asme b16.25 bw ends interpret

7/29/2019 Asme b16.25 Bw Ends Interpret

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ASME B L b . 2 5 92 W 0757670052777838b W

INTERPRETATIONS TO A S M E 916.25(These interpretations are not part ofASME 616.25-1992 and are included for inform at ion only. )

INTRODUCTIONAs a service to persons who use the B16 standards, the B16 Committee renders interpretationsof the requirements upon request. The procedure for requesting an interpretation is described inthe following paragraphs.Th e interpretation s include all replies which have bee n approved by the B16 Main C omm ittee inresponse to inquiries concerning interpretatio n of this Standard.A n interpretation applies either to the Edition and Adde nda in effect on the date of issuance ofthe interpretation or theEdition and Addenda stated in the interpretation. Subsequent evisions to

this Standard may supersede the interpretation.PROCEDURE FOR REQUESTING INTERPRETATIONS

On request, the B16 Committee will ren der an nterpretatio n of any requirement of this Standard.Interpretations can only be rendered in response to a written request, which should be addressedto :Secretary, B16 Main Co mmitteeTh e American Society of M echanical EngineersUnited Engineering Center345 East 47th StreetNew York, NY 10017

The request for interpretation should be clear and unambiguous. It is further recommended thatthe inquirer submit his request using the following format:(u) Subject. Cite the applicable paragraph number(s) and/or give a concise description of thesubject.(b ) Question. Phrase the question as a request for a n interpretatio n of a specific requirementsuitable for general understanding and use, not as a request for an approval of a proprietary designor situation. The inquirer may also include any plans or drawings which are necessary to explainthe question; however, they should not contain proprietary nam es or information.Requests which are not in this format may be rewritten in this format prior to being answered,which may inadvertently change the original intent of th e request.ASME procedures provide for reconsideration of an interpretation w hen or if additional infor-mation is available which the inquirer believes might affect the interpretatio n. Further, person saggrieved by an interpretatio n may appeal to the cognizant ASME committee or subcommittee.ASME does not app rove, certify, rate, or end orse any item, construction, proprietary de-vice, or activity.

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INTERPRETATIONSNO. 1Replies t o Technical Inquiries Issued from January 1, 1987, through November 30, 1992

I n te rp re ta t ion : 1-1Subject: Finish of Buttwelding End sDa te Issued: April 19, 1991File:16-91-005

Question (l)? Do all buttwelding ends conforming toor partially machined finish to achieve final dimensions?

ASME/ANSI B16.25-1986 require a tota l

Reply (1): No.Question (2): Is an as-cast finish of buttwelding ends conforming to Figure 2(a), ASM E/ANSIB16.25-1986, including dimensions a nd tolerances, acceptable?Reply (2): Yes.

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ASME BLb.25 7 2 m 0757670 0527780 T 3 4 m

