asme b31.8 interpretations 8

8/18/2019 Asme b31.8 Interpretations 8

1/18

\ ~ :

ASME 83 3

I

INTERPRETATIONS NO

Replies to Technical Inquiries

May 1 1989 Through May 31 1990

General Information

It has been agreed to publish interpretations issued by the 831


2/18

83 3

Subject

Fig. 328.4.4; 8ranch Pipe Projection Into Run Pipe

Fig. 328.5.28; Double-Welded Slip-On Flange - Dimension ••• ' .'

Paras. 300 and 300 1 and Fig. 300 1 1 Applicability -

Offshore

PIatfonn

•••••••••••••••••

Paras. 300(b) and 300 2 and Appendix M; Oassiflcadon of fluid 5erYlce, t arge

Temperature Changes

Paras. 3OO(c)(2) and 323.3.4; Impact Testing Methods and cceptanceCriteria

Below - 32O F

Paras.

3 1 1

and 300.2; Rules for In·Une Sensing Devices

Paras. 302.2.4 and 345.4; Maximum Allowable

Valve

Body cavity

Pressure •••••••••••••••

Para 302.3.2 and Table A-1; Stress Value for A387, 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 1028.5.4; Area Replacement -

DefInitions •••••••••••

Para

304.5.1 and Table A-1; MaterialslFittings - Use

o

Two

Crades

Paras. 318 and 328.5.4; fillet Welds .

Paras. 323.1.1 and 323.1.2; Material

Reidentiflcatlon •••••••••••••••••••••••••••••••••••

Para 323.1.2 and Table 326.1; Material for Valve

Body

and

Internals .

Para 330; Preheat Requirements - Welding Procedure Specification•••••••••••••••••••••

Para 330.1;

Preheat

Temperature - Procedure Qualification .

Para 331.1.1; Postweld Heat Treatment .

Paras. 331.1.2, 331.3. , and 331.3.7; Temperature Monitoring

o

Stress

Relieving of Pipe Welds in

Series

••••••••••••••••••••••••••••••••••••••••••••••••••

Para.

331.1.7: Hardness Tests - Procedure QualIftcat10n Records

Para.

332.1; Use of Eibowiess Steel Pipe in 831.3 .

Para.

332.2.1: Bends - Requirements for .

Para 341.3.2 and Table 341.3.2A; cceptance

Criteria -

Uquid

Penetrant

and

Magnetic Particle .

Paras. 341.4.1 and 344.2:

Visual

examination - Small Bare Piping.

Paras. 341.4.1, 341.4.3, and 344.2.1: Visual examination - Intemallnspection .

Para. 341.4.l(c): CertifIcations and Records

•••••••••••••••••••••••••••••••••••••••••••

Paras. 341.4.2 and 341.5

and

Table 341.3.2A;

Category

0

Fluid

SeMc:e

Paras. 345 and 345.2.2:

Leak

Test

as Nondestructive

amlnatlon

Paras

345.1 and 345.9:

Leak

Testing

aras

A 3 ? 4 ~

~ 2 8 2 1

A328.2.5

and

A328.5: Bonding

QualJflcat10n

Test,

JOint

Umitations .

Para.

A314

and Table 314.2.1:

PIastlc

Uned Pipe - Use

o 5aeINed

FIanps

Paras. M307.2 and MA323.4.2:

Category

M Fluid SeMc:e

-

Double

Contained

Piping; Use ofValves

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·1: Dual Certified Materials

and

Components

Table 331.1.1; Heat Treatment Requirements

Table

A-1:

Minimum Ultimate Tensile Strength

and

Allowable Stresses for ASTM

B464,

Grade

20 Cb

Table A-1: Use of Plate Material for

Pipe

.

lr.lteJflldatlon

FileNo.

, 8-28

831·90-008

8-27 831·90-007

8-17 B31-89-017

8 09

B31-89-018

· 8-30

B31·9O.()10

;

8-01

B31-88-0288

8-04

831-89-007

, 8-25

831-89-051

8-16

831-89-036

· 8-06

831-89-009

· 8-37

831·90.()17

8-18

831-89-033

8-13 831-89-028

8-19

831-89-043

8-07

831-89-010

8-21

831-89-045

8-23

831-89-047

8 08

831-89-013

8-05

831-89-008

8-22 831-89-046

8-03

831-89-006

8-20 831-89-044

8-32

831·90.()12

8-26

831·90-001

8-10

831-89-019

8 02

831-88-030

8-38

831-89-049

8-31

831·90-011

8-15 831-89-035

8-14 831-89-034

8-33

831·90-013

8-35 831·90-015

8-12 831-89-023

8-29 831·90-009

8-34 831·90-014

8-24

831-89-050

: 8-11 831-89-020

8-36 831·90-016

81


3/18

B31 3 Interpretations No 8

8-01, 8-02, 8-03

I,· .

