51 ......................... 1-10, 1-60, 2-12 344.6 [336.4.61 ................................... 1-60 344.6.2 ......................................... 10-17 344.7 [336.4.71 ........................ 2-28, 3-14, 12-01 344.7.1 ......................................... 11-11

. . 1.2. 1.72. 2-31, 3-3, 8-31, 16-03, 17-30 345.1 1337.11 . . . . . . . . . . . 1-4, 1-30, 4-04, 6-08, 8-15. 12-21 345.2.2 .......................................... 8-31 345.2.3(¡) ........................................ 17-28 345.2.4 1337.4.31 .................................. 1-35 345.2.6 1337.11 ............................... 1-2, 5-22 345.3 (337.31 ...................... 2-6, 3-10, 5-02, 12-03 345.4 ............................................ 8-04 345.4.1 ......................................... 12-19 345.4.2 1337.4.11 . . . . . . . . 1.35, 1-61, 1-63, 2-23, 4-04, 9-09,

345.4.3 (337.4.21 .................................. 1-63 345.5 1337.4.41 ............ 1-35. 1-43. 6-08, 11-07, 13-06 345.5.2 ......................................... 11-19 345.5.4 ......................................... 12-02 345.7 1337.5.21 ................................... 1-36 345.8 1337.61 .......................... 1-25, 3-10, 17-02 345.9 1337.5.11 . . . . . . . 4-09. 5-07, 6-08, 8-15, 10-15. 12-01,

12-21, 15-02, 17-05. 17-10 A304 ............................................ 8-14 A304.1.1 .................................. 14-17, 14-18

13-13

Cumulative Index . 631.3 intcrprctations Vols . 1-1 7

..



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Kcicrcncc

A304.5.1 ......................................... 1-67 A304.7.2 ........................................ 13-08 A305 ........................................... 11-17 A314 ............................................ 8-33 A322.6 ......................................... 17-29 A323.4.2 .................................. 10-06, 11-18 A327.2.4 ......................................... 7-09 A328.2(a) ........................................ 10-8 A328.2.1 ................................. A328.2.5 ........................................ 17-06 A328.5 .............................. 8.14, 10-08 . 13-08 K300(a) ......................................... 17-16 K304.1.2 ............................... K31.4.2 ................................. U315 ............................................ 7-07 K322.3 ........................................... 7-07 K328.2.l(a) ...................................... 17-27

................................. 8-37 M305.1 ......................................... 12-15

................................. 8-35 M322.3 ...................................... 2-13, 3-6 M323.1.3 ......................................... 3-7 M326 ............................................ 2-13 M335.4 lM335.5, M335.61. .......................... 3-6 M341.4 lM336.51 ............................ 1.24. 1-45 M341.4.1 lM336.5.11 .......................... 2.28. 3-7 M345.1 .......................................... 6-08

Subject Rcfcrcncc

MA306.5 ......................................... 9-02 MA323.4 . . . . . . . . . . . . . ........................ 9-02 MA323.4.2 ....................................... 8-35 Appendix A Notes (No equivalent) 1(14)1 . . . . . . . . . . . . . . 2-20

Note (17) ....................................... 4-18 Note (20) [(30)1 ................................. 1-77 Note (57) I(2)I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Appendix A Table A-1 ITable 11 . . . . . . . . . 1-13. 1-18, 1-29. 1.38. 1.48.

1.77. 2.1. 3.8. 3.9. 3.13. 4.12. 4.13. 6.01. 6.Of>. 7.03. 8.11. 8.18. 8.25. 8.34. 8.36. 11.13. 12.09. 15-01

Table A-16 [Table 11 . . . . . . . . . . . . . 1.78. 2.20. 4.18. 7-03 Appendix D ......... 1.6. 1.7. 1.34. 1.46. 1.55. 1.56. 1.71.

2.7. 2.24. 4.16. 5.01. 5.15. 6.06. 12.08. 12-1 1. 12.17. 13-05

Appendix E [Appendix KI ...................... 1.44. 5-10 Appendix F [F323.2] ............................... 1-29 Appendix C ...................................... 5-12 Appendix H ................................ 8.06. 11-10

Appendix M .............................. Appendix V .............................. Appendix X. X3.1.3 ............................... 12-23

................ 13-09 Appendix X. X302.2.3 ............................. 15-22 Case 137 .......................................... 3-1 Case 141 ......................................... 1-51

Appendix J ........................ 1.28. 1-

Appendix X. X3.2.2 ...........




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Subject '

i '

Interpretation No .

Compressors internal piping ..................................... 1-8

Corrugated Bends ................................. 1-23

Cyclic Loading .............................. 5-1 2. 17-04

Design (see also Pressure Design) additional design considerations .................... 12-13 conditions ......................................... 2-3 for stainless bellows .............................. 12-23 Lame theory ...................................... 1-57 minimum temperature ............................. 10-02

Displacement Stress .................... 2.14. 2.24. 12-06

Earthquake ................................. see Seismic

Empty System transportation ..................................... 9-06

Examination acceptance criteria ................................ 16-07 extent of .............................. 1.24. 5.18. 11-01 in-process .................................. 3.14. 11-15 liquid penetrant ........... see Liquid Penetrant Examination progressive ................... see Progressive Examination radiographic ................. see Radiographic Examination random .......... 1.27. 1.45. 1.62. 2.12. 2.32. 4.12. 11-15 records ......................................... 11-11 required ....... 1.24. 1.60. 6.04. 11.14. 11.15. 15.13. 15-21 severe cyclic conditions ..................... 10-1 7. 1 1-1 4

types ........................................... 16-13 visual ............................ see Visual Examination ukrasonic ..................... see Ultrasonic Examination

Spot ............................................. 1-62

Exclusions for compressors and internal piping .................. for interconnecting piping ............................ listed in scope ....................................

Expansion Joints ....................... 1.16. 12.23.

Extruded Outlet

1 -8 1-19 10-5

3 -09

pressure design of ............................ 1.21. 1-70 tee? considered as ................................. 1-55


Fillet Weld internal. slip-on flange ............................. 8-27 pressure containing ................................ 8-1 3 size .............................................. 1-74 use .............................................. 10-4

I U 0759670 ObL7668 960 U ~


Fittings

conforming to two grades ........................... 8-18 flared. flareless. or compression types ............ 3.6. 12-16

B16.9 ........................................ 1.7. 5-01

MSS SP-75 ....................................... 1-11


Flanges assembly .......................................... 2-5

general .......................................... 9-10 long welding neck ................................. 4-05 slip-on ...................................... 5.12. 8-27 use of aluminum .................................. 1-51 use of raised and flat face metallic ................... 9-07

design ................................... 1.67. 3.4. 9-7

Flexibility Analysis branch connections ................................ 9-01 exemptions from .................................. 1-33 qualification ............................... 13.05. 13-14 thermal expansion data ............................ 15-24

Flexibility Characteristic effect of branch to run diameters .................... 1-56 for a tee ............................... 1.55. 1.56. 5-01 for components not I hed in Appendix D ........ 1.55. 2-24

Flexibility Factors basis for ......................................... 1-56 for B16-9 tee .......................... 1-7. 12.08. 12-17 for fabricated intersections ................. 1.6. 4.16. 5-15 for pressure piping components ..................... 13-05 for welded elbows .................................. 1-6

Fluid Service general hydrocarbon ............................... 6-01 requirements. metallic . . . . . . . . . . 11.16. 12.15. 12.16. 15-03 requirements. nonmetallic .................... 11.17. 71-18 responsibility for categorizing ................... 4.08. 8-09

Graphitization temperature relative to onset ........................ 1-58

Hardness limitations on ....................................... 2-2 records .......................................... 8-22 testing .......................................... 15-20

Heat Fusion Jdhts ................................. 13-08

Heat Treatment cooling rate ...................................... 1-69 for austenitic stainless steel ......................... 1-65 for bending and forming ............................. 2-2 for flared laps .................................... 11-03 for valve parts .................................... 8-12 governing thickness . . . . . . . . . . 1.39. 1.59. 4.06. 5.06. 11-06

Cumulative index . B31.3 Interpretations Vols . 1-1 7



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m 0759670 Ob1ïbb9 öT7 m

Subjcct Interpretation No .

Heat Treatment (Cont‘d) heating rate ....................................... 1-69 local ....................................... 5.08. 8-05 monitoring .................................. 5.08. 8-05 rcquircments . . . . . 8-08. 8.21. 8.23. 8.24. 9.03. 9.05. 12.14.

SP-1 through SP-5 ................................. 8-24 when radiography is required ................... 1.64. 2-4

14.01. 14.16. 15-18

Hydrostatic Tests .......................... see Leak Tests

Impact Tests absorbed energy data ............................... 2-9 alternative methods ................................ 8-30 base metal ................................. 4-01. 11-12 exclusions from ......................... 1-76. 5.14. 8-30 heat treatment required ............................. 5-1 9 in qualifying procedures ............................ 8-29 of aluminum filler metals ........................... 2-19 of austenitic stainless steel .......................... 1-65 of bolting materials ................................ 4-15 of the heat-affected zone ...................... 1-76. 5-21 of weldments ...................... 1-12. 1-65. 1-76. 5-21 requirements ..................................... 15-23 temperature limitation . . . . . . . . . . . . . . . . . . . 5-14. 8-30. 14-12

Imperfections (see also Acceptance Criteria) concave root surface ........................... 1.1. 6-04 determination of ................................... 8-32 lack of fusion ..................................... 5-09 porosity ............................ 1.9. 5.13. 5.16. 5-20 slag inclusion ..................................... 5-20 tungsten inclusions ............................ 1.9. 5-1 7 undercutting ............................. 1.14. 2.8. 6-04

installed Piping ................................... 1-30

Instrument Piping ............................ 7.07. 8-01

Internal Piping, Equipment ........................... 1-8

Joint Factors for ASTM A 234. ASTM A 312. ASTM A 403 . . . . . . . . . 2-20 for branch conncxtions ............................. 8-06 for circumferential welds . . . . . . . . . . I . . . . . . . . . . . . . . . . 1-42 for longitudinal and spiral welds . . . . . 1.78. 3-1 1. 8.06. 17-14

Joints alignment ................................. 15.07. 17-25 circumicrcntial hcnds .............................. 5-1 1 ex~ioscyI during test ............................ 2.6. 3-10 instrument tubing .................................. 7-07

tapered pipe thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1 5 threaded .................................. 1 1-1 6. 1 7-1 9

. sl>ccicìI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13

Lateral Fittings ..................................... 1-6


Leak Tests acceptance criteria ...................... 1.2. 15.22. 16-03 alternative 4.09. 5.07. 6.08. 8-1 5. 12.01. 12.21. 17.05. 17-1 O as nondestructive examination ....................... 8-31 for Category D fluid service ......................... 1-36 for system designed for O psi ........................ 2-31 isolation of test pump ............................... 1-2 leakage ........................................... 1-4 minimum hydrostatic test pressure . . . . . . . . . . . . . . 2.23. 4-04 minor repairs and additions .......................... 1-2 of discharge piping ................................ 1-72 of newly constructed systems . . . . . . . . . . 1.4. 5.02. 5.22. 8-15 of piping and vessel ............................... 1-63 of piping connecting equipment ...................... 3-3 of replacement piping ........................ 5.22. 12-21 painting before test ....................... 2.6. 3.10. 5-23 personnel qualification ............................. 8-31 pneumatic test . . . . . . . . . . . . . . . . 11 .07. 11.19. 12-02. 13-06 preparation for . .............. 2.6. 3.10. 5.02. 5.23. 12-03 reduced pressure (hydrostatic test) . . . . . . . . . 1.61. 2.23. 13-1 3 requirements ................................ 8-1 5. 13-1 3 sensitive ................................... 1.25. 17-02 temperature correction for ..................... 1.35. 1-43 test fluid ........................................ 12-19 test pressure ..................................... 12-04

Lethal Substance .................................. 1-73

Limitations on hardness ....................................... 2-2 on imperfections ....................... see imperfections on tubing size ................................ 2.13. 3-6

Liquid Penetrant Examination requirements ..................................... 11 -1 4

Low Temperature Requirements ........... see Impact Tests

Materials API 5L ................... 1.78. 2.4. 3.9. 3.11. 6.01. 6-06 API SLX ..................................... 2.4. 11-05 ASTM A 234 ..................................... 2-20 ASTM A 312 ........................... 1-29, 1.77, 2-20 ASTM A 351 .................................... 11-13 ASTM A 387 ..................................... 8-25 ASTM A 403 ................................ 1.77. 2-20 ASTM A 487 ..................................... 8-07 ASTM A 537 ................................ ASTM A 570 ................................ ASTM A 587 . . . . . . . . . . . . . ..................... 1-13 ASTM A 633 ..................................... 1-11 ASTM A 658 ...................................... 3-8 ASTM A 671 . . . . . . . . . . . . . . . . . . . . 1-48 ASTM B 241 . . . . . . . . ASTM B 337 . . . . . . . . . . . . 4-18 ASTM B 464 ..................................... 8-11

. . . . . . . .

austenitic stainless steels ............................ 3-13

Cuniul.1 tive Index . B31.3 Interpretations Vols . 1-1 7



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Materials (conrd) bases for design stresses ........................... 1 1-05 certification ............................ 5.10. 8.02. 13-10 conforming to two grades ...................... 8.18. 8-34 listed ..................................... 17.09. 17-11 notch sensitive .................................... 2-22 reidentification .................................... 8-1 9 toughness rcquircments ............................. 5-1 9 unlisted material . . . . . . . . . 1 1.05. 1 1.20. 15.04. 17-01. 1 7-08

Miter Bends pressure design of ............................ 1.22. 5-1 1

Near Straight Sawtooth Runs explanation of .................................... 1-33

Nomenclature d ............................................... 1-54 T ............................................... 1-28 t" ............................................... 1-75 T, ......................................... 5.04. 5-16

Nonmetallic Piping fluid service requirements .................... 1 1-1 7. 1 1-1 8 in Category M Fluid Service ........................ 8-35 joint requirements ............................ 7.09. 8-14 pressure design ............................. 14.17. 14-18

Notch Sensitive materials ......................................... 2-22

Occasional Variations íPressure/Temperature Allowances) . . . . . . . . 1.3. 2.14. 4-1 1

loads ............................. 1-50, 2-15, 2-16, 2-17

Owner responsihilites ........................... 1-26. 2.30. 5-22

Owner's Inspector qualifications of ................................... 1-31 responsibilities of .................................. 1-26

Pipe alterations of existing pipe ......................... 13-04 curved and mitred segments ....................... 15-14 elbowless ........................................ 8-03 in corroded condition .............................. 2-15 instrument ....................................... 17-24 made from plate ............................. 1.48. 8-36 of noncircular cross section .......................... 3-2 pressure design ............................. 13-07. 14-09 pressure testing .................................... 9-09 spiral w e l d d ..................................... 7-03 straight. under internal prtrsure . . . . . . . . . 10.20. 11.21. 14-1 1

Pipe Supports coniigurations .................................... 6-07

(hi


Pipe Supports (Cont'd) longitudinal stress effects ........................... 7-05 use of plastic ..................................... 1-49

Plastic lined pipe-use of screwed flangcu . . . . . . . . . . . . . . . . . . 8-33 pipe supports ..................................... 1-49

Pneumatic Tests ........................... see Leak Tests

Positions qualification of welding ............................ 1-66

Postweld Heat Treatment .............. see Heat Treatment

Preheat ............................. see Heat Treatment

Pressure Design allowance ....................................... 17-1 2 for elevated temperatures ............................ 3-4 in the high pressure range .................... 1.68. 17-16 of extruded headers ........................... 1-21. 1-70 of flaiiges and blanks ....................... 10.14. 13-15 of miter bends .................................... 1-21 of nonmetallic piping components . . . . . . . . . . . . 14-1 7. 14-18 of pipe . . . 1-42. 1.54. 1.57. 1.68. 1.70. 2.11. 11.21. 13.07.

of listed components ........................ 16.14. 16-18 of unlisted components . . . . . . . . . . . . . . . . 13.02. 13.03. 13-05 of valves ................................... 8.04. 13-15

15.06. 15.10. 17-06

Pressure Rating valve ............................................ 8-04 variations ......................................... 4-11

Pressure Relief Devices acceptable devices ............................ 2.21. 2-29 and test pressure .............. 1 1 .07. 11.19. 12.04. 14-09 requirements ..................................... 17-29 setting ................................ 1.32. 7.01. 12-04 stop valves ................................ 10.10. 12-18

Pressure Surges loads due to ...................................... 1-50

Pressure-Temperature Rating . . . . . . . . . . . . . . . . . . . 5.05. 8-34

Pressure Test ............................. . s e e Leak Test

Progressive Examination . . . . . . . 1.5. 1.62. 3.5. 10-09. 10-1 O. 10-1 2. 1 1.02. 1 1.04. 13-1 2'; '1 6.01. 16.02. 16-05

Published Specification ............................. 1-15

Radiographic Examination 1000/0 ............................................ 5-09 as supplementary examination ....................... 8-38 random radiography ..... 1.27. 1.45. 1.62. 2.12. 2.32. 3-12

Cumulative Index . 63l.3 Interpretations Vols . 1-1 7



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0759670 Ob17671 455 I

interpretation No .

Radiographic Examination (Cont'd) rcrords .......................................... 1-10 rtquirements . . . . . . . . . . . . . . . . . . . 6-04. 1 1.01. 1 1 .05. 12-03 selcution of welds for examination . . . . . . . . . . . . . . . . . . . 2-25 spot radiography .......................... when PWHT is required ....................

Records certi iication ............................ 5 . for radiographic examination ............... of examinations .......................... of hardness tests ......................... retention of ..............................

... 1.62. 3-12

.... 1.64. 2-4

O. 8.02. 10-03 . . . . . . . . 1-10 ....... 11-11 . . . . . . . . 8-22 ........ 1-10

Reinforcement. Branch attachment weld .............................. 4.03. 7-08 clarification of terms ......................... 1.37. 11-10 limits of ..................................... 2.27. 9-04

Repairs to welds ......................................... 2-18

Responsibility designer ......................................... 10-11 rights of owner's inspwtion .................. 10.03. 17-1 5

Safeguarding ...................................... 5-1 2

Scope ............................... see Code Coverage

Seismic loads ..................................... 4-07 stresses due to .................................... 2-17

Severe Cyclic Conditions cyclic loading ..................................... 5-12 large rapid temperature change ...................... 8-09 spiral welded pipe ................................. 7-03


Standard Components manufacturers markings ......................... 3.7. 8-02 valves ................................. 5.05. 8.04. 8-07

Standards compliance ....................................... 5-10 superseded ....................................... 1-44

Stresses (see also Allowable Stresses) displacement stress range ..................... 7.04. 12-06 due to cold spring ................................. 8-16 due to occasional loads ............................ 2-16 due to pressure surges ............................. 1-50 due to seismic loads ............................... 2-17 due to sustained loads . . . . . . . . . . . . . . . . 15.15. 16.04. 16-11

iongitudinai . . . . . . . . . . . . . i .20. 1.50. 2.15. 2.24. 4.10. 4.12. due to thermal gradients ............................. 3-4

6-O.IR (Vol . 7). 6.07. 7.05. 8.16. 17-18

interpretation No . Subject

Stresses (Cont'd) rcduction factors ................................. 16-1 0

Stress intensification Factors application of . . . . . . . . . . . . . . . . . . 1.34. 2.24. 6-03R (Vol. 7) basis for ......................................... 1-56 branch connections ................................. 2-7 for 816.9 tees ..................................... 1-7 for fabricated intersections ...................... 1-6, 5-1 5 for tcm . . . . . . . . . . . . . . 1-46, 1-55, 1-71, 5-01, 12-08, 12-17 for unlisted components ........................... 13-05 for welded elbows ............................ 1-6. 12-11

Temperature allowance ....................................... 17-1 2 bending .......................................... 16-08 design minimum temperature .... 10.02. 14.08. 14.12. 15.11.

large changes ..................................... 8-09 limitations ...................... .4.13. 5.14. 15.12. 15-25 reduction ......................................... 4-11 verification ...................................... 16-09

15.16. 17-07

variation in elevated temperature service . . . . . . . . . . . . . 17-1 7

Thermoplastic Piping neat fusion joints ................................. 13-08 solvent cemented joints ............................ 10-8 5pecific requirements .............................. 10-06

Tubing category M fluid service ........................... 16-1 7 joints ............................................ 7-07 limitations .................................... 2-1 3, 3-6

Thickness Allowances governing ................................. 17.13. 17-21 in stress calculations ............................... 1-20

Ultrasonic Examination in place of radiography ........................... 11 -05 rcquircments ..................................... 10-1 7

Unlisted Components . . 1.6. 1.51. 3.6. 4.05. 5.05. 8.7. 10.18. 10.11,

materials .................................. see Materials 10.07. 12.09. 13.02. 13.03. 13-05

Valves Category M Fluid Service ........................... 8-35 Flanged Ball Valves ............................... 16-16 materials ................................... 8.07, 15-26 pressure build up .................................. 8-04 ratings ........................................... 5-05

Visual Examination internal ............................... 8.10. 8.26. 13-16 requirements .......................... 2.28. 10.03. 13-16

Cumulative index . B3 1.3 Interpretations Vols . 1-1 7 (i)



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r - . . .


Washers. Use of .................................... 2.5 1

Weld acceptance criteria .......................... 17-03. 17-22

definition ........................................ 14-03 examination of welds . . . . 10-15. 11-01. 11.14. 13.16. 14.14.

fillet size ............................. 1.74. 10.19. 16-06 for branch connections ....... 2.10. 4.03. 4.14. 8.37. 11-10 imperfcctions ..................... see Acceptance Criteria longitudinal ............................. 2.20. 3-1 1. 4-1 8 of valves ........................................ 12-12 preparation for welding ...................... 13.01. 14-04 qualification of position ............................ 1-66

bevels .......................................... 12-10

14.15. 15-02

Suhjcct Interpretation No .

Weld (Cont’d) reinforcement ............................... 7.08. 11 -08 repair ............................................ 2-18 socket . . . . . . . . . . . . . . . . . . . 6-02, 6-05, 10-19, 15-08, 16-06 spacing of ........................................ 7-02

Welder Qualification hy others ........................................ 15-19 requirements ..................................... 17-27

Welding Procedure qualification of ..... 1-1 2. 1.65. 1.66. 1.76. 4-1 7. 8.23. 8.29.

responsibility ............................... 12.07. 12-12 specification ................................. 8.21. 8-22

11.09. 14.05. 14-13

Cumulative Index . 831.3 lirterpretations Vols . 1-1 7



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~

STD-ASME B31-3 I N T N O - Lb-ENGL D 0757b70 O b O b 8 2 b ‘4BB 9

ASME B31.3


Replies to Technical Inquiries April 1, 1997, Through March 31, 1998

General Information




For detailed instructions on preparation of technical inquiries to the i33 I Committee, refer to Appendix Z.



i 85



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STD.ASME B31-3 I N T N O - Lb-ENGL W ü759b70 Obüb827 314 M

B31.3

Subject . Para . 300(c)(3). Intent of the Code ............................................ Para . 302.2.1, Prssure-Temperature Design Criteria - Listed Components

Having Established Ratings ............................................... Para . 302.3.2, Limits of Calculated Stresses Due to Sustained Loads

and Displacement Strains ................................................. Para . 302.3.5, Limits of Calculated Stresses Due to Sustained Loads and

Displacement Strains ..................................................... Para . 304.1.1, Pressure Design of Components .................................. Para . 328.5.2. Welding Requirements - Fillet and Socket Welds .................. Para . 33 I . 1.6, Temperature Verification ........................................ Para . 332.2.2(a), Bending Temperature .................................... Para . 341.3.4, Progressive Examination ........................................ Para . 341.3.4, Progressive Examination ........................................ Para . 341.3.4, Progressive Examination ........................................ Para . 344, Types of Examination ..................................... Para . 345, Leak Testing .................................................... Table 302.3.5, Stress-Range Reduction Factors .................................. Table 323.2.2, Minimum Temperatures Without Impact Testing for Carbon

Steel Materials .......................................................... Table 341.3.2A, Examination Acceptance Criteria ............................... Flanged Ball Valves .......................................................

Tubing in Category M Fluid Service .......................................... Tapered Pipe Thread Joints . . . . . . . . . .

interpretation

16-12 16-18

16-04

16-1 1

16-14 16-06 16-09 16-08 16-0 1

16-05

16-03 16-10 14-12R

16-02

16-13

16-07 16-16 16-15 16-17

File No .

B3 1-97-0268 831 -97-038

B3 1 -96-057

B3 1-97-024

B3 1-97-029 63 1-96-0588 B 3 3 1-97-01 B31-97-001 B3 1-96-053 B3 1-96-054 B31 -96-0S8A B3 1-97-028 8 3 1-96-055 83 1-97-014 B3 1-95-018

B3 1-96-060 B3 1-97-036 B3 1-97-032 B3 1-97-037

I87



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~

STDmASME B3L.3 I N T N O - Lb-ENGL 0757b70 ObOb828 250

831.3 Interpretations No. 16 14-12R, 16-01, 16-02

Interpretation: 14-12R

Subject: ASME B3 I .3-1993 Edition, Table 323.2.2, Minimum Temperatures Without Impact Testing for Carbon Steel Materials


File: 631-95-018

Question: Does ASME 831.3-1993 Edition require impact testing of ASTM A 403 WP304W. B16.9 fittings manufactured from A 312 welded TP304 pipe without the use of weld metal deposits and used at design temperatures of -425°F or above.

Reply: No. See Table 323.2.2, Column A.


Subject: ASME B3 1.3- 1996 Edition, Para. 34 I .3.4, Progressive Examination

Date Issued: May 20, 1997 File: B3 1-96-053

Question: In accordance with ASME B3 1.3-1996 Edition, para. 341.3.4, Progressive Examination, if a defective weld is repaired, found defective again, repaired a second time and again found to be defective, is it necessary to examine two additional items for each failed repair?

Reply: No. See para. 341.3.3.


Subject: ASME B3 I .3-1993 Edition, Para. 341.3.4, Progressive Examination


File: B3 1-96-054

Question ( I ) : In accordance with ASME B31.3-1993 Edition, Table 341.3.2A and para. 341.3.4, when the engineering design specifies more stringent acceptance criteria for normal fluid service, do the requirements of para. 34 I .3.4, Progressive Examination, still apply?

Reply ( i ) : Yes.

Question (2): In accordance with ASME B3 I .3- 1993 Edition, for normal fluid service, when a particular one hundred welds constitute a designated lot, welder “ A completes three welds and two are radiographed to acceptance, and welder “B” completes ninety-seven welds and five are radiographed to acceptance, do all welds in the lot, after visual and leak tests, meet the requirements of the Code?

Reply (2): Yes. provided no other welds in the designated lot were examined showing unacceptabel defects.

189



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16-03,16-04 831.3 Interpretations No. 16


Subject: ASME B3 1.3- 1996 Edition, Para. 345, Leak Testing


File: B3 1-96-055

Question (1): In accordance with ASME B31.3-1996 Edition, para. 345.1(b), with a system design pressure of 150 psig at 200"F, and where a hydrostatic pressure test is impractical, does a pneumatic test at 150 psig or 110% of design pressure, whichever is less, satisfy the requirements of the Code?


Question (2): In accordance with ASME B3 1.3-1996 Edition, under the above conditions, would testing

Reply (2): No. Use of the alternative leak test is permitted only if the conditions of para. 345.1 (c) are met.

in accordance with para. 345.9 be required?


Subject: ASME B3 I .3a- 1996 Addenda, Para. 302.3.2, Limits of Calculated Stresses Due to Sustained Loads


File: B3 1-96-057

and Displacement Strains

Question ( I ) : In accordance with ASME B3 1.3a-1996 Addenda, para. 302.3.5, shall the longitudinal sustained stresses, S,, be evaluated in the installed and all operating positions of the pipe relative to its supports and restraints?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3a-i996 Addenda, para. 302.3.5, is there an allowable operating stress for the combination of longitudinal sustained stresses and displacement stresses, not displacement stress ranges?


I90



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~ ~-

S T D - A S M E B3L.3 I N T N O . Lb-ENGL m 0759b7ü ü b ü b ô l ü 909

B31.3 Interpretations No. 16


Subject: ASME B3 1.3-1996 Edition, Para. 341.3.4, Progressive Examination


File: B3 1-96-05814

16-05, 16-06. 16-07

Question ( I ) : A welder’s production welds experience some rejections. The welder is retained and requalified. In accordance with ASME B3 1.3- 1996 Edition, para. 341.3.4, Progressive Examination, does the Code require more stringent examination of this welders welds?

Reply (1): No.

Question (2): In accordance with ASME B3 I .3-1996 Edition, para. 341.3.4, can the two additional joints examined after a defective joint is found to be counted as part of the 5% random radiography requirement?

Reply (2): No.


Subject: ASME B3 1.3-1996 Edition, Para. 328.5.2, Welding Requirements - Fillet and Socket Welds


File: B3 1-96-058B

Question: In accordance with ASME B31.3-1996 Edition, para. 328.5.2 and Fig. 328.5.2c, what is the

Reply: The Vl6 in. approximate gap shown in Fig. 328.5.2~ is “before welding.” The Code does not

minimum gap acceptable in a socket-welded joint after welding?

provide a gap dimension after welding.


Subject: ASME B3 1.3- 1993 Edition, Table 341.3.2A, Examination Acceptance Criteria


File: B3 1-96-060

Question: In accordance with ASME B3 1.3- 1993 Edition, Table 34 I .3.2A, in the radiographic examination

Reply: The Code does not address the use of a densitometer for this purpose.

of girth and miter groove welds, can a densitometer be used to evaluate root concavity?

191



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~~

STDmASME B 3 1 . 3 I N T NO. Lb-ENGL m 0757b70 ObOb83L 8LI5 m

16-08,16-09,16-10


Subject: ASME B3 I .3- I996 Edition, Para. 332.2.2(a), Bending Temperature


File: B3 1-97-001

831.3 Interpretations No. 16

Question: In accordance with ASME B3 1.3-1996 Edition, paras. 332.2.2(a) and (b), are the transformation ranges used in B31.3 considered to be the lower critical temperatures in ASME B31.1-1995 Edition, para. 129.3. I ?

Reply: No.


Subject: ASME B3 1.3a- 1996 Addenda, Para. 33 I . 1.6, Temperature Verification


File: B3 1-97-0 13

Question: In accordance with ASME B3 1.3a-1996 Addenda, para. 33 1.1.6, can a thermocouple be laid on a part being heat treated as opposed to being attached?

Reply: The Code requires only that temperature be checked by thermocouple, pyrometers, or other suitable methods to ensure that WPS requirements are met. It does not otherwise address positioning or attachment of thermocouples, except for a permissive statement in para. 330.1.3(b) allowing attachment by capacitor discharge method without procedure and performance qualifications.


Subject: ASME B3 I .3a- I996 Addenda, Table 302.3.5, Stress-Range Reduction Factors


File: B31-97-014

Question ( i ) : In accordance with ASME B3 I .3a- 1996 Addenda, does the stress range reduction factor,

Reply (I): No, except see para. 319.3.4(b).

f, as listed in Table 302.3.5 and provided in equation ( I c) depend on the material of construction?

Question (2): In accordance with ASME B3 I .3a- 1996 Addenda, Appendix D, do the stress intensification

Reply (2): No.

factors, ii and i,, depend on the material of construction?

192



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STD-ASME 831.3 I N T N O . Lb-ENGL M 0 7 5 7 b 7 0 OhOb832 781



Subject: ASME B31.3a-1996 Addenda, Para. 302.3.5, Limits of Calculated Stresses Due to Sustained Loads and Displacement Strains


File: B3 1-97-024

Question (1): In accordance with ASME B3 1.3a- 1996 Addenda, para. 302.3.5, is the stress range reduction factor independent of the material of construction?

Reply (i): Yes; however, see para. 319.3.4(b).

Question (2): In accordance with ASME B3 1.3a- 1996 Addenda, are the stress intensification factors listed in Appendix D independent of the material of construction?

Reply: Yes; however, see para. 319.3.4(b).


Subject: ASME B3 1.3a-1996 Addenda, Para. 300(c)(3), Intent of the Code


File: B3 1 -97-026B

Question (1): May a piping designer use para. 300(c)(3) of ASME B31.3a-1996 Addenda and apply a more rigorous analysis to qualify the design and acceptance criteria of piping where the Code requirements employ a simplified approach?

Reply ( i ) : Yes, if the designer can demonstrate the validity of the approach to the owner.

Question (2): In accordance with ASME 8 3 1.3-1996 Edition, does a piping system that has been designed in accordance with the Code but not fabricated or assembled as specified by the engineering design, comply with the Code if a more rigorous analysis proves it suitable for the service intended?

Reply (2): No. See para. 300.2, Definitions - Assembly and Erection. Also, see para. 341.3.2.


Subject: ASME B3 1.3a-1996 Addenda, Para. 344, Types of Examination


File: B3 1-97-028

Question: In accordance with ASME B31.3a-1996 Addenda, para. 344, does the Code contain instruction or restrictions regarding the design of a designated lot of piping?

Reply: No, other chan the definition in Note 2 of para. 344.1.3.

193



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S T D - A S M E 831.3 INT N O . Lb-ENGL D 0759b70 ObOb833 bL8



Subject: ASME B3 1.3a- i 996 Addenda, Para. 304. i . 1, Pressure Design of Components

Date Issued: November IO, 1997

File: B3 1-97-029

Question: For subsea production systems where ASME B31.3 is required, can the internal design gage pressure, P, in paras. 304. I . I and 304. I .2 be interpreted as coincident internal design gage pressure minus external gage pressure?

Reply: Yes; however, when the coincident external gage pressure is greater than the internal gage pressure, the design shall be in accordance with para. 304.1.3.


Subject: ASME B3 I .3a- 1996 Addenda, Tapered Thread Joints


File: B3 1-97-032

Question: In accordance with ASME B31.3a-1996 Addenda, does the Code permit the use of tapered

Reply: Yes, provided the joints comply with the provisions of paras. 314 and 335.3.

pipe thread joints?


Subject: ASME B3 I .3- 1996 Edition, Flanged Ball Valves


File: B3 1-97-036

Question: According to ASME 831.3-1996 Edition, are flanged ball valves where the ball is held in place by a threaded retainer plug in which the end of the plug forms some or all of the flange face prohibited from use in Category M Fluid Service?

Reply: No.

I94



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STDSASME B 3 1 - 3 INT NO. Lb-ENGL = 0759670 ObOb834 554 H



Subject: ASME B31.3-1996 Edition, Tubing in Category M Fluid Service


File: 83 i -97-037

16-17, 16-18

Question: In accordance with ASME B3 I .3- 1996 Edition, is tubing with flared, flareless, and compression tubing joints prohibited for Category M fluid service in sizes larger than 16 mm (y8 in.) O. D. for piping other than instrumentation signal lines in contact with process fluids and process temperature-pressure conditions?

Reply: No. Also, see Interpretation 2-13.


Subject: ASME B3 I .3a- 1996 Addenda, Para. 302.2.1, Pressure-Temperature Design Criteria - Listed


File: B3 1-97-038

Components Having Established Ratings

Question: When selecting a flange on the basis of pressure-temperature rating given in ASME B 16.5, in accordance with ASME B31.3a-1996 Addenda, para. 302.2.1, is it required to consider any external forces and moments acting on the flange?

Reply: Yes. See para. 303.

I95



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S TD-ASME B i l l - 3 INT NO. Lb-ENGL 0759b70 OhOb835 q90

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 631.3-1990 or later Editions. References in brackets

are to previous Editions and Addenda.)

Interpretation Code Reference - No.

Introduction. . . . . . . . . . . . . . . . . . . . . . . 1-3, 1-6, 1-7, 13-04 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 O, 8-1 7 300(b) 1-26, 1-32, 4-08, 5-03, -11, 13-14 300(~) . 3-2, 3-4, 4-10, 6-03R (Vol. 7), 7-05, 8-30, 13-02, 16-12

. . . . . . . . . .

300(c) [300(e)l . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3, 1-6, 1-7 300.1 . . . . . . . . . . . . . . . . . . . . . . . . 7-1 O, 8-1 7, 9-06, 12-20 300.1.1 . . . . . . . . 1-47, 1-52, 2-26, 3-1, 4-1 9, 6-01, 8-01, 9-02 Fig. 300.1.1 . . . . . . . . . . . . . . . . . 1-8, 1-19, 2-26, 7-10, 8-17 300.1.3 [300.1.4] . . . . . . . . . 1-8, 1-1 6, 1-1 9, 1-26, 3-2, 1 5-09 300.1.3(d) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-05 300.2

Category 0 Fluid Service . . . . . . . . . . . . . . 4-1 3, 5-03, 6-01 . . . . 1-40, 1-73, 6-01, 8-09, 9-02

notch-sensitive . . . . . . . . . . . . . . . . . . . . .2-22 . . . . . . . . . . . . . . . . . . . . . 2-30

piping components . . . . . . . . . . . . . . . . . . 3-2, 8-01, 14-03 piping system . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30, 9-06 severe cyclic conditions . . . . . . . . . . . . . . . . . . . 5-12, 8-09

301.2. . . . . . . . . . . . . . . . . . . . . 2-3, 7-01 . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29,13-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

301.3.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-02 301.3.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11 301.5.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-O7

. . . .

301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

301.7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 302 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 302.2 . . . . . . . . . . . . . . . . . . . . . . 302.2.1. . . . . . . . . . . . . . . . . . . . . 302.2.4 [302.2.3] . . . . . . . . . . . . . . . . . . 1-3, 1-32, 2-14, 3-4,

4-1 1, 7-01, 7-04, 8-04, 14-09 302.2.5 . . . . . . . . . . . 13-15 302.3.2 . . . . . . . . . 1-18, 1-38, 2-16, 3-13, 8-25, 11-05, 16-04 302.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,2-20 Table 302.3.4. . . . . . . . . . . . . . . . . . . . 1-42, 1-78, 2-20, 3-11 302.3.5

Table 302.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-10 302.3.6 . . . . . . . . . . . . . . . . . . . 1-50, 2-1 5, 2-1 6 , 2-1 7

. . . . . . . . . . . . . . . . .6-O5

. . . 1-20, 1-50, 2-14, 2-15, 2-24, 3-4, 4-10, 4-12, -03R (Vol. 7), 6-07, 7-04, 7-05, 8-1 6, 15-1 5, 16-11

Fig. 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Interpretation Code Reference - No.

304.3 . . . . . . . . . . . . . . . . . . . . . . . . . 1-21, 1-46, 5-01, 6-09 304.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-O5 304.3.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-03, 7-02, 8-06,

8-37, 11-10, 12-05, 14-10, 15-05 Fig. 304.3.3 . . . . . . . . . . . . . . . . . . . . . . . .8-37 304.3.4 . . . . . . . . . . . . . . . . . . . 1-21, 1-37, 1-55, 1-75, 2-27

. . . . . . . . . . . . . . . . . . . . . . . . . 1-70

. . . . . . . . . . . . . . . . . . . . . . . . 12-13 . . . . . . . . . . . . . . . . 3-4, 9-07, 10-14 304.5 . . . . . . . . .

304.5.1 (b) . . . . . . . . . 304.7.2 . . . . . . . . . . . 1-51, 3-2, 4-05, 5-05, 5-11, 6-09, 10-07,

10-1 1, 10-1 8, 12-09, 13-02, 13-03, 13-05, 13-11 304.7.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 305.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8,3-9 305.2.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 305.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . 6-01, 7-03 306.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16 306.4.2. . . . . . . . . . . . . . . . . . . . . . . .

300.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . 311.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

312 . . . . . . . . . . . . . . . . . . . . . . . . 314.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22 Table 314.2.1 . . . . . 315.2.. . . . . . . . . . . . . . .

31 7.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . l - 1 7

Table 319.3.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . 319.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 319.2.3 . . . . . . . . . . . . . . . . . . . . . . 7-04, 7-05, 12-06

. . . . . . . . . . . . . . . . . . . . . . . . . . 15-24

. . . . . . . . . . . . . . . . . . . . . . . 319.3.6 . . . . . . . . . . . . . . . . 1-6, 1-7, 1-55, 2-24, 5

. . . . . . . . . . . . . . . . . . . . . . 1-33, 13-14 319.4.4.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71, 2-7, 2-24 319.7.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16, 7-05 321.1 . I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-O7 321.1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-49 322.6.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10, 12-18 322.6.3 . . . . . . . . . . . . . 1-32, 2-21, 2-29, 7-01, 12-04, 14-09 323.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19 323.1.2 . . . . . . . . . . . . . . . . . . . . . . . . 1-11, 1-15, 1-48, 2-1,

6-06, 8-07, 8-1 9, 11 -03, 15-04

Cumulative Index - B31.3 Interpretations Vols. 1-1 6 (a)



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S T D . A S M E B3L.3 I N T NO . Lb-ENGL

Code Reference Interpretation - No .

323.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 323.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 323.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.12, 15-25 Fig . 323.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-06 Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . 1.12, 1.48, 1.65, 1.76, 2.19, 3.8, 4.01, 4.15, 14.12, 15.11, 15-16

323.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.06 323.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.76, 5-1 3 323.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 2 Table 323.3.1

[Table 323.2.21 . . . . . . . . 1.12, 1.76, 4.17, 5.19, 5.21, 8.29, 10.2, 11.12, 15-23

323.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.30 323.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 323.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-03 323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.01, 10-19 Table 323.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 Table 326.1 . . . . . . . . . . . . . . . . . . 1.11, 1.51, 2.3, 8.07, 8-34 328 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.02, 12-12 328.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-07 328.2 I327.51 . . . . . . . . . . . . . . . . . . . . . . 1.66, 11.09, 14-13 328.2.1 1327.5.1, 327.5.21 . . . . . . . . . . . . . . 1.76, 4.17, 8-29

. . . . . . . . . . . . . . . . . . . 14-05

. . . . . . . . . . . . . . . . . . . 15-19 328.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-01 328.4.2 and Fig . 328.4.2 . . . . . . . . . . . . . . . . . . . . . . . 12-10 328.4.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-04 Fig . 328.4.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.28, 9-08 328.5 1327.41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.09 328.5.1 1327.4.11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.17 328.5.2 I327.4.21 . . . . . . . . . . . . . . . . . . . . . . . . 5.12, 16-06 Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . . . . 1.28, 5.12, 6.02, 6.05,

8.27, 15-08 . . . . . . . . . . . . . . . . 1.59, 1.74, 2.10, 4.03,

4.14, 7.08, 8.13, 10.04, 13-11 . . . . . . . . . . 1.59, 1.74, 4.03, 4.16,

7-08 328.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

328.5.4 1327.4.41

Fig . 328.5.4 [Fig . 327.4.41

330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21

Table 330.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.05 330.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23

331 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12 331.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.08, 9.05, 14-01 Table 331.1 . 1

(Table 331.3.1 1 . . . . . . . . 1.69, 2.2, 5.06, 8.24, 9.03, 12-1 4, 14-1 6

331.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.05 331.1.3 1331.3.61 . . . . . . . . . 1.39, 1.59, 4.06, 5.06, 9.03,

11.06, 14.01, 15-18 331.1.4 (331.1.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-08 331.1.6 I331.3.41 . . . . . . . . . . . . . . . . . . . . . . . . 5.08, 16-09 331.1.7 [331.3.21 . . . . . . . . . . . . . . . . . . . . . . . . . 1.78, 8-22 331.2.2 [331.1.1] . . . . . . . . . . . . . . . . . . . . . 1.39, 1-78 331.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 331.3.7 . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 332.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-03 332.2 1329.11 . . . . . . . . . . . . . . . . . . . 1.23, 1.53, 4.02, 8-20 332.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-06 332.4 1329.3, 330.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 332.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.03, 15-17

335.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 335.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-07

340.2 1336.1.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

Code Reference Interpretation

No. 340.3 I336.31 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10, 10-03 340.4 I336.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31 341 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1 6.1 5.13 341.2 I336.1.1, 336.1.31. . . . . . . 1.10. 1.26. 1.27. 2.28. 10-03 341.3.1 I336.51 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.64, 2 4 341.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32 Fig . 341.3.2 [Fig . 327.4.11 . . . . . . . . . . . . . . . . . . . 5.09, 13-16 Table 341.3.2 . . . . . . . . . . . . . . . . 14.02, 14.07. 14.15, 16-07

[Table 327.4.1Al. . . . . . . . . . 1.1. 1.9. 1.14. 1.41. 2-8. 5-04.

[Table 341.3.2Al. . . . . 8.32, 8.38. 9.04. 11.08, 11.14, 12.22. 5.13. 5.16. 5.17. 5.18. 5.20. 6.04, 7-06,

13-1 6 341.3.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-14 341.3.4 I336.5, 336.5.41 . . . . . . . . 1.62, 2.25. 2.32. 3.5, 3.14.

10.09, 10-1 2, 11 .02. 11 -04. 13-1 2. 16-01. 16.02. 16-05 . . . . . . . . . . . . . . 1.24, 1.45, 3-1 2, 5.20, 11 -01 341.4 [336.5]

341.4.1 1336.5.11 . . . . . . . . . . . . 1.10, 1.26, 1.27, 1.60, 2.12, 2.28. 3.7. 3-1 2. 4-1 2. 5.10.

8.02, 8-1 O, 8.26, 10.03. 10-1 7. 11.11, 11.14, 11-15

341.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.38 341.4.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10 341.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38 341.5.1 1336.6.11 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5. 3-12 342 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-21 342.1 [336.4.1 ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.28 343 [336.4.1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.28 344 I336.41 . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.09.1 6.13 344.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-12 344.2 1336.4.23 . . . . . . . . . . . . 2.28. 8.10. 8.26, 11.11, 15-21 344.5 I336.4.51 ...................... 1.10. 1.60. 2-12 344.6 [336.4.6] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60 344.6.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17 344.7 I336.4.71 . . . . . . . . . . . . . . . . . . . . . 2.28. 3.14, 12-01 344.7.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-11 345 [3371 . . . . . . . . . . . . . . 1.2. 1.72. 2.31, 3.3. 8.31. 16-03 345.1 I337.11 . . . . . . . . . . . 14, 1.30. 4.04. 6.08, 8.15. 12-21 345.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.31 345.2.4 1337.4.31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 345.2.6 1337.11 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2, 5-22 345.3 [337.31 . . . . . . . . . . . . . . . . . . . 2.6. 3.10. 5-02. 12-03 345.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.04 345.4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-19 345.4.2 I337.4.11 . . . . . . . . 1.35. 1.61. 1.63. 2.23. 4-04. 9.09.

13-1 3 345.4.3 1337.4.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 345.5 [337.4.4] . . . . . . . . . . . . 1.35. 1-43. 6.08, 11.07, 13-06 345.5.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 9 345.5.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2-02 345.7 [337.5.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36 345.8 [337.6] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25. 3-10 345.9 1337.5.11 . . . . . . . 4.09. 5.07. 6.08. 8.15. 10.15. 12-01.

12.21. 15-02 A304 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 A304.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1 7, 14-18 A304.5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-67 A304.7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3-08 A305 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-17 A314 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-33 A323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.06, 11-18 A327.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-09 A328.2(a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8 A328.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 A328.5 ......................... .8.14.10.08. 13-08




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Interpretation Code Reference - No . K304.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.21. 14-11 K315 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 K322.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 Fig . K328.5.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.37 M305.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1 5 M307.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35 M322.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.13, 3.6

. . . . . . . . . . . . . . . 3.7

. . . . . . . . . . . . . . 2.13 M335.4 IM335.5, M335.61 . . . . . . . . . . . . . . . . . . . . . . . . 3-6 M341.4 1M336.51 . . . . . . . . . . . . . . . . . . . . . . . . . 1.24, 1-45 M341.4.1 IM336.5.11 . . . . . . . . . . . . . . . . . . . . . . . 2.28, 3-7 M345.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 MA306.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.02 MA323.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-02 MA323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.35 Appendix A Notes

(No equivalent) [(i411 . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Note (i 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.18 Note (20) [(30)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-77 Note (57) [(2)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Code Reference interpretation - No .

Appendix A Table A-1 [Table i ] . . . . . . . . . 1-1 3. 1.18. 1.29. 1.38. 1.48.

1.77. 2.1. 3.8. 3.9. 3.13. 4.12. 4.13. 6.01. 6.06. 7.03. 8.11.

8-1 8. 8.25. 8.34. 8.36. 11 -1 3. 12.09. 15-01

Table A-1 B [Table i ] . . . . . . . . . . . . . 1.78. 2.20. 4.18. 7-03 Appendix D . . . . . . . . . . . . . . . . . . 1.6. 1.7. 1.34. 1.46. 1.55.

Appendix E [Appendix KI . ................... 1.44. 5-10 Appendix F lF323.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 Appendix G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12 Appendix H . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-06.1 1.10 Appendix J ..................... 1.28. 1.54. 1.75. 5-04 Appendix M . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.01. 8-09 Appendix X. X3.1.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-23 Appendix X. X3.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-09 Appendix X. X302.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . 15-22 Case137 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Case141 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51

1.56. 1.71. 2.7. 2.24. 4-1 6. 5.01. 5-1 5. 6-06. 12.08. 12-1 1. 12-1 7. 13-05

Cumulative Index . B31.3 Interpretations Vols . 1-1 6 Copyright ASME International Provided by IHS under license with ASME Licensee=Bogazici University/5964815002, User=ahmadi, rozita


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S T D - A S M E B 3 1 . 3 INT NO. L b - E N G L 0759b70 O h O b 8 3 8 LTT

Subiect

SUBJECT INDEX

Interpretation - No. Subiect

Acceptance Criteria pressure tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 weld.. . . . . . . . . . . . . . . 1-1, 1-9, 1-14, 1-41, 2-8, 5-09, 5-13,

5-17, 5-18, 5-20, 6-04, 7-06, 8-32, 12-22, 13-16, 14-02, 14-07

Allowable loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-06

Allowable Stresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12 bases for . . . . . . . . . . . . . 1-18, 3-13, 8-11, 8-25, 10-13, 15-01 for ASTM A 31 2. . . . . . . . . . . . . . . . . . . . . . . . . . , , . . . 1-29 for ASTM A 351 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 3 for ASTM A 387. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-25 for ASTM A 570. . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 for ASTM A 587. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 3 for ASTM A 671. . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-48 for ASTM B 464. . . . . . . . . . . . . . . . . . . . , . . . . . . . . . .8-11 for austenitic stainless steels . . . . . . . . . . . . . . . . . . . . . . 3-13

Alterations of Piping . . . . . . . . . . . . . . . . . . . .

Alternative Tests. . . . . . . . . . . , , . . . . . . . . . . . . . . . . . 13-04

see Leak Tests

Authorized Inspector. . . . . . . . . . . . . . . see Owner’s Inspector

Bello w s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-09

Bending. . . . . , . . . . . . . . . . . . . . . . 4-02, 8-03, 15-1 7, 16-08

Bends corrugated. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 miter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Miter Bends reduction of outside diameter . . . . . . . . . . . . . . . . . . . . . 8-20

Bonding Qualification Test hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-14 minimum burst pressure. . . . . . . . . . . . . . , . . . . . . 7-09, 8-14 procedure specifications for plastic piping. . . . . . . . . . . . 10-08 solvent cement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , 8-1 4

Bonds heat fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-14 hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,8-14 test assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , , , 7-09

Bolting Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15

Branch Connections extruded outlets . . . . . . . . . . . . . . . . . . . . . . 1-37, 2-27, 6-09

Interpretation - No.

flexibility analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-01 integrally reinforced fitting. . . . . . . . . . . . . . . . . . , 4-05, 11 -1 O projection into run pipe. . . . . . . . . . . . . . . . . . . . , 8-28, 9-03 reinforcement. . . . . . . . 8-06, 8-37, 12-05, 12-1 3, 14-10, 15-05 weld requirements . . 2-10, 4-03, 4-14, 7-02, 7-08, 10-04, 13-11

Brazed joints for flammable service. . . . . . . . . . . . . . . . . . . . . . . . . . , 1-1 7

B u c ~ ~ ~ s . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . 1-23, 1-53

cast Irons specific requirements . . . . . . . . . , . . . . . . . . . . . . . . . . 10-01

Category 0 Fluid Service alternative pressure test for . . . . . . . . . . . . . . . . , , . . . . . 1-36 limitations . . . . . , . . . . . . . . . . . . . . . . , . . . . . . .4-13, 5-03 radiographic examination . . . . . . . . . . . . . . . . . . . . . . . . 8-38

Category M Fluid Service clarification of term . . . . . . . . . . . . . . . . . . , . . . . . double contained piping. . . . . . . . . . . . . . . . . . . . .

1-73, 9-02 . . . . 8-35

leak test., , . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . .6-O8 liquid oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-O9 requirements. . . . . . . . . . . . . . . . . . tubing size limitations. . . . . . . . . . . . . . . , , . . . . . . . . . . 2-13 ”very small quantiîy” . . . . . . . . . . . . . . . . 1-40

. . . . 8-35, 9-02, 12-15

Code Coverage B31.3 versus 831.4 . . . . . . . . . . . . . . . . . . . . 1-47, 7-10

. . . . . . . . . . . . . . . . n service . . . . . . . . . . . , , . . . . . . . . .6-O1

in-line sensing devices . . . . . . . . . . . . . . . . . . . . . . . . . . 8-01 intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , , , . . . . 16-1 2 new and replacement piping . . . . . . . . . 5-22, 12-21

oil heating system . . . . . . . . . . . . . . . . . . . . . . , . . . . . .4-19 radioactive fluids . . . . . . . . , . . . . . . . . . . . . . synfuel plant piping. . . . . . . . . . . . . . . . . . . . . tobacco plant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Components (see also Fitting, Flanges, Standard components,

offshore platform . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

Unlisted and Valves) certification . . . . . . . . . . . . . . . design conditions. . . . .

. . 1-26 3-7, 5-10, 13-10 . . . , . . .2-3

fabricated or flared laps in-line sensing devices . . . . . . . . . . . . . . . . . . , . , . . . . . 8-01 referenced standards . . . . . . . . . . . . . . 1-44, 5-1 O

Cumulative index - 831.3 Interpretations Vols. 1-1 6 (e)



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S T D . A S M E B3L.3 I N T NO . L b - E N G L 0759b70 Obüb839 03b m

Interpretat ion - No .