AMERICAN NATIONAL STANDARDSOR PIPING.PIPE FLANGES.ITTINGS. A ND VAL VESScheme for the Ident i f icat ion of Piping Systems ............................................ A13.11981(R1985)Pipe Threads. General Purpose Inch) .................................................... B1,20.1-1983(R1992)Dryseal Pipe Threads (Inch) ............................................................... 61.20.3-1976(R1991)Cast Iron P ipe Flanges and Flanged Fitt ings ....................................................... 616.1-1989Ma lleable Iron Threade d Fittings. Class 150 and 300 ............................................... 816.3-1985Cast Iron Threade d Fittings. Classes 125 and 250 .................................................. 616.4-1985Pipe Flanges and Flanged Fitt ings ................................................................ 616.5-1988Factory-MaderoughtFace-to-Face and End-to-E nd Dimen sions of Valves 816.10-1986Forged Fittings. S ocket-W eldingndhreaded B16.11-1991Cast Iron Threaded Drainage Fitt ings ............................................................ 816.12-1991Ferrous Pipe Plugs. Bushings. an d Locknuts with Pipe Thread s .................................... 616.14-1991Cast Bronze Threaded Fitt ings. Class 125 and 250 ................................................ 616.15-1985Cast Coppe r Alloy Solder Joint Pressure Fitt ings ................................................. 616.18-1984Ring-Joint Gaskets and Grooves for Steel Pipe Flanges ........................................... 616.20-1973Nonm etall ic Flat Gaskets for Pipe Flanges ....................................................... 616.21-1992Wroug ht Copper and Coppe r Alloy Solder Joint Pressure Fitt ings ................................. 616.22-1989Cast Copper Alloy Solder Joint Drainage Fitt ings - DW V ......................................... 616.23-1992Cast Co ppe r A lloy Pipe Flanges a nd Flange d Fittings. Class 150. 300. 400. 600. 900.1500. and 2500 ............................................................................ 616.24-1991Buttwelding Ends .............................................................................. 816.25-1992Cast Copper Alloy Fitt ings for Flared Copp er Tubes .............................................. 816.26-1988Wrou ght Steel B ut twelding Short Radius Elbows and Returns ..................................... 816.28-1986Wrought Cop per and Wrought Copp er Al loy Solder Joint Drainage Fi t t ings - DW V ................ B16.29-1986Cast Copper Alloyolderointi t t ingsoroventrainageystems 816.32-1992Manually Operated Metall ic Gas Valves for.Use in Gas Piping Systems Up to125 psig(Sizes Y2Through 2) ....................................................................... 616.33-1990Valves - Flanged. Threaded. and Welding End .................................................. 816.34-1988Orifice Flanges ................................................................................ 816.36-1988Large M etall ic Valves f or Gas Distribution (Manua lly Operated. NPS 24 to 12. 125 psig Ma ximum ) . . . B16.38-1985Mallea ble Iron Thread ed Pipe Unions. Classes 150. 250. and 300 .................................. 816.39-1986Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems ............. 816.40-1985Functional Qualif ication Requirements for Power Operated Active Valve Assembliesfo r Nuclear Power Plants ............................................................ B16.41-1983(R1989)Ducti le ron Pipe Flanges and Flanged Fitt ings. Class 150 and 300 ................................. B16.42-1987Wrought Copper and Copper Al loy Solder Joint Fi t t ings for Soventa Drainage System s............. 616.43-1982Cast Iron Fitt ings for Sovent@ Drainage Systems ................................................. 816.45-1987Large Diameter Steel Flanges (NPS 26 Throug h NPS 60) .......................................... 816.47-1990PowerPiping ................................................................................... B31.1-1989Fuel Gas Piping ................................................................................. 631.2-1968Liquid Transportation Systems for Hydrocarbons. Liquid Petroleum Gas.Anhydrous Ammonia. and Alcohols .......................................................... B31.4-1989RefrigerationPiping ............................................................................. 631.5-1987Gas Transm ission and Distribution Piping System s ................................................ 631.8-1989BuildingServicesPiping ......................................................................... B31.9-1988Slurry Transportat ion Piping Systems ........................................................... 831.1 1-1989ASME Guide f or Gas Transmission and Dist r ibution Piping Systems - 1986 (not an ANSI Standard) .............Manual for Determining the Remaining Strength of Corroded Pipel ines (not an ANSI Standard) ....... 631G-1991Welded and Seamless Wrought Steel Pipe ..................................................... B36.1OM-1985-StainlessSteel Pipe .......................................................................... B36.19M-1985Self-operate d and Power-Opera ted Safety-Related Valves Fun ctional Specif ication Standard. . N278.1-1975(R1984)

..................................................................................................................................................

..............................

Chemical Plant and Petroleum Refinery Piping .................................................... 631.3-1990

Th e ASME Publications Catalog sho ws a com plete l ist of al l the Standards publ ished b y the Society.For a com pl imentary catalog. or the latest informat ion about our publ icat ions. cal l I -800-THE-ASME(1.800.843.2763) .