·

Interpretation: 8-01

Subject:

ASMf/ANSI 831.3-1987

Edition, Paras.

300.1.1 and 300.2;

Rules for In-Une

Sensing

Devices

Date

Issued:

May 22 1989

File:

831-88-0288

Question: Shall the· pressure containing

piping

components of an in-line sensing device

be

designed, fabricated,

examined,

and tested In accordance with the rules ASMf/ANSI 83 3

Reply: Yes; see the definitions

for

plping and piping components in

ASMf/ANSI

831.3,

para. 300.2.

See

also para. 300.1.1.

Interpretation: 8 02

Subject:

ASMf/ANSI 831.3-1987

Edition, Para.

341.4.1

c); CertifiCations

and Records

Date

Issued:

May

22, 1989

File: 831-88-030

Question: In

accordance

with ASMf/ANSI 831.3, para. 341.4.1

c),

can

manufacturers markings

on pipe, fittinp,

and

components be reprded as confirmation

material compliance with the

specifications1

Reply:

Yes.

Interpretation:

8 03

Subject: ASMf/ANSI 831.3-1987

Edition

With

Addenda Through

831.3b-1988,

Para.

332.1;

Use EJbowIess

Steel

Pipe in 831 3

Date Issued: May 22, 1989

File: B31-89-006

Question: In accordance

with

ASMf/ANSI B31.3

is

the use of pipe bending

permltted1

Reply:

Yes

see ASMf/ANSI 831.3, para. 332.1.

83


4/18

8-04 8-05 8-06


831.3 Interpretations No.8

Subject:

ASMf/ANSI

831.3-1987

Edition

With

Addenda

Through 831.3b-1988 Paras.

302.2.4 and 345.4;

Maximum Allowable Valve odycavity

Pressure

Date

Issued:

May

22

1989

File:

831-89-007

Question:

In

accordance

with

ASMf/ANSI

831.3 what is the maximum

pressure buildup

relative

to the pressure rating of the

valve

permitted

in

the

body

cavity?

Reply:

133

of the pressure rating of the valve provided that

all the

requirements

ASMEJ

ANSI

831.3 para. 302.2.4 are met. Also see para. 345.4 for pressure test requirements.

Interpretation:

8 0S

Interpretation:

8 6

Subject:

ASMfJANSI 831.3-1987 Edition With

Addenda Through

831.3b-1988 Para. 304.3.3

and

Appendix Hi

8ranch Reinforcement

Date

Issued: May

22

1989

File:

831-89-009

Question:

In

accordance with

ASMEJANSI

831.3 para. 304.3.3 is

the weld joint factor

for

calculating the required thickness of

the

branch

t always

equal

to 1

whether the branch

is lon-

gitudinally

welded or

ot

Reply: No. The

weld joint quality factor

for the branch in

accordanci;e with

para

302.3.4 shall

be used.

Note:

Example H 2

ofAppendix H

will

be reviewed

by

the.Committee for possible revision.

84


5/18

B31.3 Interpretations No. 8 8 07 8 08

:


Subject: ASMEIANSI

B31.3 1987

Edition

With

Addenda

Through

B31.3b 1988

Para.

323.1.2

and Table

326.1; Material

for Valve Body

and Internals

Date Issued:

May

22 1989

File:

B31-89·01

Question

1):

Is ASTM A487-1C formerly A487-1Q) an acceptable n aterial for valve bodies

within the scope of ASMEIANSI B31.31

Reply 1): Yes, if qualified as

an

unlisted material in accordance

withASMElANSI

B31.3, para.

323.1.2.

Question

2):

Are

valve

internal materials covered by ASMEIANSI

B31.31

Reply 2): ASMEIANSI B31.3

does not

cover

valve internal components except

by

reference

to

valve

standards

listed In Table

326.1.

Interpretation:

8 08

Subject:

ASMEIANSI

B31.3 1987

Edition,

Para

331.1.1;

Postweld

Heat Treatment

Date Issued: May 22 1989

File: B31-89-013

Question:

In accordanc,:

with ASMEIANSI

B31.3, para

331.1.1

is

postweld heat treatment

required in the welding procedure specification for

P-No.

1 materials when postweld heat treatment

is

needed solely for the

typ

of

service1

.

Reply: Yes, and the requirements for postweld heat treatment should

be

specified in the engi

neering design.