COmpSSOrS

internal piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Corrugated Bends ............................. 1-23

Cyclic Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12

W g n (see ah0 Pressure Design) additional design considerations . . . . . . . . . . . . . . . . . . . 12-1 3 conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 for stainless bellows ........................... 12.23 Lame theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-57 minimum temperature .......................... 10-02

DiSpkcem«it St- . . . . . . . . . . . . . . . . . . 2.14.2.24. 12-06

Earthquake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . seeSeismic

Empty svst- transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.06

Examination acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-07 extent of . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.24. 5.18. 11-01 in-process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.14.1 1.15 liquid pentrant . . . . . . . . . . . . see Liquid Pentrant Examination progressive . . . . . . . . . . . . . . . . . . see Progressive Examination radiographic . . . . . . . . . . . . . . . see Radiographic Examination random . . . . . . . . . . . 1.27. 1.45. 1.62. 2.12. 2.32. 4.12, 11-15 records .................................... 11 -1 1 required . . . . . . . . 1.24. 1.60. 6.04. 11.14, 11.15. 15.13, 15-21 severe cyclic conditions . . . . . . . . . . . . . . . . . . . 10.17, 11-14 Spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62 wpe~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-13 visual . . . . . . . . . . . . . . . . . . . . . . . . . see visual examination ultrasonic .................... see ultrasonic examination

Exclusions for compressors and internal piping . . . . . . . . . . . . . . . . . . 1-8 for interconnecting piping . . . . . . . . . . . . . . . . . . . . . . . . 1-1 9 listed in scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Expansion Joints .................... 1-1 6. 12.23.1 3-09

Extruded Outlet pressure design of . . . . . . . . . . . . . . . . . . . . . . . . . 1.21. 1-70 tees considered as . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

Extruded Welded Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.01

Fillet Weid internal. slip-on flange . . . . . . . . . . . . . . . . . . . . . . . . . . 8-27 pressure containing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 3 size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Fittings

conforming to two grades ........................ 8.18 flared. flareless. or compression types . . . . . . . . . . . 3.6. 12-1 6

B16.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7, 5.01

MSS SP-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Flammable Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 7

Subiect Interpretation - No .

F b P assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 design ............................... 1.67.3-4 .9.7 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.10 long welding neck ............................. 4.05 slipon ................................ .5.12. 8.27 use of aluminum ............................. . l-51 use of raised and flat face metallic . . . . . . . . . . . . . . . . . . 9-07

FkxibiMy Andy& branch connections ............................ 9.01 exemptions from .............................. 1.33 qualification ........................... 13.05, 13-14 thermal expansion data ......................... 15-24

Flexibility Characteridic eífect of branch to run diameters . . . . . . . . . . . . . . . . . . . 1-56 for a tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.55.1.56. 5.01 for components not listed in Appendix D . . . . . . . . . 1.55. 2-24

Flexibility Factors basis for ................................... . l-56 for 616-9 tees ....................... 1.7, 12.08, 12-17 for fabricated intersections . . . . . . . . . . . . . . . . 1.6, 4-1 6. 5-1 5 for pressure piping components . . . . . . . . . . . . . . . . . . . 13-05 for welded elbows .............................. 1.6

Fluid SeMce general hydrocarbon ........................... 6-01 requirements. metallic . . . . . . . . . . 11.16. 12.15. 12.16. 1543 requirements. nonmetallic . . . . . . . . . . . . . . . . . . 11.17. 11-18 responsibility for categorizing . . . . . . . . . . . . . . . . . 4.08. 8-09

Craph¡¡iUt¡on temperature relative to onset ...................... 1-58

Hardness limitations on ................................. 2-2 Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22 testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-20

Heat Fusion Joints ............................ 13-08

Heat Treabnent cooling rate ................................. . l-69 for austenitic stainless steel ....................... 1-65 for bending and forming ........................... 2.2 for flared laps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -03 for valve parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12 governing thickness . . . . . . . . . . . 1.39, 1.59, 4-06, 5.06, 11-06 heating rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69 local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.08, &05 monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.08. 8-05 requirements . . . . . . . . . . . 8.08. 8-21. 8.23. 8.24. 9.03, 9.05.

SP-1 through SP-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24 when radiography is required . . . . . . . . . . . . . . . . . . 1.64. 2-4

Hydrostatic Tests ....................... see Leak Tests

Impact Teds absorbed energy data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 alternative methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.30

12-1 4, 14-01, 14-1 6. 15-1 8




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Subiect Interoretation - No .

base metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.01.1 1.12 exclusions from ....................... 1.76, 5-1 4. 8-30 heat treatment required .......................... 5-19 in qualifying procedures ......................... 8.29 of aluminum filler metals ........................ 2-19 of austenitic stainless steel ........................ 1-65 of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 5 of the heat affected zone .................... 1.76, 5-21 of weldments .................... 1.12, 1.65, 1.76, 5-21 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-23 temperature limitation . . . . . . . . . . . . . . . . . 5.14. 8.30. 14-12

Imperfections (see also Acceptance Criteria) concave root surface ........................ 1.1. 6-04 determination of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32 lack of fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.09 porosity ......................... 1.9, 5.13, 5.16. 5-20 slag inclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20 tungsten inclusions . . . . . . . . . . . . . . . . . . . . . . . . . 1.9. 5 ~ 1 7 undercutting . . . . . . . . . . . . . . . . . . . . . . . . . . 1.14. 2.8. 6-04

Installed Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

Instrument Piping ......................... 7-07, 8.01

Internal Piping, Equipment . . . . . . . . . . . . . . . . . . . . . . . . 1-8

loint Factors for ASTM A 234. ASTM A 31 2, ASTM A 403 . . . . . . . . . . . 2-20 for branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . 8-06 for circumferential welds . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 for longitudinal and spiral welds . . . . . . . . . . . 1.78, 3-1 1, 8-06

Joints alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-07 circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 1 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . 2.6. 3-10 instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13 tapered pipe thread . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1 5 threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 6

lateral Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Leak Tests acceptance criteria . . . . . . . . . . . . . . . . . . . 1.2. 15.22, 16-03 alternative . . . . . . . . . . . . 4.09, 5.07. 6.08. 8-1 5. 12.01. 12-21 as nondestructuve examination .................... 8-3 1 for Category D fluid service . . . . . . . . . . . . . . . . . . . . . . . 1-36 for system designed for O psi . . . . . . . . . . . . . . . . . . . . . . 2-31 isolation of test pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 minimum hydrostatic test pressure . . . . . . . . . . . . . . 2.23. 4-04 minor repairs and additions . . . . . . . . . . . . . . . . . . . . . . . . 1-2 of discharge piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-72 of newly constructed systems . . . . . . . . . . 1.4. 5.02. 5.22. 8-1 5 of piping and vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 of piping connecting equipment .................... 3-3 of replacement piping ..................... 5.22. 12-21 painting before test . .................... 2.6. 3-1 O. 5-23 personnel qualification . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31 pneumatic test . . . . . . . . . . . . . . . . 11 .07. 11 -1 9, 12.02, 13-06 preparation for . . . . . . . . . . . . . . . 2.6, 3-1 O, 5.02, 5.23, 12-03 reduced pressure (hydrostatic test) . . . . . . . . . 1.61. 2.23. 13-1 3


requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.15. 13-13 sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 temperature correction for . . . . . . . . . . . . . . . . . . . 1.35, 1-43

test oressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-04 ta t f lu id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-19

Lethal Substance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.73

Limitations on imperfections ..................... see Imperfections on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 on tubing size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.13. 3-6

liquid Penetrant Examination requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.14

Low Temperature Requirements . . . . . . . . . . . see Impact Tests

Materials API 5L . . . . . . . . . . . . . . . . . . 1.78. 2.4. 3.9. 3.11. 6.01. 6-06 API 5LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.4. 11-05 ASTMA234 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 ASTM A 312 ......................... 1.29. 1.77. 2.20 ASTM A 351 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.13 ASTM A 387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.25 ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.77. 2-20 ASTMA487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-07 ASTMA537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ASTMA570 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 ASTMA587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 ASTM A 633 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 ASTMA658 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.48 ASTM B 241 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.19 ASTM B 337 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 ASTM B 464 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11 austenitic stainless steels . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 bases for design stresses . . . . . . . . . . . . . . . . . . . . . . . . 11 -05 certification . . . . . . . . . . . . . . . . . . . . . . . . 5-1 O. 8.02. 13-10 conforming to two grades . . . . . . . . . . . . . . . . . . . . 8.18. 8-34 notch sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22 reidentification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.19 toughness requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19 unlisted material . . . . . . . . . . . . . . . . . . . 11 .05. 11 40. 15-04

Miter Bends pressure design of ......................... 1.22. 5-11

Near Straight Sawtooth Runs explanation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Nomenclature d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54

t" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75 Tw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-04, 5-16

r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Nonmetallic Piping fluid service requirements . . . . . . . . . . . . . . . . . . 11 -1 7. 11 -1 8 in Category M Fluid Service . . . . . . . . . . . . . . . . . . . . . . 8-35 joint requirements . . . . . . . . . . . . . . . . . . . . . . . . . 7.09. 8-14 pressure design . . . . . . . . . . . . . . . . . . . . . . . . . 14-1 7. 14-18

Cumulative Index . B31.3 Interpretations Vols . 1-1 6



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Subiect interpretation - No .

Notch Smsitive materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22

Ocruional Variations (pressure/temperature diwances) . . . . . . . 1.3. 2.14. 4-11

loads . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50. 2-1 5. 2-1 6. 2-1 7

Owner responsibilities . . . . . . . . . . . . . . . . . . . . . . . 1.26. 2.30. 5-22

Owner's Impector qualifications of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31 responsibilities of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

Pipe alterations of existing pipe ....................... 13-04 curved and mitred segments ..................... 15-14 elbowless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.03 in corroded condition ........................... 2.15 made from plate . . . . . . . . . . . . . . . . . . . . . . . . . . 1.48. 8-36 of noncircular cross section ........................ 3-2 pressure design ......................... 13.07, 14-09 pressure testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.09 spiral welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-03 straight. under internal pressure . . . . . . . . . 10.20, 11 -2 1, 14-1 1

Pipe supports configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.07 longitudinal stress effects . . . . . . . . . . . . . . . . . . . . . . . . . 7-05 use of plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-49

Plutic lined pipe-use of screwed flanges . . . . . . . . . . . . . . . . . 8.33 pipe suppolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-49

Pneumatic Tests . . . . . . . . . . . . . . . . . . . . . . . . see Leak Tests

Poritia4l!4 qualification of welding ......................... 1-66

Poshvcld Heat Treatment . . . . . . . . . . . . . . see Heat Treatment

Preheat . . . . . . . . . . . . . . . . . . . . . . . . . . see Heat Treatment

Pressure k g n for elevated temperatures . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 in the high pressure range ........................ 1-68 of extruded headers . . . . . . . . . . . . . . . . . . . . . . . . 1-21. 1-70 of flanges and blanks ..................... 10-14, 13-15 of miter bends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 of nonmetallic piping components . . . . . . . . . . . . 14-1 7, 14-1 8 Of pipe .................... 1-42, 1-54, 1-57. 1-68. 1-70.

2-11. 11-21. 13-07. 15-06. 15-10 of unlisted components . . . . . . . . . . . . . . . 13-02. 13-03. 13-05 of l isted components ..................... 16-14, 16-18 of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-04.1 3-15

Pressun Rating valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.04 variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.11

Pnrsure Relief ûevices acceptable devices . . . . . . . . . . . . . . . . . . . . . . . . . 2.21. 2-29

S u b i a interpretation - No .

and test pressure . . . . . . . . . . . . . . 11 .07. 1 1 -1 9. 12.04. 14-09 setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.32. 7.01. 12-04 stop valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 O. 12-1 8

Pressure surges loads due to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-50

Pressure-Temperature Rating . . . . . . . . . . . . . . . . . 5-05. 8.34

Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . see Leak Test

P r o g d v e Examination . . . . . . . . 1.5. 1.62. 3.5. 10-09. 10-1 0. 10-1 2. 11.02. 11 .04. 13-1 2. 16.01. 16.02. 16-05

Published Specification . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 5

Radiographic Examination 100% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09 as supplementary examination ..................... 8.38 random radiography . . . . . . . 1.27. 1.45. 1.62. 2-1 2. 2.32. 3-1 2 records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 requirements . . . . . . . . . . . . . . . . . . 6.04. 11.01. 11.05. 12-03 selection of welds for examination . . . . . . . . . . . . . . . . . . 2-25 spot radiography . . . . . . . . . . . . . . . . . . . . . . . . . . 1.62. 3-12 when PWHT is required ...................... 1.64. 2-4

Records certification . . . . . . . . . . . . . . . . . . . . . . . . 5-1 O. 8.02. 10-03 of examinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 1 of hardness tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22 for radiographic examination ...................... 1'10 retention of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Reinforcement. Branch attachment weld . . . . . . . . . . . . . . . . . . . . . . . . . .4.03. 7-08 clarification of terms . . . . . . . . . . . . . . . . . . . . . . . 1.37. 11 -1 0 limits of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.27. 9.04

Repairs to welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.18

Responsibility designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i 0.11 rights of owner's inspection ...................... 10-03

SlfegUardiw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . see Code Coverage

S e i ¡ i C Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.07 stresses due to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . î-1 7

Severe Cydic Conditions cyclic loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 large rapid temperature change .................... 8-09 spiral welded pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-03

Simplified Flexibility Analysis ..................... 1-33

standard Components manufacturers markings ..................... .3.7. 8-02 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.05,8.04. 8-07

(hì Cumulative Index . 631.3 Interpretations Vols . 1-1 6



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~

STD-ASME 831.3 I N T N O * L b - E N G L 0759b7U UbUb8112 b 2 0

Subiect Interpretation

No. Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 0 superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44

Stresses (see also Allowable Stresses) displacement stress range . . . . . . . . . . . . . . . . . . . 7.04. 12-06 due to cold spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 6 due to occasional loads . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 6 due to pressure surges . . . . . . . . . . . . . . . . . . . . . . . . . . 1-50 due to seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17 due to sustained loads . . . . . . . . . . . . . . . 15-1 5. 16.04. 16-1 1 due to thermal gradients . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 longitudinal . . . . . . . . . . . . . . . . 1.20. 1.50. 2-1 5. 2.24. 4.10.

reduction factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1 O 4.12. 6-03R (Vol . 7). 6.07. 7.05. 8-16

Stress Intensification Factors

basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 for 816.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 for fabricated intersections . . . . . . . . . . . . . . . . . . . . 1-6, 5-1 5 for tees . . . . . . . . . . . . . . 1.46. 1.55. 1.71. 5.01. 12.08. 12-1 7 for unlisted components . . . . . . . . . . . . . . . . . . . . . . . . 13-05 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . 1.6. 12-1 1

application of . . . . . . . . . . . . . . . . . 1.34. 2.24. 6-03R (Vol . 7)

Temperature bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-08 design minimum temperature . . . . . . . . . . . . . . . 10.02, 14.08,

large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.09 limitations . . . . . . . . . . . . . . . . . . . . 4-1 3. 5.14. 15-1 2. 15-25 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.11 verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-09

Thermoplastic Piping neat fusion joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-08 solvent cemented joints . . . . . . . . . . . . . . . . . . . . . . . . . 10-8 specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 10-06

14.12. 15.11, 15-16

Tubing category M fluid service . . . . . . . . . . . . . . . . . . . . . . . . 16-1 7 joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.13. 3-6

Thickness Allowances in stress calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20


1 Ultrasonic Examination in place of radiography . . . . . . . . . . . . . . . . . . . . . . . . . 11 -05

I requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17

Unlisted components . . . . . . . . . . 1.6. 1-5 1. 3.6, 4.05. 5.05. 8.7. 10-1 8.

10-1 1. 10-07. 12.09. 13.02. 13.03. 13-05 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Materials

Valves Category M Fluid Service . . . . . . . . . . . . . . . . . . . . . . . . 8-35 Flanged Ball Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-16 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.07. 15-26 pressure build up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.04 ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.05

Visual Examination internal . .......................... 8-1 O. 8.26. 1 3-1 6 requirements ...................... .2.28.10.03.1 3.16

Washers. Use of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5

Weld bevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1 0 definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-03 examination of welds . . . . . . . . . . . . . . . . 10-1 5. 11 .01. 11 -1 4.

fillet size . . . . . . . . . . . . . . . . . . . . . . . . . 1.74. 10.19. 16-06 for branch connections . . . . . . . . 2-1 O. 4.03. 4-1 4. 8.37. 11 -1 0 imperfections . . . . . . . . . . . . . . . . . . . see Acceptance Criteria longitudinal . . . . . . . . . . . . . . . . . . . . . . . . . 2.20. 3-1 1. 4-18 of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1 2 preparation for welding . . . . . . . . . . . . . . . . . . . . 13.01. 14-04 qualification of position . . . . . . . . . . . . . . . . . . . . . . . . . 1-66 reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.08. 11 -08 repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

spacing of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-02

Welder Qualification by others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1 9

13-1 6. 14-1 4. 14-1 5. 15-02

socket . . . . . . . . . . . . . . . . . . 6.02. 6.05. 10-1 9. 1 5.08. 1 6-06

Welding Procedure qualification of . . . . . . . . . . . . . . 1-1 2. 1.65. 1.66. 1.76. 4-1 7.

responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.07. 12-1 2 specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.21. 8-22

8.23. 8.29. 11.09. 14.05. 14-13




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S T D - A S M E B 3 L - 3 I N T NO. 1 5 - E N G L PI 13757b70 05840313 L L 3

ASME B31.3 INTERPRETATIONS NO. 15


General Information

It has been agreed to publish interpretations issued by the B31 Committee concerning B31.3 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies to the Edition or Addenda stated in the interpretation, or if none is stated, to the Edition or Addenda in effect on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. These interpretations are not part of the Code or its Addenda.


ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the B31 Committee, refer to Appendix 2.

Code Reference and Subject indexes


169



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S T D * ASME

Subject

B3L.3 I N T N O - L 5 - E N G L H 0 7 5 9 b 7 0 0 5 8 4 0 3 1 0 5 T 111

B31.3

Fig. 328.5.2B Sketch (3), Socket Welding Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardness Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Metallic Valves Lined with a Nonmetal Para. 300.1.3, Scope; Exclusions , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Para. 302.3.5, Limits of Calculated Stresses Due to Sustained Loads and Displacement Strains . Para. 304.1, Pressure Design of Components; Straight Pipe . . . . . . . . . . . . . . . . . . Para. 304.1.1, Pressure Design of Components; Straight Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Para. 304.2, Curved and Mitered Segments of Pipe.. . . . . . . . . . . . . . . . . . . . . . . . . . Para. 304.3.3, Reinforcement of Welded Branch Connections . . , . . . . , . . . . . . . . . . . . . . . . . . . . . Para. 319.3. I(b), Thermal Expansion Data . . . . . . . . . . . . . . . . . . Para. 323.1.2, Unlisted Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Para. 323.2.2, Lower Temperature Limits, Listed Materials

Para. 323.2.2, Lower Temperature Limits, Listed Materials

Para. 328.2.3, Performance Qualification by Others

Para. 332.4.2(a), Cold Bending and Forming . . . .

Para. 341, Examination . . . . . . . . . . . . . . . . . . . . . . . . . Para. 342 and Para. 344.2, Examination . . . . . . . Para. 345.9.1(a), Examination of Welds Para. X302.2.3, Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table A-1, Allowable Stresses Table 323.2.2, Minimum Temperatures Table 323.2.2, Minimum Temperatures Without Impact Testing for Carbon Steel Materials . . . . Table 323.3.1, Impact Testing Requirements for Metals . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . Para. 323.4, Fluid Service Requirements for Materials . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . .

Para. 331.1.3(b), Heat Treatment Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Para. 335.1.1(c), Alignment; Flanged Joints , . . . . . . . , . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

..................... . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interpretation

15-08 15-20 15-26 15-09 15-15 15-10 15-06 15-14 15-05 15-24 15-04 15-12

15-25

15-19 15-18 15-17 15-07 15-13 15-2 1 15-02 15-22

15-03

15-0 1 15-11 15-16 15-23

File No

831-96-009 B31-96-039 B3 1-96-049 B31-96-010 B3 1-96-020 B31-96-011 B3 1-96-007 B 3 8 1-96-01 B3 1-95-052 B3 1-96-045 B31-95-048 B31-96-015, B31-96-016 B31-96-047 B31-95-046 B3 1-96-037 B3 1-96-036 B3 1-96-034 B3 1-96-008 B 3 7 1-96-01 B 3 1 1-96-04 B3 1-95-045 B3 1-96-043 B31-95-044 B3 1-96-014 B 3 1 1-96-02 B3 1-96-044

171



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

S T D - A S M E B3L.3 I N T N O - 1 5 - E N G L 0 7 5 7 b 7 0 0 5 8 4 0 3 2 T7b = 83 1.3 Interpretations No. 15


15-01, 15-02

Subject:


ASME B31.3~-1995 Addenda, Table A-1, Allowable Stresses

File: B3 1-95-044

Question (1): Are the material requirements of ASME SA-106 the same as ASTM A 106?

Reply (2): Yes.

Question (2): When doing an ASME B3 1.3 system stress evaluation, what allowable stresses are used for ASTM A 106 or ASME SA-106?

Reply (2): Those listed in ASME B31.3~-1995 Addenda, Table A-1 for ASTM A 106.


Subject:


ASME B3 1.3~-1995 Addenda, Para. 345.9.1(a), Examination of Welds

File: B3 1-95-045

Question: In accordance with ASME B3 1.3~-1995 Addenda, is it permissible to perform magnetic particle examination of a circumferential weld in lieu of radiography as specified in para. 345.9.1(a)?

Reply: No.

173



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

-~

STD.ASME B31.3 I N T N O . 1 5 - E N G L 1 0 7 5 9 b 7 0 0584033 7 2 2 = 15-03, 15-04 83 1.3 Interpretations No. 15


Subject: ASME B3 1.3~-1995 Addenda, Para. 323.4, Fluid Service Requirements for Materials


File: B3 1-95-046

Question (1): Does the ASME B31.3~-1995 Addenda permit the use of gray cast iron at temperatures down to - 150°F

Reply (1): Yes, however, see para. 323.4.2(b) and F323.4(a).

Question (2): For temperatures below -20"F, are there any special toughness test requirements for gray cast iron?

Reply (2): No. See Table 323.2.2, Box B-l.

Question (3): For any temperatures below -20°F, are the allowable stresses at -20°F applicable?

Reply (3): Yes.


Subject:


ASME B3 1.3~-1995 Addenda, Para. 323.1.2, Unlisted Materials

File: B3 1-95-048

Question (1): In accordance with ASME B31.3~-1995 Addenda, can API 5L X65 pipe be qualified under para. 323.1.2 for Normal Fluid Service?

Reply (1): Yes.

Question (2): Can API 5L X65 pipe be qualified for applications above operating temperatures of 100°F under para. 323.2.3 for Normal Fluid Service?

Reply (2): Yes.

174



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

S T D - A S M E B 3 1 - 3 INT N O - 1 5 - E N G L 0 7 5 7 b 7 0 0 5 8 4 0 3 4 Ab7 m

83 1.3 Interpretations No. 15 15-05, 15-06, 15-07


Subject: ASME B3 1.3~-1995 Addenda, Para. 304.3.3, Reinforcement of Welded Branch Connections


File: B31-95-052

Question: In accordance with ASME B31.3~-1995 Addenda, para. 304.3.3, is it permissible to multiply the required area replacement in Eq. (6) by factor F from ASME Section VIII, Division 1, 1995 Edition, Fig. UG-37? The nozzle is welded on a cylindrical header as per Fig. UW-16.1 sketch (a).

Reply: No, except as provided in para. 300(c)(3) considering the design conditions of para. 301 and design criteria of para. 302.


Subject: ASME B3 1.3~-1995 Addenda, Para. 304.1.1, Pressure Design of Components; Straight Pipe


File: B3 1-96-007

Question: In accordance with ASME B31.3~-1995 Addenda, para. 304.1.1, shall the quality factor E also include ligament efficiency?

Reply: No; see para. 304.3 for the reinforcement of multiple openings.


Subject: ASME B31.3~-1995 Addenda, Para. 335.1.1(c), Alignment; Flanged Joints


File: B3 1-96-008

Question: In accordance with ASME B31.3~-1995 Addenda, para. 335.1.1(c), prior to bolting up a flanged joint, may the flange faces be out of alignment from the design plane by more than 1/16 in./ft (0.5%), provided the misalignment is considered in the design of the flanged assembly and attached piping in accordance with para. 300(c)(3)?

Reply: Yes.