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ASME B16.25 INTERPRETATIONSReplies to Technical InquiriesNovember 31, 1992, through December 31, 1996

INTRODUCTIONAs a service topersonswhouse he B 16 standards, the BI 6 Committeerenders interpretations of

the requirements upon request. The procedure for requesting an interpretation is described in thefollowing paragraphs.

The interpretations include all eplieswhichhavebeen approved by theB16Main Committee inresponse to inquiries concerning interpretation of this Standard.

An interpretation applies either to the Edition and Addenda in effect on he date of issuance of theinterpretation or theEdition ndAddenda tated in the interpretation. Subsequent revisions to hisStandard may supersede the interpretation. These interpretationsare notapart of ASME B16.25or its addenda.

PROCEDURE FOR REQUESTING INTERPRETATIONSOn request, the BI6 Committee will render an interpretation of any equirement of this Standard.

Interpretations canonlybe endered in response o a written equest,whichshouldbe addressed to:Secretary, B 16 Main CommitteeThe American Society of Mechanical EngineersUnited Engineering Center345 East 47th StreetNew York, N Y 10017

The request for interpretation should be clear and unambiguous. It is further recommended hat he

(a) Subject. Cite the applicable paragraph number(s) and/or give a concise description of the subject.( 6 ) Question. Phrase the question as a request for an interpretation of a specific requirement suitablefor general understanding and use, not as a request for an approval of a proprietary design or situation.The inquirer may also include anyplans or drawings which are necessary to explain the question;however, they should not contain proprietarynames or information.

Requestswhich are not in this ormat may be ewritten in this ormat prior tobeing answered,whichmay inadvertently change the original intent of the request.

ASME procedures provide for reconsideration of an interpretation when or if additional informationis available which the inquirer believesmight affect th e interpretation. Further,persons aggrieved byan interpretation may appeal to he cognizant ASME committee or subcommittee. ASME does notapprove, certify, rate, or endorse any item, construction, proprietary device, or activity.

inquirer submithis equestusing he following format:

5YRIGHT 2002; American Society of Mechanical Engineers Document provided by IHS Licensee=INSTITUTO MEXICANO DEL PETROLEO/3139900100,

User=, 07/12/2002 12:37:56 MDT Questions or comments about this message: pleasecall the Document Policy Management Group at 1-800-451-1584.


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S T D - A S M E BLb.25 I N T - E N G L L77b 0 7 5 9 b 7 0 0580707 310

ASME B16.25 Interpretations No. 2 2-1, 2-2Interpretation: 2-1Subject: Internal Transition of Buttwelded PipeDate Issued: September 27, 1993File: B 16-93-0 12

Question: Are the requirements for the internal transition of a 4 in. Schedule 40 pipe when, buttweldedto 4 in . Schedule 10 pipe using a gas tungsten arc welding (GTAW) root pass procedure covered by ASMEB 16.25-1 992?

Reply: No. See Section 2.

Interpretation: 2-2Subject: Counterbore End PreparationsDate Issued: August 24 , 1995File: B 16-95-002

Question: When providing counterbore end preparations in accordance with ASME B16.25-1992, Fig.2, 3 , 5, or 6, is i t necessary to have a tapered transition in the inside diameter within the 2tmi, ransitionregion as long as the provided slope or alternate radius does not break the solid 1:3 maximum slope line?

Reply: No . Figure 1 allows any slope to be used in the 2tminransition region.

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YRIGHT 2002; American Society of Mechanical Engineers Document provided by IHS Licensee=INSTITUTO MEXICANO DEL PETROLEO/3139900100,User=, 07/12/2002 12:37:56 MDT Questions or comments about this message: pleasecall the Document Policy Management Group at 1-800-451-1584.

asme b16.25 bw ends interpret

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