85


6/18

8-10


83 3 Interpretations No 8

Subject:

Subject: ASME/ANSI B31.3-1987 Edition With AddendaThrough B31.3b-1988,

Paras. 3OO b

and 300.2, and Appendix M; Classification of

Fluid

Service, Large Temperature

Changes

Date Issued: November 16, 1989

File:

B31-89-018

Question (1): Is it a requirement of S M ~ N S B31.3 that piping for liquid oxygen

LOX

t

- 2970F and 6000 psig be classified as Category M fluid service as defined in para. 300.21

Reply (1): No;

it is

the owners responsibility to determine which fluid services are to be

identified as Category M. See para. 3OO b 1 . Appendix M may e used

a guide in making such

determinations.

Question (2): Does ASME/ANSI B31.3 require that piping which undergoes a large, rapid tem

perature change

e

considered

to

experience severe cycle conditions as ~ n in para. 3 21

Reply (2): No.


ASME/ANSI B31.3-1987 Edition With Addenda Through B31.3b-1988, Paras.

341.4.1,341.4.3, and 344.2.1; Visual Examination - Intemallnspection


File:

B31-89-o19 '

Question:

Is

it the intent

ASME/ANSI

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

borescopes1

Reply: No.

he

intent

ASME/ANSI

B31.3, para. 344.2.1 is thatthe phr se •••

or

can e

exposed

to view... refers to direct visual examination. .

86


7/18

B31.3 Interpretations

No


8-11, 8-12, 8-13

Subject:

f .

Subject:

ASME/ANSI

831.3-1987 Edition, TableA-1; Minimum UltimateTensile Strength and

Allowable Stresses for

ASTM

8 464, Grade 20 Cb


File: 631-89-020

.

Question 1 : Are

th e

correct specified minimum tensile strength

SMTS

and basic allowable

stresses listed

in ASME/ANSI

831.3, Table A-1 for

ASTM

8464 Grade

20

Cb

UNS

N08020H

Reply 1 : No. The SMTS should be 80

ksi.

The basic allowable stresses are being revised for

inclusion

in

a future addenda to ASMEIANSI 831.3.

Quest ion 2 : For

ASTM

B464 Grade

20

Cb may

the

allowable

stresses in ASME

Boiler and

Pressure Vessel Code, Section

VIII,

Division 1, Table UNF-23.3

be

used ,for design of ASMEIANSI

831.3 piping.

Reply 2 :

Yes,

but the allowable stresses must

be

adjusted by

the appropriate

weld joint factor.

Interpretation: 8-12.

ASME/ANSI 831.3-1987 Edition With Addenda Through 831.3b-1988; Postweld

Heat Treatment -

se l

Welding

Date Issued: November 16 1989

File: 831-89-023,

Question: What are th e requirements of

ASME/ANSI

831.3 regarding preheating and postweld

heat treatment of rings or similar welded parts in th e manufacture

of

valvesl

Reply:

ASME/ANSI

831.3 does

no t

address this subject.


Subject:

ASME/ANSI

831.3-1987 Edition With Addenda Through 831.3b-1988, Paras. 318

and 328.5.4; FilletWelds

I .

f

.... ..:.:

Date

Issued:

November 16, 1989

File: 831-89-028

Question: Does

ASMEIANSI

831.3 pennit t he u se

of

fillet welds a s th e primary pressure con

taining welds for special proprietary jointsl

Reply:

Yes,

provided th e requirements

of ASME/ANSI

831.3, paras. 328.5.4 and

318

are met.

87

- _ _ _ ~ ~ _ ~ ~


8/18

8·14

88



Subject: ASME/ANSI B31.3-1987 Edition With Addenda Through B31.3b-1988,

Paras.

A304,

A328.2.1, A328.2.5, and A328.5; Bonding Qualification Test, Joint Umitations


File: 831-89-034

Question 1):

ApplYing

the rules ofASME/ANSI 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-ta-pipe joint required for solvent cemented joints

in

thennoplastic piping1

Reply

1):

Yes.

Question

2):

In

ASME/ANSI B31.3, para

A328.2.5 a ,

is

a pipe-ta-fitting joint required

for

hot

gas welded joints

in

thennoplastic

piping1

Reply

2);

Yes.

Question

3): Applying

the rules of

ASME/ANSI 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 ofASME/ANSI. B31.31

Reply 3): ASME/ANSI B31.3 does not address the issue of minimum burst strength.

Que,stion

4): Is

it in violation of

ASME/ANSI B31.3 to

conduct hot

gas

bonded welds with joints

that have a root face and root

gap

other than Va

in.1

Reply 4): No, ASME/ANSI B31.3, para. A328.5.2 a states recommendations for joint dimen

sions.