175



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

~~~

S T D - A S M E 831 .3 I N T N O - 15-ENGL W 0 7 5 7 b 7 0 058Li035 7 T 5

15-08, 15-09, 15-10 83 1.3 Interpretations No. 15


Subject: ASME €431.3~-1995 Addenda, Fig. 328.5.2B Sketch (3), Socket Welding Flange


File: B3 1-96-009

Question: In accordance with ASME B31.3~-1995 Addenda, may the fillet weld shown in Fig. 328.5.2B Sketch (3) (socket welding flange) be repositioned to the inside of the pipe?

Reply: No, unless qualified under para. 304.7.


Subject: ASME B3 1.3~-1995 Addenda, Para. 300.1.3, Scope; Exclusions


File: B31-96-010

Question: Does ASME B31.3~-1995 Addenda apply to internal fuel gas manifolds installed in a fired heater?

Reply: No, see paras. 300.1.3(c) and (d).


Subject ASME B31.3~-1995 Addenda, Para. 304.1, Pressure Design of Components; Straight Pipe


File: B3 1-96-01 1

Question: May the internal pressure design thickness t be computed in accordance with the provisions of ASME B31.3~-1995 Addenda, paras. 304.1.1 and 304.1.2 when t is greater than or equal to D / 6 and P/SE > 0.385?

Reply: Yes. However, it is the responsibility of the designer to provide the special consideration required in para. 304.1.2(b). Alternatively, as an option to the owner, the design may be in accordance with Chapter IX.

176



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

S T D - A S M E B 3 1 - 3 I N T N O . LS-ENGL SI! 17759670 058LiD3b b 3 L S

B 3 1.3 Interpretations No. 15 15-11, 15-12


Subject: ASME B3 1.3~-1995 Addenda, Table 323.2.2, Minimum Temperature Without Impact Testing for Carbon Steel Materials


File: B3 1-96-0 14

Question (1): Does the assigned curve in the second sentence of Box B-3, Table 323.2.2, ASME B31.3~-1995 Addenda refer to the curve assignment from Table A-l?

Reply (1): Yes.

Question (2): If the material has been heat treated per Note (2) or (3), Fig. 323.2.2, is further heat treatment or impact testing of the base metal required for use below the original assigned curve, but above the reassigned curve?

Reply (2): No.


Subject: ASME B3 1.3~-1995 Addenda, Para. 323.2.2, Lower Temperature Limits, Listed Materials


File: B3 1-96-01 5, B3 1-96-01 6

Question (1): In accordance with ASME B31.3~-1995 Addenda, when making blind flanges of carbon steel plate materials which have a Fig. 323.2.2 Curve assignment in Table A-1, is the thickness of the finished blind considered the nominal thickness when using Fig. 323.2.2 to establish the need for impact testing?

Reply (1): Yes.

Question (2): For carbon steel materials with a letter designation in the Min. Temp. column of Table A-1, can flanges manufactured in accordance with ASME B16.5 be used at temperatures down to - 10°F without impact testing regardless of thickness?

Reply (2): No, the requirements of para. 323.2.2 apply.



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

15-13, 15-14 83 1.3 Interpretations No. 15


Subject: ASME B3 1.3~-1995 Addenda, Para. 341, Examination


File: B3 1-96-017

Question: If a fabricated valve meets all the requirements of ASME B16.34, does ASME B31.3~- 1995 Addenda require that nondestructive examination in accordance with ASME B3 1.3 also be performed on the valve?

Reply: No, see also Interpretation 12-12.


Subject: ASME B31.3~-1995 Addenda, Para. 304.2, Curved and Mitered Segments of Pipe


File: B3 1-96-0 18

Question (1): In accordance with ASME B31.3~-1995 Addenda, para. 304.2.1, can the minimum required thickness t , of a bend, after bending, be determined by taking in consideration of lower (pressure) stresses on the outside of a bend (and higher pressure stresses on the inside of the bend) than on a straight pipe with identical wall thickness?

Reply (1): No, except as provided in para. 300(c)(3).

Question (2): In accordance with ASME B3 1.3~-1995 Addenda, Chapter IX (High Pressure Piping), can the minimum required thickness t , of a bend, after bending, be determined by taking into consideration lower stresses on the outside of a bend (and higher stresses on the inside of the bend) than on a straight pipe with identical wall thickness?

Reply (2): No, except as provided in para. 300(c)(3).

178



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S T D - A S M E B 3 1 . 3 INT N O - 1 5 - E N G L 0 7 5 7 6 7 0 0 5 8 4 0 3 8 4 0 4 = 83 1.3 Interpretat ions No. 15 15-1 5, 15-1 6


Subject: ASME B31.3~-1995 Addenda, Para. 302.3.5, Limits of Calculated Stresses due to Sustained Loads and Displacement Strains


File: B3 1-96-020

Question (1): What is the definition of sustained loadings as intended in ASME B31.3~-1995 Addenda, para. 302.3.5(c)?

Reply (1): The Code does not offer for sustained loadings other than in the referenced paragraph. Sustained loads do not typically include forces resulting from applied displacements such as restrained thermal growth. See para. 319.2.3.

Question (2): When flanges are subjected to external forces and moments, is it permissible to calculate the stresses in the flange due to these forces and moments using BPV Code, Section VIII, Division 1, Appendix 2, and using the equivalent pressure calculated from these forces and moments?

Reply (2): The Code does not provide specific design formulas for the design of flange joints subjected to applied external forces and moments except as provided in para. 300(c)(3). However, external forces and moments shall be considered in design. See paras. 3 19.1.1 and 321.1.1.


Subject : ASME B31.3~-1995 Addenda, Table 323.2.2, Minimum Temperature Without Impact Testing for Carbon Steel Materials


File: B31-96-02 1

Question (i): Does the assigned curve in the second sentence of Box B-3, Table 323.2.2, ASME B31.3~-1995 Addenda refer to the curve assignment from Table A-l?

Reply (1): Yes.

Question (2): If the material has been heat treated per Notes (2) or (3), Fig. 323.2.2, is further heat treatment or impact testing of the base metal required for use below the original assigned curve, but above the reassigned curve?

Reply (2): No.

179



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15-17, 15-18 B3 1.3 Interpretations No. 15


Subject: ASME B31.3-1990 Edition, Para. 332.4.2(a), Cold Bending and Forming


File: B3 1-96-034

Question: In accordance with ASME B31.3-1990 Edition, para. 332.4.2(a), cold bending and forming, can the elongation value for SA-106 B reported in the Certified Material Test Report be substituted for the specified basic minimum elongation in calculating the maximum fiber elongation?

Reply: No.


Subject: ASME B3 1.301993 Addenda, Para. 33 1.1.3(b), Heat Treatment Requirements


File: B3 1-96-036

Question (1): In accordance with ASMEB31.3c-1993 Addenda, Table 331.1.1 and para. 331.1.3(b), do socket welds and seal welds with P-No. 5 materials with a chromium content greater than 3% but less than lo%, a carbon content less than 0.15%, and a weld throat thickness of 0.5 in. or less require postweld heat treatment if matching filler material is used?

Reply (1): Yes, unless applicable provisions of para. 331.1.3(b) are met.

Question (2): In accordance with ASME B31.3~-1995 Addenda, Table 331.1.1 and para. 331.1.3(b), do socket welds and seal welds with P-No. 5 materials with a chromium content greater than 3% but less than lo%, a carbon content less than 0.15%, and a weld throat thickness of 0.5 in. or less require postweld heat treatment if a non-air-hardening filler metal is used?

Reply (2): No.

Question (3): In accordance with ASME B31.3~-1995 Addenda, Table 331.1.1 and paras. 331.1.3(b) and 331.1.7, if a non-air-hardenable filler is used, is the base metal HAZ required to be 241 maximum Brinell hardness for P-No. 5 materials with chromium content greater than 3% but less than lo%?

Reply (3): Yes, unless the applicable provisions of para. 331.3(b) are met.

Question (4): In accordance with ASME B31.3~-1995 Addenda, Table 331.1.1 and para. 331.1.3(b), do the requirements of para. 331.1.3(b) override the requirements of Table 331.1.1 relating to base metal group and/or the specified minimum tensile strength?

Reply (4): No, unless the applicable provisions of para. 331.1.3(b) are met.



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

B 3 1.3 Interpretations No. 15 15-19, 15-20


Subject: ASME B3 1.3-1996 Edition, Para. 328.2.3, Performance Qualification by Others


File: B3 1-96-037

Question: In accordance with ASME B31.3-1996 Edition, para. 328.2.3, is it acceptable for an employer to accept a welder performance qualification previously conducted by an organization whose welder qualification program, with the exception of testing under the full supervision and control of the manufacturer, contractor, assembler, or installer, complies fully with the provisions of ASME Section IX?

Reply: No.

interpretation: 15-20

Subject: ASME B31.3-1993 Edition, Hardness Testing


File: B3 1-96-039

Question: Does ASME B31.3-1993 Edition require P-No. 1 carbon steel welds, hot bends, and hot-formed components locally heat treated to be hardness tested?

Reply: No.

181



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

STDmASME B 3 1 . 3 I N T NO. I S - E N G L e U759b70 0584043 T T 7 U

1 5-2 1 B3 1.3 Interpretations No. 15


Subject: ASME B3 1.3a-1993 Addenda, Paras. 342 and 344.2, Examination


File: B3 1-96-04 1

Question (1): Does ASME B31.3a-1993 Addenda, paras. 342 and/or 344.2 require that personnel performing visual examinations required by paras. 341.4 and 344.7 be qualified and certified in accordance with SNT-TC- 1 A, Recommended Practice for Nondestructive Testing Personnel Qualification and Certification?

Reply (i): No.

Question (2): Does ASME B31.3a-1993 Addenda, paras. 342 and/or 344.2 require that personnel performing visual examinations required by paras. 341.4 and 344.7 be qualified and certified to AWS QCl, Standard for Qualification and Certification of Welding Inspectors?

Reply (2): No.

Question (3): Does ASME B31.3a-1993 Addenda, paras. 342 and 344.2 permit that the visual examinations required by paras. 341.4 and 344.7 be performed by personnel that (1) meet the physical requirements of ASME BPV Code, Section V, Article 9, (2) are competent to perform visual examination in accordance with the manufacturer’s written procedures and (3) the employer certifies and makes available records of the examiner which show dates and results of qualifications?

Reply (3): Yes.

Question (4): Does ASME B31.3a-1993 Addenda, paras. 342 and 344.2 permit that the visual examinations required by paras. 341.4 and 344.7 be performed by personnel that (1) meet the physical requirements of ASME BPV Code Section C, Article 9, (2) have training and experience commensurate with the needs of the visual examinations required by paras. 341.4 and 344.7, (3) have demonstrated competence to perform the visual examinations using the employer’s written procedures through written and practical testing administered by the employer, and (4) the employer certifies and makes available records of the examiner which show dates and results of qualification?

Reply (4): Yes.

182



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STD.ASME B3L.3 I N T N O . L S - E N G L M 0 7 5 9 b 7 0 0 5 8 4 0 4 2 7 3 5 m

B3 1.3 Interpretations No. 15 15-22, 15-23, 15-24


Subject: ASME B31.3-1996 Edition, Para. X302.2.3, Leak Test


File: B3 1-96-043

Question: In accordance with ASME B31.3-1996 Edition, para. X302.2.3, is a pneumatic leak check of an expansion joint at a test pressure of 110% of the design pressure, in accordance with para. 345.5, an acceptable test?

Reply: No.


Subject: ASME B31.3-1996 Edition, Table 323.3.1, Impact Testing Requirements for Metals


File: B3 1-96-044

Question: In accordance with ASME B3 1.3-1996 Edition, when qualifying welding procedures which require impact testing, is the thickness range qualified to T/2 to T + Y4 in. rather than the range given in ASME Section IX, QW-403.10?

Reply: Yes, provided the criteria and thickness limits specified in ASME Section IX, para. QW- 403.10 are not exceeded. See ASME B31.3, Table 323.3.1, box A-5.


Subject:


ASME B3 1.3-1996 Edition, Para. 3 19.3.l(b), Thermal Expansion Data

File: B3 1-96-045

Question (1): In accordance with ASME B31.3-1996 Edition, para. 319.3.1(b), must all thermal conditions of a piping system be evaluated for end reactions on equipment?

Reply (1): Yes.

Question (2): Does ASME B31.3 provide specific allowable piping load limits for end reactions on equipment?

Reply (2): No.

183



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15-25, 15-26 83 1.3 Interpretations No. 15


Subject: ASME B3 1.3~-1995 Addenda, Para. 323.2.2, Lower Temperature Limits, Listed Materials


File: B3 1-96-047

Question: In accordance with ASME B31.3~-1995 Addenda, Para. 323.2.2 and Table 323.2.2, does P-No. 1 carbon steel subject to metal temperatures between -20°F and - 50°F with coincident pressure in excess of 25% of the maximum allowable design pressure require impact testing?

Reply: Yes, except as provided in Note ( 5 ) of Table 323.2.2.


Subject: ASME €331.3-1996 Edition, Metallic Valves Lined with a Nonmetal


File: B3 1-96-049

Question (1): Does ASME B31.3-1993 Edition prohibit the use of a metallic valve lined with a nonmetal in Category M Fluid Service?

Reply (1): No.

Question (2): Does ASME B31.3-1993 Edition address a sensitive leak test for a metallic valve lined with a nonmetal?

Reply (2): No.

184



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

STDsASME B31-3 INT N O - 1 5 - E N G L 0 7 5 7 b 7 0 0 5 8 4 0 4 q 708

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 831.3-1 990 or later Editions. References in brackets



No. -

introduction . . . . . . . . . . . . . . . . . . . . . . . . . . l-3, 1-6, 1-7, 13-04 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10, 8-17 300(b) . . . . . . . . . . ..1-26, 1-32, 4-08, 5-03, 8-09, 10-11, 13-14 3OOíc) 3-2, 3-4, 4-10, 6-03R (Vol. 7), 7-05, 8-30, 13-02 300W [300(e)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -3 , 1-6, 1-7 300.1 . . . . . . . . . . . . 7-10, 8-17, 9-06, 12-20 300.1.1 . . . . . . . . .1 , 4-19, 6-01, 8-01, 9-02 Fig. 300.1.1 .................... 1-8, 1-19, 2-26, 7-10, 8-17 300.1.3 [300.1.4] 1-8, 1-16, 1-19, 1-26, 3-2, 15-09

...................... .lo-O5

Category D Fluid Service . . . . . . . . . . . . . . . . .4-13, 5-03, 6-01 300.2

owner . . . . . . . . . . . . . piping components . . . . . . . . . . . . . . . . . . . . . . piping system . . . . . . . .

301 . . . . . . . . . .

. . . . . . . . . . . 301.3 . . . . . . . . . . . . . . . . . . . . . . . . .

301.7.2 . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . l -50

4-1 1, 7-01, 7-04, 8-04, 14-09 302.2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-15 302.3.2 . 1-1 8, 1-38, 2-1 6, 3-1 3, 8-25, 1 1-05 302.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Table 302.3.4 . . . . . . . . . l-42, 1-78, 2-20, 3-1 1 302.3.5 . . . . . . . . . . . . . . . . . . 1-20, 1-50, 2-14, 2-15, 2-24, 3-4,

4-10, 4-1 2, 6-03R (Vol. 71, 6-07, 7-04, 7-05, 8-16, 15-15

302.3.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-50, 2-15, 2-16, 2-17 302.4.. . . . . . . . . . . . . . . . . . . . . . . . . . l -20

1-42, 1-54, 1-70, 13-07, 15-06, 15-1 O

304.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-14 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . Fig. 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3 . . . . . . . . . . . . .l-21, 1-4

304.1.2 . . . . . . . . . . . . . . . . .l-42, 1-57, 1-68, 1-70, 2-11, 10-20

Code Reference, Interpretation

No.

304.3.2 304.3.3 ................................

8-37, 1 1-1 O, 12-05, 14-10, 15-05 Fig. 304.3.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-37

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

. . . . . . . .9-1 o 304.7.2 . . . . . . . . . . . . 1-51, 3-2, 4-05, 5-05, 5-11, 6-09, 10-07,

10-1 1, 10-1 8, 12-09, 13-02, 13-03, 13-05, 13-1 1 304.7.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

. . . . . . .3-8, 3-9

305.2.3 . . . . . . . . . . . . .

. . . . . . . . . . . . . 1 1-03 308.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-02, 6-05 311.2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-04 312 . . . . . . . . . . . . . . . . . . . . . . .

Table 314.2.1 . . .

315.3.. . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . 8-13

. . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

319.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

319.4.1 . . . . . . . . . . . . . . . . . .

319.7.. . . . . . . . . . . . . . . . . . .l-16, 7-05 321.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

322.6.1 . . . . . . . . . . . . . . . . . . . . .lo-10, 12-18

323.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19 323.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11, 1-15, 1-48, 2-1,

6-06, 8-07, 8-1 9, 1 1-03, 15-04 323.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Cumulative Index - 83 1.3 Interpretations Vols. 1 - 1 5 (a)



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~~

STD-ASME B31.3 I N T NO 15-ENGL 0759b70 0 5 8 4 0 4 5 b44


No . - 323.2.1 ........................................... 1-13 323.2.2 ................................... .15-12. 15-25 Fig . 323.2.2 . . . . . . ............................ .l 4-08 Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . . . . 1-12, 1-48, 1-65, 1-76, 2-1 9, 3-8, 4-01, 4-1 5, 14-1 2, 15-1 1, 15-1 6

323.3 ........................................ 1-76, 5-13

Table 323.3.1 [Table 323.2.21 . . . . . . . . . 1-12, 1-76, 4-17, 5-19, 5-21, 8-29,

10-2, 11-12, 15-23 323.3.4 . . . . . . . . . . . . ........................... 8-30 323.3.5 ............................................ 2-9 323.4 ............................................ 15-03 323.4.2 ................................... .lo-01, 10-19 Table 323.3.5 ...................................... 5-14 Table 326.1 . . . . . . . . . . . . . . . . . . . .l-11, 1-51, 2-3, 8-07, 8-34 328 ........................................ 7-02, 12-12 328.1 ............................................ 12-07 328.2 [327.5] ......................... .l-66, 11-09, 14-13 328.2.1 [327.5.1, 327.5.21 . . . . . . . . . . . . . . . . .l-76, 4-17, 8-29

328.4 . . . . . . . . .

328.5.1 (327.4.13 ................................... 5-17 328.5.2 [327.4.2]. ..................... Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . . . . . . 1-2

8-27, 15-08 328.5.4 [327.4.4] . . . . . . . . . . . . . . . . . . . 1-59, 1-74, 2-10, 4-03,

4-14, 7-08, 8-13, 10-04, 13-11 Fig . 328.5.4 [Fig . 327.4.41 . . . . . . . . . . . . 1-59, 1-74, 4-03, 4-16,

7-08 328.6 ............................................. 2-18 330 ..................................

Table 330.1.1 ...................................... 9-05 330.1 ............................................. 8-23

331 .............................................. 8-12 33 1.1.1 ............................... .8-08, 9-05, 14-01 Table 331.1.1

[Table 331.3.11 . . . . . . . . . 1-69, 2-2, 5-06, 8-24, 9-03, 12-14, 14-1 6

331.1.2 ........................................... 8-05 331.1.3 1331.3.61 . . . . . . . . . . . . . . 1-39, 1-59, 4-06, 5-06, 9-03,

11-06, 14-01, 15-18 331 . 1.4 [331.1.2] ................................... 5-08 331.1.6 [331.3.4] ................................... 5-08 331.1.7 I331.3.21 ............................. .l-78, 8-22 331.2.2 I331.1.11 ............................. .l-39, 1-78 331.3.4 ........................................... 8-05 331.3.7 ........................................... 8-05 332.1 ............................................. 8-03 332.2 1329.13 ...................... .l-23, 1-53, 4-02, 8-20 332.4 1329.3, 330.21 ................................. 2-2 332.4.2 .................................... 11-03, 15-17 335.1.1 .......................................... 15-07 335.2 .............................................. 2-5 340.2 [336.1.2] .................................... 1-26 340.3 (336.31 ............................... .l-10, 10-03


No . - 340.4 1336.2) ...................................... 1-31

........................... 10-16, 15-13 6.1.31 . . . . . . . .l-10, 1-26, 1-27, 2-28, 10-03

341.3.1 1336.51 ............................... .l-64, 2-4 341.3.2 .......................... Fig . 341.3.2 [Fig . 327.4.1). . . . . . . . . . . . . . . . . . . . ..5-09, 13-16 Table 341.3.2 ........................ .14-02, 14-07, 14-15

[Table 327.4.1Al ........... 1-1, 1-9, 1-14, 1-41, 2-8, 5-04,

[Table 341.3.2Al . . . . 8-32, 8-38, 9-04, 11-08, 11-14, 12-22, 5-13, 5-16, 5-17, 5-18, 5-20, 6-04, 7-06,

13-16 ..................................... 14-14 , 336.5.41 . . . . . . . . . 1-62, 2-25, 2-32, 3-5, 3-14,

10-09, 10-12, 11-02, 11-04, 13-12 341.4 1336.51 . . . . . . . . . . . . . . . . . .1-24, 1-45, 3-12, 5-20, 11-01 341.4.1 [336.5.1] . . . . . . . . . . . . . . 1-10, 1-26, 1-27, 1-60, 2-12,

2-28, 3-7, 3-12, 4-12, 5-10, 8-02, 8-10, 8-26, 10-03, 10-17,

11-11, 11-14, 11-15 ............................. 8-38

341.4.3 .......................................... 8-10 . . . . . . . . . . . . . . . . . . 8-38

............................ 15-21

............................. 2-28 . . . . . . . . 2-28

344.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-12

... 1-10, 1-60, 2-12

. . . . . . . . . . . . . 1-60

344.7.1 ............................ 345 [337] ...................... .l-2, 345.1 [337.1] . . . . . . . . . . . . .l-4, 1.30, 4-04, 6-08, 8-15, 12-21 345.2.2 ........................................... 8-31 345.2.4 [337.4.3] ................................... 1-35 345.2.6 [337.1] ............................... .l-2, 5-22 345.3 [337.3] ...................... .2-6, 3-10, 5-02, 12-03

.......................... 8-04

.......................... 1 2-1 9 345.4.2 1337.4.11 . . . . . . . . . 1-35, 1-61, 1-63, 2-23, 4-04, 9-09,

13-1 3 345.4.3 [337.4.2]. .................................. 1-63 345.5 1337.4.41 . . . . . . . . . . . . . .l-35, 1-43, 6-08, 11-07, 13-06 345.5.2 .......................................... 11-19 345.5.4 .......................................... 12-02 345.7 [337.5.2] .................................... 1-36 345.8 [337.6] ................................ .l-25, 3-10 345.9 [337.5.1] ........ 4-09, 5-07, 6-08, 8-15, 10-15, 12-01,

12-21, 15-02 A304 ............................................. 8-14 A304.1.1 .................................. .14-17, 14-18 A304.5.1 .......................................... 1-67 A304.7.2 ......................................... 13-08 A305 ............................................ 11-17 A314 ............................................. 8-33 A323.4.2 ................................... 10-06, 11-18 A327.2.4 .......................................... 7-09 A328.2(a) ........................ . . . . . . . . . . . . . .1 0-8 A328.2.1 ......................... .............. 8-14 A328.5 . . . . . . . . . . . ................ .8-14, 10-08, 13-08

íb) Cumulative Index . 831.3 Interpretations Vols . 1-15



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STD-ASME B 3 4 . 3 I N T N O - 1 5 - E N G L II 0757b70 058404b 5 8 0 9


No. -

... . . . . . . . . . . . . . . . . . . . .11-21, 14-1 1

M305.1 . . . . . . . . . . . . . . . . . . . . . . . .12-15 M307.2 . . . . . . .

. . . . . . . . . . . . . . . . . . . 2-13, 3-6 M323.1.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .


No.

Appendix A Table A-1 [Table i ] . . . . . . . . . . 1-13, 1-18, 1-29, 1-38, 1-48,

1-77, 2-1, 3-8, 3-9, 3-13, 4-12, 4-13, 6-01, 6-06, 7-03, 8-11,

8-18, 8-25, 8-34, 8-36, 11-13, 12-09, 15-01

Table A-1 B [Table 11 . .l-78, 2-20, 4-18, 7-03 Appendix D . . . . . . . . . -6, 1-7, 1-34, 1-46, 1-55,

1-56, 1-71, 2-7, 2-24, 4-16, 5-01, 5-1 5, 6-06, 12-08, 12-1 1, 12-1 7, 13-05

. . . . . . . . . . . . . . . . . 1-44 5-10

. . . . . . . . . . . . . . . . . . . . 5-12 Appendix H . . . . . . . . . . . . . . . . . . . . . .

Appendix M ... . . . . . . . . . . . . . . . . . .

Appendix X, X3.2.2 . . . . . . . . . . . . . . . . . . . . . . Appendix X, X3.1.3 . . . . . . . . . . . . . . . . . . . .12-23

Appendix X, X302.2.3 . . . . . . . . . . . . . . . . .15-22 Case 137.. . . . . . . . . . Case 141 . . . . . . . .

Cumulative index - 631.3 Interpretations Vols. 1-1 5



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S T D - A S M E €331.3 I N T N O - 15-ENGL 1 0 7 5 7 b 7 0 0 5 8 4 0 4 7 LI17

SUBJECT INDEX

Subject Interpretation

N O . - Acceptance Criteria pressure tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2 weld . . . . . . . . . . . . . . . . . 1.1, 1.9. 1.14. 1.41. 2.8. 5.09. 5.13.

5-1 7. 5-1 8. 5.20. 6.04. 7.06. 8.32. 12.22. 13-1 6. 14.02. 14-07

Allowable loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.06

Allowable Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12 bases for . . . . . . . . . . . . . . .1.18, 3.13. 8.11. 8.25. 10.13. 15-01 for ASTM A 312 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 for ASTM A 351 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13 for ASTM A 387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25 for ASTM A 570 . . . . . . . . . . . . . . . . for ASTM A 587 . . . . . . . . . . . . . . . . for ASTM A 671 . . . . . . . . . . . . . . . . for ASTM 6 464 . . . . . . . . . . . . . . . . for austenitic stainless steels . . . . . . .

Alterations of Piping . . . . . . . . . . .

Alternative Tests . . . . . . . . . . . . . . .

Authorized Inspector . . . . . .

Bellows . .

Bending

Bends corrugated . . . . . . . . . . . . . . . . . . . . . miter . . . . . . . . . . . . . . . . . . . . . . . . . reduction of outside diameter . . . . .

. . .

. .

. .

. .

. .

. . . . . . . . . . . . . . . . . . 1-38

. . . . . . . . . . . . . . . . . . 1-13

. . . . . . . . . . . . . . . . . . 1-48

. . . . . . . . . . . . . . . . . . 8-11

. . . . . . . . . . . . . . . . . . 3-13

. . . . . . . . . . . . . . . . . 13.04

. . . . . . . . . .see Leak Tests

. . . see Owner's Inspector

. . . . . . . . . . . . . . 13-09

.4.02, 8.03. 15-1 7

. . . . . . . . . . . . . . . . . . 1-23

. . . . . . . . see Miter Bends

. . . . . . . . . . . . . . . . . . 8.20

. . . . . . . . . . . . . . . . . . 8-14 Bonding Qualification Test hot gas welded . . . . . . . . . . . . . . . . . . . minimum burst pressure . . . . . . . . . . . . . . . . . . . . . . . . .7.09, 8-1 4 procedure specifications for plastic piping . . . . . . . . . . . . . . 10-08 solvent cement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

Bonds heat fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.09

Bolting Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15


No.

Branch Connections extruded outlets ......................... .1.37. 2.27. 6-09 flexibility analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-01 integrally reinforced fitting ..................... 4.05. 1 1-1 0 projection into run pipe . . . . . . . . . . . . . . . . . . . . . . . .8.28. 9-03 reinforcement . . . . . . . . 8.06. 8.37. 12.05. 12-1 3. 4-1 O, 15-05 weld requirements . . 2.1 O, 4.03, 4.14, 7.02, 7.08, 0.04, 13-1 1

Brazed joints for flammable service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 7

Buckles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.23. 1-53

Cast Irons specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i 0.01

Category D Fluid Service alternative pressure test for . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.36 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.13, 5-03 radiographic examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38

Category M Fluid Service clarification of term . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-73, 9-02 double contained piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35 leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 liquid oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.35, 9.02, 12-1 5 tubing size limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.13 "very small quantity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-40

Code Coverage 631.3 versus 631.4 . l-47, 7-10 fired heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . l 5.09 general hydrocarbon service . . . . . . . . . . . . . . . 6.01

. . . . . . . . . . . . . . . 8-01

. . . . . . . . . 5.22, 12-21

. . . . . . . . . . . . . . . 8-17 oil heating system . . . . . . . . . . . . . . . . . . . . . . 4-19 radioactive fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 2-20 synfuel plant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.52 2-26 tobacco plant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

Components (see also Fittings. Flanges. Standard

certification . . . . . . . . . . . . . . . . . . . . . . . . .1.26. 3.7. 5-1 O. 13-1 0 design conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 fabricated or flared laps . . . . . . . . . . . . . . . . . . . . . . . 1 1.03. 12-1 6

components. Unlisted and Valves)




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

STD-ASME B 3 1 - 3 INT NO . 15-ENGL m


No . - in-line sensing devices ................................ 8.01 referenced standards .......................... . l-44, 5-1 O

Compressors internai piping ...................................... . l-8

Corrugated Bends .................................. 1.23

Cyclic loading .................................... 5.12

Design (see also Pressure

additional design considerations ...................... 12.13 conditions .......................................... 2-3 for stainless bellows ............................... .l 2.23 Lame theory ....................................... 1.57 minimum temperature .............................. 10.02

Design)

Displacement Stress .................... .2.14. 2.24. 12-06

Earthquake .................................. see Seismic

Empty System transportation ...................................... 9.06

Examination extent of .............................. .1.24. 5.18. 11-01 in-process .................................. .3.14. 11-15 liquid pentrant . . . . . . . . . . . . . . see Liquid Pentrant Examination progressive .................... .see Progressive Examination radiographic . . . . . . . . . . . . . . . . . . see Radiographic Examination random ........................... 1.27. 1.45. 1.62. 2.12.

records .......................................... 11-11 required ........ 1.24. 1.60. 6.04. 11.14. 11.15. 15.13. 15-21 severe cyclic conditions ...................... .1 0.1 7. 11-14

visual .............................. see visual examination ultrasonic ....................... see ultrasonic examination

2.32. 4.12. 11-15

Spot .............................................. 1-62

Exclusions for compressors and internal piping .................... . l-8 for interconnecting piping ............................ 1.19 listed in scope ..................................... .1 0-5

Expansion Joints ...................... . l-1 6. 12.23. 13-09

Extruded Outiet pressure design of ............................. .1.21. 1-70 tees considered as .................................. 1.55

Extruded Welded Tee .............................. 5.01

Fillet Weld internal. slip-on flange ............................... 8.27 pressure containing .................................. 8.13 size .............................................. 1-74 use ............................................... 10-4

Fittings

conforming to two grades ............................ 8-18 816.9 ........................................ 1-7, 5-01

(f)


No . - flared. flareless. or

compression types .......................... .3.6. 12-16 MSS SP-75 ........................................ 1-11


Flanges assembly ........................................... 2-5 design ................................... .1.67. 3.4. 9-7 general ........................................... 9.1 0 long welding neck .................................. 4.05

use of aluminum .................................... 1.51 use of raised and flat face metallic ..................... 9.07

SIip-On ...................................... .5.12, 8-27

Flexibility Analysis branch connections ................................. 9.01 exemptions from .................................... 1.33 qualification ............................... .13.05, 13-1 4 thermal expansion data ............................ .i 5.24

Flexibility Characteristic effect of branch to run

diameters ........................................ 1.56 for a tee ............................... .1.55, 1.56. 5-01 for components not listed

in Appendix D ............................. .1.55. 2-24

Flexibility Factors basis for ......................................... . l-56 for 616.9 tees ......................... ..1.7. 12.08. 12-17 for fabricated intersections .................. . l-6, 4.16. 5-15 for pressure piping components ...................... 13.05 for welded elbows .................................... 1.6

Fluid Service general hydrocarbon ................................ 6.01 requirements. metallic . . . . . . . . . . . 11.16. 12.15. 12.16. 15-03 requirements. nonmetallic .................... .l l -1 7. 1 1-1 8 responsibility for

categorizing ................................ .4.08. 8-09

Graphitization temperature relative to

onset ........................................... 1-58

Hardness limitations on ....................................... 2.2 records ........................................... 8-22 testing ............................................ 15.20

Heat Fusion joints ............................... . 1 3.08

Heat Treatment cooling rate ....................................... . l-69 for austenitic stainless steel .......................... . l-65 for bending and forming ...... for flared laps . . . . . . . . . . . . . . . for valve parts .............. governing thickness ......... heating rate ................ local ..................... monitoring .................

Cumulative Index . 63

........................ 2-2

...................... 11-03

....................... 8-12

. .1.39. 1.59. 4.06. 5-06. 11-06

....................... 1-69

. . . . . . . . . . . . . . . . . .5-08. 8-05

. . . . . . . . . . . . . . . . . .5.08. 8-05

. 3 interpretations Vols . 1-1 5



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S T D - A S M E B 3 L - 3 I N T NO . 1 5 - E N G L 0759b70 05840Li7 29T 111


No.

requirements . . . . . . . 8.08. 8.21. 8.23. 8.24. 9.03. 9.05. 12.14.

SP-1 through SP-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.24 when radiography is

required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-64, 2-4

Hydrostatic lests . . . . . . . . . . . . . . . . . . . . . . . . . . s e e Leak Tests

14.01. 14.16. 15-18

Impact lests absorbed energy data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 alternative methods 8-30 base metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.01, 1 1-1 2

. . . . .1.76, 5.14, 8-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

. . . . . . . . . . . . . . . . . . . . . . . . . 8-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

of austenitic stainless steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-65 of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15 of the heat affected zone . . . . . . . . . . . . . . . . . .l-76, 5-21 of weldments . . . . . . . . . . . . . . . . . . . . . . .l-12. 1-65, 1-76. 5-21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-23 temperature limitation . . . . . . . . . . . . . . . . . . . .5.14, 8-30, 14-12

Imperfections (see also Acceptance Criteria) concave root surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1. 6-04 determination of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32 lack of fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09 porosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9, 5.13. 5.16. 5-20 slag inclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20 tungsten inclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-9, 5-17 undercutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 4, 2.8, 6-04

Installed Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -30

Instrument Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.07, 8-01

Internal Piping. Equipment .......................... . l -8

Joint Factors for ASTM A 234.

for branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.06 for circumferential welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-42 for longitudinal and spiral

welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-78, 3-1 1, 8-06

ASTM A 31 2. ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . 2.20

Joints alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l 5.07 circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.11 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.6, 3-10 instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.07 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13 threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-1 6

Lateral Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Leak lests acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2, 15-22 alternative . . . . . . . . . . . . . .4.09. 5.07. 6.08. 8-1 5. 12.01. 12-21 as nondestructive examination . . . . . . . . . . . . . . . . . . . . . . . . . 8.31 for Category D fluid service . . . . . . . . . . . . . . . . . . . . . . . . . . l-36 for system designed for

o psi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31


No.

isolation of test pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 leakage . . . . . . . . . . . 1.4 minimum hydrostatic test

. . . . . . . . . . . . . .

pressure . . . . . . . . . . . . .

of discharge piping . . . of newly constructed

systems . . . . . . 1.4, 5-02, 5-22, 8-15

of piping connecting

of replacement piping painting before test . . . personnel qualification

preparation for . .

equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

1-61, 2-23, 13-13

test pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-04

lethal Substance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.73

Limitations on imperfections . . . . . . . . . . . . . . . . . . . . . . . . . . see imperfections on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 on tubing size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.13. 3-6

liquid Penetrant Examination requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-1 4

Low Temperature Requirements . . . . . . . . . . . . . . . . . . . . . . . . . see Impact Tests

Materials API 5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.78. 2.4. 3.9. 3-1 1.

6.01. 6-06 API 51x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4. 11-05 ASTM A234 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

ASTM A 387

ASTM A487 ASTM A537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ASTM A570 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 ASTM A587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 ASTM A633 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 ASTM A658

ASTM 6 337 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 ASTM 6 464 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11 austenitic stainless steels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.13

notch sensitive reidentification . . . . . . . . . . . . . . . . . . .

Cumulative Index . B31.3 Interpretations Vols . 1-15



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i <

S T D - A S M E B 3 L - 3 INT NO . 15-ENGL W 0757b70 0584050 T O 1 W

Interpretation No . - Subject

toughness requirements .............................. 5.19 unlisted material ...................... .l l-05, 1 1.20. 15-04

Miter Bends pressure design of ............................. . l-22, 5-1 1

Near Straight Sawtooth

explanation of ...................................... 1.33 Runs

Nomenclature d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.54 T ................................................ 1-28 t , ................................................ 1-75 . T,,, .......................................... 5.04. 5-16

Nonmetallic Piping fluid service requirements ..................... 1 1-1 7. 1 1 -18 in Category M Fluid Service .......................... 8.35 joint requirements ............................. .7.09. 8-14 pressure design ............................. .14.17. 14-18

Notch Sensitive materials .......................................... 2.22

Occasional Variations

loads ............................. .1.50. 2.15. 2.16. 2-17

Owner responsibilities ........................... . l -26, 2.30. 5-22

Owner's Inspector qualifications of ................................... . l-3 1 responsibilities of .................................. . l -26

(pressure/temperature allowances) . . . . . . . . l-3, 2-1 4. 4-1 1

Pipe alterations of existing pipe ........................... 13.04 curved and mitred segments ......................... 15.14 elbowless ......................................... 8.03 in corroded condition ............................... 2.15 made from plate .............................. .1.48, 8.. 36 of noncircular cross section ............................ 3.2 pressure design . . . . . . . . . . . . . ............... .13.07, 14-09 pressure testing ..................................... 9.09 spiral welded ...................................... 7.03 straight, under internal pressure .......... .10.20, 1 1.21, 14-1 1

Pipe supports configurations ...................................... 6.07 longitudinal stress effects ............................. 7.05 use of plastic ....................................... 1.49

Plastic lined pipe . use of screwed flanges ................... 8.33 pipe supports ...................................... 1-49

Pneumatic Tests .......................... .see Leak Tests

Positions qualification of welding ............................. , l-66

Postweld Heat Treatment . . . . . . . . . . . . . . see Heat Treatment


No . - Preheat .............................. see Heat Treatment

Pressure Design for elevated temperatures ............................ -3-4 in the high pressure range ............................ 1.68 of extruded headers ........................... .1.21, 1-70 of flanges and blanks ........................ .10.14, 13-15 of miter bends ..................................... 1.21 of nonmetallic piping components . . . . . . . . . . . . . .14.17, 14-1 8 of pipe ............................ 1.42, 1.54. 1.57. 1.68.

of unlisted components . . . . . . . . . . . . . . . . .13.02. 13.03. 13-05 of valves ................................... .8.04. 13-1 5

1.70. 2.11. 11.21. 13.07. 15.06. 15-10

Pressure Rating vaive ............................................. 8.04 variations .......................................... 4.11

Pressure Relief Devices acceptable devices ............................ .2.21. 2-29 and test pressure . . . . . . . . . . . . . . . 1 1.07. 1 1 -1 9. 12.04. 14-09 setting ................................ .1.32. 7.01. 12-04 stop valves ................................ .l 0.1 O. 12-1 8

Pressure Surges loads due to ....................................... 1.50

Pressure-Temperature Rating . . . . . . . . . . . . . . . . . . .5.05. 8-34

Pressure Test .............................. .see Leak Test

Progressive Examination . . . . . . . . . . . . . 1.5. 1.62. 3.5. 10.09. 10.10. 10-12

1 1 .02. 11.04. 13-1 2

Published Specification ............................. 1.15


as supplementary examination ......................... 8.38 random radiography . . . . . . . . . . . . . . . . . 1.27, 1.45. 1.62. 2.12.

records ........................................... 1.1 0 requirements .................... .6.04. 11.01. 11.05. 12-03 selection of welds for

examination ...................................... 2.25 spot radiography .............................. . l-62, 3-12 when PWHT is required ........................ .1.64. 2-4

1 OO0/o ............................................ 5.09

2.32. 3-1 2

Records certification ............................ .5.10. 8.02. 10-03 of examinations ................................... 1 1-1 1 of hardness tests .................................... 8.22 for radiographic examination ......................... . 1-1 0 retention of ........................................ 1-10

Reinforcement. Branch attachment weld .............................. .4.03. 7-08 clarification of terms .......................... .i&'. 1 1-1 0 limits of ..................................... .2.27. 9-04

(h) Cumulative index . B3 1.3 Interpretations Vols . 1- 15



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STD.ASME €332.3 I N T N O - 25-ENGL m 0759b70 0 5 8 4 0 5 3 7 4 8

Interpretation Subject No.

Repairs to welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Responsibility designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11 rights of owner’s inspection . . . . . . . . . . . . . . . . . . . . . . . . . .IO-O3

Safeguarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Code Coverage

Seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-07 stresses due to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17

Severe Cyclic Conditions cyclic loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12 large rapid temperature change ....................... ,8-09 spiral welded pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-O3

Simplified Flexibility Analysis ....................... .1-33

Standard Components manufacturers markings . . . . . . . . . . . . . . . . . . . . . . . . . .3-7, 8-02 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-05, 8-04, 8-07

Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 O superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-44

Stresses (see also

displacement stress range . . . . . . . . . . . . . . . . . . . . . . .7-04, 12-06

due to occasional loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16 due to pressure surges . . . . . . . . . . . . . . l-50 due to seismic loads. . . . . . . . . . . . . . . . .2-17 due to sustained loads . . . . . . . . . . . . . .15-15

Allowable Stresses)

due to cold spring . . . . . . . . . . .8-16

1-20, 1-50, 2-15, 2-24, 4-10, -03R (Vol. 7), 6-07, 7-05, 8-16

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . . l -34, 2-24, 6-03R (Vol. 7) basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . 2-7 for 816.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

. . . . . 1-46, 1-55, 1-71,

for unlisted components . . . . . . . . . . . . . . . . . . . .13-O5

. . . . . . . . . . . . l -6 , 5-15

5-01, 12-08, 12-17

for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-6, 12-1 1

Temperature design minimum temperature . . . . . . . . . . . 10-02, 14-08, 14-1 2,

large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09 limitations . . . . . . . . . . . . . . . . . . . . . . . .4-13, 5-14, 15-12, 15-25 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

15-11, 15-16


No.

Thermoplastic piping neat fusion joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-O8 solvent cemented joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lo-8 specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-06

Tubing joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13, 3-6

Thickness Allowances in stress calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20

Ultrasonic Examination in place of radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-05 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lo-1 7

Unlisted components . . . . . . . . . . 1-6, 1-51, 3-6, 4-05, 5-05, 8-7, 10-18,

materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Materials 10-1 1, 10-07, 12-09, 13-02, 13-03, 13-05

Valves Category M Fluid Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-35 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-07, 15-26 pressure build up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-O4 ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-05

Visual Examination internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1 O, 8-26, 13-1 6 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28, 10-03, 13-1 6

Washers, Use of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Weld bevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . definition examinati

14-1 4, 14-1 5, 15-02 fillet size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -74, 10-1 9

imperfections . . . . . . . . . . . . . . . . . . . . . . see Acceptance Criteria longitudinal . . . . . . . . . . . . . . . . . . . . . . 2-20, 3-11, 4-18

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-12 welding . . . . . . . . . . . . . . . . . . . . . . .13-01, 14-04

qualification of position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , l -66 reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-08, 1 1-08 repair . . . . . . . . . . . . . .2-18 socket . . . . . . . . . . . . . . . . . . . . . . . . . . .6-02, 6-05, 10-1 9, 15-08

for branch connections . . . 2-10, 4-03, 4-14, 8-37, 11-10

. . . . . . . . . . . . spacing of .7-O2

Welder Qualification by others.. . . . . . . . . . . . . . . . . . . . . . . . .15-19

Welding Procedure qualification of . . . . . . 1-1 2, 1-65, 1-66, 1-76, 4-1 7, 8-23, 8-29,

11-09, 14-05, 14-13 responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-07, 12-1 2 specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-21, 8-22

Cumulative index - B3 1.3 Interpretations Vols. 1 - 1 5



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ASME B31=3A 96 0759679 O574530 82T W



General Information

It has been agreed to publish interpretations issued by the B3 1 Committee concerning B3 1.3 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies to the Edition or Addenda stated in the interpretation, or if none is stated, to the Edition or Addenda in effect on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. These interpretations are not part of the Code or its Addenda.


ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not ?approve,? ?certify,? ?rate,? or ?endorse? any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the B31 Committee, refer to Appendix 2.



157



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ASME 831.3A 96 - 0759b70 0574533 766 U

B31.3

Subject

Fig . 323.2.2, Minimum Temperatures Without Impact Testing for Carbon Steel Materials . . . . . Maximum Allowable External Loads ................................................. Para . 300.2 Definitions ............................................................. Para . 302.2.4, Design Criteria Allowances for Pressure and Temperature Variations. and Para . 322.6.3(c), Pressure Relieving Devices ................................................. Para . 304.3.3 Reinforcement of Welded Branch Connections .............................. Para . 328.2 Welding Qualifications ................................................... Para . 328.2.2(g), Procedure Qualification by Others ..................................... Para . 328.4.3, Preparation for Welding Alignment ...................................... Para . 331.1.3(b) and Table 331.1.1, Heat Treatment Requirements ......................... Para . 341.3.3 Defective Components and Workmanship ..................................

Para . A304.1.1 (a). Pressure Design of Nonmetallic Piping Components .................... Para . K304.1.2 Straight Pipe Under Internal Pressure ................................... Table 323.2.2, Minimum Temperatures Without Impact Testing for Carbon Steel Materials . . . . Table 341.3.2A Acceptance Criteria for Welds

Table 341.3.2A Acceptance Criteria for Welds

Para . A304.1.1 (a). Pressure Design of Nonmetallic Piping Components ....................

Table 331.1.1, Postweld Heat Treatment ..............................................

Table 341.3.2A Acceptance Criteria for Welds ......................................... .........................................

........................

Inteniretation

14-08 14-06 14-03

14-09 14-10 14-13 14-05 14-04 14-01 14-14 14-17 14-18 14-1 1 14-12 14-16 14-02 14-07 14-15

File No . B31-95-010 B31-95-007 B31-95-002

B3 1-95-012 8 3 1-95-014 831-95-025 B31-95-005 8 3 1-95-003 B31-94-064 B31-95-032 B31-95-037 B31-95-038 B3 1-95-016 B31-95-018 B3 1-95-036 B31-95-001 B3 1-95-009 B31-95-034

159



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ASME 83L.3A 96 0759670 0574532 bT2 D

83 1.3 Interpretations No. 14 14-01


Subject: ASME B31.3b-1994 Addenda, Para. 331.1.3(b), and Table 331.1.1, Heat Treatment Requirements

Date Issued: June 22, 1995

File: B3 1-94-064

Question (1): In accordance with ASME B3 1.3-1993 Edition, Addenda b, does the portion of para. 331.1.3@) which states “the thickness through the weld in any plane” refer to the weld thickness?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1993 Edition, Addenda b, does the minimum material thickness stated in para. 331.1.3(b) refer to the requirements of Table 331.1.1?

Reply (2): Yes.

Question (3): In accordance with ASME B31.3-1993 Edition, Addenda b, can the BHN (Brinell Hardness Number) equivalent of tensile strength of material before PWHT be considered a minimum value?

Reply (3): The Code does not address BHN equivalent of tensile strength or minimum BHN.

161



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~~

ASME B31.3A 96 0757670 0574533 539

14-02 B 3 1.3 Interpretations No. 14


Subject: ASME B3 1.3b-1994 Addenda, Table 341.3.2A Acceptance Criteria for Welds


File: B3 1-95-001

Question (1): In accordance with ASME B31.3-1993 Edition, Addenda b, what does the notation “NA” for concave root surfaces for fillet welds in Table 341.3.2A mean?

Reply (1): This indicates that there is no acceptance criterion.

Question (2): In accordance with ASME B31.3-1993 Edition, Addenda b, does internal protrusion or suck up apply to fillet welds?

Reply (2): No; see Note (8) in Table 341.3.2A.

Question (3): Does ASME B31.3-1993 Edition, Addenda b, address the acceptance criteria for root surface concavity of fillet welds?

Reply (3): No.

Question (4): In accordance with ASME B31.3-1993 Edition, Addenda b, does melt-through of a pressure boundary with a fillet weld constitute a violation of the Code?

Reply (4): The Code does not address this subject.

162



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~

ASME B3L-3A Yb D 0759b70 0574534 475 D

83 1.3 Interpretations No. 14 14-03, 14-04


Subject: ASME B3 1.3b-1994 Addenda, Para. 300.2 Definitions


File: B3 1-95-002

Question (1): In accordance with ASME B31.3-1993 Edition, Addenda b, para. 300.2, is weld considered to be a piping component?

Reply (I): No.

Question (2): Does ASME B31.3-1993 Edition, Addenda b, specifically address the areas of general workmanship regarding squareness, levelness, and plumbness?

Reply (2): No; except as provided for in para. 335.1.

Question (3): In accordance with B31.3-1993 Edition, Addenda b, if there are additional requirements specified in the engineering design, does the Code require the manufacturer, fabricator, and erector to adhere to those requirements?

Reply (3): Yes, see paras. 300(b)(3) and 300(c)(5).

Question (4): Does ASME B31.3-1993 Edition, Addenda b, have requirements for the minimum lengths of pipe sections between welds?

Reply (4): No.


Subject: ASME B31.3b-1994 Addenda, Para. 328.4.3, Preparation for Welding Alignment


File: B3 1-95-003

Question: In accordance with ASME B31.3-1993 Edition, Addenda b, how much angular deflection can a section of piping contain after a circumferential butt weld is made?

Reply: The angular deflection shall not exceed what is permissible by para. 335.1, provided the requirements of para. 304.2.3 are met.

163



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ASME B3l1-3A 96 W 0759670 0574535 301 = 14-05.14-06.14-07 83 1.3 Interpretations No. 14


Subject:


ASME B3 1.3b- 1994 Addenda, Para. 328.2.2(g), Procedure Qualification by Others

File: B3 1-95-005

Question: In accordance with ASME B31.3-1993 Edition, Addenda b, is the use of AWS E-6013 welding electrode permissible under the provisions of para 328.2.2?

Reply: No; however, this welding material may be used if the provisions of paras. 328.1 and 328.2.1 are met.


Subject: ASME B3 1.3b-1994 Addenda, Maximum Allowable External Loads


File: B31-95-007

Question (1): Does ASME B31.3-1993 Edition, Addenda by provide design rules for establishing the magnitude of the maximum allowable external loads on flanged joints?

Reply (1): No.

Question (2): Does ASME B31.3-1993 Edition, Addenda b, allow the use of other design methods, such as contained in ASME B3 1.1 or ASME Boiler and Pressure Vessel Code Section III for establishing the maximum allowable external loads for flanged joints, considering the application and the appropriate allowable stress basis?

Reply (2): Yes. The designer is responsible for the design approach used.


Subject: ASME B31.3b-1994 Addenda, Table 341.3.2A Acceptance Criteria for Welds


File: B31-95-09

Question: Does ASME B31.3-1993 Edition, Addenda a, require the acceptance criteria of Table 34 1.3.2A for lack of fusion and/or incomplete penetration be applied to internal undercut?

Reply: No.

164



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ASME B31.3A 76 0757670 057453b 248

B3 1.3 Interpretations No. 14 14-08,14-09.14-10


Subject: ASME B3 1.3b-1994 Addenda, Fig. 323.2.2 Minimum Temperatures Without Impact Testing for Carbon Steel Materials


File: B3 1-95-010

Question: In accordance with ASME B3 1.3- 1993 Edition, Addenda b, if ASTM A 234, Grade WPB fittings are normalized or stress relieved or ASTM A 106, Grade B pipe is normalized, may they be used at temperatures below Curve B, Fig. 323.2.2 without impact testing?

Reply: No. The requirements of box B-3, Table 323.2.2 apply.


Subject: ASME B31.3-1993 Edition, Para 302.2.4, Design Criteria Allowances for Pressure and Temperature Variations, and Para. 322.6.3(c), Pressure Relieving Devices


File: B3 1-95-0 12

Question (1): In accordance with ASME B31.3-1993 Edition, are the provisions of para. 302.2.4 applicable for the initial design of piping systems?

Reply (1): Yes.

Question (2): In accordance with ASME B31.3-1993 Edition, para 322.6.3(c), when a pressure relieving device is set above the design pressure, what requirements limit the maximum allowance relieving pressure?

Reply (2): The greater of the pressure requirements of Section VIII, Division 1, or para. 302.2.4

Interpretation: 14-1 O

Subject: ASME B31.3-1993 Edition, Para. 304.3.3 Reinforcement of Welded Branch Connections


File: B3 1-95-014

Question: In accordance with ASME B31.3-1993 Edition, para. 304.3.3, is it permissible to multiply the required area replacement in Eq. (6) by the factor F from the ASME Section VIII, Division 1, 1992, Fig. UG-37?

Reply: No. See 304.3.3(f)(1).

165



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~~ ~~

ASME B31-3A 96 = 0759670 0574537 184 14-11, 14-12, 14-13


83 1.3 Interpretations No. 14

Subject: ASME B31.3a-1993 Addenda, Para. K304.1.2 Straight Pipe Under Internal Pressure


File: B31-95-016

Question: May Eq. (35a) in para. K304.1.2 of ASME B31.3a-1993 Addenda be modified to take into account external and internal mechanical (thread or groove depth), corrosion, and erosion ailow- ances separately?

Reply: No. See para. K304.1.l(b) for the definition of c.


Subject: ASME B31.3-1993 Edition, Table 323.2.2, Minimum Temperatures Without Impact Testing for Carbon Steel Materiais


File: B31-95-018

Question: Does ASME B31.3-1993 Edition require impact testing of ASTM A 403 WP304W, B16.9 fittings manufactured from A 312 welded TP304 pipe without use if weld metal deposits and used at design temperatures of -425°F or above.

Reply: No. See Table 323.2.2, Column A.


Subject: ASME B3 1.3b- 1994 Addenda, Para. 328.2 Welding Qualifications


File: B3 1-95-025

Question (1): In accordance with ASME B31.3-1993 Edition, Addenda b, when a proprietary integrally reinforced branch connection fitting is welded to the outside of run pipe, is the weld classified as a single vee full penetration butt weld with a cover fillet weid?

Reply (1): No, see para. 328.5.4(d).

Question (2): In accordance with ASME B31.3-1993 Edition, Addenda b, what pipe diameter would be used for the WPS, PQR, and WQR for NPS '/i and NPS Y4 proprietary integrally reinforced branch connection fittings?

Reply (2): All welding qualifications shall be in accordance with para. 328.2.

166



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83 1.3 Interpretations No. 1 4


14-14, 14-15, 14-16

Subject: ASME B31.3b-1994 Addenda, Para. 341.3.3 Defective Components and Workmanship


File: B3 1-95-032

Question: In accordance with ASME B31.3-1993 Edition, Addenda b, if a welder’s welds which are rejected are completely cut out and the joints are welded by a new welder, does para. 341.3.3 require these new welds to be examined?

Reply: Yes.


Subject:


ASME B3 1.3b-1994 Addenda, Table 341.3.2A Acceptance Criteria for Welds

File: B3 1-95-034

Question: In accordance with ASME B3 1.3-1993 Edition, Addenda b, when 100% radiographic examination and no further acceptance criteria are specified, is it required that the acceptance criteria for severe cyclic conditions as noted in Table 341.3.2A be applied to the examination?

Reply: No, see para. 341.3.1.


Subject: ASME B31.3-1990 Edition, Table 331.1.1, Postweld Heat Treatment


File: B31-95-036

Question: In accordance with ASME B31.3-1990 Edition, does A 335 P5 (5 Cr, Y2Mo) pipe require PWHT after welding?

Reply: Yes, per Table 33 1.1.1.

167



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~~ ~~

ASME B3l1-3A 96 0759670 0574539 T57 D

14-17, 1418 83 1.3 Interpretations No. 14


Subject: ASME B3 1.3-1993 Edition, Para. A304.1.1 (a), Pressure Design of Nonmetallic Piping Components


File: B3 1-95-037

Question: According to ASME B31.3-1993 Edition, do the requirements of para. A304.1.1 apply to the reduced sections of RTR pipe outside the socket of a socket joint?

Reply: Yes.


Subject: ASME B31.3-1993 Edition, Para A304.1.1 (a), Pressure Design of Nonmetallic Piping Components


File: B3 1-95-038

Question: According to ASME B31.3-1993 Edition, can the minimum thickness of RTR and RPM pipe be calculated using ASTM D 2992 procedure B HDS with a service factor of 0.5 (static HDBS)?

Reply: Yes, refer to A302.3.2(~)(2).

168



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ASME B31.3A 9b W 07.59670 0574540 779 W

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 631.3-1990 or later Editions, References in brackets



NO. -

Introduction . . . . . . . . . . . . . . . . . l -3 , 1-6, 1-7, 13-04 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10, 8-17 300(b) . . . . . . . . . . . .l-26, 1-32, 4-08, 5-03, 8-09, 10-11, 13-14 300W . . . . . . .3-2, 3-4, 4-10, 6-03R (Vol. 7), 7-05, 8-30, 13-02

300.1 . . . . . . . . . . . . . . . . . 300.1.1

. . . . . . . . . 1-3, 1-6, 1-7 7-1 O, 8-1 7, 9-06, 12-20

. . . . . . . . .1-47, 1-52, 2-26, 3-1, 4-19, 6-01, 8-01, 9-02 , 1-19, 2-26, 7-10, 8-17

300.1.3 [300.1.4] . . . . . . . . . . . . . . . . . l -8 , 1-16, 1-19, 1-26, 3-2 300.1.3(d) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lo-O5 300.2

Category D Fluid Service . . . . . . . . . . . . . . . . .4-13, 5-03, 6-01 Category M Fluid Service . . . . . .1-40, 1-73, 6-01, 8-09, 9-02 notch-sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -2 2

. . . . . . . . . . . . . .2-3

. . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

. . . . . . . . . . . . . . . . . . 3-4

302.2 . . . . . . . . . . . . . . . . . . 302.2.4 [302.2.3] ..................... 1-3, 1-32, 2-14, 3-4,

4-11, 7-01, 7-04, 8-04, 14-09 . . . . . . . . . . . . . . . . . . . . . . . . .13-15

18, 1-38, 2-16, 3-13, 8-25, 11-05 ........................ 2-20 . . . . . . . . .l-42, 1-78, 2-20, 3-1 1

1-20, 1-50, 2-14, 2-15, 2-24, 3-4, , 4-12, 6-03R (Vol. 7), 6-07, 7-04,

7-05, 8-16 302.3.6 ........................... .l-50, 2-15, 2-16, 2-17 302.4. . . . . . . . . . . 303 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-05 304.1.1 . . . . . . . . . 1-42, 1-54, 1-70, 13-07

1-68, 1-70, 2-1 1, 10-20 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fig. 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . 1-22 304.3. 304.3.2 .......................

....................... .l-21, 1-46, 5-01, 6-09


No. - 304.3.3 . . . . . . . . . . . 4-03, 7-02, 8-06,

7, 11-10, 12-05, 14-10

304.5 .................................. .3-4, 9-07, 10-14 304.5.1 . . . . .

........................

..................... 1-16

306.4 . . . . . . . .

31 1.2.4 . . . . . . . .

312 . . . . . . . . . . . . . . . .

. . . . . .8-33, 11-16

..................... 1-17 318 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

319.2.3 . . . . . . . . .7-04, 7-05, 12-06

1-6, 1-7, 1-55, 2-24, 5-1 5, 13-05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33, 13-14

319.4.4 . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . 1-49 ..................... 10-10, 12-18 .1-32, 2-21, 2-29, 7-01, 12-04, 14-09

. . . 1-11, 1-15, 1-48, 2-1, 6-06, 8-07, 8-1 9, 11 -03

Fig. 323.2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-O8

Cumulative index - 631.3 Interpretations Vols. 1-14 (a)



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ASME B31.3A 96 0759670 135745YL 605


No . - Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . . . . 1-12, 1.48, 1.65. 1.76. 2.19. 3.8. 4.01. 4.15. 14-12

323.2.4 ........................................... 6-06 323.3 . . . . . ..................... 1.76. 5-13 323.3.2 . . . ......................... 11-12 Table 323.3.1

[Table 323.2.21 . . . . . . . . . 1.12. 1.76. 4.17. 5.19. 5.21. 8.29. 10.2. 11-12

323.3.4 ........................................... 8-30 .................................... 2-9

323.4.2 .................................... 10.01. 10-19 ........................... 5-14 . . . . . . . .1.11. 1.51. 2.3. 8.07. 8-34

................................... 7.02. 12-12 .......................... 12-07

328.2 [327.5] ......................... .1.66. 11.09. 14-13 328.2.1 [327.5.1, 327.5.21 . . . . . . . . . . . . . . . . .1.76. 4.17. 8-29

328.4.2 and Fig . 328.4.2 . . . . . . . .

. . . . . . . . . . . . . . . . . . . .8.28. 9-08

8-2 7 . . 1.59. 1.74. 2.10. 4.03. 328.5.4 [327.4.4]

7-08 328.6. . . . . . . . .

.................................... 8-23

...................... 8-12

Table 331.1.1 [Table 331.3.11 . . . . . . . . . 1.69. 2.2. 5.06. 8.24. 9.03. 12.14.

14-16 331.1.2 ........................................... 8-05 331.1.3 [331.3.6] . . . . . . . . . . . . . . 1.39. 1.59. 4.06. 5.06. 9.03.

11.06. 14-01 331.1.4 [331.1.2] ................................... 5.08 331.1.6 [331.3.4] .......................... 331.1.7 [331.3.2] .......................... 331.2.2 [331.1.1]. . . . . . . . . . . . . . . . . . . . 331.3.4 ........................................... 8-05 331.3.7 ..................... 332.1 .......................

332.4 [329.3, 330.21 . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 332.4.2 . . . . . . . . . . . . . . . ........................ 11-03 335.2 .............................................. 2-5

............................... 1-26

332.2 [329.1] . . . . . . . . . . . . . . . . . .1.23. 1.53. 4.02. 8-20

340.3 [336.3] ............................... .1.10. 10-03 340.4 (336.21 ...................................... 1-31 341 ............................................. 10-16 341.2 [336.1.1, 336.1.31 . . . . . . . .1.10. 1.26. 1.27. 2.28. 10-03 341.3.1 [336.5] ............................... .1.64. 2-4 341.3.2 ........................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 ..................... .5.09. 13-16

(b)


No . - Table 341.3.2 ........................ .14.02, 14.07. 14-15

. . . . 1.1. 1.9. 1.14, 1.41, 2.8. 5.04.

[Table 341.3.2Al . . . . 8.32. 8.38. 9.04. 11.08. 11.14. 12.22. 13-1 6

341.3.3 ..................... .. .1 4.14 341.3.4 [336.5, 336.5.41 . . . . . . . .5. 3.14.

10.09. 10.12. 11.02. 11.04. 13-12 341.4 [336.5] . . . . . . . . . . . . . . . . .1.24. 1.45. 3.12. 5.20. 11-01

. . . 1.10. 1.26. 1.27. 1.60. 2.12. 2.28. 3.7. 3-1 2. 4-1 2. 5-1 O.

8.02. 8-1 O. 8.26. 10.03. 10-1 7. 11.11. 11.14. 11-15

. . . . . . . . . . . . . . . . . . 8-38 . . . . . . . . . . . . . . . . 8.10

341.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38 . . . . . . . . . . . . 1.5. 3-12 . . . . . . . . . . . . . . . . 2-28

. 5.16. 5.17. 5.18. 5.20. 6.04. 7.06.

341.4.1 [336.5.1] . . . . . .

343 [336.4.1] ...................................... 2.28 344 [336.4] ....................................... 5.09 344.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-12

2.28. 8-1 O. 8.26. 11-1 1 . . . . . . 1-1 O. 1.60. 2-1 2

. . . . . . . . . . . . . . .1 0.17

. . . . .2.28. 3-1 4. 12-01

. . . . . . . . . . . . . . . 11-11 . . . . . .1.2. 1.72. 2.31. 3.3. 8-31

4.04. 6.08. 8-1 5. 12-2 1 ........................ 8-31

.2.6. 3-1 O. 5.02. 12-03

. . . . . . . . . . . . . . . . 8.04 345.4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-19 345.4.2 [337.4.1] . . . .1.35. 1.61. 1.63. 2- 345.4.3 [337.4.2] .....................

. . . . . . . . . . .1.35. 1-4 345.5.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

................................. 12-02 345.7 [337.5.2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36 345.8 [337.6] ................................ .1.25. 3-10

. . . . . 4.09. 5.07. 6.08. 8.15. 10.15. 12.01. 12-21

A304 ............................. A304.1.1 .......................... A304.5.1 .......................................... 1-67 A304.7.2 ........................................ .1 3.08 A305 ............................................ 11-17 A314 ............................................. 8-33 A323.4.2,. ................................ .10.06. 11-18 A327.2.4 .......................................... 7-09 A328.2(a) ........................................ .1 0.8 A328.2.1 ......................... A328.5 .......................... K304.1.2 . . . . . . . . . . . . . . . . . .11.21. 14-11 K315 ............................................. 7-07 K322.3 . . . . . . . . . . . . . . . . . . . 7-07 Fig . K328.5.4 ...................................... 8.37 M305.1 ......................................... .l 2.15 M307.2 ...................... M322.3 ...................... M323.1.3 .................... . . . . . . . . . . . . 3.7

. . . . . . . . . . .

Cumulative Index . 631.3 interpretations Vols . 1-1 4



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ASME B3L-3A 96 0759670 8574542 541

Interpretation No . Code Reference -

M326 ............................................ 2-13 . . . . . . . . . . . . . . . . . 3-6 . . . . . . . . . . .l-24. 1-45

M335.4 [M335.5, M335.61 . . . . . . . M341.4 [M336.5] . . . . . . . . . . . . M341.4.1 [M336.5.1] . . . . . . . . . . . . . . . . . . . . .2-28, 3-7 M345.1 ..................... . . . . . . . . . . . . . . . . 6-08 MA306.5 . . . . . . . ............................... 9-02

.............................. 9-02 MA323.4.2 . . . . . . .............................. 8-35 Appendix A Notes (No equivalent) [U 411 .............................. 2-20

.............................. 4-18

.............................. 1-77

.............................. 1-58 Appendix A

Table A-1 [Table 11 . . . . . . . . . . 1-13, 1-18, 1-29, 1-38, 1-48, 1-77, 2-1, 3-8, 3-9, 3-13, 4-12,

4-13, 6-01, 6-06, 7-03, 8-11, , 8-34, 8-36, 11-13, 12-09

Table A-1B [Table i] . . . . . .1-78, 2-20, 4-1 8, 7-03 Appendix 0 . . . . . . . . . . . . 1-6, 1-7, 1-34, 1-46, 1-55,

1-56, 1-71, 2-7, 2-24, 4-1 6, 5-01, 5-15, 6-06, 12-08, 12-11, 12-17, 13-05

Appendix E [Appendix K I . . . .1-44, 5-10 Appendix F (F323.21 ................................ 1-29 Appendix G . . . . . . . ......................... Appendix H ................................ .8-06, 1 1-10 Appendix J ........................ .1-28, 1-54, 1-75, 5-04 Appendix M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-01, 8-09 Appendix X, X3.1.3 .............. . . . . . . . .1 2-23 Appendix X, X3.2.2 . . . . . . . . . . . . . . 13-09 Case 137 . . . . . . . . . .................... 3-1 Case 141 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51




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ASME B3L.3A 96 0759670 O574543 488

Subiect

SUBJECT INDEX

Interpretation - No. Subject

Acceptance Criteria pressure tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2 weld . . . . . . . . . . . . . . . . . 1-1, 1-9, 1-14, 1-41, 2-8, 5-09, 5-13,

5-17, 5-18, 5-20, 6-04, 7-06, 8-32, 12-22, 13-16, 14-02, 14-07

Allowable loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-O6

Allowable Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12 bases for .................... .l-18, 3-13, 8-11, 8-25, 10-13 for ASTM A 312 .................................... 1-29 for ASTM A351 ............................. for ASTM A 387 .............................

Interpretation No. -

... . . .11-13 . . . . . . ,8-25 Buckles.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bends corrugated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . miter ................................. reduction of outside diameter . . . . . . . . . . . . .

Bonding Qualification Test hot gas welded ......................... minimum burst pressure . . . . . . . . . . . . . . . . . .

solvent cement ......................... procedure specifications for plastic piping . . .

Branch Connections extruded outlets ......................... .l-37, 2-27, 6-09 flexibility analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .%O1 integrally reinforced fitting ..................... .4-05, 1 1-1 O projection into run pipe ........................ .8-28, 9-03 reinforcement . . . . . . . . . . . . . . .8-06, 8-37, 12-05, 12-13, 14-10 weld requirements . .2-1 O, 4-03, 4-1 4, 7-02, 7-08, 10-04, 13-1 1

Brazed joints for flammable service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i -1 7

for ASTM A 570 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 for ASTM A 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 for ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -48 for ASTM B 464 ................................... .8-11 for austenitic stainless steels .......................... .3-13

Alterations of Piping ............................. .13-O4

Alternative Tests .......................... .see Leak Tests

Authorized Inspector . . . . . . . . . . . . . . . . see Owner's inspector

Bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-O9

Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-02, 8-03

. . . . . . . . . . . . l -23

. . see Miter Bends

. . . . . . . . . . . .8-20

. . . . . . . . . . . .8-14

. . . . . . .7-09, 8-1 4

. . . . . . . . . . .lo-O8

. . . . . . . . . . . ,8-14

Bonds heat fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-14 hot gas welded .................................... .8-14 test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-O9

Bolting Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15

. l-23, 1-53

Cast Irons specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lo-o1

Category D Fluid Service alternative pressure test for . . . . . . . . . . . . . . . . . . . . . . . . . . . l -36 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . radiographic examination . . . . . . . . . . . . . . . . . . . 8-38

Category M Fluid Service clarification of term . . . . . . . . . . . . . . 1-73, 9-02

8-35 leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 liquid oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09

. . .8-35, 9-02, 12-15 tubing size limitations 2-1 3

. . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . "very small quantity" . . . 1-40

Code Coverage 631.3 versus 631.4 . . . . . . . . l -47, 7-1.0 general hydrocarbon service . . . . . . . . . . . . . . . . . . . . . . . . . .6-O1 in-line sensing devices . . . new and replacement piping . . . . . . . . . . . . . . . . . . . .5-22 12-21

. . . . . . . . . . . . . . . . . . . .4-19 radioactive fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . synfuel plant piping tobacco plant piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Components (see also Fittings, Flanges, Standard

certification ........................ . l-26, 3-7, 5-10, 13-10 design conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 fabricated or flared laps . . . . . . . . . . . . . . . . . . . . . . .l l-03, 12-1 6 in-line sensing devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-O1 referenced standards .......................... .1-44, 5-1 O

components, Unlisted and Valves)

Cumulative index - 631.3 Interpretations Vols. 1-14 (el



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

~ ~~

ASME B 3 L . 3 A 96 0759670 05745bi4 314

Interpretation No . -

Compressors internal piping ....................................... i -8

Corrugated Bends ................................. . l-23

Cyclic loading .................................... 5-12


additional design considerations ...................... 12.13 conditions .......................................... 2-3 for stainless bellows ................................ 12.23 Lame theory ....................................... 1.57 minimum temperature .............................. 10.02

Displacement Stress .................... .2.14, 2.24, 12-06

Design)


Empty System transportation ................................. i . . . . 9.06

Examination extent of .............................. .1.24. 5.18. 11-01

............................ 3.14. 11-15

. . . . . . . . . . . see Liquid Pentrant Examination

. . . . . . . . . . . . . . .see Progressive Examination

. . . . . . . . . . . . . see Radiographic Examination random . . . . . . . . . . . . . . . . . . . . . . . 1.27. 1.45. 1.62. 2.12.

records . . . . . . . ........................... 11-11 required .................... .1.24. 1.60. 6.04. 1 1.14. 1 1-1 5 severe cyclic conditions . . . . . . . . . . . . . . . . . . . 10.17. 11-14 spot ...................... .................... 1-62 visual ..................... . . . . . see visual examination ultrasonic ....................... see ultrasonic examination

2.32. 4.12. 11-15

Exclusions for compressors and internai piping ..................... 1.8 for interconnecting piping ............................ 1.1 9 listed in scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5

Expansion Joints ...................... .1.16. 12.23. 13-09

Extruded Outlet pressure design of ............................. . l -2 1. 1 -70 tees considered as .................................. 1.55


Fillet Weld internal. slip-on flange ............................... 8.27 pressure containing .................................. 8.13 size .............................................. 1-74 use ............................................... 10-4

Fittings

conforming to two grades ............................ 8.18 flared. flareless. or

compression types .......................... .3.6. 12-1 6

616.9 ........................................ 1.7. 5-01

MSS SP-75 ........................................ 1-11


No . - Flammable Service ................................. 1.17

Flanges assembly ........................................... 2.5 design ................................... .1.67, 3.4. 9-7 general . .......................................... 9.1 0 long welding neck .................................. 4.05 slip-on ...................................... .5.12. 8-27 use of aluminum .................................... 1.51 use of raised and flat face metallic ..................... 9.07

Flexibility Analysis branch connections ................................. 9.01 exemptions from .................................... 1.33 qualification ............................... .13.05, 13-1 4


diameters ........................................ 1.56 for a tee ............................... .1.55. 1.56. 5-01 for components not listed

in Appendix D ............................. .1.55. 2-24

Flexibility Factors basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 for B16.9 tees .......................... .l-7. 12.08. 12-17 for fabricated intersections . . . . . . . . . . . . . . . . . . . l -6, 4-1 6. 5-1 5 for pressure piping components ...................... 13.05 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6

Fluid Service general hydrocarbon ................................ 6.0 1 requirements. metallic . . . . . . . . . . . . . . . . . .11.16. 12-1 5, 12-1 6 requirements. nonmetallic .................... .l 1.1 7. 1 1-1 8 responsibility for

categorizing ................................ .4-08. 8-09


onset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Hardness limitations on ....................................... 2-2 records ........................................... 8-22

Heat Fusion Joints ................................ 13.08

Heat Treatment cooling rate ....................................... . l -69 for austenitic stainless steel ........................... 1.65 for bending and forming .............................. 2.2 for flared laps ..................................... 1 1-03 for valve parts ...................................... 8.12 governing thickness . . . . . . . . . . . . l-39, 1.59, 4.06, 5.06. 1 1-06 heating rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-69 local ....................................... .5.08, 8-05 monitoring ................................... .5.08, 8-05 requirements . . . . . . . 8.08, 8.21. 8.23, 8.24, 9.03. 9.05. 12.14.

SP-1 through SP-5 .................................. 8.24 when radiography is

required .................................... .1.64. 2-4

14.01, 14-16

(f) Cumulative Index . 631.3 Interpretations Vols . 1-14



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

A S I E B31.3A 9 b 0759b7Q 0574545 250


No . -

Hydrostatic Tests ......................... .see Leak Tests

impact Tests absorbed energy data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 alternative methods ................................. 8.30 base metal .................................. .4.01, 1 1-1 2 exclusions from ......................... .1.76, 5.14, 8-30 heat treatment required .............................. 5.19 in qualifying procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.29 of aluminum filler metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.19 of austenitic stainless steel ........................... . l-65 of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15 of the heat affected zone . . . . . . . . . . . . . . . . of weldments ...................... .1.12, 1.65, 1.76, 5-21 temperature limitation . . . . . . . . . . . . . . . . . . . .5.14, 8.30, 14-12

imperfections (see also Acceptance Criteria) concave root surface ........................... .1.1. 6-04 determination of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32 lack of fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.09 porosity ............................ . l -9, 5-1 3, 5-1 6. 5-20 slag inclusion ...................................... 5-20 tungsten inclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-9, 5-17 undercutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 4, 2-8, 6-04

Installed Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-30

Instrument Piping ............................ .7.07, 6-01

Internal Piping. Equipment .......................... . l-8

joint Factors for ASTM A 234.

for branch connections .............................. 8.06 for circumferential welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-42 for longitudinal and spiral

welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.78. 3-1 1, 8-06

ASTM A 31 2. ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . 2.20

joints circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6, 3-1 O instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13 threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16

. . . . . . . 1.6

leak Tests acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2

4.09, 5.07, 6.08, 8.15, 12.01, 12-21 n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31 . . . . . . 1.2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.23. 4-04 . . . . . . . . . . . . . . . . . 1-2 . . . . . . . . . . . . . . . . 1-72

systems . . . . . . . . . . . . . . . . . . . . . . 1-4, 5-02, 5-22, 8-15

for system designed for

minor repairs and additions of discharge piping . . . . . . . of newly constructed

Interpretation N o . -

of piping and vessel ................................ . l -63 of piping connecting

equipment ........................................ 3-3 of replacement piping ........................ .5.22, 12-21 painting before test ........................ .2.6, 3-1 O. 5-23 personnel qualification . .......................... 8-31 pneumatic test . . . . . . . . . . . . . 11.07. 11.19. 12.02. 13-06 preparation for . . . . . . . . . . . . .2.6. 3.10. 5.02. 5.23. 12-03 reduced pressure

(hydrostatic test) ...................... . l-61, 2.23. 13-1 3 requirements ................................ .8.15. 13-1 3 sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 temperature correction for ...................... . l-35, 1-43

..................................... 12-19 test pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.04

lethal Substance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-73

limitations on imperfections ......................... see Imperfections on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 on tubing size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13, 3-6

liquid Penetrant Examination requirements ..................................... .1 1-14

low Temperature Requirements . . . . . . . . . . . . . . . . . . . . . . . . . see Impact Tests

Materials

ASTM A 234 . . . . . . . . . . . . . . . 2.20 ASTM A 312 . . . . . l-29, 1.77, 2-20

ASTM A 387 ... . . . . . . . . . . . . . . . 8.25

ASTM A 487 ... ASTM A 537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ASTM A 570 . . . . . . . . . . . . 1.38

ASTM A 633 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

austenitic stainless steels . . . . . . . . . . . . . . . . . . . 3.13 . . . . . . . . . . . . . . . 11-05

conforming to two grades ...................... .8.18, 8-34 notch sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . reidentification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1 9 toughness requirements . . . . . . . . . . . unlisted material . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l l-05, 1 1-20

Miter Bends pressure design of . . . . . . . . . . . . 1.22. 5-11


explanation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-33




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

ASME B31.3A Yb 0759670 057454b 197 = Interpretation - No .

Nomenclature d ................................................ 1.54 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 I" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75 T, .......................................... 5.04. 5-16 -

Nonmetallic Piping fluid service requirements ..................... 1 1-1 7. 1 1-1 8 in Category M Fluid Service .......................... 8.35 joint requirements ............................. .7.09. 8-1 4 pressure design ............................. .14.17. 14-1 8


Occasional Variations (pressure/temperature allowances) . . . . . . . . l -3, 2-1 4. 4-1 1

loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.50. 2.15. 2.16. 2-17

Owner responsibilities ........................... .1.26. 2.30. 5-22

Owner's Inspector qualifications of .................................... i -31 responsibilities of ................................... 1-26

Pipe alterations of existing pipe .......................... .l 3.04 elbowless ......................................... 8.03 in corroded condition ............................... 2.1 5 made from plate .............................. .1.48. 8-36 of noncircular cross section ............................ 3.2 pressure design ............................. .13.07. 14-09 pressure testing ..................................... 9.09 spiral welded ...................................... 7.03 straight. under internal pressure . . . . . . . . . . .10.20. 1 1.21. 14-1 1

Pipe Supports configurations ...................................... 6.07 longitudinal stress effects ............................. 7.05 use of plastic ....................................... 1.49

PI as t i c

pipe supports ...................................... 1-49 lined pipe . use of screwed flanges . . . . . . . . . . . . . I . . . . . 8.33


Positions qualification of welding ............................. . l -66



Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ........................... . l-68 of extruded headers ........................... .1.21. 1-70 of flanges and blanks ........................ .10.14. 13-1 5 of miter bends .................................... . l -21


No . - of nonmetallic piping components . . . . . . . . . . . . . .14.17. 14-1 8 Of pipe ............................ 1.42, 1.54. 1.57. 1.68.

1.70. 2.11. 11.21. 13-07 of unlisted components . . . . . . . . . . . . . . . . .13.02. 13.03. 13-05 of valves ................................... .8.0 4. 13-1 5

Pressure Rating valve ............................................. 8.04 variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Pressure Relief Devices acceptable devices ............................ .2.21. 2-29 and test pressure . . . . . . . . . . . . . . . 11.07. 11-1 9. 12.04. 14-09 setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.32. 7.01. 12-04 stop valves ................................. 10.1 O. 12-1 8



Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Test


11.02. 11.04. 13-12

Published Specification ............................ . 1-1 5

Radiographic Examination 100% ............................................ 5-09 as supplementary examination ......................... 8.38 random radiography . . . . . . . . . . . . . . . . . 1.27. 1.45. 1.62. 2-1 2.

records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10 requirements .................... .6.04. 1 1.01. 1 1 .05. 12-03 selection of welds for

examination ...................................... 2-25 spot radiography .............................. . l-62, 3-12 when PWHT is required ........................ .1.64, 2-4

2.32. 3-12

Records certification ............................. 5.1 O. 8.02. 10-03 of examinations .................................. .i 1.11 of hardness tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22 for radiographic examination ......................... . l-10 retention of ....................................... . 1-1 0

Reinforcement. Branch attachment weld .............................. .4.03. 7-08 clarification of terms. ......................... .1-37. 11-10 limits of ..................................... .2-27. 9-04

Repairs to welds .......................................... 2-18

Responsibility designer ......................................... .1 0.11 rights of owner's inspection ......................... .1 0.03

Safeguarding ...................................... 5.12

Scope ............................... .see Code Coverage

íh) Cumulative Index . 831.3 Interpretations Vols . 1-1 4



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

ASME B3L*3A Yb W 0759b70 0574547 023


Seismic Loads ..................................... 4-07 stresses due to ..................................... 2.17

Severe Cyclic Conditions cyclic loading ...................................... 5.12 large rapid temperature change ........................ 8.09 spiral welded pipe .................................. 7.03

Simplified Flexibility Analysis ....................... .l. 33

Standard Components manufacturers markings .......................... .3-7, 8-02 valves ................................. .5.05, 8.04. 8-07

Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10 superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44

Stresses (see also

displacement stress range ...................... .7.04. 12-06 due to cold spring .................................. 8.16 due to occasional loads .............................. 2.16 due to pressure surges ............................... 1.50 due to seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17 due to thermal gradients .............................. 3.4 longitudinal . . . . . . . . . . . . . . . . . . . 1.20, 1-50. 2-1 5. 2.24. 4-1 O.

Allowable Stresses)

4-1 2. 6-03R (Vol . 7). 6.07. 7.05. 8-1 6

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . .1.34. 2.24. 6-03R (Vol . 7) basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 for 616.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 for fabricated intersections ....................... .1.6, 5-1 5 for tees ................................ 1.46, 1.55, 1.71,

for unlisted components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.05 for welded elbows ............................ . l-6, 12-1 1

5.01, 12.08, 12-1 7

Temperature design minimum temperature . . . . . . . . . . . .10.02. 14.08. 14-1 2 large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.09 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.13. 5-1 4 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Thermoplastic piping neat fusion joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . solvent cemented joints ............................. specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-08

0-06 10-8


No . - Tubing joints ............................................. 7.07 limitations .................................... .2.13. 3-6

Thickness Allowances in stress calculations ................................. 1.20

Ultrasonic Examination in place of radiography ............................. 1 1-05 requirements ..................................... .l 0.1 7

Unlisted components . . . . . . . . . . 1.6. 1.51. 3.6. 4.05. 5.05. 8.7. 10.18.

materials .................................. .see Materials 10-1 1. 10.07. 12.09. 13.02. 13.03. 13-05

Valves Category M Fluid Service ............................. 8.35 materials .......................................... 8.07 pressure build up ................................... 8.04 ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-05

Visual Examination internal ................................ 8.1 O. 8.26. 13-1 6 requirements .......................... .2.28. 10.03. 13-1 6

Washers. Use of .................................... 2.5

Weld bevels . . . . . . . . . . . . . . . . . . . definition . . . . . . . . . . . . . . . . . examination of welds . . . . . . . . . . . . 10.15. 11.01. 11.14. 13.16.

fillet size ................................... .1.74. 10-19 for branch connections . . . . . . . . .2.10. 4-03. 4.14. 8.37. 11-10 imperfections ...................... see Acceptance Criteria longitudinal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.20. 3-1 1. 4-18 of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i 2.12 preparation for welding ...................... .13.01. 14-04 qualification of position ............................. . l -66 reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.08. 11-08 repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

......................... .6.02. 6.05. 10-1 9 spacing of ......................................... 7.02

14.14. 14-15

Welding Procedure qualification of . . . . . . 1-1 2. 1.65. 1.66. 1.76. 4-1 7. 8.23. 8.29.

responsibility ............................... .12.07. 12-1 2 specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.21. 8-22

11.09. 14.05. 14-13

Cumulative Index . B31.3 Interpretations Vols . 1- 14



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~~ ~

ASME B31 .3*1NT NO.*:L3 ** 0759670 0565952 003

ASME B31.3



General information




For detailed instructions on preparaion of technical inquiries to the B31 Committee, refer to Appendix Z.



147



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~

ASME B3Lm3*INT NO.*L3 Y * m 0759670 0565953 T4T m

B31.3

Subject Interpretation Alteration of Existing Piping and Hot Tapping ........................................ Certification of a Listed Material to Another Listed Material Specification ............... Paras . 301.2.1 and 302.2.5, Design Pressure ........................................... Para . 304.1.l(a), Pressure Design of Straight Pipe ..................................... Para 304.7.2, Pressure Design of Unlisted Components and Elements ....................

of Unlisted Components and Elements ............................................. Paras . 304.7.2 and 319.3.6, Pressure Design and Flexibility Factors ....................... Para 319.4.1, Flexibiliíy Analysis ..................................................... Para . 328.4, Preparation for Welding ................................................. Para 328.5.4, Welded Branch Connections ............................................ Chapter VI Inspection. Examination. and Testing ...................................... Para . 34 1.3.4( e). Progressive Examinat ion ............................................. Para . 345.4.2(a), Hydrostatic Test Requirements ....................................... Para . 345.5, Pneumatic Testing ...................................................... Para . A328.5.4, Heat Fusion Joints in Thermoplastic Piping ............................. Appendix X. Para . X3.2.2, Metallic Bellows Expansion Joints ...........................

13-04 13-10 13-15 13-07 13-02

Paras . 304.7.2 and 304.7.2(d), Pressure Design 13-03 13-05 13-14 13-01 13-11 13-16 13-12 13-13 13-06 13-08 13-09

File No . B31-94-017 B31-94-034 B31-94-042 B31-94-028 B31-94-015

B31-94-016 B31-94-018 B31-94-041 B31-93-059 B31-94-037 B31-94-059 B31-94-039 B31-94-040 B31-94-020 B31-94-029 B31-94-03 1

149



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ASME B3Lm3*INT N O - * I I ~ ** = 0759670 0565954 986 B31.3 Interpretations No. 13 13-01, 13-02, 13-03


Subject: ASME B31.3-1990 Edition, Para. 328.4, Preparation for Welding


File: B31-93-059

Question: In accordance with ASME B31.3-1990 Edition, Addenda a, does the Code require that all transitional tapers be filled with weld metal to obtain a consistent outside diameter when welding together two weld end components that are manufactured to include all of the following:

(1) a weld bevel to nominal wall thickness; (2) an actual outside diameter greater than the nominal outside diameter; (3) a taper transition from the actual outside diameter to the nominal outside diameter weld

bevel per ASME B16.25, Fig. 1.

Reply: No, the weld must have at least the same nominal wall thickness as the thinner of the two components.

Interpretation : 13-02

Subject: ASME B31.3-1993 Edition, Para. 304.7.2, Pressure Design of Unlisted Components and Elements


File: B31-94-015

Question: In accordance with ASME B31.3-1993 Edition, para. 304.7.2, may the maximum allowable pressure of an unlisted component be greater than the manufacturer’s rating?

Reply: Yes, see para. 300(c)(2).


Subject: ASME B31.3-1993 Edition, Paras. 304.7.2 and 304.7.2(d), Pressure Design of Un- listed Components and Elements


File: B31-94-016

Question: In accordance with ASME B31.3-1993 Edition, is a proof pressure test, in accordance with para. 304.7.2(c), required to qualifj a flange design not in accordance with a listed standard if the design meets the requirements of para. 304.7.2(d) as well as the introductory requirements of para. 304.7.2?

Reply: No.

151



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ASME B 3 1 * 3 * 1 N T N O * * 1 3 ** D 0759670 0565955 A12

13-04, 13-05, 13-06 B31.3 Interpretations No. 13


Subject: ASME B31.3-1993 Edition, Alterations of Existing Piping and Hot Tapping


File: B31-94-017

Question: Does ASME B31.3-1993 Edition and Addenda a apply to alterations of existing piping, including tie-in branch connections, e.g., hot taps?

Reply: No.


Subject: ASME B31.3-1993 Edition, Para. 304.7.2, Pressure Design of Unlisted Components and Elements, and Para. 319.3.6 Flexibility and Stress Intensification Factors


File: B3 1-94-018

Question (1): In accordance with ASME B31.3-1993 Edition, may a pressure containing piping component, not manufactured in accordance with a listed standard, and for which the rules in para. 304 do not apply, be qualified in accordance with para. 304.7.2?

Reply (1): Yes.

Question (2): In accordance with para. 319.3.6, may stress intensification factors for pressure containing piping components, not manufactured in accordance with a listed standard listed in Appendix D, be established by fatigue testing?

Reply (2): Yes.


Subject: ASME B31.3-1993 Edition, Para. 345.5, Pneumatic Testing


File: B3 1-94-020

Question: In accordance with ASME B31.3-1993 Edition and Addenda a, is it allowable to pneumatically test above 110% of design pressure?

Reply: No, unless otherwise specified in the engineering design.

152



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~ ~

ASME B31 .3*1NT NO.aL3 f t W 0759670 0565956 759



13-07, 13-08

Subject: ASME B31.3-1990 Edition, Para. 304.1.l(a), Pressure Design of Straight Pipe


File: B3 1-94-028

Question: In accordance with ASME B31.3-1990 Edition, may the minimum pipe wall thickness determined by measurement be used to satisfy the requirements of para. 304.1.l(a)?

Reply: Yes.


Subject: ASME B31.3-1993 Edition, Para. A328.5.4, Heat Fusion Joints in Thermoplastic Piping


File: B31-94-029

Question: Does ASME B31.3-1993 Edition, para. A328.5.4, apply to electrofusion bonding of polyolefin pipe and fittings?

Reply: No. Electrofusion joints are not listed; see para. A304.7.2.

153



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13-09, 13-10 B31.3 Interpretations No. 13


Subject: ASME B31.3-1987 Edition, Appendix X, Para. X3.2.2, Metallic Bellows Expansion Joints


File: B3 1-94-03 1

Question (1): In accordance with ASME B31.3-i987 Edition, para. X3.2.2, is it required to examine inaccessible surfaces of the bellows longitudinal seam weld after forming using liquid penetrant?

Reply (1): No.

Question (2): Is a dye penetrant leak test (putting dye penetrant on the inside surface and developer on the weld outside surface) an acceptable alternative to liquid penetrant examination of the inside surface of bellows longitudinal seam welds?

Reply (2): No.

Question (3): Are the rules in ASME Section VIII, Division 1, Appendix 26, applicable to bellows in ASME €331.3 piping systems?

Reply (3): No.


Subject: ASME B31.3-1993 Edition, Certification of a Listed Material to Another Listed Material Specification.


File: B31-94-034

Question: Is it permissible under the requirements of ASME B31.3-1993 Edition for an organization to recertify a listed material to another listed material specification?

Reply: B31.3 does not establish rules for materials certification other than the requirements of the materials specifications.

154



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A S I E B3L13*INT N O . * 1 3 ** m O759670 0565958 5 2 1 m



Subject: ASME B31.3-1993 Edition, Para 328.5.4, Welded Branch Connections


File: B31-94-037

Question: In accordance with ASME B31.3-1993 Edition, Addenda a, what is the effective weld throat thickness required for a proprietary integrally reinforced branch connection fitting?

Reply: The thickness is as required by the manufacturer’s design qualified in accordance with para. 304.7.2 or MSS SP-94, and para. 328.5.4(d).


Subject: ASME B31.3-1990 Edition, Para. 341.3.4(e), Progressive Examination


File: B31-94-039

Question: In accordance with ASME B31.3-1990 Edition, para. 341.3.4(e), what is the meaning of the phrase “all items represented by the progressive examinations.”?

Reply: Ail items within the same designated lot. See para. 344.1.3 Definitions, random exumi- nations.


Subject: ASME B31.3-1993 Edition, Para. 345.4.2(a), Hydrostatic Test Requirements


File: B31-94-040

Question: Does ASME B31.3-1993 Edition, Addenda a, permit a hydrostatic test pressure less than 1.5 times design pressure?

Reply: No, unless para. 345.4.2(c) or 345.4.3(b) applies.

155



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13-14, 13-15, 13-16


B31.3 interpretations No. 13

Subject:


ASME B31.3-1993 Edition, Para. 319.4.1, Flexibility Analysis

File: B3 1-94-041

Question: In accordance with para. 319.4.1, how many years of operation or number of operating cycles are required to qualify a piping system as having a successful service record?

Reply: Such determination is the responsibility of the designer. See para. 300(b)(2).


Subject:


ASME B31.3-1993 Edition, Paras. 301.2.1 and 302.2.5, Design Pressure

File: B31-94-042

Question: When a valve isolates two process streams so that one condition on one side of the valve occurs at the same time as another condition occurs on the other side of the valve, are the requirements of paras. 301.2.1 and 302.2.5 met if the pressure design is based on the most severe conditions of coincident pressure and component temperature?

Reply: Yes.


Subject:


ASME B31.3-1993 Edition, Chapter VI Inspection, Examination, and Testing

File: B31-94-059

Question (1): In accordance with ASME B31.3-1993 Edition, Addenda a, if a weid has not penetrated to the inside corner of the root face on one side of the joint and the remainder of the weld is sound, does ASME B31.3 classi@ this defect as lack of fusion?

Reply (1): No, refer to Fig. 341.3.2 sketch (c).

Question (2): Can lack of fusion occur at the root of a groove weid joint?

Reply (2): Yes.

Question (3): Is 1.5 in. of incomplete penetration in any 6 in. weid length for girth and miter groove welds acceptable for normal fluid service?

Reply (3): Yes, per acceptance criteria listed in Table 341.3.2A.

156



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ASME B31-3*INT NO**13 ** 0757670 0.565960 L B T

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 631.3-1990 Edition . References in brackets are to

previous Editions and Addenda.)


No . - introduction ......................... .1-3. 1-6. 1.7. 13-04 300 . . . . . . . . . . . . . . . . . . . .7.10. 8-1 7 300(b) . . . . . . . . . . . . .09. 10.11. 13-14 300(~) . . . . . . .3.2. 3.4. 4.10. 6-03R (Vol . 7). 7.05. 8.30. 13-02 300(c) [300(e)] . . . . . . . . 1.3. 1.6. 1-7 300.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.10. 8.17. 9.06. 12-20 300.1.1 . . . . . . . . .1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8.01. 9-02 Fig . 300.1.1 .1.8. 1.19. 2.26. 7.10. 8-17

6. 3-2 300.1.3íd) ............................ 10-05 300.1.3 [300.1.4]. . . . . . . . . . . . . . . ..1.8. 1

300.2 Category D Fluid Service . . . . . . . . . . . . . . . . .4.13. 5.03. 6-01 Category M Fluid Service notch-sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22

piping components . . . . . . . . . . . . . . . . . piping system ..................... severe cyclic conditions .

301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

.......................... 2-3 . . . . . . . . . . . 10.02 . . . . . . . . . . . . 4.11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

302.2.4 L302.2.31 ..................... 1.3. 1.32. 2.14. 3.4. 4-1 1. 7.01. 7.04. 8-04

......................... .1 3.15 1.18. 1.38. 2.16. 3.13. 8.25. 11-05 .......................... 2-20

1.42. 1.78. 2.20. 3-1 1 . . . . . . . . 1.20. 1.50. 2.14. 2.15. 2.24. 3.4.

Table 302.3.4 . . . . . . . . . . . . . .

4-1 O. 4-1 2. 6-03R (Vol . 7). 6.07. 7.04. 7.05. 8-16

304.2.3 . . . . . . . . . . .


No . - 304.3.3 . . . . . . . . . . . 4.03, 7.02. 8.06. 8.37. 11.10. 12-05

................................... 8-37

. . . . . . . . . . . . . . . 1.21. 1.37. 1.55. 1.75. 2-27 Fig . 304.3.4 ....................................... 1.70 304.3.5 .......................................... 12-13 304.5 ................................. ..3.4. 9.07. 10-14

...................................... 8-18 304.5.1 (b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1 0

. . . . . . . 1.51. 3.2. 4.05. 5.05. 5-1 1. 6.09. 10.07. 10-1 1. 10.18. 12.09. 13.02. 13.03. 13.05. 13-1 1

304.7.4 ....................................... .................................

305.2.1 ........................................... 1-38 ................................ 6.01. 7.03

306.4 ............................................ 12-16 . . . . . . . . . . . . . . . 1 1-03

308.2.4 . . . . . . . . . . . . . . . . . . . . . . 5.12 311.2.4 . . . . . . . . . . . . . 311.2.5 ...................... 312 .............................................. 9-07 314.2.1 ......................

. . . . . . . . . . . . . . . 3-6 ...................................... 3-6

. . . . . . . . . . . . . . 1.17 ......................................... 8-13

. . . . . . . . . . . . . . 9.01

. . . . . . . . . . . . . . 2.17

. . .7.04. 7.05. 12-06

. . . . . . . . . . . . . . 4.1 0 55. 2.24. 5.15. 13-05

319.4.1 . . . . . . . . . . . . . . . . 1.33. 13-14 . . . . .1.71. 2.7. 2-24

. . . . . . . . . . . . .1.16. 7-05

. . . . . . . . . . . . . . 1-49

. . . . . . .10.10. 12-1 8 322.6.3 ...................... 1.32. 2.21. 2.29. 7.01. 12-04

323.1.2 . . . . . . . . 1.11. 1.15. 1.48. 2.1. 6.06. 8.07. 8.19. 11-03 323.2 .............................................. 3-9

......................... 1-13

. . . 1.12. 1.48. 1.65. 1.76. 2.19. 3.8. 4.01. 4-15

323.1.1 ........................................... 8-19

Table 323.2.2

Cumulative index . B3 1.3 Interpretations Vols . 1- 13 ia)



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No.

323.2.4 323.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12 Table 323.3.1

. . . . . . . .

[Table 323.2.21 . . 1-12, 1-76, 4-17, 5-19, 5-21, 8-29, 10-2, 11-12

323.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

328 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-02, 12-12 328.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-07 328.2 [327.5] . . . . . 328.2.1 [327.5 .5.2] 328.4.. . . . . . . . . . . . . . . . . 328.4.2 and Fig. 328.4.2 . . , . . . . . . . . . . . . . . . . . . . . . . . . .12-10 Figure 328.4.4 . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . .8-28, 9-08 328.5 [327.4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328.5.1 (327.4.11 . . . . . . 328.5.2 [327.4.21 . . . . . .

1-28, 5-1 2, 6-02, 6-05, 8-27

328.5.4 I327.4.41 . 1-59, 1-74, 2-10, 4-03, 4-14, 7-08, 8-13, 10-04, 13-1 1

Fig. 328.5.4 [Fig. 327.4.41 . . . . . . . . . . . . 1-59, 1-74, 4-03, 4-16, 7-08

. . . . . . 2-1 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21 330.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23 Table 330.1.1 331 . . . . . . _ . . _ _ _ _ 331.1.1 Table 331.1.1

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-08, 9-05

[Table 331.3.1 1 . . . . . . . . . . l -69, 2-2, 5-06, 8-24, 9-03, 12-1 4

. . . . . 1-39, 1-59, 4-06, 5-06, 9-03, 11-06

331.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 331.1.3 [331.3.6] . . . . .

331.1.4 [331.1.2] , . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . .5-O8

331.2.2 [331.1.1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-39, 1-78

335.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

340.3 [336.3] . . . . . . . . . . . . .

341 .................... . . . . . . . . . .

341.3.1 [336.5] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-64, 2-4 341.3.2 . . . . . . . .8-32 Fig. 341.3.2 [Fig. 327.4.11 . . . . . . . . . . . . . . . . . . . . . .5-09, 13-16 Table 341.3.2A

[Table 327.4.1Al 1-1, 1-9, 1-14, 1-41, 2-8, 5-04, 5-13, 5-16, 5-17, 5-18, 5-20, 6-04, 7-06,

8-32, 8-38, 9-04, 1 1-08, 11 -14, 12-22, 13-1 6 Table 341.3.28 [Table 327.4.1Bl . . . . . . . . . . . . . . . . .5-18, 6-04


No.

341.3.4 [336.5, 336.5.41 . . . , . . . . . 1-62, 2-25, 2-32, 3-5, 3-14, 10-09, 10-12, 11-02, 11-04, 13-12

341.4 [336.5] . . . . . . . . . . . . . . . . . 1-24, 1-45, 3-12, 5-20, 11-01 341.4.1 [336.5.1] . . . . 1-10, 1-26, 1-27, 1-60, 2-12,

2-28, 3-7, 3-12, 4-12, 5-10, 8-02, 8-10, 8-26, 10-03, 10-17,

11-11, 11-14, 11-15

341.4.3 . . . . . . . . . . . . . . . . . . . . . . . 341.5 . . . . . . . . . . . . . . . . . . . . . . 341.5.1 [336.6.1] . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .13-12 . . . . . . . . . . . . . . . _ _ . _ .2-28, 8-10, 8-26, 11-11 344.2 [336.4.2]

. . . . . . . . . . . . . . . 1-35

_ . . . . . . . . .

. . . . . . . . .

345.7 [337.5.2] , . . _ . . . . . _ _ _ _ . . . . _ _ . . 345.8 1337.61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .1-25, 3-10 345.9 [337.5.1] . . . . . . . . 4-09, 5-07, 6-08, 8-15, 10-15, 12-01,

1 2-2 1 A304 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 A304.5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. .8-14, 10-08, 13-08

M305.1 . . . . .

M335.4 [M335.5, M335.61

M341.4.1 [M336.5.1] . . . . . . . . .

. . . . . . . . . . MA323.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-02

(b) Cumulative index - B3 1.3 Interpretations Vols. 1 - 1 3



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No. _.

MA323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35 Appendix A Notes

(No equivalent) [(14)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20 Note (1 7) . . .

Note (57) [(2)] ...................... . . . . . . . .l-58 Appendix A

Table A-1 [Table i] . . . . . . . . . . 1-13, 1-18, 1-29, 1-38, 1-48, 1-77, 2-1, 3-8, 3-9, 3-13, 4-12,

4-1 3, 6-01, 6-06, 7-03, 8-1 1, 8-18, 8-25, 8-34, 8-36, 11-13, 12-09

Table A-1 B [Table i] . . . . . . . . . . . . . . . l-78, 2-20, 4-1 8, 7-03 Appendix D .................... 1-6, 1-7, 1-34, 1-46, 1-55,

1-56, 1-71, 2-7, 2-24, 4-16, 5-01, 5-1 5, 6-06, 12-08, 12-1 1, 12-1 7, 13-05

Appendix E [Appendix KI

. . . . . . . . . . . . . . . . .6-01, 8-09

. . . . . . . .13-O9

. . . . . . . . . .3-1 Case 141 . . . . . . . . . . . . . . . . . . . . . . . . 1-51

Cumulative Index - 63 1.3 Interpretations Vols. 1 - 13



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Subject

ASME B31-3*INT N O . * 1 3 ** 0759670 0565963 999

SUBJECT

Interpretation N O . -

Acceptance Criteria pressure tests ...................................... . l-2 weld . . . . . . . . . . . . . . . . . 1.1. 1.9. 1.14. 1.41. 2.8. 5.09. 5.13.

5.17. 5.18. 5.20. 6.04. 7.06. 8.32. 12.22. 13-16

Allowable Stresses . . ........................ 4-12 bases for .................... .1.18, 3.13. 8.11. 8.25. 10-13 for ASTM A 312 . . . ........................... 1-29 for ASTM A 351 . . . . . . . . . . . .

for ASTM A 570 . . . . . . . . . . . for ASTM A 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . for ASTM A 671 ...........

for austenitic stainless steels . .

. . . . . . . . . . . . . . . . 1-38

................ 1-48

. . . . . . . . . . . . . . . . 3.13

Alterations of Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l 3.04

Alternative Tests . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Tests

Authorized Inspector . . . . . . . . . . . . . . . . see Owner's Inspector

Bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3-09

Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.02, 8-03

Bends corrugated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-23 miter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Miter Bends reduction of outside diameter ......................... 8.20

Bonding Qualification Test hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 minimum burst pressure ........................ .7.09, 8-14 procedure specifications for plastic piping . . . . . . . . . . . . . . 10.08 solvent cement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14

Bonds heat fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.09

Bolting Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15

Branch Connections extruded outlets . . . . . . . . . . . . . . . . . . . . . . . . . . l-37, 2.27. 6-09 flexibility analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.01 integrally reinforced fitting . . . . . . . . . . . . . . . . . . . . . .4.05, 11-10 projection into run pipe . . . . . . . . . . . . . . . . . . . . . . . . .8.28. 9-03

INDEX


No . ._

reinforcement .................... .8.0 6. 8.37. 12.05. 12-1 3 weld requirements . .2.10. 4.03. 4.14. 7.02. 7.08. 10.04. 13-1 1

Brazed Joints for flammable service ................................ 1.17

Buckles ..................................... . l-23, 1-53

Cast Irons specific requirements .............................. .1 0.01

Category D Fluid Service alternative pressure test for .......................... . l-36 limitations ................................... .4.13, 5-03 radiographic examination ............................. 8.38

Category M Fluid Service clarification of term ........................... .1.73. 9-02 double contained piping .............................. 8.35 leak test ........................................... 6.08 liquid oxygen ...................................... 8.09 requirements ........................... .8.35, 9.02, 12-1 5 tubing size limitations ................................ 2.13 "very small quantity" ............................... . l-40

Code Coverage 631.3 versus 831.4 ........................... .l-47, 7-10 general hydrocarbon service .......................... 6.01 in-line sensing devices ............................... 8.01 new and replacement piping .................... 5.22, 12-2 1 offshore platform ................................... 8.17 oil heating system ................................... 4.19 radioactive fluids .................................. 12.20 synfuel plant piping ........................... . l-52, 2-26 tobacco plant piping .................................. 3.1

Components (see also Fittings. Flanges. Standard

certification ........................ . l-26, 3.7. 5-1 O. 13-10 design conditions .................................... 2.3 fabricated or flared laps ...................... .11.03. 12-1 6 in-line sensing devices ............................... 8.01 referenced standards .......................... .1.44. 5-10

components. Unlisted and Valves)

Compressors internal piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Corrugated Bends .................................. 1.23




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ASHE ~31.3*1NT N0.*l13 ** 0759670 0565964 825


Cyclic Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12


additional design considerations ..................... .1 2.13 conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 for stainless bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.23 Lame theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-57 minimum temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.02

Design)

Displacement Stress . . . . . . . . . . . . . . . . . . . . .2.14. 2.24. 12-06

Earthquake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Seismic

Empty System transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-06

Examination extent of . . . . . . . . . . . . . . . . . . . . . . . . 1.24. 5-1 8. 11-01

liquid pentrant . . . . . . . . . . . . . . see Liquid Pentrant Examination . . . . . . . . .see Progressive Examination

see Radiographic Examination

...................... 3-14, 11-15

. . . . . . . . . . . 1-27, 1-45, 1-62, 2-12, 2-32, 4-1 2, 1 1-1 5

.................... 11-11 required . . . . . . . . 1-24, 1-60, 6-04, 11-14, 11-15

. . . . . . . . . . . . . . 10-17, 11-14 spot . . . . . . . . . . ...................... 1-62 visual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see visual examination

. . . . . . . . . see ultrasonic examination

Exclusions for compressors and internal piping . . . . . . . . . . . . . . . . . . . for interconnecting piping . . . . . . . . . . . . . . . . . . . . . . . . . . . listed in scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expansion Joints . . . . . . . . . . . . . . . . . . . . . . .1.16. 12.23.

Extruded Outlet

. 1.8 1-19 10-5

3-09

pressure design of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-21, 1-70 tees considered as . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.55

Extruded Welded l e e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.01

Fillet Weld internal. slip-on flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.27 pressure containing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13 size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Fittings

conforming to two grades . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.18 flared. flareless. or

compression types . . . . . . . . . . . . . . . . . . . . . . . . . . .3.6. 12-1 6

616.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7. 5-01

MSS SP-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Flammable Service ................................. 1-1 7

Flanges assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.67, 3.4, 9-7


general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1 0 long welding neck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.05 slip-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.12, 8-27 use of aluminum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 1 use of raised and flat face metallic ..................... 9.07

Flexibility Analysis branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.01 exemptions from . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.33 qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13.05, 13-1 4


diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.56 for a tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.55, 1.56, 5-01 for components not listed

in Appendix D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.55, 2-24

Flexibility Factors basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 for 616.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7, 12.08, 12-17 for fabricated intersections . . . . . . . . . . . . . . . . . . . l-6, 4.16. 5-15 for pressure piping components ...................... 13.05 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6

Fluid Service general hydrocarbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.01 requirements, metallic . . . . . . . . . . . . . . . . . . 1 1-1 6. 12-1 5. 12-1 6 requirements. nonmetallic .................... .11.17. 11-18 responsibility for

categorizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.08. 8-09


onset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Hardness limitations on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

Heat Fusion Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.08

Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69 tee1 . . . . . . . . . . . .

.............................. 8-12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.08. 8-05

SP-1 through SP-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.24 when radiography i s

required ............................. 1.64. 2-4


Impact lests absorbed energy data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 alternative methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.30 base metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.01. 1 1-1 2

(f) Cumulative Index . B31.3 Interpretations Vols . 1-1 3



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No . -

exclusions from . . . . . . . . . . . . . . . . . . . . . . . . . . l-76, 5-1 4. 8-30 heat treatment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.19 in qualifying procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.29 of aluminum filler metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.19 of austenitic stainless steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-65 of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15 of the heat affected zone . . . . . . . . . . . . . . . . . . . . . . . .1.76, 5-21 of weldments . . 1.12, 1.65, 1.76, 5-21

. . . . . . . . . .5.14, 8-30

Imperfections (see also Acceptance Criteria) concave root surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .l. 6-04 determination of . . . . . . . . . . . . lack of fusion . . . . . . . . . . . . . . porosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9. 5.13. 5.16, 5-20

. . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Installed Piping . . . . . . . . . .

Instrument Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-07. 8-01

Internal Piping. Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . l-8


for branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.06 for circumferential welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-42 for longitudinal and spiral

welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.78. 3-1 1, 8-06

ASTM A 31 2. ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . 2.20

Joints circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6, 3-1 O instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13 threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16

Lateral Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-6

Leak Tests acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 alternative . . . . . . . . . . . . . .4.09. 5.07. 6.08. 8-1 5. 12.01. 12-21 as nondestructive examination . . . . . . . . . . . . 8.31 for Category D fluid service . . . . . . . . . . . . . . . . . 1.36 for system designed for

isolation of test pump o psi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . minimum hydrostatic test

minor repairs and additions of discharge piping . . . . . . . of newly constructed

. . . . . . . . . . . . . . . . . . . 1-2

pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.23, 4-04 . . . . . . . . . . 1.2

systems . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4, 5.02, 5.22, 8-15 . . . . . . . . . . . . . . . 1-63 of piping and vessel

of piping connecting equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

of replacement piping . . . . . . . . . . . . . . . . . . . . . . . . .5.22, 12-21 painting before test . . . . . . . . . . . . . . . . . . . . . . . .2.6, 3.10, 5-23 personnel qualification . . . . . 8-31


No.

pneumatic test . . . . . . . . . . . . . . . . . 1 1.07. 1 1.19. 12.02. 13-06 preparation for . . . . . . . . . . . . . . . . .2.6. 3.10. 5.02. 5.23. 12-03 reduced pressure

(hydrostatic test) ...................... .1.61. 2.23. 13-1 3 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.15. 13-1 3 sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 temperature correction for ...................... . l-35, 1-43

test pressure ...................................... 12.04 test fluid ......................................... 12-19

lethal Substance ................................... 1.73

limitations on imperfections ......................... see Imperfections on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 on tubing size ................................. .2.13. 3-6

Liquid Penetrant Examination requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.14

low Temperature Requirements ......................... see Impact Tests

Materials API 5L .............................. 1.78. 2.4. 3.9. 3.11.

6.01. 6-06 API 5LX ...................................... 2.4. 11-05 ASTM A 234 .................................. 2-20

....................... .1.29. 1.77. 2-20 ASTM A 351 ..................................... 11-13 ASTM A 387 ...................................... 8-25 ASTM A 403 ................................ .1.77. 2-20 ASTM A 487 ...................................... 8-07 ASTM A 537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ASTM A 570 ...................................... 1-38 ASTM A 587 ...................................... 1-13 ASTM A 633 ...................................... 1-11 ASTM A 658 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . . . 1-48

. . . . . . . . . . . . . . . . . . . 2.19 .............................. 4-18

........................ 8-11 austenitic stainless steels ............................. 3.13 bases for design stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-05

. . . .5.10. 8.02. 13-10 . . . . . . . . . . . . . . .8.18. 8-34

notch sensitive .................... 2-22 reidentification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.19 toughness requirements .............................. 5.19 unlisted material . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l l-05, 1 1-20

Miter Bends pressure design of ............................. . l-22, 5-11


explanation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Nomenclature d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 t , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75 T, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-04, 5-16

Runs

-

Cumulative Index . 63 1.3 Interpretations Vols . 1 . 1 3



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~~

ASME B3&.3*INT N O - * : L 3 ** = 0759670 0565966 bT8


No.

Nonmetallic Piping fluid service requirements . . . . . . . . . . . . . . . . . . . . . 11 -1 7. 1 1-1 8 in Category M Fluid Service . . . . . . . . . . . . . . . . . . . . . . . . . . 8.35 joint requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.09, 8-1 4

Notch Sensitive materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22

Occasional Variations (pressureltemperature allowances) . . . . . . . . 1.3. 2-1 4. 4-1 1

loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.50. 2-1 5. 2.16. 2-1 7

Owner responsibilities . . . . . . . 1.26. 2.30. 5-22

Owner’s Inspector qualifications of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.31 responsibilities of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-26

Pipe alterations of existing pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.04

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

pressure design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-07 pressure testing . . . . . . . . . . . 9-09 spiral welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-03 straight, under internal pressure . . . . . . . . . . . . . . . . . .10.20, 11 -21

Pipe supports configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.07 longitudinal stress effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.05 use of plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.49

Plastic lined pipe . use of screwed flanges . . . . . . . . . . . . . . . . . . . 8.33 pipe supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-49

Pneumatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Tests

Positions qualification of welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.66


Preheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Heat Treatment

Pressure Design for elevated temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 in the high pressure range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.68 of extruded headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -2 1, 1-70 of flanges and blanks ........................ .10.14, 13-15 of miter bends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 of pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.42, 1.54, 1.57, 1.68,

of unlisted components . . . . . . . . . . . . . . . . .13.02, 13.03, 13-05 of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.04, 13-1 5

1.70, 2.11, 11.21, 13-07

Pressure Rating valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.04 variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.11


No . -

Pressure Relief Devices acceptable devices ............................ .2.21. 2-29 and test pressure ..................... .11.07, 11 .19, 12-04 setting ................................ .1.32. 7.01. 12-04 stop valves ................................ .10.10. 12-18

Pressure Surges loads due to ...................................... . l-50

Pressure-Temperature Rating . . . . . . . . . . . . . . . . . . .5.05, 8-34

Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Test


11.02. 11.04. 13-12

Published Specification ............................. 1-1 5

Radiographic Examination 100% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09 as supplementary examination ......................... 8.38 random radiography . . . . . . . . . . . . . . . . . 1.27, 1.45, 1.62, 2-1 2.

records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 0 requirements .................... .6.04. 1 1.01. 1 1.05. 1 2-03 selection of welds for

examination ...................................... 2-25 spot radiography .............................. . l-62, 3-12 when PWHT is required ........................ .1.64. 2-4

2.32. 3-12

Records certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 O. 8.02. 10-03 of examinations .................................. .1 1.11 of hardness tests .................................... 8.22 for radiographic examination .......................... 1.10 retention of ........................................ 1.10

Reinforcement. Branch attachment weld .............................. .4.03. 7-08 clarification of terms .......................... .1.37. 11-10 limits of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.27. 9-04

Repairs to welds .......................................... 2.18

Responsibility designer ...................................... 10-1 1 rights of owner’s inspection ....................... 10-03

Safeguarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12


Seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-07 stresses due to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17


Simplified Flexibility Analysis ....................... . l -33

íh) Cumulative Index . 63 1.3 Interpretations Vols . 1 . 13



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ASME B31-3*INT N O - * I J ~ ** 0759670 O565967 534 =


No . - Standard Components manufacturers markings ......................... .3.7. 8-02 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.05. 8.04. 8-07

Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 O superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.44

Stresses (see also

displacement stress range ...................... .7.04. 12-06 due to cold spring .................................. 8.16 due to occasional loads .............................. 2.16 due to pressure surges ............................... 1-50 due to seismic loads ................................. 2-17 due to thermal gradients .............................. 3.4 longitudinal . . . . . . . . . . . . . . . . . . . 1.20, 1.50, 2.15, 2.24, 4.10,

Allowable Stresses)

4.12, 6-03R (Vol . 7), 6.07, 7.05, 8-16

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . .1.34. 2.24. 6-03R (Vol . 7) basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 for 616.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 for fabricated intersections ....................... . l-6, 5-1 5 for tees . . . . . . . . . . . . . . . .1.46, 1.55, 1.71, 5.01, 12.08, 12-17 for unlisted components ............................ .l 3.05 for welded elbows ............................ . l-6, 12-1 1

Temperature design minimum temperature ....................... .i 0.02 large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.09 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.13, 5-1 4 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.11

Thermoplastic piping heat fusion joints .................................... 13-08 solvent cemented joints .............................. 10-08 specific requirements ................................ 10-06

Tubing joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13. 3-6


Thickness Allowances in stress calculations ................................. 1-20

Ultrasonic Examination in place of radiography ............................. 1 1-05 requirements ..................................... .l 0-1 7

Unlisted components . . . . . . . . . . 1.6. 1.51. 3.6. 4.05. 5.05. 8.7. 10.18.

materials ................................... see Materials 10-1 1. 10.07. 12.09. 13.02. 13.03. 13-05

Valves Category M Fluid Service ............................. 8.35 materials .......................................... 8.07 pressure build up ................................... 8.04 ratings ............................................ 5-05

Visual Examination internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.10. 8.26. 13-1 6 requirements .......................... .2.28. 10.03. 13-1 6

Washers. Use of .................................... 2.5

Weld bevels .......................................... . 1 0 2.1 examination of welds . . . . . . . . . . . . 10.15. 11.01. 11.14. 13-16 fillet size ................................... .1.74. 10-19 for branch connections . . . . . . . . .2.10. 4.03. 4.14. 8.37. 11-10 imperfections ...................... see Acceptance Criteria longitudinal ............................. .2.20. 3-1 1. 4-18 of valves ........................................ .i 2.12 preparation for welding ............................. 13.01 qualification of position .............................. 1.66 reinforcement ............................... .7.08. 1 1-08 repair ............................................. 2-18 socket ................................ .6.02. 6.05. 10-1 9 spacing of ......................................... 7.02

Welding Procedure qualification of .1.12. 1.65. 1.66. 1.76. 4.17. 8.23. 8.29. 11-09 responsibility ............................... .12.07. 12-1 2 specification ................................. .8.21. 8-22

Cumulative index . B31.3 Interpretations Vols . 1-13



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~~ ~

ASME B31.3JINT NOmJ13 ** 0759670 05b5968 470 =

A3793C



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ASME B31.3



General Information


These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity. In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply bearing the original interpretation number with the suffi R is presented.

ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,” “certiw,” “rate,” or “endorse” any item, construction, proprietary device, or activity.




135



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B31.3

Subject Interpretation Para . 301.1 Scope ................................................................. 12-20 Para . 304.3.3, Reinforcement of Welded Branch Connections ........................... Para . 304.3.5(d), Additional Design Considerations .................................... Para . 304.7.2(e) and Table A.1. Unlisted Components and Elements . and Basic

Allowable Stresses ............................................................... Para . 306.4, Fabricated or Flared Laps ............................................... Para . 319.2.3, Displacement Stress Range ............................................. Para . 322.6.1, Stop Valves in Pressure Relief Piping .................................... Para . 322.6.3(b)(2), Pressure Relieving Devices ........................................ Para . 328. Welding ................................................................ Para . 328.1, Welding Responsibility .................................................. Para . 328.4.2(a)(2) and Fig . 328.4.2 Sketches (a) and (b). End Preparation ................ Paras . 345.1 and 345.9, Required Leak Test and Altemative Leak Test ................... Para . 345.3, Preparation for Leak Test ............................................... Para . 345.4.1, Hydrostatic Leak Test ................................................. Para . 345.5.4, Pneumatic Leak Test Pressure .......................................... Para . 345.9, Alternative Leak Test ................................................... Para . M305.1, Fluid Service Requirements for Metallic Piping Components ............... Para . X3.1.3 and Fig . X3.1.3, Design Fatigue Curve for Stainless Bellows ................. Table 331.1.1, Heat Treatment Requirements ......................................... Table 341.3.2a, Acceptance Criteria for Welds ........................................ Table D.1. Flexibility and Stress Intensification Factors ................................ Table D.1. Flexibility and Stress Intensification Factors ................................ Table D.1. Flexibility and Stress Intensification Factors ................................

12-05 12-13

12-09 12-16 12-06 12-18 12-04 12-12 12-07 12-10 12-21 12-03 12-19 12-02 12-01 12-15 12-23 12-14 12-22 12-11 12-17 12-08

File No . B31-93-041 B31-93-004 B31-93-027

B31-93-017 B31-93-032 B31-93-007 B31-93-035 B31-93-001 B31-93-024 B31-93-009 B31-93-022 B31-93-044 B31-92-075 B31-93-036 B31-92-074 B31-92-072 B31-93-031 B31-93-055 B31-93-030 B31-93-051 B31-93-006 B31-93-034 B31-93-010

137



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831.3 Interpretations No. 12 12-01, 12-02.12-03


Subject: ASME B31.3-1990 Edition, Para. 345.9, Alternative Leak Test


File: B31-92-072

Question: In accordance with ASME B31.3-1990 Edition, may in-process examination, in accordance with para. 344.7, be substituted for all or part of the radiographic examination requirements specified in para. 345.9.1 if so specified in the engineering design?

Reply: No.


Subject: ASME B31.3-1990 Edition, Para. 345.5.4, Pneumatic Leak Test Pressure


File: B31-92-074

Question: In accordance with ASME B31.3-1990 Edition, para. 345.5.4, does the Code require that pneumatic test pressure be adjusted according to the ratio of stress value at test temperature to stress at design temperature?

Reply: No.


Subject:


ASME B31.3-1990 Edition, Para. 345.3, Preparation for Leak Test

File: B31-92-075

Question: In accordance with ASME B31.3-1990 Edition, does the Code require that all radiographic examination, and all owner-specified magnetic particle examination, be completed before any leak testing is performed?

Reply: No.

139



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ASME B3L=3*INT N 0 - * 1 2 ** I 0757670 0542185 724 I, ~

~ ~~ ~~~~

12-04.12-05 831.3 Interpretations No. 12


Subject: ASME B31.3-1990 Edition, Para. 322.6.3@)(2), Pressure Relieving Devices


File: B31-93-001

Question (1): In accordance with ASME B31.3-1990 Edition, if the syst m test pressure is greater than 120% of design pressure, is it acceptable to set a liquid thermal relief device at the system test pressure?

Reply (1): No; the set pressure shall not exceed 120% of design pressure, unless the requirements of para. 322.6.3(b)(l) are met.

Question (2): Which pressure is considered the system test pressure for a piping system where all piping subassemblies which include all welds and components are hydrotested at 150% of design pressure and then assembled and pneumatically tested at 110% of design pressure?

Reply (2): 110% of design pressure.

Question (3): What is the basis for the 120% of design pressure as used in para. 322.6.3(b)(2)?

Reply (3): The Committee does not provide rationale.


Subject: ASME/ANSI B31.3-1987 Edition, Para. 304.3.3, Reinforcement of Welded Branch Connections


File: B3 1-93-004

Question: In accordance with ASME/ANSI B31.3-1987 Edition, does a fabricated tee, for which the rules of para. 304 apply, that has been proof tested in accordance with the rules of ASME B16.9 and its references, also have to meet the requirements of para. 304.3.3 to determine the amount of reinforcement required?

Reply: Yes, unless it meets all of the requirements of ASME B16.9

140



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831.3 Interpretations No. 12 12-06.1247.12-08


Subject: ASME B31.3-1990 Edition, Para. 319.2.3, Displacement Stress Range


File: B31-93-007

Question: In accordance with ASME B31.3-1990 Edition, does para. 319.2.3 require that the difference between the minimum and maximum piping temperatures, whether caused by ambient or operating conditions, be considered as one of the range of conditions for calculating the displacement stress range?

Reply: Yes.


Subject: ASME B31.3-1990 Edition, Para. 328.1, Welding Responsibility


File: B31-93-009

Question: In accordance with ASME B31.3-1990 Edition, para. 328.1, is it permissible for owner, rather than employer, to assume responsibility for the welding done by employer’s personnel; and for owner to provide WPS, PQR, and to arrange for tests required to qualify or r equa le welders and welding operators?

Reply: No.


Subject: ASh4E B31.3-1990 Edition, Table D-1, Flexibility Factor k and Stress Intensification Factor i


File: B31-93-010

Question: In accordance with ASME B31.3-1990 Edition, may a tee manufactured in accordance with ASME B16.9, that does not meet the radius and thickness requirements listed in Table D-1 of Appendix Dy be used in the construction of B31.3 piping systems?

Reply: Yes; however, the stress intensification factor listed in Table D-1 of Appendix D for B16.9 tees does not apply. Refer to Notes for Table D-1 and para. 319.3.6 for additional guidance on stress intensification factors.

141



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12-09, 12-10,12-11 B31.3 interpretations No. 12


Subject: ASME B31.3-1990 Edition with Addenda, Para. 304.7.2(e) and Table A-1, Unlisted Components and Elements and Basic Allowable Stresses


File: B31-93-017

Question (i): In accordance with ASME B31.3-1990 Edition, does the Code permit the use of pipe made from ASTM A 240 Grade 321H plate in accordance with ASTM A 358?

Reply (1): Yes, see para. 323.1.2.

Question (2): If so, can the allowable stresses listed for ASTM A 312 Grade TP 321H with appropriate joint factors be used?

Reply (2): The Code does not spec@ allowable stress values for unlisted materials.


Subject: ASME B31.3-1990 Edition With ASME B31.3b-1991 Addenda, Para. 328.4.2(a)(2) and Fig. 328.4.2 Sketches (a) and (b), End Preparation


File: B31-93-022

Question: In accordance with ASME B31.3-1990 Edition with ASME B31.3b-1991 Addenda, para. 328.4.2(a)(2) and Fig. 328.4.2 sketches (a) and (b), can the tolerance for the end bevel angle for a groove weld exceed plus or minus 2V2 deg, if verifiable to the WPS?

Reply: Yes.


Subject: ASME B31.3-1990 Edition, Table D-1, Flexibility and Stress Intensification Factors


File: B31-93-006

Question: In accordance with ASME B31.3-1990 Edition, what is the definition of “large diameter thin wall elbows” mentioned in Note (7) to Table D-l?

Reply: A large diameter thin wall elbow is one in which the pressure significantly affects the calculated values of k and i when corrected by the equation in Note (7).



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Subject: ASME B31.3-1993 Edition, Para. 328, Welding


File: B31-93-024

Question: In accordance with MME B31.3-1993 Edition, if a customer invokes B31.3 in his general specification and requires that the valves be made to MME B16.34, do the specific requirements of B16.34 in reference to welding and postweld heat treatment take precedence over the requirements given in B31.3 for pipe welding?

Reply: B16.34 applies to the manufacture of the valve. Welding of the valve to the piping system (including postweld heat treatment) shall be per the requirements of B31.3.


Subject: ASME B31.3-1993 Edition, Para. 304.3.5(d), Additional Design Considerations


File: B31-93-027

Question (1): In accordance with ASME B31.3-1993 Edition, may the ribs and gussets referred to in para. 304.3.5(d) be either internal or external?

Reply (1): Yes.

Question (2): Does the placement of one or more bars across the internal opening of a branch connection contribute to reinforcement of the opening?

Reply (2): No, unless qualified in accordance with the requirements of para. 304.7.2


Subject: ASME B31.3-1990 Edition With Addenda ASME B31.3a-1990, Table 331.1.1, Heat Treatment Requirements


File: B31-93-030

Question: In accordance with ASME B31.3-1990 Edition with Addenda ASME B31.3a-1990, Table 331.1.1, do P-No. 5 materiais with a chromium content greater then 3% but less than lo%, a carbon content less than 0.15%, and a nominal thickness of V2 in. or less require postweld heat treatment?

Reply: Yes.

143



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Subject: ASME B31.3-1993 Edition, Para. M305.1, Fluid Service Requirements for Metallic Piping Components


File: B31-93-031

Question: In accordance with ASME B31.3-1993 Edition, may tubing be used for process piping in Category M Fluid Service?

Reply: Yes; see para. M305.1 and definition of pipe in para. 300.2.


Subject: ASh4E B31.3-1993 Edition, Para. 306.4, Fabricated or Flared Laps


File: B3 1-93432

Question: In accordance with ASME B31.3-1993 Edition, what are the limitations of “hot flaring” NPS 6-12 ASTM B 106 Grade B and A 53 Grade B carbon steel pipe?

Reply: Hot flaring for NPS 6-12 is not permitted for severe cyclic conditions, Category M Fluid Services, or High Pressure Fluid Services. For Normal Fluid Service, see paras. 306.4.2, 332.1, and 332.3.


Subject: ASME B31.3-1990 Edition, Table D-1, Flexibility Factor k and Stress Intensification Factor i


File: B31-93-034

Question: In accordance with ASME B31.3-1990 Edition, Table D-1, Appendix D, does the use of the stress intensification factor listed..for a welding tee per ASME B16.9 require T, = 1.5T for both full size and reducing tees?

Reply: Yes; however, see Note (11) to Table D-1 and para. 319.3.6 for additional guidance when the thickness limits are not met.

144



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Subject: ASME B31.3-1993 Edition, Para. 322.6.1, Stop Vaives in Pressure Relief Piping


File: B31-93-035

Question: In accordance with ASME B31.3-1993 Edition, para. 322.6.1, may a stop valve be installed between piping being protected and its protective device or devices, or between the protective device or devices and the point of discharge?

Reply: Yes, provided that the requirements of para. 322.6.1 (a) and (b) or (b) and (c) are met. The precautionary consideration of Appendix F, para. F322.6, should be taken into account in the engineering design.


Subject: ASME B31.3-1993 Edition, Para. 345.4.1, Hydrostatic Leak Test


File: B3 1-93-036

Question: In accordance with ASME B31.3-1993 Edition, does the B31.3 Code contain requirements for the water to be used for hydrostatic testing?

Reply: No, except see paras. 345.2.2(c) and 345.4.1.


Subject: ASME B31.3-1993 Edition, Para. 300.1, Scope


File: B31-93-041

Question: In accordance with ASME B31.3-1993 Edition, may the owner apply B31.3 to piping containing radioactive fluids in a chemical plant?

Reply: Yes, see the Introduction which states that, “If no Section of the Code for Pressure Piping specifically covers the installation, the owner at his discretion may select any Section determined to be generally applicable ... It should be noted, however, that requirements supplementing the Code Section may be necessary to provide safe piping for the intended application.”

145



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Subject: ASME B31.3-1990 Edition, Paras. 345.1 and 345.9, Required Leak Test and Aiter- native Leak Test


File: B3 1-93-04

Question (1): In accordance with ASME B31.3-1990 Edition, when parts of an existing piping system are replaced, does the Code require that the conditions of para. 345.1 be met?

Reply (1): ASME B31.3-1990 Edition is intended to apply to newly constructed piping. By contractual agreement it may be applied to the repair or replacement of piping.

Question (2): Does the alternative leak test in para. 345.9 apply only to welded joints?

Reply (2): No. Also, see para. 345.2.2(a).

Interpretation: 12.22

Subject: ASME B31.3-1993 Edition, Table 341.3.2a, Acceptance Criteria For Welds


File: B3 1-93-05 1

Question: In accordance with ASME B31.3-1993 Edition, Table 341.3.2a, criterion value symbols B, C, F and G, would the ailowable cumulative length of a defect be prorated down for welds containing less than the weld length shown?

Reply: The Code does not specifically address this situation.


Subject: ASME B31.3-1993 Edition With Addenda ASME B31.3a-1993, Para. X3.1.3 and Fig. X3.1.3 Design Fatigue Curve for Stainless Bellows


File: B31-93-055

Question: In accordance with ASME B31.3-1993 Edition with Addenda ASME B31.3a-1993, para. X3.1.3, shall an additional temperature correction factor be applied to the equation for N, in Fig. X3.1.3?

Reply: No.

146



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CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME B31.3-1990 Edition References in brackets are to



N O . - Introduction . ...................... 1.3. 1.6. 1-7

....................... .7.1 O. 8-17 . . . . . . . .1.26. 1.32. 4.08. 5.03. 8.09. 10-1 1

300ic) . . . . . . . . . . . . .3.2. 3.4. 4.10. 6-03R (Vol . 7) . 7.05. 8-30 300(c) (300ie)l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3. 1.6. 1-7

300.1.1 . . . . . . . . .1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8.01. 9-02 Fig . 300.1.1 . . . . . . . . . . . . . . . . . . . .1.8. 1.19. 2.26. 7.10. 8-17

300.1.3íd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-05 300.2

Category D Fluid Service . . . . . . . . . . . . . . . . .4.13. 5.03. 6-01 Category M Fluid Service . . . . . .1.40. 1.73. 6.01. 8.09. 9-02 notch-sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22 owner . . . . . . . . . . . . . . . . . . 2.30 piping components

severe cyclic conditions ...................... .5.12. 8-09 301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 301.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3. 7-01 301.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

300.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.1 O. 8.17. 9.06. 12-20

300.1.3 [300.1.4] . . . . . . . . . . . . . . . . .1.8. 1.16. 1.19. 1.26. 3-2

. . . . . 2.3 301.3.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-02 301.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

............................ 4-07

............................. 3-4 302 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 302.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-50 302.2.4 (302.2.31 ..................... 1.3. 1.32. 2.14. 3.4.

4-1 1. 7.01. 7.04. 8-04 .1.18. 1.38. 2.16. 3.13. 8.25. 11-05 ........................... 2-20

Table 302.3.4 ...................... .1.42. 1.78. 2.20. 3-1 1 302.3.5 . . . . . . . . . . . . . . . . . . 1.20. 1.50. 2.14. 2.15. 2.24. 3.4.

4-1 O. 4-1 2. 6-03R (Vol . 7) . 6.07. 7.04. 7.05. 8-16

302.3.6 ........................... . l-50, 2-1 5. 2-1 6. 2-1 7 302.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 303 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-05 304.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.42. 1.54. 1-70 304.1.2 . . . . . . . . . . . . . . . . .1.42. 1.57. 1.68. 1.70. 2.11. 10-20 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.22. 5-11 Fig . 304.2.3 . . ............................. 1-22 304.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.21. 1.46. 5.01. 6-09

304.3.3 . . . . . . . . . . . . . . . .4.0 3. 7.02. 8.06. 8.37. 11.10. 12-05 304.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-05


N O . -

Fig . 304.3.3 . . . . . . . ..................... 8-37 304.3.4 . . . . . . . . . . . .l-21. 1.37. 1.55. 1.75. 2-27 Fig . 304.3.4 . . . . . . . ...................... 1-70 304.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13 304.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3. 1. 9.07. 10-14 304.5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18 304.5.1 íbr ....................... . . . . . . . . . . . . . . . 9.10 304.7.2 . . . . . . . . . . . . 1.51. 3.2. 4-05 05 . 5-1 1, 6.09. 10.07 .

10.11. 10.18, 12-09 304.7.4 ........................................... 1-16 305.2 . . . . . .............................. 3.8 . 3-9 305.2.1 ........................................... 1-38 305.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.01, 7-03 306.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16 306.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-03 308.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 308.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 31 1.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.02. 6-05 31 1.2.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 0.04 312 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.07 314.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 Table 314.2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.33. 11-16 315.2 .......................... . . . . . . . . . . . . . . . 3.6 315.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6

................................... 1-17

................................ Table 319.3.6 ...................................

................................... 2-17 3 19.2.3 ............................... .7.01. 7.05. 12-06 31 9.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.10 319.3.6 ........................ .1.6. 1.7. 319.4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319.4.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319.7 .1.16. 7-03 321.1.1 . . . . . . . . . . . . ..................... 321.1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-49 322.6.1 . . . . . . . . . . ..................... .10.1 O. 12-18 322.6.3 ...................... 1.32. 2.21. 2.29. 7.01 . 12-04 323.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19

1.11. 1.15. 1.48. 2.1. 6.06. 8.07. 323.2 ....................................... 323.2.1 ........................................... 1-13 Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . . . . 1.12. 1.48. 1.63. 1.76, 2.19. 3.8 . 4.01, 4-15

323.2.4 ........................................... 6-06

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .




--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---


No.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.76. 5-13 323.3.2 11-12 Table 323.3.1

[Table 323.2.21 . . . . . . . . . 1-12, 1-76. 4.17, 5-19, 5-21, 8-29,

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.2, 11-12 323.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-30 323.3.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lo-01, 10-19 TaMe 323.3.5 . . . . . . . . ........................... 5-14 Table 326.1 . . . . . . . . . . . . . . . . . 1-11, 1.51, 2-3, 8.07, 8-34 328 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-02, 12-12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-07

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66, 11-09 328.2.1 1327.5.1, 327.5.21 . . . . . . . . . . . . . . . . .l-76, 4-17, 8-29 328.4.2 and Fig . 328.4.2 .........................

328.5 1327.41 . . . . . . . . . . 328.5.1 I327.4.11 . . . . . . . 328.5.2 I327.4.21 . . . . . . . Fig . 328.5.2 [Fig . 327.4.21 . . . . . .

Figure 328.4.4 . . . . . . . . .

1-28, 5-12, 6.02, 6-05,

328.5.4 (327.4.41 . . . . . . . . . . . . . . . . . . . 1-59, 1-74, 2-10, 4-03, 8-2 7

4-14, 7-08. 8.13, 10-04 Fig . 328.5.4 [Fig . 327.4.41 . . . . . . . . . . . . 1-59, 1-74, 4.03, 4-16.

7-08 328.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21 330.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 330.1.1 . . . . . . . . . .

331.1.1 ......................... . .8.08, 9-03 Table 331.1.1

ITable 331.3.11 . . . . . . . . . 9, 2-2. 5-06, 8.24, 9-03, 12-14 331.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 331.1.3 I331.3.61 . . . . . . . . . . 1-39, 1-59, 4.06, 5.06, 9-03,

1 1-06 331.1.4 I331.1.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-08 331.1.6 1331.3.43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-08 331.1.7 1331.3.21,. . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-78, 8-22 331.2.2 [331.1.1] .............................. 1-39, 1-78 331.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 331.3.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-05 332.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-03 332.2 1329.1) ...................... .l-23, 1-53, 4-02, 8-20 332.4 1329.3. 330.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

332.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-03 335.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 340.2 I336.1.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 340.3 [336.3] . . . . . . . . . . . . . . . . . . . . . . . . . . 340.4 [336.2] . . . . . . . . . . . . . . . . . . . . . . . . . . 341 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16 341.2 1336.1.1, 336.1.33 . . . . . . . .l-10, 1-26, 1-27, 2-28, 10-03 341.3.1 1336.51 ............................ 341.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 341.3.2A Fig . 341.3.2 (Fig . 327.4.1) ............................ 5.09

[Table 327.4.1AI . . . . . . . . . . 1-1, 1-9, 1-14, 1-41. 2-8, 5-04. 5-13, 5-16, 5-17, 5-18, 5.20, 6.04,

Table 341.3.26 [Table 327.4.181 . . . . . . . . . . . . . . . . .5-18, 6-04 7-06, 8-32, 8-38, 9.04, 11 -08, 11 -1 4, 12-22

341.3.4 (336.5, 336.5.41 . . . . . . . . . 1-62, 2-25, 2-32, 3-5, 3-14, 10-09, 10-12, 11.02, 11-04

. . . . .l-24, 1-45, 3-12, 5-20, 11-01 341.4 1336.51 . . . . . . . . .


&

341.4.1 I336.5.11. . . . . . . . . . . . . . 1-10, 1-26, 1-27. 1.60. 2.12. 2.28. 3.7. 3.12. 4.12. 5.10.

11.11, 11.14, 11-15 8.02. 8.10. 8.26. 10.03. 10.17.

341.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38 341.4.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 341.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38 341.5.1 I336.6.11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5, 3-12 342.1 I336.4.1 J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.28 343 1336.4.11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.28 344 I336.41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09 344.2 1336.4.21 . . . 2.28, 8.10, 8.26, 11-1 1 344.5 [336.4.5] . . . . . . . . .1.10. 1.60. 2-12 344.6 [336.4.6] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.60

345 13371 . . . . . . . . . . . . . . . . . . . . . . . 345.1 I337.11 . . .

345.2.4 1337.4.33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.35 345.2.6 [337.1] 1.2. 5-22 345.3 [337.3] . . . . . . . . . . . . . . . . . . . . . . . 2.6. 3.10, 5-02. 12-03 345.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-04 345.4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 2.19 345.4.2 I337.4.11 . . . . . . . . . .1.35. 1.61. 1.63. 2.23. 4.04, 9-09 345.4.3 1337.4.21 . . 345.5 1337.4.41 .................... 345.5.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-19 345.5.4 . . . . . . . . . . . . . . . . . . .l 2.02 345.7 1337.5.23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.36

....................... 1.25. 3-10 345.9 [337.5.1] . . 4.09. 5.07. 6.08. 8.15. 10.15, 12.01.

12-21 A304 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

. . . . . . . . . . . . . .

A304.5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A305 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A323.4.2 . . . . A314 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-33

A327.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-09

A328.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.14, 10-08

K322.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 Fig . K328.5.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.37 M305.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l 2.15

M323.1.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 M326 . . . . 2-13 M335.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 M341.4 lM336.51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.24, 1-45 W341.4.1 [M336.5.1] 2.28, 3-7 M345.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 WA306.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-02 MA323.4 . . . . . . . . . . . . . . . . . . . . . . . . . MA323.4.2 ....................... Appendix A Notes (No equivalent) [ClSI . . . 2.20

hote (20) [!30)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.77 Note (1 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.18

íb) Cumulative Index . 631.3 Interpretations Vols . 1-1 2



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

Code Reference interpretation

NO.

Note (57) 1i2)] . ................................. . l -58

Table A-1 [Table i ] . . . . . . . . . . 1-13, 1-18, 1-29, 1-38, 1-48, Appendix A

1-77, 2-1, 3-8, 3-9, 3-13, 4-12, 4-13, 6-01, 6-06, 7-03, 8-11,

8-18, 8-25, 8-34, 8-36, 11-13, 12-09 Tabk A-16 [Table i ] . . . . . . . . . . . . . . .1-78, 2-20, 4-18, 7-03

Appendix D .................... 1-6, 1-7, 1-34, 1-46, 1-55, 1-56, 1-71, 2-7, 2-24, 4-1 6,

5-01, 5-1 5, 6-06, 12-08, 12-1 1, 12-1 7 Appendix E [Appendix K I ...................... .l-44, 5:lO Appendix F (F323.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -29 A d i x G ....................................... 5-12 Appendix H ............................. Appendix J ........................ .1-28, 1-54, 1-75, 5-04 Appendix M ............................ Appendix X, X3.1.3 ...................... Case 137 ...............................

...................... 1-51


No. -

Cumulative index - B31.3 interpretations Vols. 1-1 2



--```,``,`,`,,,``,```,,`,,,,,`,`-`-`,,`,,`,`,,`---

.

Subiect

SUBJECT


Acceptance Criteria pressure tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 weld . . . . . . . . . . . . . . . . . 1.1. 1.9. 1.14. 1.41. 2.8. 5.09. 5.13.

5.17 . 5.18 . 5.20 . 6.04. 7.06. 8.32. 12-22

Allowable Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.12

for ASTM A 312 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 for ASTM A 35 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 3 for ASTM A 387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.25 for ASTM A 570 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.38 for ASTU A 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.13 for ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-48 for ASTM B 464 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11 for austenitic stainless steels .......................... 3.13

bases for . . . . . . . . . . . . . . . . . . . .1.18. 3.13. 8.11. 8.25 . 10-13

Alternative Tests . . . . . . . . . . . . . . . . . . . . . . . . . . s e e Leak Tests

Authorized Inspector . . . . . . . . . . . . . . . see Owner's Inspector

Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.02. 8-03

Bends corrugated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 miter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Miter Bends reduction of outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

Bonding Qualification Test hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 minimum burst pressure ........................ .7.09. 8-1 4 procedure specifications for plastic piping . . . . . . . . . . . . . . 10.08 solvent cement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14

Bonds heat fusion ........................................ 8.14 hot gas welded ..................................... 8.14 test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.09


Branch Connections extruded outlets . . . . . . . . . . . . . . . . . . . . . . . . .1.37. 2.27. 6-09 flexibility analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.01 integrally reinforced fitting ..................... .4.05, 1 1-1 O projection into run pipe ........................ .8.28. 9-03 reinforcement .................... .8.0 6. 8.37. 12.05. 12-1 3 weld requirements . . . . . . . . 2.1 O. 4.03. 4.14. 7.02. 7.08. 10-04

Brazed Joints for flammable service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 7

INDEX

Subiect

Buckles . . . . . . . . . . . . . . . . . .

Cast ions specific requirements . . . . .

Category D Fluid Service alternative pressure test for


... . . . . . . . . . . . . . . 1.23. 1-53

. . . . . . . l 0.01

. . . l-36 limitations ................................... .4.13. 5-03 radiographic examination ............................. 8.38

Category M Fluid Service clarification of term ........................... . l-73, 9-02 double contained piping . . . . . . . . . . . . . 8.35 leak test .................... liquid oxvgen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09

. . . . . . . . . . . . . . .8.35. 9.02. 12-15

"very small quantity" ................................ 1.40

. . . . . . .

....................

Code Coverage B31.3 versus 631.4 ........................... .1.47, 7-10 general hydrocarbon service .......................... 6.01 in-line sensing devices . . .......................... 8-01 new and replacement pipi .................... 5.22 . 12-21 offshore platform ................................... 8.17

. . . . . . . . . . . . . . . . . l 2.20 synfuel plant piping ........................... . l-52, 2-26

oil heating system ................................... 4.19

tobacco plant piping .................................. 3.1

Components (see also Fittings, Flanges, Standard

certification .............................. .1.26. 3.7. 3-10 design conditions . . . . . . . . . . . . . .................... 2-3 fabricated or flared laps ...................... .11.03. 12-16 in-line sensing devices ............................... 8.01 referenced standards . . ..................... 1.44, 5-10

components, Unlisted and Valves)

Compressors internal piping ....................................... 1.8


Cyclic loading .................................... 5.12

Design (see also Pressure Design)

additional design considerations ..................... . l 2.13 conditions .......................................... 2-3

Cumulative index . B31.3 Interpretations Vols . 1 . 12



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Subject

Fluid Service general hydrocarbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .&O1 requirements, metallic . . . . . . . . . . . . . . . . . .11-16, 12-1 5, 12-1 6 requirements, nonmetallic .................... . l 1-1 7, 1 1-1 8 responsibility for

categorizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-08, 8-09

1

~ -~

I ASME B31=3*INT NO**32 ** 0759670 0542396 50T

~ - ~ ~~

I ' Impad Tests

absorbed energy data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9 alternative methods . . . . . . . . . . . . . . . . base metal.. . ..................... exclusions from . . . . . . . . . . . . . . . . . . . . . . . . . . l-76, 5-1 4, 8-30 heat treatment required . . . . . . . . . . . . . . . in qualifying procedures . . . . . . . . . . . . . of aluminum filler metals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19 of austenitic stainless steel . . . . . . . . . . . of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15 of the heat affected zone.. ..................... .l-76, 5-21 of weldments ...................... .l-12, 1-65, 1-76, 5-21 temperature limitation . . . . . . . . . . . . . . . . . . . . . . . . . .5-14, 8-30


for stainless bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-23 Lame theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-57 minimum temperature ............................. .lo-O2

Displacement Stress .................... .2-14, 2-24, 12-06

Earthquake.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Seismic

Empty System transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-O6

Examination extent of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-24, 5-18, 11-01 in-process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14, 11-15 liquid pentrant . . . . . . . . . . . see Liquid Pentrant Examination progressive . . . . . . . . . . . . . . . . . .see Progressive Examination radiogFaphic . . . . . . . . . . . . . . . . . . see Radiographic Examination random ........................... 1-27, 1-45, 1-62, 2-12,

records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I1 -1 1 required.. . . . . . . . . . . . . . . . . . . .l-24, 1-60, 6-04, 11-14, 11-15 severe cyclic conditions ...................... .lo-17, 11-14 spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62 visual . . . . . . . . . . . . . . . . . . . . . . . see visual examination

. . . .see ultrasonic examination

2-32, 4-1 2, 11-1 5

Exclusions for compressors and internal piping .................... . l-8 for interconnecting piping . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19 listed in xope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-5

Expansion Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-1 6, 12-23

Extruded Outlet pressure design o f . . ........................... .l-21, 1-70 tees considered as ................................. .1-55

Extruded Welded Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-O1

Fillet Weld internal, slipon flange .............................. .8-27 pressure containing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-13 size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Fittings

conforming to two grades ........................... .8-18 flared, flareless, or

compression types .......................... .3-6, 12-1 6 MSS SP-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

616.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7, 3-01

Flammable Service ................................. 1-1 7

Flanges assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5 design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-67, 3-4, 9-7 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1 O long welding neck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-O5 slip-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12, 8-27 use of aluminum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-51 use of raised and flat face metallic .................... .9-O7

(f)


KO. -

Flexibility Analysis branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-O1 exemptions from . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -33


diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-56 for a tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-55, 1-36, 5-01 for components not listed

in Appendix D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-35, 2-24

Flexibility Factors basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 for B16.9 tees.. . . . . . . . . . . . . . . . . . . . . . . . . . l-7, 12-08, 12-17 for fabricated intersections . . . . . . . . . . . . . . . . . . . l-6, 4-1 6, 5-1 5 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-6


onset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Hardness limitations on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 records ........................................... 8-22

Heat Treatment cooling rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . for austenitic stainless steel . . . . . . . . . . . . . . . . . . . . . . . for bending and forming . . . . . . . . . . . . . for flared laps ......................

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

requirements . . . . . . . .8-08. 8-21, 8-23, SP-1 through SP-5 . . . . when radiography is

required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64, 2-4


Cumulative Index - B31.3 Interpretations Vols. 1-1 2



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No.

Imperfections (see also Acceptance Criteria) concave root surface . . . . . . . . . . . . . . . . . . . . . . . . . . .1. 1. 6-04 determination of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.32

porosity . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9. 5.13. 5.16. 5-20

tungsten inclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9. 5-1 7 undercutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.14. 2.8. 6-04

lack Of fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.09

slag inclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20


Instrument Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.07. 8-01

Internai Piping, Equipment . . . . . . . . . . . . . . . . . . . . . . . . . l-8

Joint FactOK ior ASTM A 234.

for branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.06 for circumierential welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-42 for longitudinal and spiral

welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.78. 3-1 1. 8-06

ASTM A 312. ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . 2.20

Joints circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.11 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . .2.6. 3-10 instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.07 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13 threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.16

Lateral Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Leak Tests acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2 alternative . . . . . . . . . . .4.0 9. 5.07. 6.08. 8-1 5. 12.01. 12-21 as nondestructive examination ......................... 8.31 for Category D fluid service . . . . . . . . . . . . . . . . . . . . . . . 1-36 for system designed for O psi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

isolation of test pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 minimum hydrostatic test

pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23. 4-04 minor repairs and additions . . . . . .................... 1-2 of discharge piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-72 of newly constructed

systems . . . . . . . . . . . . . . . . . . . . . . . . . . . l-4, 5.02. 5-22. 8-1 5 of piping and vessel . . . . . . . . . . . . . . . . . . . . . . . . . of piping connecting

equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 of replacement piping . . . . . . . . . . . . . . . . . . . . . . . . .5-22. 12-21 painting before test . . . . . . . . . . . . . . . . . . . . . . . . .2.6. 3-10, 5-23 personnel qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31 pneumatic test . . . . . . . . . . . . . . . . . . . . . . .11-07. 11-19. 12-02 preparation for . . . . . . . . . . . . . . .2-6, 3-1 O, 5-02, 5-23. 12-03 reduced pressure

(hydrostatic test) . . . . . . . . . . . . . . . . . . . . . requirements . . . . . . . . . . . . . . . . . . . . . . . . . sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 temperature correction for . . . . . . . . . . . . . . . . . . test fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l 2-19 test pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.04


NO . lethal Substance .................................. . l-73

limitations on imperfections ......................... see imperfections on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 on tubing size . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . .2-13, 3-6

Liquid Penetrant Examination requirements ..................................... . l 1.14

Low Temperature Requirements ........................ .see Impact Tests

Materials API 5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.78. 2.4. 3.9. 3-1 1.

6.01. 6-06 . . . . . . . . . . . . . . . . . 2.4. 11-05

. . . . . . . . . . . . . . . . . 2-20 ASTM A 312 . . . . . . . . . . . . . . . . . . . . . . l -29, 1.77. 2-20 ASTM A 351 ..................................... 11-13 ASTM A 387 . . . . . . . . . . . . . . . ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-77. 2-20 ASTM A 487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-07 ASTM A 537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ASTM A 570 . . . . . . . . . . . . . . . . . . . 1-38

. . . . . . . . 1-13 ASTM A 587 . . . . . . . . . . . . . . . ASTM A 633 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 ASTM A 658 ....................................... 3-8 ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . 1-48 ASTM B 241 ....................................... 2-19 ASTM B 337 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 ASTM B 464 . . . . . . . . . . . . austenitic stainless steels . . . . . . . . . . . . . . . . . . . . . 3-13 bases for design stresses . . . . . . . . . . . . . . . . . . . .1 1-03 certiiication . . . . . . . . . . . . .5-1 O. 8-02 conforming to two grades ...................... .8-18, 8-34

...................... 2-22 reidentification ..................................... 8-19 toughness requirements .............................. 5-19 unlisted material . . . . . . . . . . . . . . . .l l-05, 11-20

. . . . . . . . . . . . . .

. . . .

Miter Bends pressure design of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.22. 5-11


explanation oí . .................................... 1.33 Runs

Nomenclature d ................................................ 1-54 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 t" ................................................ 1-75 T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.04. 5-16 .

Nonmetallic Piping fluid service requirements ..................... 1 1-1 7. 1 1-1 8 in Category M Fluid Service .......................... 8.35 joint requirements ............................. .7.09. 8-14

Notch Sensitive materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22




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ASME B33.3aINT N O - * 3 2 ** M O757670 0542378 382 M ' .___ .

Interpretation No . _.

Subiect

Occasional Variations (pressure/temperature allowances) . . . . . . . . l-3, 2-1 4. 4-1 1

loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.50. 2.15. 2.16. 2-17

Owner responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.26. 2-30. 5-22

Owner's Inspector qualifications of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 1 responsibilities of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.26

Pipe elbowless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-03 in corroded condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.15 made trom plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.48. 8-36 of noncircular cross section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 pressure testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.09 spiral welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.03 straight. under internal pressure . . . . . . . . . . . . . . . . .10.20, 11-21

Pipe Supports configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.07 longitudinal stress effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.05 use of plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-49


Pneumatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Tests

Positions qualification of welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-66



Pressure Design for elevated temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 in the high pressure range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.68 of extruded headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-21, 1-70 of flanges and blanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 0.14 of miter bends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

1.70. 2-1 1 . 11-21 of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-04

of pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.42. 1.54, 1.57. 1.68.

Pressure Rating valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-04 variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.11

Pressure Relief Devices acceptable devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.21. 2-29 and test pressure . . . . . . . . . . . . . . . . . . . . . .l l-07, 1 1-1 9. 12-04 setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-32, 7.01. 12-04 stop valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l 0.1 O. 12-1 8

Pressure Surges loads dueto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-50


Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Test


No.

Progressive Examination . . . . . . . . . . . . . 1.5. 1.62. 3.5. 10.09 . 10.10. 10-12 11.02. 11-04

Published Specification . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15


a% supplementary examination . . . . . . . . . . . . . . . . . . . . . . . . . 8.38 random radiography . . . . . . . . . . . . . . . . . 1.27, 1.45, 1.62. 2.12.

records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 requirements . . . . . . . . . . . . . . . . . . . . .6.04. 11.01. 11.05. 12-03 selection of welds for

examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 spot radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.67. 3-12 when PWHT 15 required . 1.64. 2-4

100% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09

2.32. 3-12

Records certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 O. 8.02. 10-03 of examinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -1 1 of hardness tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22 for radiographic examination . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 retention of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 0

Reinforcement. Branch attachment weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.03. 7-08 clarification of terms . . . . . . . . . . . . . . . . . . . . . . . . . . .1.37. 11-10 limits of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.27. 9-04

Repairs to welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.18

Responsibility designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11 rights of owner's inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 10.03

Safeguarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12



Severe Cyclic Conditions cyclic loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12 large rapid temperature change . . . . . . . . . . . . . . . . . . . . . . . . 8.09 spiral welded pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.03

Simplified Flexibility Analysis ....................... . l -33

Standard Components manufacturers markings . . . . . . . . . . . . . . . . . . . . . . . . . .3.7. 8-03 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.0 5. 8.04. 8-07

Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10 superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.44

Stresses (see also

displacement stress range . . . . . . . . . . . . . . . . . . . . . . .7.04. 12-06 due to cold bpring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16 due to occasional loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.16

Allowable Stresses)

. .

ih) Cumulative index . B31.3 Interpretations Vols . 1-12



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... ~~


due to pressure surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 due to seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17 due to thermal gradients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 longitudinal . . . . . . . . . . . . . . . . . . . 1.20, 1.50 . 2.15. 2.24. 4.10 .

4-1 2. 6-03R IVOI . 7) . 6.07. 7.05. 8-1 6

Stress intensification Factors

basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 ior 816.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 ior fabricated intersections ....................... . l-6, 5-1 5 for tees . . . . . . . . . . . . . . . .1.46. 1.55. 1.71. 5.01 . 12.08. 12-17 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6. 12-1 1

dpplication of . . . . . . . . . . . . . . . . . . . .1.34. 2.24. 6-03R (Vol . 7)

Temperature design minimum temperature . . . . . . . . . . . . . . . . . . . . . . . .1 0.02 large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.13. 5-14 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Thermoplastic piping solvent cemented joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 0.8 specific requirements .............................. .1 0.06

Tubing joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 iimitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.13. 3-6

Thickness Allowances in stress calculations . . . . . . . 1-20

Ultrasonic Examination in place of radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.05 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 0.1 7

Unlisted components . . . . . . . . . . . . . . . 1.6. 1.51. 3.6. 4.05 . 5.05. 8.7.

materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Materials 10.18. 10.11 . 10.07. 12-09

Subiect

Valves Category bi Fluid Service . . . . . . . . . . . . . materials ........................... pressure build up .................... ratings .............................

Visual Examination internal . . . . . . . . . . . . . . . . . . . . . . . . . . requirements ........................

Washers. Use of ....................

Weld bevels ............................. examination of welds . . . . . . . . . . . . . . . . . fillet size ...........................

interpretation No.

. . . . . . . . . . . . . 8.33

. . . . . . . . . . . . . . 8.07

. . . . . . . . . . . . . . 8.04

. . . . . . . . . . . . . . 5.03

. . . . . . . . .8.1 O. 8-26

. . . . . . . .2.2 8. 10-03

7-j . . . . . . . . . . . . . . . -

. . . . . . . . . . . . . l 2.1 0

.10.1 5. 11.01, 11-11 . . . . . . . . .1.74. 10-19

for branch connections . . . . . . . . .2.1 O. 4.03 . -1.14 . 8.37. 11-10 imperfections . . . . . . . . . . . . . . . . . . see Acceptance Criteria longitudinal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2 O. of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . qualiíication of position . . . . . . . . . . . . . . . . . . . . . reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.0 8. 11 -08 repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

........................ 6.02. 6 spacing of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-02

Welding Procedure qualification of .1.12. 1.65. 1.66. 1.76. 4-1 7. 8.23. 8.29. 1 1-09 responsibility ............................... .12.07. 12-1 2 specification ................................. .8.21. 8-27


. Copyright ASME International Provided by IHS under license with ASME Licensee=Bogazici University/5964815002, User=ahmadi, rozita


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ASME B 3 1 - 3 A 9 3 m 0759670 0534835 4 5 1 W

ASME B31.3



General Information






Code Reference and Subject Indexes have been prepared to assist the user in locating interpretations by location or by subject matter in the Code. They cover interpretations issued from Volume 1 up to and including the present volume, and will be updated with each volume. O

121



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ASME B31.3A 9 3 m 0759b70 0534836 378 m

B31.3

Subjcct Interpretation . . . . . . . . . . . . 11-05

Para . 304.3.3 and Appendix H. Rcinforcement of Welded Branch Connections . . . . . . . . . . . . 11-10 Paras . 306.4.2 and 332.4.2, Heat Treatment for Flared Laps ............................. 11-03 Para . 323.1.2, Unlisted Materials .................................. Para . 323.3.2 and Table 323.3.1, Impact Tcsting and Acceptance Criteri . . . . . . . . . . . . . . . 11-12 Para . 328.2, Welding Qualification . . . . . ....................... 11-09 Para . 331.1.3, Heat Treatment - Gover ....................... 11-06

Para . 302.3.2(f), Bases for Design Stresses - Unlisted Materials . . . .

Para . 341.3.4, Progrcssive Examination ............................................... 11-04 Para . 341.3.4(a), Progressive Examination ............................................. 11-02 Para . 341.4, Extent of Requircd Examination ......................................... 11-01

11-11 Para . 341.4.1 and Table 341.3.2A, Examinat

Cri teria ............................ ........................................ 11-14 Para . 341.4.1, Examination Normally Requ ........................................ 11-15 Para . 345.5, Pncumatic Leak Testing ................................................. 11-07

11-19 Para . A305. Fluid Scrvicc Requiremcnts for Nonmetallic Piping

Paras . 341.4.1, 344.2.2 and 344.7.1, Records of Examinations ............................ Normally Required and Acceptance

Para . 345.5.2, Pncumatic Lcak Testing - Pressure Relief Device ........................

Components - Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-17

Specific Rcquircnie ................................... 11-18 remcnts for Nonmetallic Materials -

Para . K304.1.2, Eqs . ( Undcr Internal Pre .................................................. 11-21

I C Threaded Componcnts ...................... 11-16 11-08

. . . . . . . . . . 11-13

O Tablc 341.3.2a, Weid Reinforcemcnt ................................................. Tablc A.1. Basic Allowable Strcsscs in Tcnsion For Mctals . . . . . . . . . .

File No . B31-92-002 B31-92-014 B31-91-052 B31-92-059 B 3 1 6 1-92-0 B31-92-013 B3 1-92-004 B31-91-053 B31-91-050 B31-91-034 B31-92-015

B31-92-020 B31-92-021 B3 1-92-005 B31-92-050

B31-92-030

B 3 1 1-92-03

B3 1-92-060 B31-92-029 B3 1-91 -05 1 B31-92-018

123



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ASME B31-3A 93 O759670 053‘4837 22‘4



Subject:


ASME/ANSI B31.3-1987 Edition, Para. 341.4, Extent of Required Examination

File: B31-91-034

Question (1): In accordance with ASME/ANSI B31.3-1987 Edition, para. 341.4, when applied to the radiography of welds, what areas, in addition to the weld, are to be included in the “area of interest’’ for interpretation and evaluation?

Reply (1): The Code does not specifically define “area of interest.”

Question (2): Does the term “weld” include the base metal heat affected zone adjacent to the weld deposit when applied to radiography?

Reply (2): No. See the definition for “weld” in para. 300.2.


Subject: ASME/ANSI B31.3-1987 Edition, Para. 341.3.4(a), Progressive Examination


File: B3 1-9 1-050

Question: In accordance with ASME/ANSI B31.3-1987 Edition, para. 341.3.4(a), how far back in time should one go searching for additional joints to examine to meet the requirements of progressive examination?

Reply: Time is not a factor. Only piping in the “lot” under examination shall be considered for progressive examination. See paras. 341.3.4 and 344.1.3.


Subject: ASME B31.3-1990 Edition, Paras. 306.4.2 and 332.4.2, Heat Treatment for Flared Laps

O Date Issued: May 22, 1992

File: B31-91-052

Question: In accordance with ASME B31.3-1990 Edition, paras. 306.4.2 and 332.4.2, does a flared lap on a P-No. 1 material made at ambient temperatures and exhibiting a calculated maximum fiber elongation greater than 50% of the specified basic minimum for thegrade of steel used, require heat treatment under para. 332.4.2(a)?

Reply: Yes, except as excluded by para. 332.4.2(a).

125



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ASME B3l1-3A 93 m 0757670 0539838 LbO m

11-04 831.3 Interpretations No. 11


Subject: ASME B31.3-1990 Edition, Para. 341.3.4, Progressive Examination


File: B3 1-91-053

Question: In accordance with ASME B31.3-1990 Edition, para. 341.3.4, if a reject is found at the second step [para. 341.3.4(c)] of progressive examination, is it required that every weld made by the same welder since the beginning of the job be examined?

Reply: No. The progressive examination applies only to the particular lot of piping represented by the original examination.

126



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ASME B3L=3A 9 3 0759670 0534839 U T 7

B31.3 Interpretations No. 11 11 -05


Subject: ASME B31.3-1990 Edition, Para. 302.3.2(0, Bases for Design Stresses - Unlisted Materials


File: B31-92-002

Question (1): Does ASME B31.3-1990 Edition provide the basis for determining average expected yield or tensile strength of unlisted materials referred to in para. 302.3.2(f)?

Reply (1): No.

Question (2): Does ASME B31.3 allow the use of API 5LX52 above 400"F?

Reply (2): No, see Note (55) to Table A-l.

Question (3): Does this limitation still apply even if the yield (tensile) strength is defined above this temperature?

Reply (3): Yes; however, unlisted materiais may be used above 400°F if qualified per para. 323.1.2.

Question (4): Does B31.3 provide for improving longitudinal weld joint factors through the use of ultrasonic or eddy current testing?

Reply (4): No. See Table 302.3.4.

Question (5): May ultrasonic examination be substituted for radiography to attain Code required weld joint quality factor for welded fittings?

Reply (5 ) : No.

Question ( 6 ) : Does B31.3 provide for a 0.95 weld joint quality factor for the longitudinal (including spiral) welds in pipe that is 100% ultrasonically or eddy current tested and radiographed on each end?

Reply (6): No, except as specified for certain API 5L pipe in Item 4b of Table 302.3.4.

127



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11-06, 11-07

ASME B 3 1 . 3 A 93 0759b70 0 5 3 4 8 4 0 819



Subject: ASME B31.3-1990 Edition, Para. 331.1.3, Heat Treatment - Governing Thickness


File: B31-92-004

Question: In accordance with ASME B31.3-1990 Edition, para. 331.1.3, is PWHT required when the header thickness is greater than the limiting thickness shown in Table 331.1.1 but the computed thickness through the weld is less than two times the limiting thickness shown in Table 331.1.1?

Reply: No. See Interpretation 5-06.


Subject: ASME B31.3-1990 Edition, Para. 345.5, Pneumatic Leak Testing


File: B3 1-92-005

Question (1): In accordance with ASME B31.3-1990 Edition, para. 345.5, is the minimum pneumatic test pressure considered to be the design pressure?


Question (2): In accordance with para. 345.5.4, is the 110% of design pressure considered to be the minimum or maximum pneumatic test pressure?

Reply (2): The Code defines “test pressure” and does not specifically address minimum or maximum pneumatic test pressure.

Question (3): In accordance with para. 345.5.2, is the set pressure of the relief device considered to be the maximum pneumatic pressure?

Reply (3): No.

128



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ASME B31.3A 93 0757670 0534843 755



Subject: B31.3-1990 Edition, Table 341.3.2A, Weld Reinforcement

Date Issued: November 25. 1992

File: B31-91-051

Question (1): In accordance with ASME B31.3-1990 Edition, Table 341.3.2A, what is the minimum height of external weld reinforcement allowed by the Code?

Reply (i): Zero.

Question (2): Is a weld exhibiting concavity on the outside surface acceptable?

Reply (2): The Code does not address external weld concavity, but the total weld thickness must be equal to or greater than T,, as defined in Note (6) to Table 341.3.2A.


Subject: ASME B31.3-1990 Edition, Para. 328.2, Welding Qualification


File: B31-92-013

Question: In accordance with ASME B31.3-1990 Edition, para. 328.2, may a contractor use a welding procedure specification written by others provided that he produces a supporting procedure qualification made by his own organization?

Reply: Yes, see para. 328.2.2

interpretation: l i -10

Subject: ASME B31.3-1990 Edition, Para. 304.3.3 and Appendix H, Reinforcement of Welded Branch Connections


File: B31-92-014

Question: In accordance with ASME B31.3-1990 Edition, para. 304.3;3, may the groove weld attaching an integrally reinforced branch connection fitting to the run pipe be less than fully penetrated, if the depth of the groove is greater than required for adequate branch reinforcement?

Reply: No. See para. 328.5.4(d).

129



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11-11, 11-12, 11-13

ASME B31.3A 9 3 0759b70 0534842 691



Subject: ASME B31.3-1990 Edition, Paras. 341.4.1, 344.2.2, and 344.7.1, Records of Exam- inations


File: B31-92-015

Question: In accordance with ASME B31.3-1990 Edition, paras. 341.4.1, 344.2.2, and 344.7.1, are records for individual in-process examinations required only when used as a substitute for radiographic/ultrasonic examinations in accordance with para. 341.4.1(b)?

Reply: In-process examinations, when used in accordance with para. 341.4.1(b) as a substitute for radiographic/ultrasonic examinations, must be documented in accordance with para. 344.2.2. When in-process examination in accordance with para. 344.7, as opposed to visual examination under para. 341.4.1(a), is specified by the engineering design as the type of examination for any other purpose, documentation is also required. Documentation is not required for visual examinations performed in accordance with para. 341.4.1(a).


Subject: ASME B31.3-1990 Edition, Para. 323.3.2 and Table 323.3.1, Impact Testing and Acceptance Criteria


File: B31-92-016

Question: In accordance with ASME B31.3-1990 Edition, when impact testing the weld and HAZ to the requirements of Table 323.2.2, can the base material be represented by any base material within the same P-Number group?

Reply: Yes, provided the requirements for filler metal and flux are in accordance with Table 323.3.1, BOX A-4.


Subject: ASME B31.3-1990 Edition, Table A-1, Basic Allowable Stresses in Tension for Metals


File: B3 1-92-01 8

Question: According to ASME B31.3-1990 Edition, what rules are used to develop allowable stresses for ASTM A 351 CN7M for usage over 100"F?

Reply: The requirements of paras. 323.2.1 and 323.2.4 apply.

130



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ASME B31.3A 93 0759670 0 5 3 4 8 4 3 528 W



Subject: ASME B31.3-1990 Edition, Para. 341.4.1 and Table 341.3.2A, Examination Nor- mally Required and Acceptance Criteria


File: B3 1-92-020

Question: In accordance with ASME B31.3-1990 Edition, para. 341.4.1, if a weld for severe cyclic service has been accepted under visual examination and later shows surface porosity under a subsequent liquid penetrant examination, is the weld acceptable in accordance with Table 341.3.2A?

Reply: Yes.


Subject: ASME B31.3-1990 Edition, Para. 341.4.1, Examination Normally Required


File: B31-92-021

Question: In accordance with ASME B31.3-1990 Edition, para. 341.4.1, for a normal fluid service, does para. 341.4.1(b)(l) permit the in-process examination option for the 5% random examination requirement?

Reply: Yes, if specified in the engineering design.


Subject: ASME B31.3-1990 Edition, Table 314.2.1, Minimum Thickness of Male Threaded Components


File: B31-92-029

Question: In accordance with ASME B31.3-1990 Edition, Table 314.2.1, does the Fluid Service Limitation (the first column of the Table) shown as “None” mean “All fluid services”?

Reply: Yes.

-131



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ASME B31-3A 93 m 0759670 0534844 464 m



Subject: ASME B31.3-1990 Edition, Para. A305, Fluid Service Requirements for Nonme- tallic Piping Components - Pipe


File: B31-92-030

Question: Does ASME B31-3-1990 Edition, para. A305, allow the use of thermoplastics and RTR piping in flammable fluid service?

Reply: Yes, subject to the fluid service limitations of the pressure containing material. See para. A323.4.2.


Subject: ASME B31,3-1990 Edition, Para. A323.4.2(c), Fluid Service Requirement for Non- metallic Materials - Specific Requirements


File: B31-92-031

O Question: Does ASME B31.3-1990 Edition, para. A323.4.2(c), allow the use of reinforced thermosetting resin piping in flammable fluid service?

Reply: Yes.

132



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A S I E B3l1-3A 93 m 0759670 0534845 3T0 m



11-19,11-20,11-21

Subject: ASME B31.3-1990 Edition, Para. 345.5.2, Pneumatic Leak Testing - Pressure Re- lief Device


File: B3 1-92-050

Question (1): In accordance with ASME B31.3-1990 Edition, para. 345.5.2, is it permissible for the engineering design to specify a higher pneumatic test pressure for a piping system than is required by para. 345.5.4?

Reply (1): Yes.

Question (2): Is the engineering design specification of a higher test pressure subject to the limitations of para. 345.5.2?

Reply (2): Yes.

Question (3): May a pressure regulator be employed as a substitute for the pressure relief device required by para. 345.5.2?

Reply (3): No.


Subject:


ASME B31.3-1990 Edition, Para. 323.1.2, Unlisted Materiais

File: B31-92-059

Question: In accordance with ASME B31.3-1990 Edition, may micro-alloyed carbon steel bars not listed in Appendix A-1 be used for piping components in B31.3 piping systems?

Reply: Yes. See the requirements of para. 323.1.2.


Subject: ASME B31.3-1990 Edition, Para. K304.1.2, Eqs. (34a), (34b), (35a), and (35b), Straight Pipe Under Internal Pressure


File: B31-92-060

Question: In accordance with ASME B31.3-1990 Edition, is the 1.155 factor used in the formulas in para. K304.1.2 technically correct?

Reply: Yes, see para. K304.1.2 footnote (4) and K302.3.2(b)(l). 133



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ASME B31-3A 9 3 0759b70 0534846 237

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 831.3-1990 Edition. References in brackets are to



No. -

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . l -3, 1-6, 1-7 300 . . . . . . . . . . . . . . . 7-1 O, 8-1 7 300(b) -09, 10-1 1 . . . . . . . . . . . . . . . . . . 300(~) . . . . . . . . . . . . . 3-2, 3-4, 4-10, 6-03R (Vol. 71, 7-05, 8-30 300W [300(e)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-3, 1-6, 1-7

300.1.1 . . . . . . . . .l-47, 1-52, 2-26, 3-1, 4-19, 6-01, 8-01, 9-02 Fig. 300.1.1 . . . . . . . . . . . . . . . . . . . .1-8, 1-19, 2-26, 7-10, 8-17 300.1.3 [300.1.4] . . . . . . . . . . . . . . . . . l -8, 1-16, 1-19, 1-26, 3-2

300.2

300.1 7-1 O, 8-1 7, 9-06

300.1.3(d) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .lo-O5

Category D Fluid Service . . . . . . . . . . . . . . . . .4-13, 5-03, 6-01 Category M Fluid Service . . . . . .l-40, 1-73, 6-01, 8-09, 9-02 notch-sensitive owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 piping components

severe cyclic conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

301.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

301.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 301.5.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-07 301.7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 302 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 302.2 1-50 302.2.4 [302.2.3] . . . . . . . . . . . . . . . . . . . . . 1-3, 1-32, 2-14, 3-4,

4-1 1, 7-01, 7-04, 8-04 302.3.2 . . . . . . . . . . . . . . . . .l-18, 1-38, 2-16, 3-13, 8-25, 11-05 302.3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 Table 302.3.4 .l-42, 1-78, 2-20, 3-11

O . . . . . . . . . . . . . . . . . . . . . .

302.3.5 . . . . . . . . . . . . . . . . . . 1-20, 1-50, 2-14, 2-15, 2-24, 3-4, 4-10, 4-12, 6-03R (Vol. 7), 6-07, 7-04,

7-05, 8-16 302.3.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-50, 2-15, 2-16, 2-1 7 302.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

. . . . . . . . . . . . . . . . . . . . . . . . . . 6-05

. . . . . . . . . . . . . . . .l-42, 1-54, 1-70 1-42, 1-57, 1-68, 1-70, 2-1 1, 10-20 . . . . . . . . . . . . . . . . . . . . . 1-22, 5-11

Fig. 304.2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22 304.3 . . . . . . . . . . . . . . . . . . 1-21, 1-46, 5-01, 6-09 304.3.2 . . 4-05 304.3.3 . . . . . . . . . . . . . . . . . . . . . .4-03, 7-02, 8-06, 8-37, 11-10 O


No. -

. . . . . . . . . . . . . .8-3 7 -37, 1-55, 1-75, 2-27 304.3.4 .......................

Fig. 304.3.4 . . . . . . . . . . . . . . . . . 1-70

304.5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

304.7.2 . . . . . . . . . . . . 1-51, 3-2, 4-05, 5-05, 5-11, 6-09, 10-07, 10-11 10-18

304.7.4 . . . . . . . . . 305.2 . . . . . . . . . . .

306.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

. . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

315.3,. . . . . . . . . . . . . . . . . . . . 317.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 318 . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-13

. . . . . . . . . . . . . . . . . . . . . . . . . 2-17

319.3.6 1-6, 1-7, 1-55, 2-24, 5-15 . . . . . . . . . . . . . .

319.4.4 . . . . . . . . . . . . . . . . . . .

321.1.4 . . . . . . . . . . . . . . . . . . . . . 1-49 322.6.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

323.1.1 . . . . . . . . . . . . . . . . . . . . . . . . .8-19

. . . . . . . . . . . . . . . . . . . . . . . 3-9 323.2.1 . . . . . . . . . . . . . . . . . . . . . . . . Table 323.2.2

. . . . . 1-12, 1-48, 1-65, 1-76, 2-19, 3-8, 4-01, 4-15

323.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

323.3.2 . . . . . . . . . . . . . . . . . . . . . . . .11-12

Cumulative Index - 831.3 Interpretations Vols. 1-1 1 ia)



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Code Reference

ASME B3Lm3A


Table 323.3.1 [Table 323.2.21 . . . . . . . . . 1-12, 1.76, 4.17, 5.19. 5.21. 8.29.

10.2. 11-12

................................ 2-9 323.3.4 .....................

328 . . . . . . . . . . . . . . . . . . . . . . .

328.5 [327.4] ...

Fig . 328.5.2 [Fig .

330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23

331.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.08. 9-05 Table 331.1.1

[Table 331.3.11 . . . . . . . . . . . . . . . .1.69. 2.2. 5.06. 8.24. 9-03 331.1.2 . . . . . ... . . . . . . . . . . 8.05

1.39. 1.59. 4.06. 5.06. 9.03. 11-06 331.1.4 [331.1.2]. . . . . . . . . . . . . . . . . . . . 331.1.6 [331.3.4] ................................... 5.08

..................... .1.78. 8-22

..................... .1.39. 1-78

...................... 8-05 ........................... 8-03 . . . . . . . . . . . .1.23. 1.53. 4.02. 8-20

332.4 [329.3, 330.21 ................................. 2.2 332.4.2 ................................

........................

. . . . . . . . . . . . . . . . . .

............................. 1.26 340.3 1336.31 ............................... .1.10. 10-03 340.4 [336.2] ................................

......................... 341.2 [336.1.1, 336.1.31 . . . . . . . .1.10. 1.26. 1.27. 2.28. 10-03 341.3.1 [336.5] ............................... .1.64. 2-4 341.3.2 . . . . . . . . . . . . . . . . . . . . . . 8-32 Fig . 341 . . . . . . . . . . . . . . . . . . . . . . . 5-09 Table 341.3.2A

[Table 327.4.1Al . . . . . . . . . . 1.1. 1.9. 1.14. 1.41. 2.8. 5.04. 5.13. 5.16. 5.17. 5.18. 5.20. 6.04.

7.06. 8.32. 8.38. 9.04. 11.08. 11-14 Table 341.3.28 [Table 327.4.1BI . . . . . . . . . . . . . . . . .5.18. 6-04 341.3.4 [336.5, 336.5.41 . . 1.62. 2.25. 2.32. 3.5. 3.14.

10.09. 10-1 2. 11.02. 11 -04 341.4 [336.5] . . . . . . . . . . . . . . . . .1.24. 1.45. 3.12. 5.20. 11-01 341.4.1 [336.5.1]. . . . . . . . . . . . . . 1.10. 1.26. 1.27. 1.60. 2.12.

2.28. 3.7. 3.12. 4.12. 5.10. 8.02. 8.10. 8.26. 10.03. 10.17.

11.11. 11.14. 11-15 341.4.2 ................................

341.5 . . . . . . . . . .


No.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O 341.5.1 [336.6.1] .1.5, 3-12 342.1 [336.4.1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.28 343 [336.4.1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 344 [336.4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-09 344.2 [336.4.2] . . . . . . . . . . . . . . . . . . . .2-28, 8-10, 8-26, 11-1 1

1-10, 1.60, 2-12

345.2.6 [337.1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.2, 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345.3 [337.3] .2.6, 3.10, 5-02 345.4 8-04 345.4.2 [337.4.1] . . . . . . . . . .1.35, 1.61, 1.63, 2.23, 4.04, 9-09 345.4.3 [337.4.2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.63 345.5 [337.4.4] . . . . . . . . . . . . . . . . . . . .1.35, 1.43, 6.08, 11-07 345.5.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-19 345.7 [337.5.2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.36

A323.4.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10.06, 11-18 A327.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-09

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e A328.2(a) . 1 0.8

. . . . . . . . . 2.13

. . . . . .1.24, 1-45

M345.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 . . 9.02 . . 9.02

. . . . . . . . . . . . . . . . . . . . . . . . . 8-35

(No equivalent) [ ( i 4)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.20 Note (1 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.18 Note (20) [(30)] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-77 . Note (57) [(2)1 1-58

Appendix A Table A-1 [Table 11 . . . . . . . . . . 1.13, 1.18, 1.29, 1.38, 1.48,

1.77, 2.1, 3.8, 3.9, 3.13, 4.12, 4-1 3, 6.01, 6.06, 7.03, 8-1 1,

8.18, 8.25, 8.34, 8.36, 11-13 Table A-1 B [Table 11 . . . . . . . . . . . . . . . l -78, 2.20, 4-1 8, 7-03

Appendix 0 .................... 1.6, 1.7, 1.34, 1.46, 1.55, 1.56, 1.71, 2.7, 2.24, 4.16,

Appendix E [Appendix KI . . . . . . . . . . . . . . . . . 5.01. 5.15. 6-06 . . . . . .1.44. 5-10

íb) Cumulative index . 631.3 Interpretations Vols . 1-1 1



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ASME 831-3A 93 H 0759670 0534848 O O T


No.

Appendix F [F323.2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-29 Appendix C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 Appendix H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.06, 1 1-1 O Appendix J . . . . . . . . . . . . . . . . . . . . . . . . . l-28, 1.54, 1.75. 5-04 Appendix M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.01. 8-09 Case 137 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Case 141 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51




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ASME B31-3A 73 0757670 0534847 T4b

Subject

Acceptance Criteria pressure tests . . . . . . . . . . . . . . . . . . . . weld ...................... 1.1, 1

5.13. 5.17. 5-1

SUBJECT


. . . . . . . . . . . . . . . . . . . 1-2 .9. 1-1 4. 1.41. 2.8. 5.09. 8. 5.20. 6.04. 7.06. 8-32

Allowable Stresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 bases for .................... .l-18, 3-13, 8.11. 8.25. 10-13 for ASTM A 312 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 for ASTM A 351 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13 for ASTM A 387 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25 for ASTM A 570 . . . . . . . . . . . . . . . . . for ASTM A 587 . . . . . . . . . . . . . . . . . for ASTM A 671 . . . . . . . . . . . . . . . . . for ASTM B 464 . . . . . . . . . . . . . . . . . for austenitic stainless steels . . . . . . . .

Alternative Tests for Category 0 fluid service . . . . . . . requirements .................... sensitive leak test . . . . . . . . . . . . . . . .

Authorized Inspector . . . . . .

Bending . . . . . . . . . . . . .

Bends corrugated ...................... miter . . . . . . . . . . . . . . . . . . . . . . . . . . reduction of outside diameter . . . . . .

. . .

. . .

. . . . . . . . . . . . . . . . 1-38

. . . . . . . . . . . . . . . . 1-13

. . . . . . . . . . . . . . . . 1-48

. . . . . . . . . . . . . . . . 8-11

. . . . . . . . . . . . . . . . 3.13

. . . . . . . . . . . . . . . . 1-36

. . . . . . . . . . . . . . . . 8-15

. . . . . . . . . . . . . . . . 1-25

. see Owner's Inspector

. . . . . . . . . . .4.02. 8-03

. . . . . . . . . . . . . . . . 1-23

. . . . . . see Miter Bends

. . . . . . . . . . . . . . . . 8-20

. . . . . . . . . . . . . . .

. . . . . . . . . . . 7-09

Bonding Qualification Test hot gas welded . . . . . . . . . . . . . . . . . . minimum burst pressure . . . . . . . . . . . . . . procedure specifications for plastic piping . . . . . . . . . . . . . . solvent cement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bonds

8-14 8-1 4 0-08 8-1 4

heat fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14 hot gas welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-09


Branch Connections extruded outlets . . . . . . . . . . . . . . . . . . . . . . . . . .1.37, 2.27. 6-09 flexibility analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.01 integrally reinforced fitting . . . . . . . . . . . . . . . . . . . . . .4.05, 1 1-1 O projection into run pipe . . . . . . . . . . . . . . . . . . . . . . . . .8.28, 9-03 reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.06, 8-37 weld requirements . . . . . . . .2.10, 4.03, 4.14, 7.02, 7.08, 10-04

INDEX


No.

Brazed Joints for flammable service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Buckles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.23. 1-53

Cast Irons specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0.01

Category D Fluid Service alternative pressure test for . . . . . . . . . . . . . . . . . . . . . . . . . . . l-36 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.13, 5-03 radiographic examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.38

Category M Fluid Service clarification of term . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-73, 9-02 double contained piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35 leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-08 liquid oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-35, 9-02 tubing size limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 "very small quantity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-40

Code Coverage 631.3 versus 631.4 . . . . . . . . . general hydrocarbon service . . . . . . . . . . . . . . . . . . . . . . . . . . 6-01 in-line sensing devices . . . . . . . . . . . . . . 8-01 new and replacement . . . . . . . . 5-22 offshore platform . . . oil heating system . . . synfuel plant piping . tobacco plant piping . . .

Components (see also fittings. flanges. standard components.

certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-26, 3.7. 5-10 design conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 fabricated or flared laps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-03 flexibility characteristic . . . . . . . . . . . . . . . . l-55, 1-56. 2-24. 5-01 in-line sensing devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-01 referenced standards . . . . . . . . . . . . . . . . . . . . . . . . . . . l-44, 5-10

and valves)

Compressors internal piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8

Corrugated Bends. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Cyclic loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12




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ASME B3L-3A 93 0759670 0534850 768



conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Lame theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.57 minium temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.02

Design)

Displacement Stress . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14, 2-24

Earthquake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Seismic

Empty System transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-06

Examination extent of . . . . . . . .1.24. 5.18. 11-01

liquid pentrant . . . . see Liquid Pentrant Examination progressive .................... .see Progressive Examination

2.32. 4.12. 11-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-11

severe cyclic conditions . . . . . . . . . . . . . . . . . . . . . . .1 0.1 7. 11-1 4 spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62

. . . . . . . . . . . . . . . see visual examination

. . . . . . . . . . . . see ultrasonic examination

Exclusions for compressors and internal piping .................... . l-8 for interconnecting piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . i -1 9 listed in scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i 0.5

Expansion Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-1 6

Extruded Outlet pressure design of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -2 1. 1-70 tees considered as . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.55

Extruded Welded Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.01

Fillet Weld internal. slip-on flange ............................... 8.27 pressure containing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13 size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Fittings

conforming to two grades . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.18 flared, flareless. or

compression types ................................. 3.6

B16.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -7 , 5-01

MSS SP-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Flammable Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-1 7

Flanges assembly ........................ (. . . . . . . . . . . . . . . . . . . 2.5 design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.67, 3.4, 9-7 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10 long welding neck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.05 slip-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.12. 8-27


No . - use of aluminum .................................... 1-51 use of raised and flat face metallic ..................... 9-07

Flexibility Analysis branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.01 exemptions from . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-33


diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-56 for a tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.55, 1.56. 5-01 for components not listed

in Appendix 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.55. 2-24

Flexibility Factors basis for . l-56 for 616.9 tees -1-7 for fabricated intersections . . . . . . . . . . . . . . . . . . $1.6. 4-1 6. 5-1 5 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

......................................... ......................................

Fluid Service general hydrocarbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.01 requirements, metallic ............................. . l 1.16 requirements, nonmetallic ..................... 1 1-1 7. 1 1-1 8 responsibility for

categorizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.08. 8-09


onset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

Hardness limitations on ....................................... records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

Heat Treatment cooling rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-69 for austenitic stainless steel . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.65 for bending and forming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 for flared laps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l l-O3

. . . . . . . . . . . . . . . 8.12 governing thickness . . . . . . . . . . . .1.39, 1.59, 4.06. 5.06. 1 1-06 heating rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.69 local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.08, 8-05 monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.08. 8-05 requirements .8.08. 8.21. 8.23. 8.24. 9.03. 9-05 SP-1 through SP-5 8.24 when radiography is

required .................................... .1.64. 2-4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydrostatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . .see Leak Tests

Impact Tests absorbed energy data ................................. 2.9 alternative methods ................................. 8.30

......................... 4.01, 11-12 base metal exclusions ......................... .1.76, 5.14, 8-30 heat treatment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.19 in qualifying procedures .............................. 8.29 of aluminum filler metals . . . . . . . . . . . . . . . . . . . . . . . . . . 2.19 of austenitic stainless steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-65 of bolting materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.15 of the heat affected zone .1.76, 5-21 . . . . . . . . . . . . . . . . . . . . . . .

Cumulative Index . 63 1.3 Interpretations Vols . 1 . 1 1



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ASME B31.3A 93 m 0759b70 0534851 bT4 W


No.

of weldments . . . . . . . . . . . . . . . . . . . . . . .l-12, 1-65, 1-76, 5-21 temperature limitation . . . . . . . . . . . . . . . . . . . . . . . . . .5-14, 8-30 O Imperfections (see also Acceptance Criteria) concave root surface . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1, 6-04 determination of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-32 lack of fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-O9 porosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -9 , 5-13, 5-16, 5-20 slag inclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-20 tungsten inclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9, 5-1 7 undercutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -1 4, 2-8, 6-04


Instrument Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internal Piping, Equipment . . . . . . . . . . . . . . . . . . . .

. / '-07, 8-01

. . . . .1-8

Joint Factors for ASTM A 234,

ASTM A 31 2, ASTM A 403 . . . . . . . . . . . . . . . . . . . . . . . . .2-20 for branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .&O6 for circumferential welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-42 for longitudinal and spiral

welds . . . . . . . . . . . . . . 1-78, 3-1 1, 8-06

Joints circumferential bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11 exposed during test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6, 3-10 instrument tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-O7 special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-13 O threaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16

lateral Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-6

leak Tests acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-2 alternative . . . . . . . . . . . . . . . . . . . . . . . . . .4-09, 5-07, 6-08, 8-1 5 as nondestructive examination . . . . . . . . . . . . . . . . . . . . . . . . .8-31

for system designed for o psi . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -4 minimum hydrostatic test

pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23, 4-04 minor repairs and additions . . . . . . . . . . l -2 of discharge piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-72 of newly constructed

of piping a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 of piping connecting

equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 of replacement piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , 5 2 2 painting before test . . . .2-6, 3-10, 5-23 personnel qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-31 pneumatic test . . . . . . . 11-07, 11-19

for Category D fluid service 1-36

systems 1-4, 5-02, 5-22, 8-15

preparation for 2-6, 3-10, 5-02, 5-23 reduced pressure

(hydrostatic test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . temperature correction for . . . . . . . . . . . . . . . . . . . . . . .

1-61, 2-23 . . . . . l -25 1-35, 1-43


No.

lethal Substance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-73

limitations

on hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 on imperfections . . . . . . . . . . . . . . . . . . . . . . . . . see Imperfections

on tubing size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13, 3-6

Liquid Penetrant Examination requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-1 4

c

low Temperature Requirements . . . . . . . . . . . . . . . . . . . . . . . . . see Impact Tests

Materials API 5 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-78, 2-4, 3-9, 3-11,

6-01, 6-06

ASTM A 234

ASTM A 387 . . . . . . . . . . . . . . . . . . . . . . . .8-25

ASTM A 487 . . . . . . . . . . . . . . ASTM A 537 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASTM A 570 . . . . . . . . . . . ASTM A 587 . . . . . ASTM A 633 . . . . .

. . . . . . . . . 3-8 ASTM A 671 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-48 ASTM B 241 . . . . . . . . . . . . . . . . . . . . . . . . . .2-19 ASTM 8 337 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASTM 8 464 . . . austenitic stainless steels . . . . . . . . . . . . . . . . . . . bases for design stresses . . . . . . . . . . . certification . . . . . . . . . . . . . . . . . . . . . .

notch sensitive . . . . . . . . . . . . . . . . . . . . . 2-22

unlisted material . . . . . . . . . . . . . . . . . . . .

Miter Bends pressure design of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-22, 5-1 1


explanation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 Runs

Nomenclature d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54 T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

T, 5-04, 5-16 t , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75 - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Nonmetallic Piping fluid service requirements . . . . . . . . . . . . . . . . . . . . . l 1-1 7, 1 1-1 8 in Category M Fluid Service . . . . . . . . . . . . . . . . . . . . . . . . . .8-35 joint requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-09, 8-1 4

Notch Sensitive materials .................... .2-22

Cumulative Index - 631.3 Interpretations Vols. 1-1 1



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A S I E B31-3A 93


Occasional Variations (pressure/temperature allowances) . . . . . . . . 1.3. 2- 14. 4-1 1

loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l-50. 2.15. 2.16. 2-17

Owner responsibilities ........................... . l-26, 2.30. 5-22

Owner's Inspector qualifications of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 1 responsibilities of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.26

Pipe elbowless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-03 in corroded condition ............................... 2.15 made from plate .............................. . l-48, 8-36 of noncircular cross section ............................ 3.2 pressure testing ..................................... 9.09 spiral welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.03 straight, under internal pressure . . . . . . . . . . . . . . . . .10.20, 1 1-2 1

Pipe Supports configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-07 longitudinal stress effects ............................. 7-05 use of plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.49






Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ........................... . l-68 of extruded headers ........................... .1.21, 1-70 of flanges and blanks ............................... 10-1 4 of miter bends .................................... . l -2 1 of pipe ............................ 1.42, 1.54, 1.57. 1.68.

of valves .......................................... 8.04 1.70. 2.11. 11-21

Pressure Rating valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-04 variations .......................................... 4.11

Pressure Relief Devices acceptable devices ............................ .2.21. 2-29 and test pressure ........................... .l l -07, 1 1-1 9 setting ...................................... .1.32. 7-01 stop valves ...................................... .1 0.1 O

Pressure Surges loads dueto ....................................... 1-50



0759670 0534852 530


No.

Progressive Examination . . . . . . . . . . . . . 1.5. 1.62. 3.5. 10.09. 10.10. 10-12 11.02. 1 1-04

Published Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.15

Radiographic Examination 100% . . . . . as supplemen random radiography . . . . . . . . . . . . . . . . . 1.27. 1.45. 1.62. 2-1 2.

records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 0 2.32. 3-12

..6.04. 11.01. 11-05

2-25 spot radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-62, 3-12 when PWHT is required . . . . . . . . . . . . . . . . . . . . . . . . .1.64. 2-4

Records certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 O. 8.02. 10-03 of examinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-1 1 of hardness tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.22 for radiographic examination . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 retention of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10

Reinforcement. Branch attachment weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.03. 7-08 clarification of terms .......................... .1.37. 1 1-1 0 limits of ..................................... .2.27. 9-04

Repairs to welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Responsibility designer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11 rights of owner's inspection . . . . . . . . . . . . . . . . . . . . . . . . . . l 0.03

Safeguarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12



Severe Cyclic Conditions

large rapid temperature change ........................ 8-09 spiral welded pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-03

Simplified Flexibility Analysis . . . . . . . . . . . . . . . . . . . . . . . . l-33

cyclic loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Standard Components manufacturers markings ......................... .3.7. 8-02 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-05. 8.04. 8-07

Standards compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < ... 5.1 0 superseded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.44

Stresses (see also

displacement stress range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.04 due to cold spring .................................. 8.16 due to occasional loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.16

Allowable Stresses)

(h) Cumulative Index . 63 1.3 Interpretations Vols . 1 . 1 1



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ASME B31.3A 93 0759670 0534853 473 - Interpretation

No. Subject

due to pressure surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 due to seismic loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17 due to thermal gradients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 longitudinal . . . . . . . . . . . . . . . . . . . 1.20, 1.50, 2-1 5, 2.24, 4-1 O,

4.12, 6-03R (Vol . 71, 6.07. 7.05, 8-16


basis for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56 branch connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 for 816.9 tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 for fabricated intersections . . . . . . . . . . . . . . . . . . . . . . . . l-6, 5-1 5 for tees . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.46, 1.55, 1.71, 5-01 for welded elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -6

application of . . . . . . . . . . . . . . . . . . . . 1.34. 2.24. 6-03R (Vol . 7)

Temperature design minimum temperature . . . . . . . . . . . . . . . . . . . . . . . .i 0-02 large changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-09 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13, 5-1 4 reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Thermoplastic piping solvent cemented joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8 specific requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-06

Tubing joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-07 limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13. 3-6

Thickness Allowances in stress calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.20

Ultrasonic Examination in place of radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-05 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .l 0-17


Unlisted components . . . . . . . . . . . . . . . . 1-6. 1.51. 3.6. 4.05. 5.05. 8.7.

materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Materials 10.18. 10.11. 10-07

Valves Category M Fluid Service ............................. 8-35 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.07 pressure build up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.04 ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-05

Visual Examination internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 O, 8-26 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28, 10-03

Washers. Use of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Weld examination of welds . . . . . . . . . . . . . . . . . . .1 0-1 5, 1 1-01, 1 1-1 4 fillet size . . . . . . . . .

reinforcement . . . . . . .7-08. 11-08 . . . . . . . . . . . . . . . . . . . . .

Welding Procedure qualification of . 1-1 2. 1.65. 1.66. 1.76. 4-1 7. 8.23. 8.29. 1 1-09 specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.21. 8-22




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ASME B31.3



General Information


These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity. In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply bearing the original interpretation number with the suffi R is presented.

ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASh4E does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.




107



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~

ASME 831.3 90 W D757b70 0525273 287 =

B31.3

Subject Interpretation Para . 300.1.3(d), Exclusions .......................................................... 10-05 Para . 301.3.1 and Table 323.2.2, Minimum Temperature Design ......................... Para . 304.1.2, Straight Pipe Under Internal Pressure ................................... Para . 304.5, Pressure Design of Flanges and Blanks ....................................

Designer Responsibility .......................................................... Para . 304.7.2(c), Unlisted Components and Elements .................................. Para . 304.7.2, Unlisted Components; and Para . 300@)(2).

Para . 304.7.2(c), Unlisted Components and Elements .................................. Paras . 311.2.5(a) and (b). Fillet Welds; and Para . 328.5.4(d),

Welded Branch Connections ......................................................

O Para . 322.6.1(b), Stop Valve in Piping for Pressure Relieving Safety Datices .............. Para . 323.4.2@)( 1). Specific Requirements for Other Cast Irons ......................... Para . 327.4.2, Fillet and Socket Welds ................................................ Para . 340.3, Rights of the Owner’s Inspection; Para . 341.2(c), Responsibility for

Examination; Para . 341.4.l(a)(l), Visual Examination; and Para . 341.4.1(c), Certification and Records .....................................

Para . 341. Examination ............................................................. Para . 341.3.4, Progressive Examination ............................................... Paras 341.3.4(a) and (e). Progressive Examination .....................................

Cyclic Conditions; and Para . 344.6.2, Ultrasonic Examination .......................... Para . 341.4.l(b)(l), Other Examinations; Para . 341.4.3(b), Examination - Severe

Para . 345.9.1, Examination of Welds ................................................. Para . A323.4.2(a)(l), Specific Requirements for Thermoplastics ......................... Para . A328.2(a), Bonding Qualification Tests; and Para . A328.5.3(b), Solvent

Table A.1. Basic Allowable Stresses in Tension for Metals .............................. Cemented Joints in Thermoplastic Piping ...........................................

10-02 10-20 10-14

10-11 10-07 10-18

10-04 10-10 10-01 10-19

10-03 10-16 10-12 10-09

10-17 10-15 10-06

10-08 10-13

File No . B31-91-004 B31-90452 B31-91-042 B31-91-024

B31-91416 B31-91-007 B31-91-038

B31-90457 B31-91-013 B31-90-051 B31-91-039

B31-90-056 B31-091-028 B31-91-019 B31-91412

B31-91-033 B31-91-027 B31-91-006

B31-91-008 B31-91-021

109



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831.3 Interpretations No. 10 10-01.10-02


Subject: ASME B31.3-1990 Edition, Para. 323.4.2(b)(l)


File: B31-90-051

Question (1): In accordance with ASME/ANSI B31.3-1990 Edition, para. 323.4.2(b)(l), may cast iron piping components be used in a refrigeration system, using a hydrocarbon refrigerant with a design pressure of 300 psig.

Reply (1): No, if the owner classifies a refrigeration system using a hydrocarbon refrigerant as a process unit. Otherwise, yes, if the system is located outside process unit limits and all other requirements of para. 323.4.2 applicable to cast iron are met.

Question (2) What is the meaning of “process unit limit” in para. 323.4.2(b)( i)?

a Reply (2): See the definition of “process unit” in para. 300.2. The owner must classifi and

establish the boundaries of process units not specifically described in para. 300.2.


Subject: ASME B31.3-1990 Edition, Para. 301.3.1 and Table 323.2.2

Date Issued: June 14, 1991 e File: B31-90-052

Question (1): In accordance with ASME B31.3-1990 Edition, para. 301.3.1, is the design minimum temperature the lowest component temperature expected in service, which may result from auto refrigeration?

Reply (1): Yes, unless the process design provides means to control minimum temperature.

Question (2): In accordance with Table 323.2.2, Note (2), for P-No. 1 carbon steel materials, if the design minimum temperature is below - 20”F, but not lower than -50”F, and the coincident pressure below - 20°F does not exceed 25% of the design pressure, and the combined longitudinal stresses do not exceed 6 ksi, is impact testing required?

Reply (2): No.

Question (3): For P-No 1 materials, if the design minimum temperature is below -50”F, is impact testing required?

Reply (3): Yes, the Table 323.2.2, Note (2) exemption applies only for design minimum temperatures down to -50°F. Also see para. 302.2.4(h).

Question (4): If impact testing is required, is the required test temperature the design minimum temperature, even though coincident pressure may be at or near atmospheric pressure?

Reply (4): Yes. See Table 323.2.2 Column By Box B-3, and Para. 323.3.4.

111



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ASME B31.3 90 = 0757b70 OS25283 735



Subject: ASME B31.3-1990 Edition, Interpretations 3-7 and 5-10, Paras. 340.3, 341.2(c), 341.4.1 (a)( i), and 341.4.1 (c)


File: B31-90-056

Question (1): In component markings the examiner that the

accordance with ASME B31.3-1990 Edition, para. 341.4.1(c), are individual in accordance with the applicable material specification sufficient to assure material is of proper specification and grade?

Reply (1): Yes.

Question (2): In accordance with para. 340.3, may the owner?s Inspector require that all documentation produced by the original material manufacturer, including documentation beyond the material specification requirements, be provided?

Reply (2): No.

Question (3): For an owner?s inspection system, does the Code require documentation to assure component traceability?


Question (4): For an owner?s stocking system, are warehouse markings sufficient to assure component traceability?


Question (5): For components which lack full identification, because of size or other reasons, may the shipping container be properly marked instead.

Reply (5): The Code does not address this subject, except as requirements are stated in the referenced specification.


Subject: ASMEANSI B31.3-1987 Edition With Addenda, Paras. 311.2.5(a) and (b) and 328.5.4(d)

Date Issued June 14, 1991

File: B3 1-90-057

Question: Does ASMWANSI B31.3-1987 Edition and its Addenda permit the use of fillet welds as the primary pressure retaining welds for installation of a full encirclement tee type branch connection?

Reply: ASME/ANSI B31.3-1987 Edition and its Addenda do not specifically address rules for fillet welding of full encirclement tee type branch connections.

112



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ASME B3L-3 4 0 0759670 0525282 871 =

B31.3 Interpretations No. 10 10-05, 10-06

e

a

a

a

a


Subject: ASME/ANSI B31.3-1987 Edition, Para. 300.1.3(d); ASME B31.3-1990 Edition


File: B31-91-004

Question (1): In accordance with ASME/ANSI B31.3-1987 Edition, para. 300.1.3(d), is piping which is contained in a pressure vessel exempt from the Code?

Reply (1): Yes.

Question (2): In accordance with para. 300.1.3(d), if a pressure vessel, heat exchanger, pump, or other piece of equipment is supplied with external piping, are the piping components exempt from the Code?

Reply (2): No.

Question (3): Does ASME B31.3-1990 Edition provide a means for qualifying the use of ASTM A 240 TP 304 material to -457°F if material is thinner than 0.099 in.?

Reply (3): No.


Subject: ASME B31.3-1990 Edition, Para. A323.4.2(a)(l), Specific Requirements for Ther- moplastics


File: B31-91-006

Question (1): Does ASME B31.3-1990 Edition, para. A323.4.2(a)(l) prohibit the use of thermoplastic expansion joints, such as PTFE, in above ground flammable fluid service.

Reply (1): Yes.

Question (2): Does the Code permit the use of thermoplastic expansion joints, such as PTFE, in above ground flammable fluid service if safeguarded?

Reply (2): No.

113



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Subject:


ASME B31.3-1990 Edition, Para. 304.7.2(c), Unlisted Components and Elements

File: B31-91-007

Question (1): Paragraph 304.7.2(c) of ASME B31.3-1990 Edition requires that the proof test be subject to the approval of the Inspector. Is it permissible for a professional engineer or others without the official title of inspector, but experienced in the design, fabrication, or inspection of B31.3 piping, to approve the proof test?

Reply (1): Yes, provided that the individual has been designated by the owner and is qualified

Question (2): For components qualified in accordance with para. 304.7.2(c), must the inspector

Reply (2): No.

to perform that function in accordance with para. 340 of B31.3.

designated by the owner to approve the test also have been a witness to the proof test?


Subject: ASh4E B31.3-1990 Edition; Para. A328.2(a), Bonding Qualification Tests; and Para. A328.5.3(b), Solvent Cemented Joints in Thermoplastics Piping


File: B31-91-008

Question (1): In conforming to the qualification tests per ASME B31.3-1990 Edition, para. A328.2.5(a), is a bell-end-to-plain-end connection considered a pipe-to-pipe joint for plastic piping?

Reply (1): Yes, if the joint connects two straight pipe sections of the test assembly.

Question (2): If a bonding procedure specification for plastic piping specifically states that it is limited to pipe-to-fitting joints only, are both a pipe-to-pipe joint and a pipe-to-fitting joint mandatory for conformance with the qualification tests per para. A328.2.5(a)?

Reply (2): Yes.

Question (3): Can the lack of a small fillet as specified in para. A328.5.3@) be considered an

Reply (3): Yes. Also see ASME B31.3, Interpretation 8-14, Question (6). The Committee will

unfilled area per Table A341.3.2?

consider future revisions to this paragraph.

114



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ASME B31.3 90 = 0 7 S ï b 7 0 OSt?íZ8li b 4 4


Subject: ~

ASME B31.3-1990 Edition, Para. 341.3.4(a) and (e), Progressive Examination

831.3 Interpretations No. 10 10-09.10-10


File: B31-91-012

Question (1): In complying with the requirements of ASME B31.3-1990 Edition, para. 341.3.4, must additional items examined be of the same size as the defective item?

Reply (1): No, unless otherwise specified by the engineering design.

Question (2): In para. 341.3.4(e), does the phrase “all items represented by the progressive examinations” refer only to those items which have been examined and found to contain defects?

Reply (2): No.


Subject: ASME B31.3-1990 Edition, Para. 322.6.1(b), Stop Valve in Piping for Pressure Relieving Safety Devices


File: B31-91-013

Quest?on (1): In accordance with ASME B31.3-1990 Edition, para. 322.6, are reduced area stop valves permitted on both the inlet side and discharge side of pressure relieving devices protecting piping?

Reply (1): Yes, provided the additional requirements of para. 322.6 are met.

Question (2): In accordance with para. 322.6, are reduced area stop valves permitted on both the inlet side and discharge side of pressure relieving devices protecting pressure vessels in accordance with Section VIII, Division 1 of the BPV Code?

Reply (2): The requirements of ASME B31.3 apply only to B31.3 piping.

115



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ASME 831.3 90 D 0759b70 0525265 580

10-11. 10-12, 10-13 831.3 Interpretations No. 10


Subject: ASME B31.3-1990 Edition; Para. 304.7.2, Unlisted Components; and Para. 300(b)(2), Responsibility


File: B31-91-016

Question: In accordance with ASME B31.3-1990 Edition, para. 304.7.2, is the designer responsible to the owner for assuring that the design of unlisted components has been substantiated?

Reply: Yes, see also para. 300(b)(2).


Subject:


ASME B31.3-1990 Edition, Para. 341.3.4, Progressive Examination

File: B31-91-019

Question (1): In accordance with ASME B31.3-1990 Edition, para. 341.3.4, is progressive examination mandatory?

Reply (1): Yes.

Question (2): Is progressive examination per para. 341.3.4 considered as part of the Code procedure to determine the acceptability of welds in a particular lot of piping?

Reply (2): Yes.


Subject: ASME B31.3-1990 Edition, Table A-1, Basic Allowable Stresses in Tension for Metals


File: B31-91-021

Question: In accordance with ASME B31.3-1990 Edition, is it acceptable to use the published ASTM A 240 or ASTM A 167 Type 317L allowable stresses in Table A-1 for a design based on seamless pipe purchased to the ASTM A 312 Type 317L pipe specification?

Reply: Yes, see para. 323.1.2.

116



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ASME 831.3 90 D U f S 9 b 7 0 OS25 i )Bb 417

631.3 Interpretations No. 10 10-14,lO-15, 10-16


Subject: ASME B31.3-1990 Edition, Para. 304.5, Pressure Design of Flanges and Blanks O


File: B3 1-9 1-024

Question: Shall flanges designed in accordance with ASME B31.3a-1990, para. 304.5.1(b) or 304.5.2(b) be designed using the allowable stresses from Table A-l?

Reply: Yes, except for austenitic stainless steels and nickel alloys whose allowables are based on 90% of yield strength at temperature and are shown in italics or boldface in Table A-l. In those cases, refer to para. 302.3.2(e) for the recommended allowable stress limits.


Subject: ASME B31.3-1990 Edition, Para. 345.9.1, Examination of Welds


File: B3 1-91 -027

Question (1): In accordance with ASME B31.3-1990 Edition, para. 345.9.1, when 100% radiography is performed as part of an alternative leak test for Normal Fluid Service piping, are the acceptance criteria for Normal Fluid Service used?

Reply (1): Yes.

Question (2): When 100% radiography, instead of 20% radiography, is required by the engineering design for Category M Fluid Service and the acceptance criteria are specified to be in accordance with B31.3, are the acceptance criteria the same as for 20% radiography?

Reply (2): Yes.


Subject: ASME B31.3-1990 Edition, Para. 341, Examination


File: B3 1-9 1-028

Question: In accordance with ASME B31.3-1990 Edition, paras. 341.3.3 and 341.3.4, what method of examination is required for a weld replaced due to defect@) observed under a visual examination process?

Reply: The new weld requires the same examination as was required for the original weld.

117



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ASME 8 3 2 . 3 90 9 0757b70 0525287 353 =

10-17 631.3 Interpretations No. 10


Subject: ASME/ANSI B31.3-1987 Edition, Paras. 341.4.l(b)(l), 341.4.3(b), and 344.6.2


File: B31-91-033

Question (1): In accordance with A S W A N S I B31.3-1987 Edition, paras. 341.4.1@)(1) and 341.4.3(b), is it acceptable to replace radiographic examination (RT) with ultrasonic examination (UT)?

Reply (1): Yes, but in the case of severe cyclic conditions [para. 341.4.3@)], such replacement

Question (2): In accordance with paras. 341.3.2 and 344.6.2, what are the acceptance criteria

is permissible only if specified by the engineering design.

for welds examined by ultrasonic examination?

Reply (2): The requirements are specified in para. 344.6.2.

Question (3): What is the definition of “linear-type” discontinuities?

Reply (3): A discontinuity which is a least three times as long as it is wide.

Question (4): For ultrasonic examination are there types of discontinuities other than linear- type discontinuities which are acceptable?

Reply (4): The Code does not address such discontinuities.

Question (5): For ultrasonic examination will any types of discontinuities be unacceptable if they meet the requirements as stated in para. 344.6.2(a)?

Reply (5): The Code does not address types of discontinuities other than linear-type.

Question (6): Is there other information in B31.3 concerning acceptance criteria for ultrasonic examination under para. 344.6?

Reply (6): No.

118



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ASME 831.3 90 = 0759b70 0525289 1 2 b =

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 831.3-1990 Edition. References in brackets are to



No. - -

Introduction ................................ 1-3, 1-6, 1-7 300 . . . . . . . . . ........................... .7-1 O, 8-1 7

. . . . . . .l-26, 1-32, 4-08, 5-03, 8-09, 10-1 1 300(~) . . . . . . . . . . . . .3-2, 3-4, 4-10, 6-03R (Vol. 7), 7-05, 8-30 300(c) [300(e)] ............................. .1-3, 1-6, 1-7 300.1 ..................... ... .7-I O, 8-1 7, 9-06 300.1.1 Fig. 300.1.1 300.1.3 [300.1.4]. . . . . . . . . . . . . . . . .l-8, 1-16, 1

. . . . . . . . .l-47, 1-52, 2-26, 3-1, 4-19, 6-01, 8-01, 9-02 . . . . . . . . . . . . . . . . . . . . l-8, 1-1 9, 2-26, 7-1 O, 8-1 7

300.1.3d) ................................. 300.2

Category D Fluid Service . . . . . . . . . . . . . . . . .4-13, 5-03, 6-01 Category M Fluid Service . . . . . . l -40, 1-73, 6-01, 8-09, 9-02 notch-sensitive .............................. owner .......................................... 2-30 piping components .............. piping system . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-30, 9-06

.............. ,542, 8-09 301 ..................... .................... 5-11

.... .2-3, 7-01 301.2.1 ....................................

..................................... 2-3

e severe cyclic conditions.. .

.......................

........................ 301.3.2 ........................ 301.5.3 ........................ 301.7.2 ........................ 302 ..................... ..................... 1-32 302.2 ............................................. 1-50 302.2.4 [302.2.3] ..................... 1-3, 1-32, 2-14, 3-4,

4-1 1, 7-01, 7-04, 8-04 302.3.2 ...................... .l-18, 1-38, 2-16, 3-13, 8-25 302.3.4 ........................................... 2-20 Table 302.3.4 .l-42, 1-78, 2-20, 3-1 1 302.3.5 . . . . . . . . . . . . . . . . . . 1-20, 1-50, 2-14, 2-15, 2-24, 3-4,

4-10, 4-12, 6-03R (Vol. 7), 6-07, 7-04, 7-05, 8-16

302.3.6 ........................... .I-50, 2-15, 2-16, 2-17 302.4 ............................................. 1-20 303 .............................................. 6-05 304.1.1 . . . . . . . . . . . . . l-42, 1-54, 1-70

1-70, 2-1 1, 10-20 . . . . . . . . . . . . . . . . . . . 1-22, 5-11

e ......................

304.3,2 ........................................... 4-05 e 304.3.3 . . . . . . . . . . . . .4-03, 7-02, 8-06, 8-37

Cumulative Index - 631.3 Interpretations Vols. 1-10


NO. -

Fig. 304.3.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-37 304.3.4 . . . . . . . . . . . . . . . . . . . Fig. 304.3.4 . . . . . . . . . . . . . . . . . . .

304.5.1 ............................ 304.5.1(b) . . . . . . . . . . . . . . . . . 304.7.2 . . . . . . . . . . . . 1-51, 3-2, 4-05, 5-05, 5-1 1, 6-09, 10-07,

. . . . . . . .8-18

10-11, 10-18 304.7.4 ....

305.2.1 . . . . . . . . . . . . . . . . . .

. . . . . . . . . .........................

Table 314.2.1 .....................

315.3.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

318 ........................ 8-13 . . . . . . . . 9-01

319.2.1 . . . . . . . . . . . . . . . . . . . . .2-17 . . . . . . . .7-04, 7-05

. . . . . . . . . . . . . .

319.4.1 .................................... 319.4.4 . . . . . . . . . . . . . .

323.1.1 ..............................

323.2 ......................... 323.2.1 ................................... Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . . . . 1-1 2, 1-48, 1-65, 1-76,

323.2.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-06 323.3 . . . l-76, 5-1 3 Table 323.3.1

[Table 323.2.21 . . . . .l-12, 1-76, 4-17, 5-19, 5-21, 8-29, 10-2

2-19, 3-8, 4-01, 4-15

............................

(a)



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ASME B3L.3 90 0759b70 0525290 998


No . - 323.3.4 ........................................... 8-30 323.3.5 ............................................ 2-9 323.4.2 ................................... .lo-01. 10-19

................................. 5-14

. . . . . . . . . . . . . .1-11. 1.51. 2.3. 8.07. 8-34 328 ............................................... 7-02 328.2 [327.5] ...................................... 1-66 328.2.1 [327.5.1, 327.5.21 . . . . . . . . . . . . . . . . .1.76. 4.17. 8-29 Figure 328.4.4 ............................... .8-28. 9-08 328.5 [327.4] ...................................... 5-09 328.5.1 [327.4.1] ................................... 5.17 328.5.2 [327.4.2] ................................... 5.12 Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . .1.28. 5.12, 6.02, 6.05. 8-27 328.5.4 [327.4.4]. . . . . . . . . . . . . . . . . . . 1.59, 1.74, 2.10. 4.03.

4.14. 7.08, 8.13. 10-04 Fig . 328.5.4 [Fig . 327.4.41 ....... .l-59. 1.74, 4.03, 4.16. 7-08 328.6 ............................................. 2-18 330 .............................................. 8-21 330.1 ............................................. 8-23 Table 330.1.1 ...................................... 9.05 331 .............................................. 8-12 331.1.1 ...................................... 8.08. 9-05 Table 331.1.1

[Table 331.3.11 ............... .1.69, 2.2. 5.06. 8.24. 9-03 331.1.2 ........................................... 8-05 331.1.3 (331.3.61 .............. .1.39. 1.59. 4.06. 5.06, 9-03 331.1.4 [331.1.2] ................................... 5.08 331.1.6 [331.3.4]. .................................. 5.08 331.1.7 [331.3.2] ............................. .1.78. 8-22 331.2.2 [331.1.1] ............................. .1.39. 1-78 331.3.4 ........................................... 8.05 331.3.7 ........................................... 8-05 332.1 ............................................. 8-03 332.2 [329.1] ...................... .1.23. 1.53, 4.02. 8-20 332.4 [329.3, 330.21 ................................. 2-2 335.2 .............................................. 2-5 340.2 [336.1.2] .................................... 1.26 340.3 [336.3] ............................... .l.lO. 10-03 340.4 [336.2] ...................................... 1-31 341 ............................................. 10-16 341.2 [336.1.1, 336.1.31 ....... .1.10. 1-26, 1.27. 2.28. 10-03 341.3.1 [336.5] ............................... .1.64. 2-4 341.3.2 ........................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 ............................ 5.09

[Table 327.4.1Al . ......... 1.1. 1.9. 1.14. 1.41, 2.8, 5.04. 5-1 3, 5-1 6. 5-1 7. 5-1 8. 5.20, 6.04.

7.06. 8.32. 8.38. 9-04

Table 341.3.2A

Table 341.3.26 [Table 327.4.161 ................ .5.18. 6-04 341.3.4 [336.5, 336.5.41 . . . . . . . . . 1.62. 2.25. 2.32. 3.5. 3.14.

10.09. 10-12 ....... .1.24, 1.45, 3.12. 5-20

341.4.1 [336.5.1]. ............. 1.10. 1.26, 1.27, 1.60. 2.12. 2.28. 3.7. 3.12. 4.12. 5.10.

8-02. 8.10. 8.26. 10.03. 10-17 341.4.2 ........................................... 8-38 341.4.3 ........................................... 8-10 341.5 ............................................. 8-38 341.5.1 [336.6.1] .............................. .1.5. 3-12 342.1 [336.4.1] .................................... 2.28

341.4 [336.5] ............

343 [336.4.1] ...................................... 2-28 344[336.4] ....................................... 5-09


NO . - 344.2 [336.4.2] ......................... .2.28. 8.10. 8-26 344.5 [336.4.5] ......................... .1.10. 1.60. 2-12 344.6 [336.4.6] .................................... 1.60 344.6.2 .......................................... 10-17 344.7 [336.4.7] . 345 [337] . . . . . 345.1 [337.1] . . 345.2.2 ....... 345.2.4 [337.4.3 345.2.6 [337.1] 345.3 [337.3] . . 345.4 .........

.............................. 2.28. 3-14

................ .1.2. 1.72. 2.31. 3.3. 8-31

............... .1.4. 1.30. 4.04. 6.08. 8-15

................................... 8-31

................................... 1-35

............................... 1.2. 5-22

.......................... 2.6. 3.10. 5-02

................................... 8-04 345.4.2 [337.4.1] . ........ .1.35, 1.61. 1.63, 2.23. 4.04. 9-09 345.4.3 [337.4.2] ................................... 1.63

345.7 [337.5.2] .................................... 1.36 345.8 [337.6] ................................ .1.25. 3-10 345.9 [337.5.1] .............. .4.09. 5.07. 6.08, 8.15, 10-15 A304 ............................................. 8-14 A304.5.1 .......................................... 1-67 A314 ............................................. 8-33 A323.4.2 ......................................... 10-06 A327.2.4 .......................................... 7-09

345.5 [337.4.4] ......................... .1.35. 1.43. 6-08

A328.2(a) ......................................... 10-8 A328.2.1 .......................................... 8-14 A328.5 ..................................... 8.14. 10-08 K315 ............................................. 7-07 K322.3 ........................................... 7-07 Fig . K328.5.4 ...................................... 8.37 M307.2 ........................................... 8-35 M322.3 ...................................... .2.13, 3-6 M323.1.3 .......................................... 3.7 M326 ............................................ 2-13 M335.4 [M335.5, M335.61 ............................ 3.6 M341.4 [M336.5] ............................ .1.24. 1-45 M341.4.1 [M336.5.1] .......................... .2.28. 3-7 M345.1 ........................................... 6-08 MA306.5 .......................................... 9-02 MA323.4 .......................................... 9-02 MA323.4.2 ........................................ 8-35 Appendix A Notes

(No equivalent) ((1 4)] .............................. 2.20 Note (1 7) ....................................... 4.18 Note (20) [(30)] .................................. 1.77 Note (57) [(2)] ................................... 1.58

Table A-1 [Table 11 .......... 1.13, 1.18. 1.29. 1.38. 1.48, Appendix A

1.77. 2.1, 3.8. 3.9. 3.13. 4.12. 4-1 3. 6.01, 6.06. 7.03. 8-1 1.

8.18. 8.25. 8.34. 8-36 Table A-1 B [Table 11 .............. .1.78, 2.20. 4-18. 7-03

Appendix D .................... 1.6. 1.7. 1.34, 1.46, 1.55. 1.56. 1.71. 2.7. 2.24. 4.16.

5-01. 5-1 5. 6-06 Appendix E [Appendix KI ...................... . l-44, 5-1 O Appendix F [F323.2] ................................ 1.29 Appendix G ....................................... 5.12 Appendix H ....................................... 8.06 Appendix J ........................ . l -28, 1.54. 1.75. 5-04 Appendix M ................................. .6.01. 8-09 Case 137 ........................................... 3-1 Case 141 .......................................... 1-51

íb) Cumulative Index . 831.3 Interpretations Vols . 1-10



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ASME B3L-3 90 0759b70 OS25271 884

SUBJECT INDEX

Interpretation No . Subiect -

Acceptance Criteria pressure tests ...................................... . l-2 weld ...................... 1.1, 1.9. 1.14. 1.41. 2.8, 5.09. a 5.13. 5.17. 5.18. 5.20. 6-04. 7.06. 8-32

Allowable Stresses ................................. 4.12 bases for .................... .1.18. 3.13. 8.11. 8.25. 10-13 for ASTM A 3 12 .................................... 1.29 for ASTM A 387 .................................... 8.25 for ASTM A 570 .................................... 1.38 for ASTM A 587 .................................... 1-13 for ASTM A 671 .................................... 1-48 for ASTM B 464 .................................... 8.11 for austenitic stainless steels ........................... 3.13

Alternative Tests for Category D fluid service ......................... . l-36 requirements ....................................... 8.15 sensitive leak test .................................. . l-25

Authorized Inspector ................ see Owner's Inspector

Bending .................................... .4.02. 8-03

Bends corrugated ......................................... 1-23 miter ................................... see Miter Bends reduction of outside diameter ......................... 8.20

Bonding Qualification Test hot gas welded ..................................... 8.14 minimum burst pressure ........................ .7.09, 8-14 procedure specifications for plastic piping . . . . . . . . . . . . . .i 0.08 a solvent cement ..................................... 8-14

Bonds heat fusion ........................................ 8.14 hot gas welded ..................................... 8.14 test assembly ...................................... 7.09

Bolting Materials .................................. 4.15

Branch Connections extruded outlets ......................... . l-37, 2.27. 6-09 flexibility analysis ................................... 9.01 integrally reinforced fitting ............................ 4.05 projection into run pipe ........................ .8.28. 9-03 reinforcement ................................ .8.06, 8-37 weld requirements . . . . . . . . 2.1 O. 4.03. 4-1 4. 7.02, 7.08. 10-04 a Cumulative index . 63 1.3 Interpretations Vols . 1 . 1 O


No . - Brazed Joints for flammable service ................................ 1-17

Buckles ..................................... .l-23. 1-53

Cast Irons specific requirements ............................... 10.01

Category D Fluid Service alternative pressure test for .......................... . l -36 limitations ................................... .4.13. 5-03 radiographic examination ............................. 8.38

Category M Fluid Service clarification of term ........................... . l-73, 9-02 double contained piping. ............................. 8.35 leak test ........................................... 6.08 liquid oxygen ...................................... 8.09 requirements ................................. .8.35. 9-02 tubing size limitations ................................ 2.13 "very small quantity" ............................... . l-40

Code Coverage B31.3 versus B31.4 ........................... .l-47, 7-10 general hydrocarbon service .......................... 6-01 in-line sensing devices ............................... 8-01 new and replacement piping .......................... 5.22 offshore platform ................................... 8.17 oil heating system ................................... 4.19 synfuel plant piping ........................... .1.52, 2-26 tobacco plant piping .................................. 3.1


certification .............................. .1.26. 3.7. 5-10 design conditions .................................... 2.3 flexibility characteristic . .............. . l-55, 1.56. 2.24. 5-01 in-line sensing devices ............................... 8.01 referenced standards .......................... .1.44. 5-10

and valves)

Compressors internal piping ...................................... . 1-8

Corrugated Bends .................................. 1-23

Cyclic loading .................................... 5.12



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conditions .......................................... 2.3 lame theory ....................................... 1.57 minium temperature ................................ 10.02

Design)

Displacement Stress .......................... .2.14. 2-24



Examination extent of .................................... .1.24. 5-18 in process ......................................... 3.14 progressive .................... .see Progressive Examination radiographic .................. see Radiographic Examination random ........................... 1.27. 1.45, 1.62, 2.12.

required ................................ .1.24. 1.60. 6-04 severe cyclic conditions ............................. 10.1 7

visual ................................. .2.28, 8-1 O. 10-03 ultrasonic ........................................ 10.1 7

2.32. 4-12

Spot .............................................. 1.62

Exclusions for compressors and internal piping .................... . l-8 for interconnecting piping ............................ 1.1 9 listed in scope ..................................... .1 0-5

Expansion joints .................................... 1.16

Extruded Outlet pressure design of ............................. . l -2 1. 1-70 tees considered as .................................. 1.55


Fillet Weld internal. slipon flange ............................... 8.27 pressure containing .................................. 8.13 size .............................................. 1-74 use ............................................... 10.4

Fittings



B16.9 ........................................ 1.7. 5-01

MSS SP-75 ........................................ 1-11

Flammable Service ................................. 1.17

Flanges assembly ............................................ 2.5 design ................................... .1.67, 3.4, 9-7 general ........................................... 9.10 long welding neck .................................. 4.05 slip-on ...................................... .5.12, 8-27 use of aluminum .................................... 1.51 use of raised and flat face metallic ..................... 9.07


No . - Flexibility Analysis branch connections ................................. 9.01 exemptions from .................................... 1.33


diameters ....................................... . l-56 for a tee ............................... .1.55. 1.56. 5-01 for components not listed

in Appendix D ............................. .1.55. 2-24

Flexibility Factors basis for ......................................... . l -56 for 816.9 tees ...................................... .1-. 7 for fabricated intersections .................. .1.6, 4.16, 5-15 for welded elbows ................................... 1.6

Fluid Service general hydrocarbon ................................ 6.01 responsibility for

categorizing ................................ .4.08. 8-09


onset ........................................... 1-58

Hardness limitations on ....................................... 2.2 records ........................................... 8.22

Heat Treatment cooling rate ....................................... . l-69 for austenitic stainless steel ........................... 1.65 for bending and forming .............................. 2.2 for valve parts ...................................... 8.12 governing thickness ................. .1.39, 1.59, 4.06, 5-06 heating rate ....................................... . l-69 local ....................................... .5.08, 8-05 monitoring ................................... .5.08, 8-05 requirements ............. .8.08, 8.21, 8.23, 8.24, 9.03, 9-05 SP-1 through SP-5 .................................. 8.24 when radiography is

required .................................... .1.64, 2-4


Impact Tesis absorbed energy data ................................. 2.9 alternative methods ................................. 8-30 base meta! ......................................... 4.01 exclusions from ......................... . l-76, 5-1 4, 8-30 heat treatment required .............................. 5.19 in qualifying procedures ............................. -8-29 of aluminum filler metals ............................. 2.19 of austenitic stainless steel ........................... . l-65 of bolting materials .................................. 4.15 of the heat affected zone ....................... .1.76, 5-21 of weldments ...................... .1.12. 1.65. 1.76, 5-21 temperature limitation ......................... .5.14. 8-30

e

0

e

e

e (d) Cumulative index . 631.3 Interpretations Vols . 1-10



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ASME B3L-3 70 0757b70 OC25273 b57


No . -

Imperfections (see also Acceptance Criteria) concave root surface ........................... .1.1. 6-04 determination of .................................... 8.32 lack of fusion ...................................... 5.09 porosity ............................ .1.9, 5.13. 5.16. 5-20 slag inclusion ...................................... 5.20 tungsten inclusions ............................. .1.9. 5-1 7 undercutting ............................. . l-1 4. 2.8. 6-04

Installed Piping ................................... . l-30

Instrument Piping ............................ .7.07, 8-01

Internal Piping, Equipment ...........................

Joint Factors O

1-8

for ASTM A 234.

for branch connections .............................. 8.06 for circumferential welds ............................ . l-42 for longitudinal and spiral

welds ................................ .1.78, 3-1 1, 8-06

ASTM A 31 2. ASTM A 403 .......................... 2.20

Joints circumferential bands ................................ 5.11 exposed during test ............................ .2.6. 3-10 instrument tubing ................................... 7.07 special . ........................................... 8.13

O Lateral Fittings ...................................... 1.6

Leak Tests acceptance criteria ............................. alternative . . . . . . .

for Category D fluid service . . for system designed for

isolation of test pump.. . . . . . o psi . .......................................... 2-31

. . . . . . . . 1.72 a of piping connecting

equipment ... . . . . . . . . . . . 3.3 of replacement pi . . . . . . . . . . 5.22 painting before test ........................ .2.6, 3.10, 5-23 personnel qualification . . . . . . . . . . . . . . . preparation for ..................... reduced pressure

sensitive . . . . . . . . . . . . . . . . . . . . . . . . temperature correction for .

(hydrostatic test) ............................ . l -61, 2-23

. . . . . . . . . .1.35, 1-43

Lethal Substance .............................. O . . . . . 1.73


No . - Limitations on imperfections ......................... see Imperfections on hardness ........................................ 2-2 on tubing size ................................. .2.13, 3-6

Low Temperature Requirements ......................... see Impact Tests

Materials API 5L .............................. 1.78. 2.4. 3.9. 3.11.

6.01. 6-06 API5LX ............................................ 2-4 ASTM A 234 ...................................... 2-20 ASTM A 312 ........................... .l-29, 1-77, 2-20 ASTM A 403 ................................ .l-77, 2-20 ASTM A 487 ...................................... 8-07

................................ 2-1

............................... 1-38 ASTM A 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 ASTM A 633 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

................................. 3-8 . . . . . . . . . . . . . . . . . . 1-48

ASTM B 241 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 ASTM B 337 . . . . . . . . . . . . . . . 4-18 certification . . . . . . . . . . . . . . . . . . . . . . . . .5-10, 8-02 conforming to two grades . . . . . . . . . . . . .8-18, 8-34 notch sensitive ............................ reidentification . . . . . . . ........................... 8-19

. . . . . . . . . . . . . . . . . . .

toughness requirements .............................. 5-19



explanation of ..................................... . l-33

Nomenclature d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54 T ................................................ 1-28 t , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75 T, .......................................... 5-04, 5-16 -

Nonmetallic Piping in Category M Fluid Service joint requirements ............................. .7.09. 8-14

.......................... 8.35

Notch Sensitive materials .......................................... 2-22

Occasional Variations

loads ............................. .1.50. 2.15. 2.16. 2-17 (pressure/temperature allowances) . . . . . . . . l-3, 2-1 4. 4-1 1

Owner responsibilities ........................... . l -26, 2.30. 5-22

Owner’s Inspector qualifications of ................................... . 1-3 1 responsibilities of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-26




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Pipe elbowless 8.03 in corroded condition .............................. .î .i 5 made from plate .............................. . l-48, 8-36 of noncircular cross section 3.2 pressure testing 9.09 spiral welded 7.03 straight, under internal pressure ....................... í 0-20

.........................................

............................ .....................................

......................................

Pipe supports configurations 6.07 longitudinal stress effects ............................. 7.05 use of plastic 1.49

......................................

.......................................

PI as t i c lined pipe . use of screwed flanges ................... 8.33 pipe supports ...................................... 1.49


Positions qualification of welding ............................. , l -66



Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ........................... . l-68 of extruded headers ............................ 1.2 1. 1-70 of flanges and blanks .............................. .1 0.14 of miter bends 1.2 1 ..................................... Of Pipe ............................ 1.42, 1.54, 1.57, 1.68,

1.70, 2-1 1 of valves 8.04 ..........................................

Pressure Rating valve 8.04 variations 4.11

Pressure Relief Devices acceptable devices ............................ .2.21, 2-29 setting ...................................... .1.32, 7-01 stop values .1 0.1 o

Pressure Surges loads due to 1.50

............................................. ..........................................

......................................

.......................................

Pressure-Temperature Rating .................. .5.0 5, 8-34


Progressive Examination ............. 1.5. 1.62. 3.5. 10.09. 10.10. 10-12

Published Specification ............................. 1.1 5

(f)

e Radiographic Examination

as supplementary examination ......................... 8-38 random radiography ................. 1-27, 1-45, 1-62, 2-12,

records 1-10 requirements ....................................... 6-04 selection of welds for

................................... 2-25 spot radiography .............................. .l-62, 3-12 when PWHT is required ........................ .l-64, 2-4

Records certification ............................. 5-1 O, 8-02, 10-03 of hardness tests .................................... 8-22 for radiographic examination 1-10 retention of 1-10

Reinforcement, Branch attachment weld .............................. .4-03, 7-08 clarification of terms ................................. 1-37 limits of ..................................... .2-27, 9-04

Repairs to welds .......................................... 2-18

Responsibility designer ......................................... .1 0-11 rights of owner's inspection .......................... 10-03

Safeguarding 5-12


Seismic Loads ..................................... 4-07 stresses due to ..................................... 2-17

Severe Cyclic Conditions cyclic loading ...................................... 5-12 large rapid temperature change ........................ 8-09 spiral welded pipe .................................. 7-03

Simplified Flexibility Analysis ....................... . l-33

Standard Components manufacturers markings .3-7, 8-02 valves .5-05, 8-04, 8-07

Standards compliance ........................................ 5-10 superseded ........................................ 1-44

Stresses (see also

displacement stress range ............................. 7-04 due to cold spring .................................. 8-16 due to occasional loads .............................. 2-16 due to pressure surges ............................... 1-50 due to seismic loads ................................. 2-17 due to thermal gradients .............................. 3-4 longitudinal 1-20, 1-50, 2-1 5, 2-24, 4-1 O,

100% ............................................ 5-09

2-32, 3-12 ...........................................

.......................... e ........................................

...................................... e

......................... e .................................

Allowable Stresses)

................... e 4-12, 6-03R (Vol . 7), 6-07, 7-05, 8-16

Cumulative Index - 631.3 Interpretations Vols . 1-10



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a

‘ a

O

a

a

Subject

ASME 831.3 90 W 07596713 0525295 q2T


Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . . l-34, 2-24, 6-03R (Vol. 7) basis for ......................................... .1-56 branch connections ................................. .2-7 for B16.9 tees.. .................................... . l - 7 for fabricated intersections ........................ 1-6, 5-15 for tees ........................... .l-46, 1-55, 1-71, 5-01 for welded elbows .................................. . l - 6

Temperature design minimum temperature ....................... .íO-O2 large changes ..................................... .8-O9 limitations ................................... .4-13, 5-14 reduction ......................................... .4-11

Thermoplastic piping solvent cemented joints ............................. . lo-8 specific requirements .............................. .lo-O6

Tubing joints ............................................. 7-07 limitations .................................... .2-13. 3-6

Thickness Allowances in stress calculations ................................ .1-20

Unlisted components . . . . . . . . . . . . . . . . 1-6, 1-51, 3-6, 4-05, 5-05, 8-7,

materials ................................... see Materials 10-1 8, 10-1 1, 10-07

interpretation Subject No.

Valves Category M Fluid Service. ........................... .8-35 materials ......................................... .8-O7 pressure build up .................................. .8-O4 ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-O5

Visual Examination internal ..................................... .8-10, 8-26 requirements ...................................... .2-28

Washers, Use of ................................... .2-5

Weld examination of welds .............................. .lo-1 5

. . . . . . . . . . . . . . .l-74, 10-1 9 for branch connections . . . . . . . . . . . . . . .2-10, 4-03, 4-14, 8-37

. . . . . . . . . . see Acceptance Criteria

. . . . . . . . . . . . . . . .2-20, 3-1 1, 4-18

.......................... 1-66 reinforcement . . . . . . . . . . . . . . . . . .

socket ...................... ... .6-02, 6-05, 10-1 9

Welding Procedure qualification of . . . . . . . 1-1 2, 1-65, 1-66, 1-76, 4-1 7, 8-23, 8-29 specification ................................. .8-21, 8-22

Cumulative index - 83 1.3 Interpretations Vols. 1 - 1 O



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ASME B3L-3 90 = 0759670 008YB93 B M

ASME B31.3


Replies to Technical Inquiries June i, 1990, Through March 31, i 991

General Information

It has been agreed to publish interpretations issued by the 831 Committee concerning 831.3 as part of the update service.to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies to the Edition or Addenda stated in the interpretation, or if none is stated, to the Edition or Addenda in effect on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. These interpretations are not part of the Code or its Addenda.


MME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee, As stated in the Statement of Policy in the Code documents, MME does not "approve," "certify," "rate," or "endorse" any item, construction, proprietary device, or acthity.

For detailed instructions on preparaion of technical inquiries to the 831 Committee, refer to Appendix Z.


Code Reference and Subject Indexes have been prepared to assi; the user in locating interpretations by location or by subject matter in the Code. They cover interpretations issued from Volume I up to and including the present volume, and will be updated with each volume.

99



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I ASME 831.3 90 H O759670 0084894 T H I

B31.3

Subject Fig . 328.4.4; Branch Pipe Projection into Run Pipe ..................................... Pam 300.1.1, 300.2, MA306.5, and MA323.4; Applicability to a Textile Plant, and

Category M Fluid Service ......................................................... Pam 304.5; Pressure Design of Flanges and Blanks

and Para. 312; Flange Joint Sysîem ................................................ Para. 304.5.1 (b); Flange-General ..................................................... Par a. 331 . 1 . 1 and Table 330.1 . 1. Heat Treatment Requirements for Attadment of

Bellows Expansion Joints to Piping ................................................. Para . 331.1.3 and Table 331 . 1 . 1. Heat Treatment Requirements

of 5% Cr Socket Weid ........................................................... Pam 345.41; Test Pressure. Metallic Piping .......................................... Table 319.3.6 and Appendix D; Flm*bility Analysis for Branch Connecüons ................ Table 3 4 1 . 3 a Reinforcement and Intemat Protrusion Limits ...........................

Paras . 300.1 and 300.2; Applicability to the Transportation of an Emptied System .......... Interpretation

8-28R 9-06

9-02

9-07 9-09

9-05

9-03 9-08 9-01 9-04

File No . 831-90-008* 631-90-030

631-90-026

631-90-034 831-90-033

631-90-029

831-90-027 631-90-031 631-90-25A 831-90-028

I o1



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1 ASME B3l1.3 90 = O759670 0084895 I 1

831.3 Interpretations No. 9 8-28R, 941


Subject:

Date Issued: December 7,1990

ASMUANSI 831.3-1 987 Edition With Addenda Through 831.3~-I 989, Fig. 328.4.4; Branch Pipe Projedon Into Run Pipe

File: 831 -90-008*

Question: In accordance with ASMUANSI B31.3, Fig. 328.4.4 sketch ,”,, is there a maximum distance that the branch pipe can project into the run pipe?

Reply: No. The Code does not specify any requirements other than those given in Fig. 328.4.4 sketch (c). Further requirements are the responsibility of the owner.


Subject:

Date Issued:

File:

Question:

ASMUANSI 831.3-1 987 Edition, With Addenda Through B31.3~-1989, Table 31 9.3.6 and Appendix D; Flexibility Analysis for Branch Connections

November 28,1990

B31-90-25A

1 accordance with ASMWANSI 831.3, para. 31 9.3.6 and Appendix D, is it permissible to use the k- and i- factors for 90 deg. branch connections from Table D-1 for branch connections that intersect the run at angles other than 90 deg. (with or without added reinforcement)?

other than 90 deg. Reply: ASMUANSI B31.3 does not provide specific k and i factors for branch connections at

103



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I ASME 8 3 2 . 3 90 M 0759670 0084896 3 I I

9-02,9-03 831.3 Interpretations No. 9


Subject: ASME B31.3-1990 Edition, Paras. 300.1 .i, 300.2, MA306.5, and MA323.4; Appl- icability to a Textile Plant, and Category M Fluid Service


File: 831 -90-026

Question (I): Is a textile plant which regularly handles caustic chemicals in its manufacturing process covered by ASME B31.3, para. 300.1 .i (c)?

responsibili ty..." Reply (1): Yes. See also the ninth paragraph of the Introduction which begins "It is the owner's

Question (2): Is it a requirement of ASME 831.3-1990 that piping for 30% sodium hydroxide be classified as Category M Fluid Service as defined in para. 300.3?

Reply (2): It is the owner's responsibility to determine which fluid services are to be identified as Category M. See para. 300(b)(l). Appendix M may be used as a guide in making such determinations.

Question (3): Does ASME B31.3, para. MA323.4.2 prohibit the use of a polypropylene flow measuring device in Category M fluid senn'ces?

Reply (3): Yes, if the polypropylene is used as a pressure containing component, not as a liner

Question (4): Does ASME 831.3, para. MA306.5 prohibit the use of a polypropylene insertion

Reply (4): If a flow measuring device is not a fabricated branch connection, para. MA306.5 does

or gasket.

flow measuring device in Category M fluid service?

not apply.


Subject: ASMWANSI 831.3-1987 Edition, With Addenda Through B31.3~-i 989, Para. 331 .I .3 and Table 331 .i .i ; Heat Treatment Requirements of 5% Cr Socket Weld


File: B31-90-027

Question: Are the exceptions in ASME/ANSI B31.3, para. 331 .i .3(b)(2) applicable to the requirements of Table 331 .i .I ?

Reply: Yes.

104



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I A S M E 831-3 90 W O759670 0084897 5 I I I - I

831.3 Interpretations No. 9 9-04,9-05 9-06


Subject: ASMVANSI B31.3-1987 Edition, Table 341.3.2A; Reinforcement and Internal Pro- trusion Limits


File: B31-90-028

Question: In accordance with ASMVANSI 831.3, Table 341.3.2A, may heights of reinforcement and internal protrusion be added together in determining penetrameter requirements for radiograph- ing girth welds?

Reply: Yes.


Subject: ASME B31.3-1990 Edition, Para. 331 .I .i and Table 330.1 .i; Heat Treatment Re- quirements for Attachment of Bellows Expansion Joints to Piping


File: 831 -90-029

Question: In accordance with ASME B31.3, para. 331 .I .I, is it required to postweld heat treat attachment welds joining austentic bellows to P-No. i, 3, 4, and 5 piping (in thickness requiring PWHT) when the bellows material thickness is less than or equal to '/8 in. and the attachment weld is made with austentic weld material?

Reply: Yes, except as permitted by para. 331 2 .2 .


Subject:

Date Issued:

ASMUANSI 831.3-1987 Edition, Paras. 300.1 and 300.2; Applicabiliq portation of an Emptied System

November 28, i 990

File: B31-90-030

to the Trans-

Question: Does ASMWANSI B31.3-1987, para. 300.1.2 address the transportation of a piece of

Reply: Yes.

packaged equipment which includes piping?

105



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I A S M E 831.3 90 W 0759b70 0084898 7 I I I - l

9-07,9-08,949 B31.3 Interpretations No. 9


Subject: ASME B31.3-1990 Edition, Para. 304.5; Pressure Design of Flanges and Blanks and Para. 312; Flange Joint System

Date Issued: November 28, i990

File: B31-90-034

Question: Does ASME B31.3 prohibit the use of raised and flat face metallic flanges in combination?

Reply: No, provided the design of both flanges meets the requirements of paras. 304.5 and 312.


Subject: ASME B31.3-1987 Edition, Para. 345.4.2; Test Pressure, Metallic Piping

Date issued: December 7, i990

File: B31-90-031

Question: Does a component built to a manufacturer’s own standard require shop pressure

Reply: ASME B31.3 does not address the pressure testing of individual unlisted components by

. . - testing per &ME B31.3?

the manufacturer.


Subject:


ACME 831.3-1 990 Edition, Para. 304.5.1 (b); Flange-General

File: 831-90-033

Question: When designing aluminum flange, in accordance with ACME 831.3, para. 304.5.1 (b), is it permissible to design them in accordance with ASME Section VIII, Division 1, Appendix 2, not considering the large difference in modulus of elasticity between steel and aluminum?

Reply: Yes, however; see also para. 300(c)(2).

1 O6



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CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME B31.3-1990 Edition . References in brackets are to



No . - Code Reference Interpretation

No . - Introduction ............................... . l-3, 1.6. 1-7 300 ......................................... 7.10. 8-17 300(b) ....................... .1.26. 1.32. 4.08. 5.03. 8-09 3 0 0 ( ~ ) ............ .3.2. 3.4. 4.10. 6-03R (Vol . 7). 7.05. 8-30 30Oíd [3001e)] ............................. .1.3. 1.6. 1-7 300.1 .................................. .7.10. 8-1 7. 9-06 300.1.1 ........ .1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8.01. 9-02 Fig . 300.1.1 ................... .1.8. 1.19. 2.26. 7.10, 8-17 300.1.3 [300.1.4] ................ .1.8. 1.16. 1.19. 1.26. 3-2 300.2

Category D fluid service ................ .4.13. 5.03. 6-01 Category M fluid service ...... .1.40. 1.73. 6.01. 8.09. 9-02 notch-sensitive ................................... 2.22 owner .......................................... 2-30 piping components ........................... .3.2. 8-01 piping system .............................. .1.30. 9-06 severe cyclic conditions ...................... .5.12. 8-09

301 .............................................. 5-11 301.2 ......................................... 2.3. 7-01 301.2.1 .......................................... -2-29 301.3 .............................................. 2-3 301.3.2 ........................................... 4-11 301.5.3 ........................................... 4-07 301.7.2 ............................................ 3-4 302 .............................................. 1-32 302.2 ............................................. 1-50 302.2.4 [302.2.3] ..................... 1.3. 1.32. 2.14. 3.4.

4-1 1. 7.01. 7.04. 8-04 302.3.2 ...................... .1.18. 1.38. 2.16. 3.13. 8-25 302.3.4 ........................................... 2-20 Table 302.3.4 ...................... .1.42. 1.78. 2.20. 3-1 1 302.3.5 .................. 1.20. 1.50. 2.14. 2.15. 2.24. 3.4.

4.10. 4.12. 6-03R (Vol . 7). 6.07. 7.04. 7.05. 8-16 302.3.6 ........................... .1.50. 2.15. 2.16. 2-1 7 302.4 ............................................. 1-20 303 .............................................. 6-05 304.1.1 ................................ .1.42. 1.54. 1-70 304.1.2 ....................... 1.42. 1.57. 1.68. 1.70. 2-11 304.2.3 ..................................... .1.22. 5-1 1 Fig . 304.2.3 ....................................... 1.22 304.3 .............................. 1.21. 1.46. 5.01. 6-09 304.3.2 ............................................ 4-05 304.3.3 ........................... .4.03. 7.02. 8.06. 8-37 Fig . 304.3.3 ....................................... 8.37 304.3.4 ...................... .1.21. 1.37. 1.55. 1.75. 2-27 Fig . 304.3.4 ....................................... 1.70


304.5 ......................................... 3-4, 9-07 304.5.1 ........................................... 8-18 304.5.1 (b) ......................................... 9-10 304.7.2 . . . . . . . . . . . . . . . . . . .l-51, 3-2, 4-05, 5-05, 5-1 1, 6-09 304.7.4 ........................................... 1-16 305.2 .......................................... 3-8, 3-9 305.2.1 ........................................... 1-38 305.2.3 ..................................... .6-01, 7-03 308.2.1 ........................................... 5-12 308.2.4 ........................................... 5-12 311.2.4 ..................................... .6-02, 6-05 312 .............................................. 9-07 314.2.1 ........................................... 2-22 Table 314.2.1 ...................................... 8-33 315.2 .............................................. 3-6 315.3 .............................................. 3-6 317.2 ............................................. 1-17 318 .............................................. 8-13 Table 319.3.6 ...................................... 9-01 319.2.1 ........................................... 2-17 3 19.2.3 ..................................... .7-04, 7-05 319.3.5 ........................................... 4-10 319.3.6 ........................ . l-6, 1-7, 1-55, 2-24, 5-15 319.4.1 ........................................... 1-33 319.4.4 .................................. 1-71, 2-7, 2-24 319.7 ....................................... .l-16, 7-05 321.1.1 ........................................... 6-07 321.1.4 ........................................... 1-49 322.6.3 ........................... .l-32, 2-21, 2-29, 7-01 323.1.1 ........................................... 8-19 323.1.2 . . . . . . . . . . . . . .l-11, 1-15, 1-48, 2-1, 6-06, 8-07, 8-19 323.2 .............................................. 3-9 323.2.1 ........................................... 1-13 Table 323.2.2

[Table 323.2.11 ................... 1-12, 1-48, 1-65, 1-76, 2-19, 3-8, 4-01, 4-15

323.2.4 ........................................... 6-06 323.3 ........................................ 1-76, 5-13 Table 323.3.1

[Table 323.2.21 . . . . . . . . . .l-12, 1-76, 4-17, 5-19, 5-21, 8-29 323.3.4 ........................................... 8-30 323.3.5 ............................................ 2-9 Table 323.3.5 ...................................... 5-14 Table 326.1 ................... . l-iT, 1-51, 2-3, 8-07, 8-34 328 .............................................. 7-02 1 328.2 [327.5] ...................................... 1-66



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1 IASME B3I-3 90 07.59670 0084900 I '1 ~~

I

Interpretation N O . Code Reference -

328.2.1 [327.5.1, 327.5.21 . . . . . . . . . . . . . . . . .1.76. 4.17. 8-29

328.5 [327.4] ...................................... 5.09 328.5.1 [327.4.1] ................................... 5.17

Figure 328.4.4 ............................... .8.28. 9-08

328.5.2 [327.4.2] ................................... 5.12 Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . .1.28. 5.12. 6.02. 6.05. 8-27 328.5.4 [327.4.4]. . . . . . . . . . . . . . . . . . . 1.59. 1.74. 2.10. 4.03.

4-1 4. 7.08. 8-1 3 Fig . 328.5.4 [Fig . 327.4.41 ....... .1.59. 1.74. 4.03. 4.16. 7-08 328.6 ............................................. 2-18 330 .............................................. 8-21 330.1 ............................................. 8-23 Table 330.1.1 ...................................... 9.05 331 .............................................. 8-12 331.1.1 ...................................... 8.08. 9-05 Table 331.1.1

[Table 331.3.11 . . . . . . . . . . . . . . . .1.69. 2.2. 5.06. 8.24. 9-03 331.1.2 ........................................... 8.05 331.1.3 [331.3.6] . . . . . . . . . . . . . . .1.39. 1.59. 4.06. 5.06. 9-03 331.1.4 [331.1.2]. .................................. 5.08 331.1.6 [331.3.4] ................................... 5.08 331.1.7 [331.3.2] ............................. .1.78. 8-22 331.2.2 [331.1.1]. ............................ .1.39. 1-78 331.3.4 ........................................... 8-05 331.3.7 ........................................... 8-05 332.1 ............................................. 8-03 332.2 [329.1] ...................... .1.23. 1.53. 4.02. 8-20 332.4 [329.3, 330.21 ................................. 2.2 335.2 .............................................. 2-5 340.2 [336.1.2] .................................... 1.26 340.3 [336.3] ...................................... 1.10 340.4 [336.2] ...................................... 1-31 341.2 (336.1.1, 336.1.31 . . . . . . . . . . . . . .1.10. 1.26. 1.27. 2-28 341.3.1 [336.5] ............................... .1.64. 2-4 341.3.2 ........................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 ............................ 5.09 Table 341.3.2A

[Table 327.4.1AI . . . . . . . . . . 1.1. 1.9. 1.14. 1.41. 2.8. 5.04. 5.13. 5.16. 5.17. 5.18. 5.20. 6.04.

7.06. 8.32. 8.38. 9-04 Table 341.3.28 [Table 327.4.163 . . . . . . . . . . . . . . . . .5.18. 6-04 341.3.4 [336.5, 336.5.41 . . . . . . . . . .1.62. 2.25. 2.32. 3.5. 3-14 341.4 [336.5] ...................... .1.24. 1.45. 3.12. 5-20 341.4.1 [336.5.1] . . . . . . . . . . . . . . 1.10. 1.26. 1.27. 1.60. 2.12.

2.28. 3.7. 3.12. 4.12. 5.10. 8.02. 8.10. 8-26

341.4.2 ........................................... 8-38 341.4.3 ........................................... 8-10 341.5 ............................................. 8-38 341.5.1 [336.6.1] .............................. .1.5. 3-12 342.1 t336.4.11 .................................... 2.28 343 [336.4.1] ...................................... 2.28 344 [336.4] ....................................... 5-09 344.2 [336.4.2] ......................... .2.28. 8.10. 8-26 344.5 [336.4.5] ......................... .1.10. 1.60. 2-12 344.6 [336.4.6] .................................... 1.60

Code Reference

344.7 [336.4.7] .............................. .2.28, 3-14 345 [337] ...................... .1.2. 1.72. 2.31. 3.3. 8-31 345.1 [337.1] . . . . . . . . . . . . . . . . . . .1.4. 1.30. 4.04. 6.08. 8-15

345.2.4 [337.4.3] ................................... 1.35 345.2.6 [337.1] ............................... .1.2. 5-22 345.3 [337.3] ............................ .2.6. 3.10. 5-02 345.4 ............................................. 8-04

345.2.2 ........................................... 8.31

345.4.2 [337.4.1] . . . . . . . . . .1.35. 1.61. 1.63. 2.23. 4.04. 9-09 345.4.3 [337.4.2] .................................... 1.63

345.8 [337.6] ................................ .1.25. 3-10 345.9 [337.5.1] .................... .4.09. 5.07. 6.08. 8-15

345.5 [337.4.4] ......................... .1.35. 1.43. 6-08 345.7 [337.5.2] .................................... 1.36

............................................. e .......................................... A304 8.14 A304.5.1 1-67 A314 ............................................. 8-33 A327.2.4 .......................................... 7-09 A328.2.1 ......................................... -8-14 A328.5 ........................................... 8-14 K315 ............................................. 7-07 K322.3 ........................................... 7-07 Fig . K328.5.4 ...................................... 8-37 M307.2 ........................................... 8-35 M322.3 ....................................... 2.13, 3.6 M323.1.3 .......................................... 3-7 M326 ............................................ 2-13 M335.4 [M335.5, M335.61 ........................... -3-6 M341.4 [M336.5] ............................ .l-24, 1-45 M341.4.1 [M336.5.1] .......................... .2-28. 3-7 M345.1 ........................................... 6-08 MA306.5 .......................................... 9-02 MA323.4 .......................................... 9-02 MA323.4.2 ........................................ 8-35 Appendix A Notes

(No equivalent) [(i 4)] .............................. 2-20 Note (1 7) ...................................... -4-18 Note (20) [(30)] .................................. 1-77 Note (57) [(2)] .................................. -1-58

Table A-1 [Table i] . . . . . . . . . . 1-13; 1-18. 1-29. 1-38. 1-48. Appendix A

1-77. 2-1. 3-8. 3-9. 3-13. 4-12. 4-13. 6-01. 6-06. 7-03. 8-1T.

8-18. 8-25. 8-34. 8-36 Table A-16 [Table 11 . . . . . . . . . . . . . . .l-78. 2-20, 4-18, 7-03

Appendix D .................... 1-6. 1.7. 1.34. 1.46. 1.55. 1.56. 1.71. 2.7. 2.24. 4.16.

5.01. 5-1 5. 6-06 Appendix E [Appendix K I ...................... .1.44. 5-10 Appendix F tF323.21 ................................ 1-29 Appendix C ....................................... 5-12 Appendix H ....................................... 8-06 Appendix J ........................ . l-28, 1.54. 1.75. 5-04 Appendix M ................................. .6.01. 8-09 Case 137 ........................................... 3-1 Case i 4 1 .......................................... 1-51




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a . SUBJECT INDEX

Subject . Interpretation

No.

Acceptance Criteria pressure tests ...................... L ............... . l -2 weld ...................... 1.1. 1.9. 1.14. 1.41. 2.8. 5.09.

5.13. 5.17. 5.18. 5.20. 6.04. 7.06. 8-32

Allowable Stresses ................................. 4.12 bases for ........................... 1-1 8. 3-1 3. 8-1 1. 8-25 for ASTM A 312 .................................... 1.29 for ASTM A 387 .................................... 8.25 for ASTM A 570 ................................... -1-38 for ASTM A 587 .................................... 1.13 for ASTM A 671 .................................... 1-48 for ASTM B 464 .................................... 8-11 for austenitic stainless steels ........................... 3.13

Alternative Tests for Category D fluid service .......................... 1.36 requirements ....................................... 8.15 sensitive leak test ................................... 1.25

Authorized Inspector . . . . . . . . . . . . . . . . see Owner's Inspector

Bending .................................... .4.02. 8-03

Bends corrugated ........................................ . l-23 miter ................................... see Miter Bends reduction of outside diameter ......................... 8.20

Bonding Qualification Test hot gas welded ..................................... 8.14 minimum burst pressure ........................ .7.09. 8-14 solvent cement .................................... 8.14

Bonds heat fusion ........................................ 8.14 hot gas welded ..................................... 8.14 test assembly ...................................... 7.09


Branch Connections extruded outlets ......................... .1.37. 2.27. 6-09 flexibility analysis ................................... 9.01 integrally reinforced fitting ............................ 4.05 projection into run pipe ........................ .8.28, 9-03 reinforcement ................................ .8.06. 8-37 weld requirements ............. .2.10. 4.03. 4.14. 7.02. 7-08 a


No . -

IASME B3L.3 90 = O759670 OO B Y 9 O L 3 I I .

.

Brazed Joints for flammable service ................................ 1-17

Buckles ...................................... 1.23. 1-53

Category D Fluid Service alternative pressure test for ........................... 1-36 limitations ................................... .4.13. 5-03 radiographic examination ............................. 8.38

Category M Fluid Service clarification of term ........................... .1.73. 9-02 double contained piping .............................. 8.35 leaktest ........................................... 6-08 liquid oxygen ...................................... 8-09 requirements ................................. .8.35. 9-02 tubing size limitations ................................ 2.13 "very small quantity" ............................... . l-40

Code Coverage 831.3 versus B31.4 ........................... .1.47. 7-10 general hydrocarbon service .......................... 6.01 in-line sensing devices ............................... 8.01 new and replacement piping .......................... 5.22 offshore platform ................................... 8.17 oil heating system ................................... 4.19 synfuel plant piping ........................... . l-52, 2-26 tobacco plant piping .................................. 3.1


certification .............................. .1.26. 3.7. 5-10 design conditions .................................... 2.3 flexibility cháracteristic ............... .1.55. 1.56. 2.24. 5-01 in-line sensing devices ............................... 8.01 referenced standards .......................... .1.44. 5-10

and valves)

Compressors internal piping ...................................... . 1-8


Cyclic Loading .................................... 5.12


conditions .......................................... 2-3 Lame theory ....................................... 1.57

Design)




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IASME 631.3 70 0759b70 0084702 5 - 1

Interpretation Interpretation No . . No. Subject . Subject




Examination extent of .................................... .1.24, 5-18 in process ......................................... 3.14 progressive .................... .see Progressive Examination radiographic . . . . . . . . . . . . . . . . . . see Radiographic Examination random ........................... 1.27. 1.45. 1.62. 2.12.

required ................................ . l-24, 1.60. 6-04

visual ....................................... .2.28. 8-10

Exclusions for compressors and internal piping ..................... 1.8 for interconnecting piping ............................ 1.19

2.32. 4-1 2

S p o t .............................................. 1-62

Expansion Joints ................................... 1-1 6

Extruded Outlet pressure design of ............................. . l-2 1. 1-70 tees considered as .................................. 1.55


Fillet Weld internai. slip-on flange ............................... 8.27 pressure containing .................................. 8.13 size .............................................. 1-74

Fittings

conforming to two grades ............................ 8.18 flared, flareless. or


816.9 ....................................... .1.7. 5.01

MSS SP-75 ........................................ 1-11


Flanges assembly ........................................... 2.5 design ................................... .1.67. 3.4. 9-7 general ........................................... 9.1 O long welding neck .................................. 4.05 slip-on ...................................... .5.12. 8-27 use of aluminum .................................... 1.51 use of raised and flat face metallic ..................... 9.07

Flexibility Analysis branch connections ................................. 9.01 exemptions from .................................... 1-33


diameters ........................................ i -56 for a tee ............................... .l-55. 1.56. 5-01 for components not listed

in Appendix D ............................. .1.55. 2-24

Flexibility Factors basis for ......................................... -1-56 for B16.9 tees. ...................................... 1-7 for fabricated intersections .................. . l-6, 4-16. 5-15 for welded elbows ................................... 1-6

Fluid Service general hydrocarbon ................................ 6-01 responsibility for

categorizing ................................ .4.08. 8-09


onset ........................................... 1-58

Hardness limitations on ....................................... 2-2 records ........................................... 8.22

Heat Treatment cooling rate ........................................ 1-69 for austenitic stainless steel .......................... . l-65 for bending and forming .............................. 2.2 for valve parts ...................................... 8.12 governing thickness . . . . . . . . . . . . . . . . . . l-39, 1.59,4.06, 5-06 heating rate ....................................... .1.6 9 . local ....................................... .5.08, 8-05 monitoring ................................... .5.08. 8-05 requirements . . . . . . . . . . . . . .8.08. 8.21. 8.23. 8.24. 9.03. 9-05 SP-1 through SP-5 .................................. 8.24 when radiography is

required ..................................... 1.64. 2-4


Impact Tests absorbed energy data ................................. 2.9 alternative methods ................................ -8-30 base metal ......................................... 4.01 exclusions from ......................... . l-76, 5-1 4. 8-30 heat treatment required .............................. 5.19 in qualifying procedures .............................. 8.29 of aluminum filler metals ............................. 2.19 of austenitic stainless steel ............................ 1.65 of bolting materials .................................. 4.15 of the heat affected zone ....................... .l176, 5-21 of weldments ...................... .1.12. 1.65. 1.76. 5-21 temperature limitation ......................... .5.14. 8-30

Imperfections (see also Acceptance Criferia) concave root surface ........................... .1.1. 6-04 determination of .................................... 8.32 lack of fusion ...................................... 5.09 porosity ............................ .1.9, 5.13, 5.16, 5-20 slag inclusion ...................................... 5.20 tungsten inclusions ............................. .1.9, 5-17 undercutting ............................. .1.14. 2.8. 6-04

Installed Piping .................................... 1.30

íd) Cumulative Index . 831.3 Interpretations Vols . 1-9



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IASME 8 3 3 . 3 70 = O757670 O084703 7 II 1

Subiect

I I


Instrument Piping ............................ a .7.07. 8-01

Internal Piping, Equipment .......................... . l-8



welds ................................ . l-78, 3-1 1 . 8-06

ASTM A 312. ASTM A 403 ......................... 2.20

Joints circumferential bands ................................ 5.11 exposed during test ............................ .2.6. 3-10 instrument tubing ................................... 7.07 special ............................................ 8.13

Lateral Fittings ...................................... 1.6

leak Tests acceptance criteria .................................. . l-2 alternative ......................... .4.09. 5.07. 6.08. 8-15 as nondestructive examination ......................... 8.31 for Category D fluid service .......................... 1.36 for system designed for

isolation of test pump ................................. 1.2 leakage í -4 minimum hydrostatic test

pressure .................................... 2.23. 4-04 minor repairs and additions ............................ 1.2 of discharge piping ................................. . l-72 of newly constructed

systems .......................... .1.4. 5.02. 5.22. 8-15 of piping and vessel ................................ . l-63 of piping connecting

equipment ........................................ 3.3 of replacement piping ............................... 5.22 painting before test ........................ .2.6. 3.10. 5-23 personnel qualification ............................... 8.3 1 preparation for ...................... .2.6. 3.10. 5.02. 5-23 reduced pressure

(hydrostatic test) ............................ .1.61. 2-23 sensitive .......................................... 1-25 temperature correction for .1.35. 1-43

O psi ........................................... 2.31

............................................

a ......................

Lethal Substance ................................... 1.73

Limitations on imperfections ......................... see Imperfections on hardness ........................................ 2.2 on tubing size ................................. .2.13, 3-6

l o w Temperature Requirements ......................... see Impact Tests a


No . - Materials API 5L .............................. 1.78. 2.4. 3.9. 3.11.

6.01. 6-06 API 5tX ............................................ 2-4 ASTM A 234 ...................................... 2-20 ASTM A 312 ........................... .1.29. 1.77. 2-20 ASTM A403 ................................. 1.77. 2.20 ASTM A 487 ...................................... 8-07 ASTM A 537 ....................................... 2-1 ASTM A 570 ...................................... 1-38 ASTM A 587 ...................................... 1-13 ASTM A 633 ...................................... 1-11 ASTM A 658 ....................................... 3-8 ASTM A 671 ...................................... 1-48 ASTM B 241 ....................................... 2-19 ASTM B 337 ....................................... 4-18 certification ................................... 5.1 O. 8-02 conforming to two grades ...................... .8.18. 8-34 notch sensitive ..................................... 2.22 reidentification ..................................... 8.19 toughness requirements .............................. 5.19



explanation of ...................................... 1-33

Nomenclature d ................................................ 1.54 T ................................................ 1-28 t , ................................................ 1-75 . T,,, .......................................... 5.04. 5.16

Nonmetallic Piping in Category M Fluid Service ......................... -8-35 joint requirements ............................. .7.09. 8-14


Occasional Variations (pressure/temperature allowances) . . . . . . . . l -3, 2-1 4. 4-1 1

loads ............................. .1.50. 2.15. 2.16. 2-17


Owner’s Inspector qualifications of .................................... 1.31 responsibilities of .................................. . l-26

Pipe elbowless ......................................... 8.03 in corroded condition ............................... 2.15 made from piate .............................. .1.48, 8-36 of noncircular cross section ............................ 3.2 pressure testing ..................................... 9.09 spiral welded ...................................... 7.03

Cumulative Index . B31.3 Interpretations Vols . 1-9 (e)



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IASME B3L-3 90 W 0757b70 OOBL1904 9 I I .



Plastic lined pipe . use of screwed flanges . . . . . . . . . . . . . . . . . . . 8.33 pipe supports ...................................... 1-49


Positions qualification of welding ............................. . l-66



Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ............................ 1.68 of extruded headers ........................... .1.21, 1-70 of miter bends ..................................... 1.21 of pipe ............................ 1.42, 1.54, 1.57, 1.68.

of valves ......................................... -8-04 1.70, 2-1 1

Pressure Rating valve ............................................. 8.04 variations .......................................... 4-11

Pressure Relief Devices acceptable devices ............................ .2.21. 2-29 setting ...................................... .1.32. 7-01



Pressure Test ............... _ ..... -__.- .-. -.-. s e c L e a k J e s t

Progressive Examination . . . . . . . . . . . . . . . . . . . . l-5, 1.62. 3-5



as supplementary examination ......................... 8-38 random radiography ................. 1-27. 1-45. 1-62. 2-12.

records ........................................... 1-10 requirements ....................................... 6-04 selection of welds for

examination ...................................... 2-25

100% . . . . . . . . . . . . . . . . . . .......................... 5-09

2-32, 3-12

spot radiography .............................. .1.62. 3-1 2 ~ ~~

-when PWHT isrequired . T. ................. . . .1.64. 2-4

Records certification .................................. .5.10. 8-02 of hardness tests .................................... 8.22 for radiographic examination .......................... 1-1 O retention of ........................................ 1-1 O

I


No . - Reinforcement. Branch attachment weld .............................. .4.03. 7-08 clarification of terms ................................. 1.37 limits of ..................................... .2.27. 9-04

Repairs to welds .......................................... 2-18

Safeguarding ..................................... -5-1 2


Seismic loads .................................... -4-07 stresses due to ..................................... 2-17



Sfandard Components manufacturers markings ......................... .3-7. 8-02 valves ................................. .5-05, 8.04, 8-07

Standards compliance ........................................ 5.10 superseded ........................................ 1.44

Stresses (see also

displacement stress range ............................. 7.04 due to cold spring .................................. 8.16 due to occasional loads .............................. 2.16 due to pressure surges .............................. . l-50 due to seismic loads ................................. 2-17 due to thermal gradients .............................. 3-4 longitudinal . . . . . . . . . . . . . . . . . . . 1-20, 1-50, 2-1 5, 2-24, 4-1 O,

Allowable Stresses)

4~17!!;-s-o3RV~~;7),6;07, 705, 8-1 6

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . .1.34. 2.24. 6-03R (Vol . 7) basis for .......................................... 1-56 branch connections .................................. 2.7 for 616.9 tees ....................................... 1.7 for fabricated intersections ....................... . l-6, 5-15 for tees ........................... .1.46. 1.55. 1.71. 5-01 for welded elbows .................................. . 1-6

Temperature large changes ...................................... 8-09 limitations ................................... .4.13. 5-14 reduction .......................................... 4.11

Tubing joints ............................................. 7-07 limitations .................................... .2.13. 3-6

Thickness Allowances in stress calculations ................................ . l-20

(f) Cumulative Index . B31.3 Interpretations Vols . 1-9



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- IASME B3L.3 90 0759b70 0084905 O - 1

Subject

Unlisted components . . . . . . . . . . . . . . . . . a

Interpretation - No. Subject


1-6, 1-51, 3-6, 4-05, 5-05, 8-7 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Materials

Valves Category M Fluid Service. . . . . . . . . . . . . . . . . . . . . . . . . . , . .8-35 materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-O7 pressure build up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-O4 ratings ............................................5-O5

Visual Examination internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10, 8-26 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28

Washers, Use of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O 2-5

Weld fillet size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-74 for branch connections . . . . . . . . . . . . . . .2-10, 4-03, 4-14, 8-37 imperfections . . . . . . . . . . . . . . . . . . . . . . see Acceptance Criteria longitudinal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20, 3-1 1, 4-18 qualification of position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l -66 reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-O8 repair ............................................. 2-18 socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-02, 6-05 spacing of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-O2

Welding Procedure qualification of . . . . . . . 1-1 2, 1-65, 1-66, 1-76, 4-1 7, 8-23, 8-29 specification . . . - -. . . . . . . . . . . . . . . . . . . . . . . . . . . , .8-21, 8-22

Cumulative Index - 831 -3 Interpretations Vols. 1-9



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-90 O759670 0084906 2 - 1

A3790 B



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. --

' A S M E B3L.3 90 m 0759b70 0085060 T m i


Replies to Technical Inquiries May i , i 989, Through May 31 , i 990

General Information

It has been agreed to publish interpretations issued by the 831 Committee concerning B31.3 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. Each interpretation applies to the Edition or Addenda stated in the interpretation, or if none is stated, to the Edition or Addenda in effect.on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. These interpretations are not part of the Code or its Addenda.

These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity, In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply bearing the original interpretation number with the suffix R is presented.

ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not "approve," "certify," "rate," or "endorse" any item, construction, proprietary device, or activity.

For detailed instructions on preparaion of technical inquiries to the 831 Committee, refer to Appendix Z.

Code Reference and Subject Indexes Code Reference and Subject Indexes have been prepared to assist the user in locating

interpretations by location or by subject matter in the Code. They cover interpretations issued from Volume i up to and including the present volume, and will be updated with each volume.

79



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I A S M E B 3 3 - 3 90 0759b70 0085063 3 ar

B31.3

Subject Interpretation Fin . 328.4.4: Branch Pipe Proiection Into Run Pipe ..................................... 8-28 Fig . 328.5.26; Double-Weld& Slip-On Flange i Dimension ............................ Paras. 300 and 300.1 and Fig . 300.1.1, Applicability - Offshore Platform .................

Temperature Changes., .......................................................... Below -320.F ..................................................................

Paras . 300.1 . 1 and 300.2; Rules for In-line Sensing Devices ............................. Paras . 302.2.4 and 345.4; Maximum Allowable Valve Body Cavity Pressure ................ Para . 302.3.2 and Table A-I; Stress Value for A 387. Grade 9. Classes 1 and 2 ............. Para . 302.3.5; Stresses due to Cold Spring ............................................ Para . 304.3.3 and Appendix H; Branch Reinforcement .................................. Para . 304.3.3 and Figs . 304.3.3 and K328.5.4; Area Replacement - Definitions ........... Para . 304.5.1 and Table A-I; Materials/Fittings - Use of Two Grades ....................

Para . 323.1.2 and Table 326.1; Material for Valve Body and Internals ..................... Para . 330.1; Preheat Temperature - Procedure Qualification ............................

Paras . 300(b) and 300.2 and Appendix M; Classification of Fluid Service. large

Paras . 300(c)(2) and 323.3.4; Impact Testing Methods and Acceptance Criteria

Paras . 318 and 328.5.4; Fillet Welds., ............................................... Paras . 323.1.1 and 323.1.2; Material Reidentification ................................... Para . 330; Preheat Requirements - Welding Procedure Specification ..................... Para . 331.1.1; Postweld Heat Treatment .............................................. Paras . 331.1.2, 331 -3.4, and 331.3.7; Temperature Monitoring of Stress

Relieving of Pipe Welds in Series .................................................. Para . 331.1.7; Hardness Tests - Procedure Qualification Records ........................ Para . 332.1; Use of Elbowless Steel Pipe in 631.3 ...................................... Para . 332.2.1; Bends - Requirements for ............................................. Para . 341.3.2 and Table 341.3.2A; Acceptance Criteria - Liquid Penetrant and

Magnetic Particle., .............................................................. Paras . 341.4.1 and 344.2; Visual Examination - Small Bore Piping ....................... Para . 341.4.1 (c); Certifications and Records., ......................................... Paras . 345 and 345.2.2; leak Test as Nondestructive Examination ........................ Paras . 345.1 and 345.9; Leak Testing ................................................. Paras . A304. A328.2.1, A328.2.5 and A328.5; Bonding Qualification Test.

Joint Limitations .................................................................

Paras . 341.4.1, 341.4.3, and 344.2.1; Visual Examination - Interna! Inspection ............ Paras . 341.4.2 and 341.5 and Table 341.3.2A; Category D Fluid Service ..................

Para . A314 and Table 314.2.1; Plastic Lined Pipe - Use of Screwed Flanges .............. Paras . M307.2 and MA323.4.2; Category M Fluid Service - Double Contained

Piping; Use of Valves ............................................................ Postweld Heat Treatment - Seal Welding ............................................ Table 323.3.1 and Para . 328.2.1; Impact Requirements in Qualifying

a Welding Procedure ............................................................ Tables 326.1 and A-I; Dual Certified Materials and Components ......................... Table 331.1.1; Heat Treatment Requirements .......................................... Table A-I; Minimum Ultimate Tensile Strength and Allowable Stresses for ASTM

6 464. Grade 20 Cb ............................................................. Table A-1; Use of Plate Material for Pipe ..............................................

8-27 8-1 7

8-09

8-30 8-01 8-04 8-25 8-1 6 8-06 8-37 8-1 8 8-1 3 8-1 9 8-07 8-21 8-23 8-08

8-05 8-22 8-03 8-20

8-32 8-26 8-10 8-02 8-38 8-31 8-1 5

8-14 8-33

8-35 8-12

8-29 8-34 8-24

8-1 1 8-36

File No . 631-90-008 631-90-007 631-89-017

6 3 1 8 -89-01

831-90-010 631-88-0286 631-89-007 631-89-051 631-89-036 631 -89-009 6 3 1 7 -90-01 631-89-033 631-89-028 631-89-043 631-89-010 631-89-045 631-89-047 6 3 1 3 -89-01

631 -89-008 631-89-046 B31-89-006 631-89-044

631-90-012 631 -90-001 631-89-019 631-88-030 631-89-049 6 3 1 1 -90-01 631-89-035

631-89-034 6 3 1 3 -90-01

631-90-015 631-89-023

631-90-009 631-90-014 631-89-050

631 -89-020 631-90-01 6

81



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: ASME 8 3 3 . 3 90 0759670 O085062 3 I

8-01, 8-02, 8-03 831.3 Interpretations No, 8

Interpretation: 8.01

Subject: ASMUANSI 831.3-1 987 Edition, Paras. 300.1 .i and 300.2; Rules for In-Line Sensing Devices

Date Issued: May 22, 1989.

File: 831 -88-0288

Question: Shall the. pressure containing piping cbmponents of an in-line sensing device be designed, fabricated, examined, and tested in accordance with the rules of ASMUANSI 831.31

Reply: Yes; see the definitions for "piping" and "piping components" in ASMUANSI 831.3, para. 300.2. See also para. 300.1.1.


Subject:


ASMWANSI 831.3-1987 Edition, Para. 341.4.1 (c); Certifications and Records

File: 831 -88-030

Question: In accordance with ASMUANSI B31.3, para. 341.4.1 (c), can manufacturers' markings on pipe, fittings, and components be regarded as confirmation of material compliance with the specifications?

Reply: Yes.


Subject: ASMUANSI 831.3-1 987 Edition With Addenda Through B31.3b-I 988, Para. 332.1 ; Use of Elbowless Steel Pipe in 831.3


File: 831 -89-006

Question: In accordance with ASMUANSI 831.3 is the use of pipe bending permitted?

Reply: Yes; see ASMUANSI 831.3, para. 332.1.

83



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' ASME 831.3 90 W 0759670 0085063 5 W '



Subject: ASMVANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Paras. 302.2.4 and 345.4; Maximum Allowable Valve Body Cavity Pressure


File: B31-89-007

Question: In accordance with ASME/ANSI 831.3, what is the maximum pressure buildup relative to the pressure rating of the valve permitted in the valve body cavity?

Reply: 133% of the pressure rating of the valve provided that all of the requirements of ASME/ ANSI 831.3, para, 302.2.4 are met. Also see para. 345.4 for pressure test requirements.


Subject: ANSVASME B31.3-1984 Edition, Paras. 331 .I .2,331.3.4, and 331.3.7; Temperature Monitoring of Stress Relieving of Pipe Welds in Series


File: 831 -89-008

Question: Several identical welds in a single assembly are eparately locally heat treated using electrical resistance heaters in series. In accordance with ANSVASME 831.3, paras. 331 .I .2 and 331.3.4 is a temperature measurement of each weld required?

Reply: Yes.


Subject: ASMVANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Para. 304.3.3 and Appendix H; Branch Reinforcement


File: B31-89-009

Question: In accordance with ASME/ANSI B31.3, para. 304.3.3, is the weld joint factor €j for calculating 'the required thickness of the branch tb always equal to I .O whether the branch is lon- gitudinally welded or not?

Reply: No. The weld joint quality factor i', for the branch in accordance with para. 302.3.4 shall be used.

Note: Example H-2 of Appendix H will be reviewed by. the. Committee far possible revision.

84



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jASME B3L.3 70 m 0757670 0085064 7 m



Subject: ASMVANSI 831.3-1 987 Edition With Addenda Through B31.3b-I 988, Para. 323.1.2 and Table 326.1; Material for Valve Body and Internals


File: 831 -89-01 O

Question (1): Is ASTM A487-IC (formerly A487-IQ) an acceptable material for valve bodies

Reply (1): Yes, if qualified as an unlisted material in accordance with ASMUANSI B31.3, para.

Question (2): Are valve internal materials covered by ASMVANSI B31.3?

Reply (2): ASME/ANSI 831.3 does not cover valve internal components except by reference to

within the scope of ASME/ANSI B31.3S

323.1.2.

valve standards listed in Table 326.1.


Subject: ASMUANSI B31.3-1987 Edition, Para. 331 .I .I; Postweld Heat Treatment


File: 631 -89-01 3

Question: In accordance with ASMVANSI 831.3, para. 331 .I .i, is postweld. heat treatment required in the welding procedure specification for P-No. I materials when postweld heat treatment is needed solely for the type of service?

Reply: Yes, and the requirements for postweld heat treatment should be specified in the engineering design.

85



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ASME B31.3 90 W 0759670 0085065 7 M



Subject: ASMVANSI B31.3-1987 Edition With Addenda Through B31.3b-I 988, Paras. 300(b) . and 300.2, and Appendix M; Classification of Fluid Service, Large Temperature Changes


File: B31-89-018

Question (I): Is it a requirement of ASMVANSI B31.3 that piping for liquid oxygen (LOX) at - 2 9 7 O F and 6000 psig be classified as Category M fluid service as defined in para. 300.2?

Reply (I): No; it is the owner’s responsibility to determine which fluid services are to be identified as Category M. See para. 300(b)(I 1, Appendix M may be used as a guide in making such determinations.

Question (2) : Does ASMEIANSI. B31.3 require that piping which undergoes a large, rapid temperature change be considered to experience severe cycle conditions as defined in para. 300.2?

Reply (2): No.


Subject: ASMUANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Paras. 341.4.1, 341.4.3, and 344.2.1; Visual Examination - Internal Inspection


File: B31-89-019

Question: Is it the intent of ASMUANSI B31.3, paras. 344.2.1,341.4.1 , and 341.4.3 that random or 100% visual examination of weld internal surfaces requires indirect observation by aids such as borescopes?

Reply: No. The intent of ASMUANCI B31.3, para. 344.2.1 is that the phrase “...or can be exposed to view ...” refers to direct visual examination.

86



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' A S I E B3L.3 90 0759670 0085066 O I- ~ ~~~ -

1

831.3 Interpretations No. 8 8-1 1 , 8-1 2/8-13


Subject: ASMUANSI 831.3-1 987 Edition, Table A-I ; Minimum Ultimate Tensile Strength and Allowable Stresses for ASTM B 464, Grade 20 Cb


File: B31-89-020

Question (I): Are the correct specified minimum tensile strength (SMTS) and basic allowable stresses listed in ASMVANSI B31.3, Table A- i for ASTM B 464 Grade 20 Cb (UNS N08020)?

Reply (I): No. The SMTS should be 80 ksi. The basic allowable stresses are being revised for inclusion in a future addenda to ASMVANSI 831.3.

Question (2): For ASTM 8464 Grade 20 Cb may the allowable stresses in ASME Boiler and Pressure Vessel Code, Section VIII, Division I, Table UNF-23.3 be used for design of ASMUANSI

. B31.3 piping.

Reply (2): Yes, but the allowable stresses must be adjusted by the appropriate weld joint factor.


Subject: ASMUANSI B31.3-I 987 Edition With Addenda Through B31.3b-1988; Postweld Heat Treatment - Seal Welding


File: 831-89-023

Question: What are the requirements of ASMVANSI 831.3 regarding preheating and postweld heat treatment of rings or similar welded parts in the manufacture of valves?

Reply: ASME/ANSI 831.3 does not address this subject.


' Subject: ASMVANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Paras. 31 8 and 328.5.4; Fillet Welds

Date issued: November 16, 1989

File: 831-89-028

Question: Does ASMVANSI B31.3 permit the use of fillet welds as the primary pressure con-

Reply: Yes, provided the requirements of ASMUANSI B31.3, paras. 328.5.4 and 318 are met.

taining welds for special (proprietary) joints?

87



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,ASME B3L.3 90 W 0757670 0085067 2 W ,

8-1 4 831.3 Interpretations No. 8


Subject: ASME/ANSI 831.3-1 987 Edition With Addenda Through B31.3b-1988, Paras. A304, A328.2.1 , A328.2.5, and A328.5; Bonding Qualification Test, Joint Limitations

Date Issued: November 16,1989

File: B31-89-034

Question (I ): Applying the rules of ASMWANSI B31.3, para. A328.2.5(a), the required bonding qualification test assembly should consist of at least one pipe-to-pipe joint and one pipe-to-fitting joint. Is a pipe-to-pipe joint required for solvent cemented joints in thermoplastic piping?

Reply (I): Yes.

Question (2): In ASMUANSI B31.3, para. A328.2.5(a), is a pipe-to-fitting joint required for hot gas welded joints in thermoplastic piping?

Reply (2): Yes.

Question (3): Applying the rules of ASMUANSI B31.3, para. A304, the required test pressure for the bonding qualification test assembly specified in para. 328.2.5(b) may exceed the minimum burst pressure of the plastic components. Is this the intent of ASMWANSI B31.31

Reply (3): ASME/ANSI B31.3 does not address the issue of minlmum burst strength.

Question (4); Is it in violation of ASMUANSI 631.3 to conduct hot gas bonded welds with joints in.?

Reply (4): No, ASMUANSI 831.3, para. A328.5.2(a) states recommendations for joint dimen-

that have a root face and root gap other than

sions. See the requirements of para. A328,2.1 (b).

-Question (5) : In ASMUANSI B31.3, paras. A328.5.3 and A328.5.4, does the word "fillet"-apply to heat fusion joints?

Reply (5): Yes.

Question (6): ASMUANSI B31.3, para. A328.5.3(b) states that assembly'of the surfaces to be joined shall produce a small fillet of cement at the outer limits of the joint. if, after the joint cures and the cement dries, there are areas at the outer limits that do not exhibit a small fillet, is the joint rejectable?

Reply (6): Yes.

aa



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!ASME B 3 L - 3 90 0759b70 008.5068 4

831.3 Interpretations No, 8 8-1 5, 8-1 6


Subject: ASMUANSI B31.3-i 987 Edition With Addenda B31.3b-1988, Paras. 345.1 and 345.9; Leak Testing


File: B31-89-035

Question (I): Where leak testing a system follows guidelines under ASMUANSI 831.3, para. 345.1 (c), does ASMUANSI 831.3 require that all items under para. 345.9 be performed (345.9.1, 345.9.2, and 345.9.3)?

Reply (1): Yes.

Question (2): Where tying a newly constructed SMVANSI 831.3 normal fluid service piping system into an existing piping system, and the tie-in weld cannot be isolated for hydrostatic or pneumatic testing, and the conditions of para, 345.1 (c) do not apply, what does ASMUANSI B31.3 require for leak testing?

Reply (2): ASMUANSI B31.3 does not address leak testing under these cir¿umstances.


Subject: ASMUANSI B31.3-1987 Edition With Addenda Through B31.3b-i 988, Para. 302.3.5; Stresses due to Cold Spring


File:. B31-89-036

Qùestion: In accordance with ASMUANSI B31.3, para. 302.3.5(c), is it required to include the stresses due to cold spring in the sustained longitudinal stress S,?

Reply: No.

89



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8-1 7, 8-1 8


B31.3 Interpretations No, 8

Subject:


ASMUANSI 831.3-1987 Edition With Addenda Through B31.3b-1988, Paras. 300 and 300.1 and Fig. 300.1 .I, Applicability - Offshore Platform

File: 831 -89-01 7.

Question: At what point does the coverage of ASMWANSI B31.3 end in piping connected to a launcher/receiver for a pipeline pig and a pipeline/riser on án offshore platform?

Reply: Except as stated in para. 300.1 .i (c) and shown in Fig. 300.1 ,i, ASMVANSI B31.3 does not specify limits of coverage; it is the owner's responsibility to specify the appropriate B31 Code break points. See para. 300(b)(i 1.


Subject: ASMUANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Para. 304.5.1 and Table A-1 ; Materials/Fittings - Use of Two Grades

Date Issued; April 20, 1990

File: B31-89-033

Question (I 1: When using stainless steel materials that meet ASTM requirements for two grades (e.g. 304/304L or 316/316L) in B31.3 piping, may the design be based on the allowable stresses tabulated in ASMEIANSI B31.3, Table A-i for the straight grade through 1000°F and for the L grade above 1 OOO'F?

Reply (I): Yes.

Question (2): May stainless steel flanges and flanged fittings, that meet ASTM requirements for two grades (eng. 304/304L or 31 6/31 6L) be qualified by ASMUANSI 831.3, para. 304.5.1 for design temperatures above' 800°F and 850"F, respectively?

Reply (2): Yes; L grade stresses must be used above 1000°F.

~- ~ ~ -~ ~~ ~-

90



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ASME ËÏ31e3 90 W 0759670 0085070 2 W '



Subject: ASMVANSI B31.3-i987 Edition, Paras. 323.1 .I and 323.1.2; Material Reidentifica- tion


File: 831 -89-043

Question (I): Does ASMVANSI B31.3 require that materis,; conforming to para. 323.1.1 or 323.1.2 be reidentified after cutting for fabrication?

Reply (I): No.

Question (2): Does ASME/ANSI B31.3 have qualification requirements for an individual who reidentifies material?

Reply (2): No.


Subject: ASMVANSI 831.3-1987 Edition, Para. 332.2.1; Bends - Requirements for

Date issued: May 7, i990

File: B31-89-044

Question: In accordance with ASMUANSI B31.3, para. 332.2.1, is it permissible to reduce the outside diameter of the bend by grinding if the wall thickness required by the design is maintained?

Reply: ASME/ANSI 831.3 does not address- this subject.


Subject: ASMUANSI 831.3-1987 Edition With Addenda Through B31.3b-1988, Para. 330; Preheat Requirements - Welding Procedure Specification


File: B31-89-045

Question: In.accordance with ASMVANSI B31.3, para. 330, for temperature verification, extent of preheat zone, and limitations on interruption of welding, is it required that the welding procedure specification detail these requirements?

Reply: No.

91



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Ì ASME 831-3 90 0757670 0085071 4

~ -~ ~~- -



Subject: ASMUANSI B31.3-1987 Edition With Addenda Through, B31.3b-I 988, Para. 331 .I .7; Hardness Tests - Procedure Qualification Records


File: B31-89-046

Question: In accordance with ASME/ANSI B31.3, para. 331 .I -7, is it reqL.:ed that hardness tests

Reply: No.

be verified on procedure qualification records?


Subject: ASMUANSI B31.3-I987 Edition With Addenda Through B31.3b-I 988, Para. 330.1; Preheat Temperature - Procedure Qualification


File: B31-89-047

Question: In meeting the requirements of ASMUANSI 831.3, para. 330.1.1 for preheat temperatures, is it necessary to comply with the values in Table 330.1 .I, or can the requirements of the BPV Code, Section IX be used?

Reply: ASMUANSI B31.3, Table 330.1.1 applies, except for those values which are listed as recommendations.


Subject: ' ASME/ANSI B31.3-1987 Edition With Addenda Through 831.3~-I 989, Table 331 .I .I; Heat Treatment Requirements


File: 831 -89-050

Question: In meeting the requirements of ASMUANSI B31.3, Table 331 .i .i for heat treatment .of materials in P-Nos. SP-i through SP-5, what heat treatment is necessary if the engineering design does not specify the requirements?

Reply: ASMUANSI B31.3 does not designate a specific heat treatment procedure for these materials, For conformance with ASME/ANSI B31.3, the engineering design must establish procedures in accordance with Note (1) of Table 331 .i . I .

92



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831.3 Interpretations No. 8 a - 2 ~ ~ a - 2 6 ~ a - 2 7


Subject: ASMVANSI 931.3-1 987 Edition With Addenda Through 931.3~-1989, Para. 302.3.2 and Table A-I; Stress Value for A 387, Grade 9, Classes I and 2

Date Issued: May 7, i990

File: 931 -89-051

Question: Basic allowable stresses for listed materials ASTM A 387, Grade 9, Class i and Class 2 are not listed in ASMVANSI 931.3. May the rules of para. 302.3.2(d) be used for calculating the allowable stresses at 100°F for ASTM A 387, Grade 9, Classes 1 and 2 materials?

Reply: Yes.


Subject: ASMVANSI 931.3-1 987 Edition With Addenda Through 931.3b-i 988, Paras. 341.4.1 and 344.2; Visual Examination - Small Bore Piping


File: 931 -90-001

Question: Should small bore piping systems be excluded from ASMVANSI 931.3 because it is

Reply: No. The engineering design may specify any measures necessary to supplement visual

impractical to conduct "direct" visual examination of internal imperfections?

examination within the requirements of ASMVANSI B31.3, para. 344.2.


Date Issued:

File:

Question (

Subject: ASMVANSI 931.3-1 987 Edition With Addenda Through 931.3~-1989, Fig. 328.5.29; Double-Welded Slip-On Flange - Dimension

May 7, 1990

931 -90-007

): Is it the intent of ASMVANSI 931.3, Fig. 328.5.29 sketch (I), to have the inside fillet weld some distance below the face of the slip-on flange?

Reply (I): Yes.

Question (2): What is the acceptable range of that dimension?

Reply (2): ASMVANSI B31.3 does not specify a range for that dimension.

93



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a-2t~~8-29



Subject: ASMVANSI B31.3-1987 Edition With Addenda Through 831.3~-I 989, Fig. 328.4.4; Branch Pipe Projection Into Run Pipe


File: 831 -90-008

Question: In accordance with ASMUANSI B31.3, Fig. 328.4.4 sketch (c), is there a maximum distance that the branch pipe can project into the run pipe?

Reply: No.


Subject: ASMVANSI B31.3-1987 Edition With Addenda Through B31.3~-i 989, Table 323.3..1 and Para. 328.2.1 ; Impact Requirements in Qualifying a Welding Procedure


File: B31-90-009

Question: In accordance with ASMUANSI B31.3, para. 328.2.1(d), when impact testing is required by ASMUANSI 831.3 or the engineering design in qualifying a welding procedure, does this requirement apply to both fabricators and manufacturers?

Reply: Yes.

94



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I A S M E B31i.3 90 m 0759670 0085074 T m

B31.3 Interpretations No. 8 8-30, 8-31


Subject: ASME/ANSI B31.3-i 987 Edition With Addenda Through B3l.3~-1989, Paras. 300(c)(2) and 323.3.4; Impact Testing Methods and Acceptance Criteria Below - 320°F


File: B31-90-01 O

Question (1): Does ASMVANSI B31.3 permit the use of other toughness testing methods .in place of Charpy impact testing for systems with a minimum design temperature below - 320"F?

Reply (i): No.

Question (2): Does ASMUANSI 831.3 prohibit the use of other testing methods and/or analysis to supplement Charpy testing to evaluate materials for use below - 320'F

Reply (2): No. See para. 300(c)2.

Question (3): Can the Charpy testing requirements of ASMUANSI 831.3 be satisfied by testing at - 320'F, even though the minimum design temperature is - 423'F?

Reply (3): No; see para. 323.3.4.


Subject: ASMUANSI B31.3-I 987 Edition With Addenda Through 831.3~-1989, Paras. 345 and 345.2.2; Leak Test as Nondestructive Examination

Date Issued: May 7, i990

File: B31-90-01 I

Question (I): In accordance with ASMUANSI B31.3, para. 345, are all forms of leak testing described considered to be nondestructive examination?

Reply (i): No. ASMUANSI B31.3 does not classify leak testing as examination.

Question (2): Does ASMUANSI B31.3 have requirements for the personnel that perform leak testing?

Reply (2): No; however, the examination for leaks required in ASMUANSI 831.3, para. 345.2.2 should be by personnel qualified for visual examination.

95



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8-32,a-53, a-34 . B31.3 Interpretations No. 8


Subject: ASMUANSI B31.3-1987 Edition With Addenda Through B31.3~-I 989, Para. 341.3.2 and Table 341.3.2A; Acceptance Criteria - Liquid Penetrant and Mqgnetic Particle

Date Issued: May 7, i 990

File: B31-90-012.

Question: In accordance with ASMUANSI B31.3, para. 341.3.2, for the determination of an imperfection using liquid penetrant or magnetic particle examination techniques, is it the size of the indication or the size of the discontinuity that is used in the determination of acceptance or rejection?

Reply: ASMUANSI B31.3 specifies liquid penetrant and magnetic particle examination for the detection of cracks only, and all cracks are rejectable.


Subject: ASME/ANSI 831.3-1 987 Edition With Addenda Through 831.3~-1989, Para. A314 and Table 314.2.1; Plastic Lined Pipe - Use of Screwed Flanges


File: 831-90-01 3

Question: Does ASME/ANSI 831.3 prohibit the use of threaded flanges on plastic lined metallic pipe?

Reply: No; threaded joints within the size ranges and 1imitati.ons in accordance with ASMUANSI B31.3, Table 314.2.1 may be used. Safeguarding may be required; see Note (4) of Table 314.2.1.


Subject: ASMEYANSI B31.3-i 987 Edition With Addenda Through B31.3~-I 989, Tables 326.1 and A-I ; Dual Certified Materials and Components


File: B31-90-014

Question (I): For temperatures not exceeding 100O0F, may ASMUANSI 831.3 piping systems be constructed of dual certified stainless steels (e.g. 304/304L) using Table A-I stresses for the straight grades?

Reply (I): Yes.

Question (2): May the pressure-temperature rating for the straight grade of the corresponding materials for components listed in ASMUANSI B31.3, Table 326.1 be used?

Reply (2): The requirements of the referenced standards apply.

96



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B31,3 Interpretations No. 8


8-35, 8-36

Subject: ASMUANSI 831.3-1987 Edition With Addenda Through B31.3~-I 989, Paras. M307.2 and MA323.4.2; Category M Fluid Service - Double Contained Piping; Use of Valves

Date Issued: May 7, .i 990

File: 831 -90-01 5

Question (1): Does ASMUANSI 831.3 require the use of double contained piping systems for Category M Fluid Service?

Reply (1): No.

Question (2): Does ASMUANSI 831.3, para. MA323.4.2 permit the use of a double contained thermoplastic piping system for Category M Fluid Service?

Reply (2): No.

Question (3): Does ASMUANSI 831.3, para. M307.2 require the use of fire safe (fire tested) valves for Category M Fluid Service?

Reply (3): No.


Subject: ASMUANSI B31.3-1987 Edition With Addenda Through B31.3~-1989, Table A-i ; Use of Plate Material for Pipe


File: B31-90-016

Question: Is pipe fabricated in accordance with ASMUANSI 831.3, from a listed plate material (e.g., A 51 6 Gr, 60) without reference to a pipe specification (such as ASTM A 671 1, acceptable per ASMUANSI B31.31

Reply: Yes.

97



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ASME B3L.3 70 W O757670 0085077 5 i



Subject:


ASMVANSI B31.3-i 987 Edition With Addenda Through B31.3~-I 989, Para. '304.3.3 and Figs. 304.3.3 and K328.5.4; Area Replacement - Definitions

File: B31-90-017

Question: In accordance with ASMVANSI 831.3, para, 304.3.3, what is the correct value of Tb to be used in calculation i, for the branch connection shape shown in the lower half of Fig. K328.5.41 Is Tb based upon the reinforcing barrel of the fitting or the wall thickness of the matching branch pipe?

Reply: The value of 76 to be used in calculation L, for the referenced fitting is the nominal thickness of the reinforcing barrel less manufacturing mill tolerances, provided that the increased barrel thickness is uniform and extends at least to the 1, limit as shown in Fig. 304.3.3. Otherwise, Tb is the nominal thickness of the matching branch pipe, less manufacturing mill tolerance.


Subject: ASMUANSI 831.3-1 987 Edition, Paras. 341.4.2 and 341.5 and Table 341.3.2A; Cat- egory D Fluid Service


File: B31-89-049

Question (I): In accordance with ASMWANSI B31.3, Table 341 .3.2A, what acceptance criteria

Reply (I): ASME/ANSI-B31.3 does not address radiography for Category D Fluid Service welds.

Question (2): In accordance with ASMVANSI 831.3, may the owner specify radiography as a

should be used for Category D Fluid Service pipe welds which have been radiographed?

supplementary examination to be performed on Category D Fluid Service piping?

Reply (2): Yes; in accordance with ASMUANSI B31.3, para. 341.5.

Question (3): In accordance with ASMVANSI B31.3, para. 341.4.2 and Table 341 .3.2A, if radiography is performed on Category D Fluid Service pipe welds, and was not specified by the engineering design, should the radiography be disregarded?

Reply (3): ASME/ANSI B31.3 does not address this subject.

98



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ASME B3L-3 90 0759670 0085078 7

CODE REFERENCE INDEX (GENERAL NOTE: Code references are based on ASME 631.3-1990 Edition . References in brackets are to



No . - Introduction ............................... .1.3. 1.6. 1-7 300 ......................................... 7.10. 8-17 300(b) ....................... .1.26. 1.32. 4.08. 5.03. 8-09 300(~) ............ .3.2. 3.4. 4.10. 6-03R (Vol . 7). 7.05. 8-30 300(c) [300(e)] ............................. .1.3. 1.6. 1-7 300.1 ....................................... .7.10. 8-1 7 300.1.1 ............. .1.47. 1.52. 2.26. 3.1. 4.19. 6.01. 8-01 Fig . 300.1.1 ................... .1.8. 1-1 9. 2.26. 7-1 O. 8-1 7 300.1.3 [300.1.4] ................ .1.8. 1.16. 1.19. 1.26. 3-2 300.2

Category D fluid service ................ .4.13. 5.03. 6-01 Category M fluid service ........... . l-40, 1.73. 6.01. 8-09 notch-sensitive ................................... 2.22 owner .......................................... 2-30 piping components ........................... .3.2. 8-01 piping system .................................... 1.30 severe cyclic conditions ...................... '5-1 2. 8-09

301 .............................................. 5-11 301.2 ......................................... 2.3. 7-01 301.2.1 .... i ...................................... 2.29 301.3 .............................................. 2-3 301.3.2 ........................................... 4-11 301.5.3 ........................................... 4-07 301.7.2 ............................................ 3-4 302 .............................................. 1.32 302.2 ............................................. 1-50 302.2.4 [302.2.3] ..................... 1.3. 1.32. 2.14. 3.4.

4-1 1. 7.01. 7.04. 8-04 302.3.2 ...................... .1.18. 1.38. 2.16. 3.13. 8-25 302.3.4 ........................................... 2-20 Table 302.3.4 ...................... .1.42. 1.78. 2.20. 3-1 1 302.3.5 . . . . . . . . . . . . . . . . . . 1.20. 1.50. 2.14. 2.15. 2.24. 3.4.

4.10. 4.12. 6-03R (Vol . 7). 6.07. 7.04. 7.05. 8-16 302.3.6 ........................... .1.50. 2.15. 2.16. 2-17 302.4 ............................................. 1-20 303 .............................................. 6-05 304.1.1 ................................ .1.42. 1.54. 1-70 304.1.2 ...................... .1.42. 1.57. 1.68. 1.70. 2-11 304.2.3 ..................................... .1.22. 5-11 Fig . 304.2.3 ....................................... 1.22 304.3 ............................. A.21. 1.46. 5.01. 6-09 304.3.2 ......................................... ,.4-05 304.3.3 ........................... .4.03. 7.02. 8.06. 8-37 Fig . 304.3.3 ....................................... 8.37 304.3.4 ...................... .1.21. 1.37. 1.55, 1.75. 2-27 Fig . 304.3.4 ....................................... 1.70


Code Reference

Table 326.1 ... 328 . . . . . . . . . . 328.2 [327.5] . 328.2.1 [327.5. Figure 328.4.4 328.5 [327.4] . .


304.5 .............................................. 3-4 304.5.1 ........................................... 8-18 304.7.2 .................. .1.51, 3.2. 4.05. 5.05. 5.11. 6-09 304.7.4 ........................................... 1-16 305.2 .......................................... 3.8, 3-9 305.2.1 ........................................... 1-38 305.2.3 ..................................... .6.01, 7-03 308.2.1 ........................................... 5-12 308.2.4 ........................................... 5-12 311.2.4 ..................................... .6.02, 6-05 314.2.1 ........................................... 2-22 Table 314.2.1 ...................................... 8.33 315.2 .............................................. 3.6 315.3 .............................................. 3-6 317.2 .............................................. 1-17 318 .............................................. 8-13 319.2.1 ........................................... 2-17 319.2.3 ..................................... .7.04, 7-05 319.3.5 .......................................... -4-10 319.3.6 ........................ .1.6, 1.7, 1.55, 2.24, 5-15 319.4.1 ........................................... 1-33 319.4.4 ................................. .1.71, 2.7, 2-24 319.7 ....................................... .1.16, 7-05 321.1.1 ........................................... 6-07 321.1.4 ........................................... 1-49 322.6.3 ........................... b1.32, 2.21, 2.29, 7-01 323.1.1 ........................................... 8-19 323.1.2 . . . . . . . . . . . . . .1.11, 1.15, 1.48,'2.1, 6.06, 8.07, 8-19 323.2 .............................................. 3-9 323.2.1 ............................................ 1.13 Table 323.2.2

[Table323.2.1] . . . . . . . . . . . . . . . . . . . 1.12, 1.48, 1.65, 1.76, 2-1 9, 3.8, 4.01, 4-1 5

323.2.4 .......................................... -6-06 323.3 ....................... ..................1.76, 5-13 Table 323.3.1

[Table 323.2.21 ......... .l-12, 1.76, 4.17, 5.19, 5.21, 8-29 323.3.4 ........................................... 8-30 323.3.5 ............................................ 2.9 Table 323.3.5 ....................................... 5.14

................ .1.11, 1.51, 2.3, 8.07, 8-34

.................................... 7-02

.................................... 1-66 . 327.5.21 ................ .1.76, 4-1 7, 8-29

.................................... 8-28

.................................... 5-09

ia)



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No.

328.5.1 [327.4.1] ................................... 5-17 328.5.2 [327.4.2] ................................... 5-12 Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . .l-28, 5-12, 6.02, 6-05, 8-27 328.5.4 [327.4.4] . . . . . . . . . . . . . . . . . . . 1-59, 1-74, 2-10, 4-03,

4-1 4, 7-08, 8-1 3 Fig . 328.5.4 [Fig . 327.4.41 . . . . . . . .l-59, .74, 4-03, 4-16, 7-08 328.6 ............................................ 2-18 330 ............................................. 8-21 330.1 ............................................ 8-23 331 .............................................. 8-12 331.1.1 ........................................... 8-08 Table 331.1.1

[Table 331.3.11 .................... .1-69, 2-2, 5-06, 8-24 331.1.2 ........................................... 8-05 331.1.3 [331.3.6] . . . . . . . . . . . . . . . . . . . .l-39, 1-59, 4-06.5-06 331.1.4 [331.1.2]. .................................. 5-08 331.1.6 [331.3.4] ................................... 5-08 331.1.7 [331.3.2] ............................. .l-78, 8-22 331.2.2[331.1.1] .............................. 1-39/1-78 331.3.4 ........................................... 8-05 331.3.7 ........................................... 8-05 332.1 ............................................. 8-03 332.2 [329.1] ...................... .l-23, 1-53, 4-02, 8-20 332.4 [329.3, 330.21 ................................. 2-2 335.2 .............................................. 2-5 340.2 [336.1.2] .................................... 1-26 340.3 [336.3] ...................................... 1-10 340.4 [336.2] ...................................... 1-31 341.2 [336.1.1, 336.1.33 . . . . . . . . . . . . . .l-10. 1-26. 1-27. 2-28 341.3.1 [336.5] ............................... .l-64, 2-4 341.3.2 ........................................... 8-32 Fig . 341.3.2 [Fig . 327.4.11 ............................ 5-09 Table 341.3.2A

[Table 327.4.1Al . . . . . . . . . . 1-1, 1-9. 1-14, 1-41, 2-8, 5-04. 5-1 3, 5-1 6. 5-1.7. 5-1 8, 5-20. 6-04,

7-06. 8-32. 8-38 Table 341.3.26 [Table 327.4.1Bl . . . . . . . . . . . . . . . . .5-18. 6-04 341.3.4 [336.5, 336.5.41 . . . . . . . . . .l-62, 2-25. 2-32, 3-5. 3-14 341.4 [336.5] ...................... .1-24, 1-45, 3-12, 5-20 341.4.1 [336.5.1] . . . . . . . . . . . . . . 1-10. 1-26, 1-27, 1-60, 2-12,

2-28. 3-7, 3-12, 4-12, 5-10, 8-02, 8-10, 8-26

341.4.2 ........................................... 8-38 341.4.3 ........................................... 8-10 341.5 .............................................. 8-38 341.5.1 [336.6.1] .............................. .l-5, 3-12 342.1 [336.4.1] ................................... -2-28 343 [336.4.1] ...................................... 2-28 344[336.4] ....................................... 5-09 344.2 [336.4.2] .......................... 2-28/8-10, 8-26 344.5 [336.4.5] ......................... .l-10, 1-60, 2-12 344.6 [336.4.6] .................................... 1-60 344.7 [336.4.7] .............................. .2-28, 3-14


No . - 345 [337] ...................... .1.2. 1.72. 2.31. 3.3. 8-31

345.2.4 [337.4.3] .................................... 1.35

345.1 [337.1] . . . . . . . . . . . . . . . . . . .1.4. 1.30. 4.04. 6.08. 8-15 345.2.2 ........................................... 8-31

345.2.6 [337.1] ............................... .1.2. 5-22 345.3 [337.3] ............................ .2.6. 3.10. 5-02 345.4. ............................................ 8-04 345.4.2 [337.4.1] . . . . . . . . . . . . . . .1.35. 1.61. 1.63. 2.23. 4-04 345.4.3 1337.4.21 ................................... 1.63

345.7 [337.5.2] ................................... -1-36 345.8 [337.6] ................................ .1.25. 3-10 345.9 [337.5.1] .................... .4.09. 5.07. 6.08. 8-15 A304 ............................................. 8-14 A304.5.1 .......................................... 1-67 A314 ............................................. 8-33 A327.2.4 .......................................... 7-09

345.5 [337.4.4] ......................... .1.35. 1.43. 6-08

A328.2.1 .......................................... 8-14 A328.5 ........................................... 8-14 K315 ............................................. 7-07 K322.3 ........................................... 7-07 Fig . K328.5.4 ...................................... 8.37 M307.2 ........................................... 8-35 M322.3 ....................................... 2.13. 3-6 M323.1.3 .......................................... 3-7 M326 ............................................ 2-13 M335.4 [M335.5, M335.61 ............................ 3.6 M341.4 [M336.5] ............................ .1.24. 1-45 M341.4.1 [M336.5.1] .......................... .2.28. 3-7 M345.1 ........................................... 6-08 MA323.4.2 ........................................ 8-35 Appendix A Notes

(No equivalent) [(i411 .............................. 2.20 Note (1 7) ....................................... 4.18 Note (20) [(30)] .................................. 1.77 Note (57) [(2)] ................................... 1.58

Table A-1 [Table 11 . . . . . . . . . . 1.13. 1.18. 1.29. 1.38. 1.48. Appendix A

1.77, 2-1 , 3.8. 3.9. 3-1 3. 4-1 2. 4.13. 6.01. 6.06. 7.03. 8-1 1.

8.18. 8.25. 8.34. 8-36 Table A-1 B [Table 11 . . . . . . . . . . . . . . .1.78. 2.20. 4.18. 7-03

Appendix D .................... 1.6. 1.7. 1.34. 1.46. 1.55. 1.56. 1.71. 2.7. 2.24. 4.16.

5.01. 5.15. 6-06 Appendix E [Appendix KI ...................... .1.44. 5-1 O Appendix F [F323.2] ................................ 1.29 Appendix G ....................................... 5.12 Appendix H ...................................... -8-06 Appendix J ........................ .1.28, 1.54. 1.75. 5-04 Appendix M .................................. .6.01. 8-09 Case 137 ........................................... 3-1 Case 141 .......................................... 1-51




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/ A S M E B3L.3 90 O759670 0085080 5 - I

Sut. x t

SUBJECT

Interpretation - No .

Acceptance Criteria pressure tests ...................................... -1-2 weld ...................... 1.1. 1.9. 1.14. 1.41. 2.8. 5.09.

5.13. 5-1 7. 5-1 8. 5.20. 6.04. 7.06. 8-32

Allowable Stresses ................................ -4-1 2 bases for .......................... .1.18. 3-1 3. 8-1 1. 8-25 for ASTM A 312 .................................... 1.29 for ASTM A 387 .................................... 8.25 for ASTM A 570 .................................... 1.38 for ASTM A 587 ................................... . l-1 3 for ASTM A 671 .................................... 1-48 for ASTM B 464 .................................... 8.11 for austenitic stainless steels ........................... 3.13 Alternative Tests for Category D fluid service .......................... 1.36 requirements ....................................... 8.15 sensitive leak test ................................... 1.25 O Au!horized Inspector ................ see Owner's Inspector

Bending .................................... .4.02. 8-03

Bends corrugated ......................................... 1.23 miter ................................... see-Miter Bends reduction of outside diameter ......................... 8.20

Bonding Qualification Test hot gas welded ..................................... 8.14 minimum burst pressure ........................ .7.09. 8-14 solvent cement ..................................... 8.14

Bonds heat fusion ........................................ 8.14 hot gas weldëd ..................................... 8.14 test assembly ...................................... 7.09


Branch Connections extruded outlets ......................... .1.37. 2.27. 6-09 integrally reinforced fitting ............................ 4.05 projection into run pipe .............................. 8.28 reinforcement ................................ .8.06. 8-37 weld requirements ............. .2.10. 4.03. 4.14. 7.02. 7-08

Cumulative Index - B31.3 Interpretations Vols . 1-8

INDEX


No . -

Brazed Joints for flammable service ............................... -1-1 7

Buckles ..................................... .1.23. 1-53

Category D Fluid Service alternative pressure test for .......................... . l-36 limitations ................................... .4.13. 5-03 radiographic examination ............................. 8.38

Category M Fluid Service clarification of term ................................. 1.73 double contained piping .............................. 8.35 leak test ........................................... 6.08 liquid oxygen ...................................... 8.09 requirements ....................................... 8.35 tubing size limitations ................................ 2.13 "very smaii quantity" ............................... . l-40

Code Coverage 831.3 versus 631.4 ........................... .1.47. 7-10 general hydrocarbon service .......................... 6.01 in-line sensing devices ............................... 8.01 new and replacement piping .......................... 5.22 offshore platform ................................... 8.17 oil heating system ................................... 4.19 synfuel plant piping ........................... .1.52, 2-26 tobacco plant piping .................................. 3.1

Componenfs (see also fittings, flanges, standard componenfs, and valves)

certification .............................. design conditions ......................... flexibility characteristic ............... .i-%. in-line sensing devices ..................... referenced standards ...................... Compressors internal piping .............................

1.26. 3.7. 5-10 . . . . . . . . . . 2.3 . 56, 2.24. 5-01 ......... 8.01 . . . . l-44, 5-10

.......... 1.8 Corrugated Bends ................................. . l-23

Cyclic Loading ................................... -5-1 2


conditions ......................................... -2-3 Lame theory ....................................... 1.57

Design)

(C)



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Subiect Interpretation - N O . Subject


Displacement Stress .......................... .2.14. 2-24 Flexibility Factors basis for .......................................... 1-56 I for 816.9tees ....................................... 1-7 for fabricated intersections . . . . . . . . . . . . . . . . . . .l-6. 4-1 6. 5-15


for welded elbows ................................... 1.6 Examination extent of .................................... .1.24. 5-18 in process ......................................... 3.14 progressive .................... .see Progressive Examination radiographic . . . . . . . . . . . . . . . . . . see Radiographic Examination random ........................... 1.27. 1.45. 1.62. 2.12.

2.32. 4-12 required ................................ . l-24, 1.60. 6i04 Spot .............................................. 1-62 visual ....................................... .2.28. 8-10

Exclusions for compressors and internal piping .................... . l-8 for interconnecting piping ............................ 1.19

Expansion Joints ................................... 1.16

Extruded Outlet pressure design of ............................. .l.îl. 1-70 tees considered as .................................. 1.55


Fillet Weld internal. slip-on flange ............................... 8.27 pressure containing .................................. 8.13 size .............................................. 1-74

Fittings



616.9 ....................................... .1.7, 5-01

MSS SP-75 ....................................... -1-11

Flammable Service ................................ . l-1 7

Flanges assembly ........................................... 2-5 design ....................................... .1-67. 3-4 long welding neck .................................. 4-05 slip-on ...................................... .5-12. 8-27 use of aluminum . . . . . . . . ; ........................... 1-51

Flexibility Analysis exemptions from .................................... 1.33

.. ~~



in Appendix D ............................. .1.55. 2-24

Fluid Service general hydrocarbon ................................ 6.01 responsibility for

categorizing ................................ .4.08. 8-09


onset ........................................... 1-58

Hardness limitations on ...................................... -2-2 records ........................................... 8-22

Heat Treatment cooling rate ........................................ 1-69 for austenitic stainiess steel .......................... . l-65 for bending and forming .............................. 2.2 for valve parts ..................................... -8-12 governing thickness . . . . . . . . . . . . . . . . . . 1.39, 1.59, 4.06, 5-06 heating rate ........................................ 1.69 local ....................................... .5.08, 8-05 monitoring ................................... .5.08, 8-05 requirements ....................... .8.08, 8-2 1. 8.23. 8-24 SP-1 through SP-5 ................................. -8-24 when radiography is

required .................................... .1.64, 2-4


Impact Tests absorbed energy data ................................ -2.9 alternative methods ................................. 8-30 base metal ......................................... 4-01 exclusions from ......................... . l-76, 5-1 4, 8-30 heat treatment required .............................. 5.19 in qualifying procedures .............................. 8.29 of aluminum filler metals ............................. 2.19 of austenitic stainless steel ............................ 1.65 of bolting materials .................................. 4.15 of the heat affected zone ....................... .1.76, 5-21 of weldments ...................... .1.12, 1.65, 1.76, 5-21 temperature limitation ......................... .5.14. 8-30

Imperfections (see also Acceptance Criteria) concave root surface ........................... .1.1. 6-04 determination of .................................... 8.32 lack of fusion ...................................... 5.09 porosity ............................ .1.9, 5.13, 5.16, 5-20 slag inclusion ...................................... 5.20 tungsten inclusions ............................. .1.9, 5-17 undercutting ............................. .1.14, 2.8, 6-04

Installed Piping ................................... . l-30

íd) Cumulative Index . 631.3 Interpretations Vols . 1-8



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/ A S I E 831.3 90 m 0757670 0085082 9 m

.

Interpretation No . - Subiect

instrument Piping . . . . . I ...................... .7.07, 8-01

Internal Piping. Equipment .......................... . l-8

joint Factors for ASTM A 234.


welds ................................ .1.78, 3-1 1, 8-06

ASTM A 312. ASTM A 403 ......................... 2.20

joints circumferential bands ................................ 5.1 í exposed during test ............................ .2.6. 3-10 instrument tubing ................................... 7.07 special ............................................ 8.13

Lateral Fittings ...................................... 1.6

leak Tests acceptance criteria .................................. . l-2 alternative ......................... .4.09, 5.07, 6.08. 8-15 as nondestructive examination ......................... 8.31 for Category D fluid service .......................... 1.36 for system designed for

isolation of test pump ................................. 1.2 leakage ........................................... -1-4 minimum hydrostatic test

pressure ................................... .2.23. 4-04 minor repairs and additions ............................ 1.2 of discharge piping .................................. 1.72 of newly constructed

systems .......................... . l-4, 5.02, 5.22, 8-1 5 of piping and vessel ................................ . í-63 of piping connecting

equipment ........................................ 3.3 of replacement piping ............................... 5.22 painting before test ........................ .2.6, 3.10, 5-23 personnel qualification ............................... 8.31 preparation for ...................... .2.6, 3.10. 5-02., 5-23 reduced pressure

(hydrostatic test) ............................ .1.61, 2-23 sensitive ......................................... . l-25 temperature correction for ...................... . l-35, 1-43

O psi ............................................ 2.31

Lethal Substance ................................... 1.73

Limitations on imperfections ......................... see imperfections on hardness ........................................ 2.2 on tubing size ................................. .2.13, 3-6

low Temperature Requirements ......................... see Impact Tests


No . - Materials API 5L .............................. 1.78. 2.4. 3.9. 3-1 1.

6.01. 6-06 API 5LX., .......................................... 2.4 ASTM A 234 ...................................... 2.20 ASTM A 312 ........................... .1.29. 1.77. 2-20 ASTM A 403 ................................ .1.77. 2-20 ASTMA487 ...................................... 8-07 ASTM A 5 3 7 ....................................... 2-1 ASTM A 570 ...................................... 1.38 ASTM A 587 ...................................... 1-13 ASTM A 633 ...................................... 1.11 ASTM A 658 ....................................... 3-8 ASTM A 671 ..................................... -1-48 ASTM B241 ....................................... 2-19 ASTM B 337 ....................................... 4-18 certification .................................. .5.10. 8-02 conforming to two grades ...................... .8.18. 8-34 notch sensitive ..................................... 2.22 reidentification ..................................... 8.19 toughness requirements .............................. 5.19

Miter Bends pressure design of ............................. .1.22. 5-11



Nomenclature d ................................................ 1.54

t" ................................................ 1-75 T ................................................ 1-28

- T , .5-04, 5-16 ..........................................

Nonmetallic Piping in Category M Fluid Service .......................... 8.35 joint requirements ............................. .7.09. 8-14


Occasional Variations (pressure/temperature allowances) ....... . l-3, 2-1 4. 4-1 1

loads ............................. .1.50. 2.15. 2.16. 2-17


Owner's Inspector qualifications of .................................... 1.31 responsibilities of ................................... 1.26

Pipe elbowless ......................................... 8.03 in corroded condition ............................... 2.15 made from plate .............................. .1.48. 8-36 of noncircuiar cross section ............................ 3.2 spiral welded ...................................... 7.03




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Subject Interpretation - No .


Plastic lined pipe . use of screwed flanges ................... 8.33 pipe supports ...................................... 1.49


Positions qualification of welding ............................. . l-66



Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ............................ 1.68 of extruded headers ............................ 1.2 1. 1-70 of miter bends ..................................... 1.21 of pipe ............................ 1.42, 1.54, 1.57, 1.68,

of valves .......................................... 8.04

Pressure Rating valve ............................................. 8-04 variations .......................................... 4.11

1.70, 2-1 1





Progressive Examination . . . . . . . . . . . . . . i.. . . .1.5. 1.62. 3-5

Published Specification ............................ . l-1 5


as supplementary examination ......................... 8.38 random radiography . . . . . . . . . . . . . . . . . 1.27. 1.45. 1.62. 2-1 2.

records ........................................... 1.1 O requirements ....................................... 6.04 selection of welds for

examination ...................................... 2-25 aspot radiography .............................. .1.62. 3-12 when PWHT is required ......................... 1.64. 2-4

Records certification .................................. .5.10. 8-02 of hardness tests .................................... 8.22 for radiographic examination .......................... 1-10 retention of ........................................ 1.1 O

100°/~ ............................................ 5-09

2.32. 3-12


Reinforcement. Branch attachment weld . . ........................... .4.03. 7-08 clarification of terms ................................. 1-37 limits of ........................................... 2-27

Repairs to welds .......................................... 2.18

Safeguarding ...................................... 5.12


Seismic loads ..................................... 4.07 stresses due to ..................................... 2.17

Severe Cyclic Conditions cyclic loading ...................................... 5-12 large rapid temperature change ........................ 8.09 spiral welded pipe .................................. 7-03


Standard Components manufacturers markings ......................... .3.7. 8-02 valves ................................. .5.05. 8.04. 8-07

Standards corndiance ....................................... -5-10 superseded ........................................ 1-44

Stresses (see also Allowable Stresses)

displacement stress range ............................. 7.04 due to cold spring ................................... 8.16 due to occasional loads ............................. -2-1 6 due to pressure surges ............................... 1.50 due to seismic loads ................................. 2.17 due to thermal gradients .............................. 3.4 longitudinal . . . . . . . . . . . . . . . . . . 1.20, 1.50, 2-1 5, 2.24, 4-1 O,

4-1 2, 6-03R (Vol . 7)) 6.07, 7.05, 8-1 6

Stress Intensification Factors application of . . . . . . . . . . . . . . . . . . . .1.34. 2.24. 6-03R (Vol . 7) basis for ......................................... -1-56 branch connections .................................. 2.7 for 616.9 tees ...................................... -1-7 for fabricated intersections ....................... .1.6. 5-15 for tees ........................... .1.46. 1.55. 1.71. 5-01 for welded elbows ................................... 1.6

Temperature large changes ...................................... -8-09 limitations ................................... .4.13. 5-14 reduction .......................................... 4-11

Tubing joints ............................................. 7-07 limitations ..................................... 2-1 3. 3-6

e Thickness Allowances in stress calculations ................................. 1.20

(f) Cumulative Index . 631.3 Interpretations Vols . 1-8



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No. -

components ................. t-6, 1-51, 3-6, 4-05, 5-05, 8-7 materials ................................... see Materials

Valves Category M Fluid Service. ........................... .8-35 materials ......................................... .&O7 pressure build up .................................. .&O4 ratings ........................................... .5-O5

Visual Examination internal ..................................... .8-10, 8-26 requirements ...................................... .2-28

Washers, Use of ................................... .2-5

Cumulative Index - B31.3 Interpretations Vols. 1-8

Subject Interpretation - No.

Weld fillet size ......................................... . l-74 for branch connections .............. .2-10, 4-03, 4-14, 8-37 imperfections ...................... see Acceptance Criteria longitudinal ............................. .2-20, 3-1 1, 4-1 8 qualification of position ............................. . l-66

socket ...................................... .6-02, 6-05 spacing of ........................................ .7-02

reinforcement ..................................... .7-O8 repair ............................................. 2-18

Welding Procedure qualification of ...... .1-12, 1-65, 1-66, 1-76, 4-1 7, 8-23, 8-29 specification ................................. .8-21, 8-22



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ASME/ANSI B31.3 1 nterpretations No. 7

Replies to Technical Inquiries May 1 , 1988, Through April 30, 1989

General Information

It has been agreed to publish interpretations issued by the 631 Committee concerning B31.3 as part of the subscription service. The interpretations have been assigned numbers in chronological order. An interpretation applies to the Edition or Addenda stated in the interpretation or, if none is stated, to the Edition or Addenda in effect on the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. The interpretations are not part of the Code or its Addenda.

These replies are taken verbatim from the original letters, except for a few typographical and editorial corrections made for the purpose of improved clarity. In some instances, a review of the interpretation revealed a need for corrections of a technical nature. In these cases, a revised reply, bearing the original intrepretation number with the suffix R, is presented.

ASM E procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not "approve," "certify," "rate," or "endorse" any item, construction, proprietary device, or activity.

For detailed instructions on preparation of technical inquiries to the 831 Committee, refer to Appendix Z.


Code Reference and Subject indexes have been prepared to assist the user in locating interpretations by location or by subject matter in the Code. They cover interpretations issued from Volume 1 up to and including the present volume, and will be updated with each volume.

2333

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B31.3

I


Paras . 300. 300.1, and Fig . 300.1.1; Applicability . . . . . . . . . . . .

Paras . 3OO(c)(3). 302.3.5, 319.2.3, and 319.7; Piping Supports Paras . 301.2, 302.2.4, and 322.6.3; Pressure Relief Device Set Pressure .............

. . . . . . . . . . . . 7-10 Paras . 300(c)(3) and (5). and 302.3.5; Longitudinal Stresses and Longitudinal

Bending Stresses-Sustained Loads ......................................... 6-03R .................... 7-05

7-01 Paras . 302.2.4, 302.3.5, and 31 9.2.3; Allowable Stress-Calculating Displacement

Stress Range ............................................................ 7-04 Paras . 304.3.3 and 328; Spacing of Welds ..................................... 7-02

7-03 Para . 328.5.4(0 and Fig . 328.5.4D; Branch Reinforcement ........................ 7-08 Para . A327.2.4; Qualification Test for CPVC Piping ............................... 7-09 Paras . K315 and K322.3; Tubing Joints-Instrument Piping ....................... 7-07

7-06

Para . 305.2.3, and Tables A-1 and A-1 8; Spiral Welded Pipe ......................

Table 327.4.1A; Weld Acceptance Criteria-Concavity and Convexity ..............

File No .

83 1-88-022

83 1-87-022' 831-88-001 831-87-021

831-87-041 83 1-87-039 83 1-87-040 83 1-88-009 8 3 1 1-88-02 83 1-88-008 831 -88-002

2 334

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631.3 Interpretations No. 7 6-03R, 7-01

Interpretation: 6-03R

Subject: ANSI/ASME B31.3-1984 Edition, Paras. 300(c)(3) and (51, and 302.3.5; Longitudinal Stresses and Longitudinal Bending Stresses-Sustained Loads


Item: 83 1 -87-022*

Question (1): In accordance with ANSI/ASME B31.3, para. 302.3.5(c), when calculating the longitudinal stresses due to pressure, weight and other sustained loads, should the thickness of pipe used in calculating SL be the nominal thickness minus mechanical, corrosion, and erosion allowances but not minus the manufacturer's mill tolerance?

Reply (1): Yes.

Question (2): in accordance with ANSJ/ASME 831.3, para. 302.3.5k) when calculating the longitudinal bending stresses due to sustained loads, what stress intensification factors should be applied?

Reply (2): ANSI/ASME 831.3 does not address the application of stress intensification factors for longitudinal stress due to sustained loads; but see ANSI/ASME 831.3, paras. 300(c)(3) and (5).


Subject: ANSI/ASME B31.3-1984 Edition with Addenda through B31.3~-1986, Paras. 301.2, 302.2.4, and 322.6.3; Pressure Relief Device Set Pressure


File: 831-87-021

Question: In accordance with ANSIIASME 831.3, paras. 301.2 and 322.6.3, may the set pressure of a single pressure relieving device for a piping system be chosen higher than the design pressure of the piping system provided para. 302.2.4 is satisfied for the maximum relieving pressure?

2335

Reply: No.

F- 13

73



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l . 1



Subject: ASMEIANSI 831.3-1987 Edition, Paras. 304.3.3 and 328; Spacing of Welds


File: 83 1-87-039

Question: In accordance with ASME/ANSI 831.3, are there requirements or guidelines on the minimum distance between welds in a pipe?

Reply: No, except as provided in para. 304.3.3(e).


Subject: ASME/ANSI 831.3-1987 Edition, Para. 305.2.3, and Tables A-1 and A-1 6; Spiral Welded Pipe


File: 83 1-87-040

Question (1): In accordance with ASME/ANSI 631.3, Table A-1, does ASTM A 671 and A 672 as listed, apply for both straight welded pipes and spiral welded pipes?

Reply (i): No. ASTM A 671 and A 672 do not include spiral welded pipe. ASTM specifications covering spiral welded pipe include "spiral welding" in their scope. These include ASTM A 134, A 139 and A 21 1. API-5L also includes spiral welding. See ASME/ANSI 631.3, Table A-1 6.

Question (2): In accordance with ASME/ANSI 631.3, para. 305.2.3, can carbon steel spiral welded pipe be used for severe cyclic service?

74

2 336

Reply (2): No.

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631.3 Interpretations No. 7 7-04


Subject: ASME/ANSi B31.3-1987 Edition, Paras. 302.2.4, 302.3.5, and 319.2.3; Allowable Stress-Calculating Displacement Stress Range


File: B31-87-041

Question (1 1: In accordance with ASME/ANSi 831.3, para. 302.3.5, should the basic allowable stress at maximum metal temperature .Sh used for calculating the allowable displacement stress range, be for the normal upper temperature under operating conditions, and exclude all short-time excursions above such normal operating temperature?

Reply (1 1: No. in accordance with para. 31 9.2.3, the allowable displacement stress range is based on the maximum and minimum temperatures for the displacement cycle under analysis.

Question ( 2 ) : Are the provisions of ASME/ANSI 831.3, para. 302.2.4 applicable for establishing the allowable displacement stress range for flexibility analysis?

Reply ( 2 ) : No.

2 337

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I'



Subject: ANSi/ASME 831.3-1 984 Edition with Addenda through 831.3~-1986, Paras. 300(c)(3), 302.3.5, 319.2.3 and 31 9.7; Piping Supports


File: 831-88-001

Question (1 1: When a pipe moves away from a support, should the longitudinal stresses for the pipe in the installed position, or the longitudinal stresses for the pipe in the operating position, or both, be compared to ANSi/ASME 631.3 allowable in accordance with para. 302.3.5(c)?

Reply (1): Both. See also para. 300(c)(3).

Question (2): Does ANSI/ASME 831.3 require the evaluation of the secondary effects of pressure, such as pressure expansion and elongation or the Bourdon effect with bends?

Reply (2): No. See also para. 300(c)(3).

Question (3): Does ANSI/ASME 831.3 address the stresses caused by axial forces in the displacement stress calculations?

Reply (3): No. See also paras. 300(c)(3) and 319.7.

Question (4): What is the ANSI/ASME 831.3 definition of "displacement stress range"?

Reply (4): The displacement stress range is defined in para. 319.2.3 as "the algebraic difference between the extreme displacement condition and the original (as installed) condition (or any anticipated condition with a greater differential effect)."


Subject: ANSI/ASME 831.3-1 984 Edition with the 831.3a-1984 Addenda, Table 327.4.1A; Weid Acceptance Criteria-Concavity and Convexity


File: 83 1-88-002

Question: Is it the intent of ANSi/ASME 831.3 to interpret concavity and convexity by radiography on welds required by 831.3 or the engineering design to be radiographed when this interpretation can not be made by visual examination?

Reply: For concavity, yes. ANSI/ASME 831.3 does not address convexity except as "internal protrusion" or "external reinforcement," neither of which is evaluated by radiography.

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Subject: ASME/ANSI 831.3-1987 Edition, Paras. K315 and K322.3; Tubing joints-Instrument Piping


File: 831-88-008

Question: Does ASME/ANSI 831.3, para. K315 apply to process control (instrument piping) tube fittings and tube joints?

Reply: Yes.


Subject: ASME/ANSI 831.3-1 987 Edition, Para. 328.5.4(0 and Fig. 328.5.40; Branch Reinforcement


File: B3 1 -88-009

Question: In accordance with ASME/ANSI 831.3, para. 328.5.4(0, is the attachment weld between the reinforcement member and the run pipe required for a full encirclement type reinforcement installation?

Reply: ASME/ANSI 83 1.3 does not specifically address full encirclement branch reinforcement. The Committee will be studying this item for possible future revisions.


Subject: ANSI/ASME 831.3-1984 Edition, Para. A327.2.4; Qualification Test for CPVC Piping


Item: 831 -88-021

Question: For CPVC plastic piping, is there a discrepancy between the hydrostatic test requirements in para. A327.2.4 for qualifying a bonding procedure specification (BPS) and the hydrostatic burst strength requirement for solvent cemented joints in ASTM F 493?

2 3 3 9

Reply: No. ANSI/ASME 831.3, para. A327.2.4 requires that a test assembly containing joints withstand a hydrostatic test pressure of four times the design pressure. ASTM F 493 qualifies the cement used in the joint.

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7-1 O 83 1.3 Interpretations No. 7


Subject : ASME/ANSI 631.3-1987 Edition, Paras. 300, 300.1, and Fig. 300.1 .l; Applicability

Date issued: December 8, 1988

Item: 83 1-88-022

Question: Which section of the ASME/ANSI 631 Code for Pressure Piping covers piping for a transmission line between an oil terminal and a tank farm part of the piping being accessible to the public?

Reply: ASME/ANSI 831.3 and 831.4; see Fig. 300.1.1 of 831.3.

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CODE REFERENCE INDEX (NOTE: Code references are based on ASMUANSI 831.3-1987 Edition . References in brackets are to



No . - Introduction ............................... .1.3. 1.6. 1-7 300 .............................................. 7-10 300(b) ............................ .1.26. 1.32. 4.08. 5-03 300(~) . . . . . . . . . . . . . . . . . .3.2. 3.4. 4.10. 6-03R (Vol . 7) . 7-05 300W [300(e)] .............................. 1.3. 1.6. 1-7 300.1 ............................................. 7-10 300.1.1 ................. ..1.47. 1.52. 2.26. 3.1. 4.19. 6-01 Fig . 300.1.1 ........................ .1.8. 1.19. 2.26. 7-10 300.1.3 [300.1.4]. ................ 1.8. 1.16. 1.19. 1.26. 3-2 300.2

Category D fluid service ................ .4.13. 5.03. 6-01 Category M fluid service . . . . . . . . . . . . . . . . . l-40, 1.73. 6-01 notch-sensitive ................................... 2 3 2 owner .......................................... 2-30 piping components ................................. 3.2 piping system .................................... . l-30 severe cyclic ..................................... 5.12

301 .............................................. 5-11 301.2 ......................................... 2.3. 7-01 301.2.1 . . . . . . . ................................ 2-29

............................. 2-3

............................ 4-11

............................ 4-07 301.7.2 . . . . . . . . . ............................. 3-4 302 .............................................. 1-32 302.2 ............................................. 1-50 302.2.4 (302.2.31 ....... 1.3. 1.32. 2.14. 3.4. 4.11. 7.01. 7-04 302.3.2 ............................ 1.18. 1.38. 2.16. 3-13 302.3.4 ........................................... 2-20 Table 302.3.4 ...................... .1.42. 1.78. 2.20. 3-1 1 302.3.5 ...................... 1.20. 1.50. 2.14. 2.15. 2.24.

3.4. 4-1 O. 4-1 2. 6-03R (Vol . 7) . 6.07. 7.04. 7-05 302.3.6 ........................... .1.50. 2.15. 2.16. 2-17 302.4 ............................................. 1-20 303 .............................................. 6-05 304.1.1 ................................. 1.42. 1.54. 1-70

....................... 1-22 304.3 .............................. 1.21. 1.46. 5.01. 6-09 304.3.2 . . . . . .

. . . . . . . . . . . . . . .4.03. 7-02

304.7.2 . . . . . . . . . . . . . . . . . . .1.51. 3.2. 4.05. 5.05. 5.11. 6-09


No . - 304.7.4 ........................................... 1-16 305.2 ............. .......................... 3-8, 3-9 305.2.1 ........................................... 1-38 305.2.3 ..................................... .6.01, 7-03 308.2.1 ........................................... 5-12 308.2.4 ........................................... 5-12 31 1.2.4 ..................................... .6.02, 6-05 314.2.1 ........................................... 2.22 315.2 .............................................. 3-6 315.3 .............................................. 3-6 317.2 ............................................. 1-17 319.2.1 ........................................... 2-17 3 1 9.2.3 ..................................... .7-04, 7-05 319.3.5 ........................................... 4-10 319.3.6 ........................ . l-6, 1-7, 1-55, 2-24, 5-15 319.4.1 ........................................... 1-33 319.4.4 ................................. .1-71, 2-7, 2-24 319.7 ........................................ 1-16, 7-05 321.1.1 ........................................... 6-07 321.1.4 .................................... 322.6.3 ........................... .l-32, 2-2 323.1.2 ....................... .l-11, 1-15, 1.48. 2-1, 6-06 323.2 .............................................. 3-9 323.2.1 ...................................... Table 323.2.2

[Table 323.2.11 . . . . . . . . . . . . . . . . . . . 1-12, 1-48, 1-65, 1-76, 2-19, 3-8, 4-01, 4-15

323.2.4 ........................................... 6-06 323.3 ........................................ 1-76, 5-13

[Table 323.2.21 . . . . . . . . . . . . . . .l-12, 1-76, 4-17, 5-19. 5-21 Table 323.3.1

323.3.5 ............................................ 2-9

328 ................................... 328.2 (327.51 . . . . . ........................ 1-66 328.2.1 [327.5.1, 32 328.5 (327.41 ..................................... 5-09

Fig . 328.5.2 [Fig . 327.4.21 . . . . . . . . . . . . .l-28, 5-12, 6-02, 6-05 328.5.4 [327.4.4] . . . . . . . . . .l-59, 1-74, 2-10, 4-03. 4-14, 7-08 Fig . 328.5.4 [Fig . 327.4.41 . . . . . . . .l-59, 1-74, 4-03, 4-16, 7-08 328.6 ............................................. 2-18 Table 331.1.1

[Table 331.3.11 . . . . . . . . . . . . . . . . . . . .. . l-69, 2.2. 5-06


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No . - 331.1.3 [331.3.6] ................... .l-39, 1.59. 4.06. 5-06 331.1.4 [33 1.1.21 ................................... 5.08 331.1.6 [331.3.4] ................................... 5.08 331.1.7 (331.3.21 ................................... 1.78 331.2.2 [331.1.1]. ........................... ..1.39, 1-78 332.2 (329.11 ........................... .1.23, 1.53, 4-02

340.2 [336.1.2] .................................... 1.26

340.4 [336.2] ...................................... 1.31

341.3.1 [336.5] ............................... .1.64, 2-4

332.4 [329.3, 330.21 ................................. 2.2 335.2 .............................................. 2-5

340.3 (336.31 ...................................... 1-10

341.2 [336.1.1, 336.1.31 ............. .1.10, 1.26, 1.27, 2-28

Fig . 341.3.2 [Fig . 327.4.11 ............................ 5.09 Table 341.3.2A

[Table 327.4.1Al ..... 1.1, 1.9, 1.14, 1.41, 2.8, 5.04, 5.13,

Table 341.3.26 [Table 327.4.161 ................ .5.18, 6-04 5-1 6, 5-1 7, 5-1 8, 5.20, 6.04, 7-06

341.3.4 (336.5, 336.5.41 ......... .1.62, 2.25, 2.32, 3.5, 3-14 341.4 [336.5] ...................... .1.24, 1.45, 3.12, 5-20

341.5.1 [336.6.1]. ............................. .1.5, 3-12 342.1 [336.4.1] .................................... 2.28 343 I336.4.1) ...................................... 2-28 344 [336.4] ....................................... 5-09 344.2 (336.4.21 .................................... 2.28 344.5 [336.4.5] ......................... .1.10, 1.60, 2-12 344.6 j336.4.61 .................................... 1.60 344.7 I336.4.71 .............................. .2.28, 3-14 345 13371 ........................... .1.2, 1.72, 2.31, 3-3

345.2.4 [337.4.3] ................................... 1.35

345.3 [337.3] ............................. 2.6, 3.10, 5-02

341.4.1 [336.5.1]. ............. 1.10, 1.26, 1.27, 1.60, 2.12, 2.28, 3.7, 3.12, 4-12, 5-10

345.1 [337.1] ....................... .1.4, 1.30, 4.04, 6-08

345.2.6 [337.1] ............................... .1.2, 5-22

345.4.2 [337.4.1] .............. .1.35, 1.61, 1.63, 2.23, 4-04


No . - 345.4.3 (337.4.21 ................................... 1.63

345.7 I337.5.21 .................................... 1.36 345.8 [337.6] ................................ .1.25, 3-10 345.9 [337.5.1] ......................... .4.09, 5.07, 6-08 A304.5.1 .......................................... 1-67 A327.2.4 .......................................... 7-09 K315 .............................................. 7.07 K322.3 ............................................ 7-07 M322.3 ...................................... .2.13, 3-6 M323.1.3 .......................................... 3-7 M326 ............................................ 2-13 M335.4 iM335.5, M335.61 ............................ 3.6 M341.4 [M336.5] ............................ .1.24, 1-45 M341.4.1 [M336.5.1] .......................... .2.28, 3-7 M345.1 ........................................... 6-08

345.5 (337.4.41 ......................... .l-35, 1.43, 6-08

Appendix A Notes (No equivalent) [(i411 .............................. 2.20 Note (1 7) ....................................... 4.18 Note (20) [í30)] .................................. 1.77 Note (57) [(2)] ................................... 1.58

Table A-1 [Table i] .......... 1.13, 1.16, 1.29, 1.38, 1-48, Appendix A

1.77, 2.1, 3.8, 3.9, 3.13, 4.12, 4.13, 6.01, 6.06, 7-03

Table A-16 [Table 11 .............. .1.78, 2.20, 4.18, 7-03 Appendix 0 .................... 1.6, 1.7, 1.34, 1.46, 1.55,

1.56, 1.71, 2.7, 2.24, 4.16, 5.01, 5.15, 6-06

Appendix E [Appendix K] ...................... .1.44, 5-10 Appendix F [F323.2] ................................ 1.29 Appendix C ....................................... 5.12 Appendix J ........................ .1.28, 1.54, 1.75, 5-04 Appendix M ....................................... 6.01 Case 137 ........................................... 3-1 Case 141 .......................................... 1.51


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Subiect

SUBJECT .. INDEX


Acceptance Criteria pressure tests ...................................... . l-2 weld ...................... 1.1. 1.9. 1.14. 1.41. 2.8. 5.09.

5-1 3. 5-1 7. 5-1 8. 5.20. 6.04. 7-06

Allowable Stresses ................................. 4.12 bases for .................................... .1.18. 3-13 for ASTM A 312 .................................... 1-29 for ASTM A 570 .................................... 1-38 for ASTM A 587 .................................... 1-13 for ASTM A 671 .................................... 1-48 for austenitic stainless steels ........................... 3-13

Alternative Tests for Category D fluid service .......................... 1.36 sensitive leak test .................................. . l-25

Authorized inspector ................ see Owner's Inspector

Bending .......................................... 4-02

Bends corrugated ........................................ . l-23 miter ................................... see Miter Bends

Bonds test assembly ...................................... 7.09

Bolting Materials .................................. 4-15

Branch Connections extruded outlets ......................... .1.37. 2.27. 6-09

weld requirements .............. 2.1 O. 4.03. 4-1 4. 7.02. 7-08 integrally reinforced fitting ............................ 4.05

Brazed joints for flammable service ................................ 1-1 7

Buckles ...................................... 1.23. 1-53

Category D Fluid Service alternative pressure test for .......................... . l-36 limitations ................................... .4.13, 5-03

Subiect ïnterpretation

No . -

Category M Fluid Service clarification of term ................................. i-73 leak test ........................................... 6.08 tubing size limitations ................................ 2.13 "very small quantity" ............................... . l-40

Code Coverage 831.3 versus 831.4 ........................... .1.47. 7-10 general hydrocarbon service .......................... 6.01 new and replacement piping .......................... 5.22 oil heating system ................................... 4.19 synfuel piant piping ........................... .1.52, 2-26 tobacco plant piping .................. .i ............... 3.1

Compressors internal piping ...................................... . l -8


Cyclic loading .................................... 5.12


conditions .......................................... 2-3 Lame theory ....................................... 1.57

Design)



Examination

in process ......................................... 3.14 progressive .................... .see Progressive Examination radiographic .................. see Radiographic Examination

extent of ..................................... 1.24. 5-18

random ........................... 1.27. 1.45. 1.62. 2.12. 2.32. 4-12

required ................................ . l-24, 1.60. 6-04 SpOt .............................................. 1-62 visual ............................................. 2.28

Exclusions for compressors and internal piping ..................... 1.8 for interconnecting piping ............................ 1.1 9

Expansion Joints .................................. . l -1 6


2 363 G- 7



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No . - Subiect Interpretation

No . -

Extruded Outlet pressure design of ............................. . l -21, 1-70 tees considered as .................................. 1.55

Extruded Welded l e e . . . . . ': ........................ 5.01

Fillet Weld size .............................................. 1-74

Fittings

flared. flareless. or 816.9 ........................................ 1.7. 5-01

compression types ................................. 3.6 MSS SP-75 ........................................ 1-11


' Flanges assembly ........................................... 2.5 design ....................................... .1.67. 3-4 long welding neck .................................. 4.05

use of aluminum .................................... 1.51 slip-on ............................................ 5-12

Flexibility Analysis exemptions from ................................... . l-33



in Appendix D ............................. .1.55, 2-24

Flexibility Factors basis for .......................................... 1.56 for 816.9 tees ....................................... 1.7 for fabricated intersections .................. .1.6, 4.16, 5-1 5 for welded elbows ................................... 1.6

Fluid Service general hydrocarbon ................................ 6-01 responsibility for

categorizing ...................................... 4-08


onset ........................................... 1-58

Hardness limitations on ....................................... 2.2

Heat Treatment cooling rate ........................................ 1.69 for austenitic stainless steel ........................... 1.65 for bending and forming .............................. 2.2 governing thickness . . . . . . . . . . . . . . . . . . l-39, 1.59, 4.06. 5-06 heating rate ........................................ 1-69 local . ............................................ 5-08 when radiography is

required .................................... .1.64. 2-4

Hydrostatic lests ......................... .see Leak Tests

Impact lests absorbed energy data ................................. 2.9 base metal ......................................... 4-01 exclusions from .............................. . l-76, 5-14 heat treatment required .............................. 5.19 of aluminum filler metals ............................. 2.19

. of austenitic stainless steel ........................... . l-65 of bolting materials .................................. 4.15 of the heat affected zone ....................... .1.76, 5-21 of weldments ...................... .1.12, 1.65, 1.76, 5-21 temperature limitation ............................... 5.14

Imperfections (see also Acceptance Criteria) concave root surface ........................... .1.1. 6-04 lack of fusion ...................................... 5.09 porosity ............................ .1.9. 5.13. 5.16. 5-20 slag inclusion ...................................... 5.20 tungsten inclusions ............................. .1.9. 5-17 undercutting ............................. . l-1 4. 2.8. 6-04

Installed Piping .................................... 1.30

Instrument Piping .................................. 7.07

Internal Piping, Equipment .......................... . 1-8


for circumferential welds ............................ . l-42 for longitudinal and spiral

welds ..................................... .1.78. 3-11

ASTM A 31 2. ASTM A 403 ......................... 2.20

Joints circumferential bands ................................ 5.11 exposed during test ............................ .2.6, 3-10 instrument tubing ................................... 7.07

Lateral Fitting ..................................... . 1-6

leak Tests acceptance criteria .................................. . l -2 alternative .............................. .4.09, 5.07, 6-08 for Category D fluid service ......................... . l -36 for system designed for

isolation of test pump ................................. 1.2 leakage ........................................... . 1-4 minimum hydrostatic test

pressure ................................... .2.23, 4-04 minor repairs and additions ........................... . 1-2 of discharge piping .................................. 1.72 of newly constructed

systems ............................... .1.4, 5.02, 5-22 of piping and vessel ................................. 1.63 of piping connecting

equipment ........................................ 3-3 of replacement piping ............................... 5.22 painting before test ........................ .2.6, 3.10, 5-23 preparation for ...................... .2.6, 3.10, 5.02. 5-23 reduced pressure

(hydrostatic test) ............................ .1.61, 2-23 temperature correction for ...................... . l-35, 1-43

O psi ........................................... 2-31

íd)

23644


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Interpretation No . - Subiect

lethal Substance ................................... 1.73

limitations on imperfections ......................... see Imperfections on hardness ........................................ 2-2 on tubing size .................................. 2.1 3. 3-6

l o w Temperature Requirements ......................... see Impact Tests

Materials API 5L .............................. 1.78. 2.4. 3.9. 3.11.

API 5LX ................................. ASTM A 234 ............................ ASTM A 312 ............................ ASTM A 403 ............................ ASTM A 537 ............................ ASTM A 570 ............................ ASTM A 587 ............................ ASTM A 633 ............................ ASTM A 658 .............................

6.01. 6-06 .......... 2.4 . . . . . . . . . 2.20 .29. 1.77. 2-20 ... . l-77, 2-20 .......... 2.1 ......... 1.38 . . . . . . . . . 1.13 . . . . . . . . . 1.11 .......... 3.8

ASTM A 671 ...................................... 1-48 ASTM 8 241 ....................................... 2-19 ASTM B 337 ....................................... 4-18 certification ........................................ 5-10 notch sensitive ..................................... 2-22 toughness requirements .............................. 5-19

Miter Bends pressure design of ............................. . l-22, 5-1 1



Nomenclature d ................................................ 1-54 T ................................................ 1-28 t" ................................................ 1-7s . T, .......................................... 5-04. 5-16


Occasional Variations (pressure/temperature allowances) ....... . l-3, 2-1 4. 4-1 1

loads ............................. .1.50. 2.15. 2.16. 2-17

Owner responsibilities ........................... . l-26, 2.30. 5-22

Owner's Inspector qualifications of ................................... . l-3 1 responsibilities of ................................... 1.26

Pipe in corroded condition ............................... 2.15 made from plate .................................... 1.48 of noncircular cross section ............................ 3.2 spiral welded ...................................... 7.03


No . - Pipe Supports configurations ...................................... 6.07 longitudinal stress effects ............................. 7.05 use of plastic ....................................... 1.49

Plastic pipe supports ...................................... 1-49




Pressure Design for elevated temperatures ............................. 3.4 in the high pressure range ........................... . l-68 of extruded headers ........................... .1.21, 1-70 of miter bends .................................... . l -2 1 of pipe ............................ 1.42. 1.54, 1.57. 1.68.

1.70. 2-1 1


Pressure Surges loads due to ...................................... . l-50

Pressure Temperature Rating ........................ 5.05

Progressive Examination ................... . l-5, 1.62. 3-5



random radiography ................. 1.27. 1.45. 1.62. 2.12.

records ........................................... 1-10 requirements ....................................... 6.04 selection of welds for

examination ...................................... 2-25 spot radiography. ............................. .1.62. 3-12 when PWHT is required ........................ .1.64. 2-4

100% ............................................ 5-09

2.32. 3-12

Records certificatiorr ........................................ 5.10 for radiographic examination .......................... 1.10 retention of ........................................ 1.10

Reinforcement. Branch attachment weld .............................. .4.03. 7-08 clarification of terms ................................. 1.37 limits of ........................................... 2.27

Repairs to welds .......................................... 2-18

Safeguarding ...................................... 5.12


Cumulative index . 631.3 Interpretations Vols . 1-7

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No . - Interpretation

No . -

Seismic loads ..................................... 4.07 stresses due to ..................................... 2.17


Standard Components manufacturers markings ............................... 3.7 valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-05

Standards compliance ........................................ 5-10 superseded ........................................ 1.44

Stresses (see also

displacement stress range ............................. 7.04 due to occasional loads .............................. 2.16 due to pressure surges .............................. . l-50 due to seismic loads ................................. 2.17 due to thermal gradients .............................. 3.4 longitudinal . .................. 1.20, 1.50, 2.15, 2.24. 4.10.

r

Allowable Stresses)

4.12. 6-03R (Vol . 7). 6.07. 7-05


basis for .......................................... 1.56 branch connections .................................. 2.7 for B16.9 tees ....................................... 1-7 for fabricated intersections ....................... .1.6. 5-15 for tees ........................... .1-46. 1.55. 1.71. 5-01 for welded elbows .................................. . l -6

application of .................... 1.34. 2.24. 6-03R (Vol . 7)

Temperature limitations ................................... .4.13. 5-14 reduction .......................................... 4.11

Tests pressure ............................... .see Pressure Tests sensitive leak ...................................... . l-25

Tubing joints ............................................. 7-07 limitations .................................... .2.13. 3-6

Thickness Allowances in stress calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.20

Unlisted components .................... .1.6. 1.51. 3.6. 4.05. 5-05 materials .................................. .see Materials

Visual Examination requirements ....................................... 2.28

Washers. Use of .................................... 2.5

Weld fillet size .......................................... 1.74 for branch connections .................... 2.1 O, 4.03. 4-14 imperfections ..................... ..see Acceptance Criteria longitudinal ............................. .2.20, 3-1 1. 4-1 8 qualification of position ............................. . l-66 reinforcement ...................................... 7.08 repair ............................................. 2-18 socket ...................................... .6.02. 6-05 spacing of ......................................... 7.02

Welding Procedures qualification of . . . . . . . . . . . . . . . . . l-1 2. 1.65. 1.66. 1.75. 4-17

(f)

2346


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