See

the requirements

para A328.2.1 b).

Question 5):

In ASME/ANSI

B31.3,

p r s

A328.S.3 and A328.S.4,

does

the

word fillet apply

to heat fusion joints1

Reply 5):

Yes.

Question 6):

ASME/ANSI

B31.3, para A328.S.3 b states that asserriblyof 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.

~ ~


9/18

.



8 15 8 16

Subject: ASMEIANSI 831.3-1987 Edition W it h Addenda 831.3b- 1988, Paras. 345.1 and

345.9;

eak

Testing

Date Issued: November 16, 1 989

File: 831·89-035

Quest ion 1): W here leak t esti ng a system follows gui deli nes under, ASMEIANSI 831.3,

para

345.1 c), does

ASMEIANSI

831.3 r equi re t hat all i tems under par a. 345. 9 be per formed 345.9.1,

345.9.2, and 345.9.3H

Reply 1): Yes

Quest ion 2): W here tying a newl y const ruct ed

ASMEIANSI

831.3 normal fluid service piping

system i nt o an existing piping system, and

the

tie-in weld cannot

be

i Olated for hydrostatic

or

pneumatic testing, and the conditions

para

345.1 c) do not apply,

what

does ASMEIANSI 831.3

require for leak testingl

Reply 2):

ASMEIANSI

B31.3 does not address leak testing under these circumstances.


Subject:,

ASMEIANSI 8 31 .3 -1 98 7 Edition With A dd en da Thro ugh 8 31 .3 b- 19 88 , Para.

302.3.5; Stresses due

to

Cold Spring

Date Issued: November 16 1989

File: 831-89-036

Question: In accordance with ASME/ANSI B31.3,

para

302.3.5 c), is it required to indude th e

stresses due

to

cold spring in the sustained longitudinal stress 5,

Reply: No•

89


10/18

8 17 8 18


B31.3 Interpretations No.8

c

Subject: ASME/ANSI B31.3-1987 Edition With Addenda

Through

B31.3b-1988, Paras. 300

and

300.1 and

Fig.

300.1.1,

Applicability

- Offshore Platform

Date Issued: December

4,

1989

File:

B31-89-o1 7

Question: At what 'point does the coverage

of

ASME/ANSI B31.3 end In piping connected to a

launcher/receiver

for

.a pipeline pig and a pipeli elriser on In offshore platform?

Reply: Except as stated in

para.

300.1.1 (c) and shown in Fig. 300.1.1, ASME/ANSI B31.3 does

not specify limits of coverage; it Is the owner s responsibility specify the appropriate B31 Code

break points. See para.

3OO(b)(1).

.


Subject: ASME/ANSI 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 (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 desilP be based on the allowable stresses

tabulated

in

ASME/ANSI

B31.3,

Table

A-1

for

the

straight

grade

through 100crF and for the L

grade

above 10000F?

Reply

(1): Yes

Question

2 :

May stainless steel

tlan

and

flanged fittings, that meet ASTM requirements

for

two grades (e.g. 304/304L

or

316/316l be qualified

by

ASME/ANSI B31.3,

para.

304.5.1

for

desilP'

temperatures above

ao


11/18

831.3 Interpretations

No 8


8-19,8-20,8-21

Subject: ASME/ANSI B31.3-1987 Edition, Paras. 323.1.1 and 323.1.2; Material Reidentifica

tion

Date Issued: May

7

1990

File: B31-89: 043

Quest ion 1): Does

ASME/ANSI

B31.3 require that materials conforming

to p r

323.1.1 or

323.1.2

be

reidentified after cutting for fabrication?

Reply 1): No.

Quest ion 2): Does ASME/ANSI B31.3 have qualification requirements for

an

individual who

reidentifies material?

Reply 2): No.


Subject:

ASME/ANSI

B31.3-1987 Edition, Para. 332.2.1; Bends - Requirements for


ile

B31-89-o44

Question: In accordance with

ASMEJANSI

B31.3,

para

332.2.1, is pennissible

to

reduce the

outside diameter of the bend

by

grinding if the wall thickness required

by

the

design is maintainedl

Reply: ASME/ANSI B31.3

does not

address this subject.


Subject:

ASME/ANSI

B31.3-1987 Edition With Addenda Through B31.3b-1988, Para. 330;

Preheat Requirements - Welding Procedure speeifie:atlon


ile

B31-89-Q45

Question:

In

accordance with

ASMEJANSI

B31.3, para. 330, for temperature

verifk:atIon

of preheat zone, and limitations

on

interruption of welding, is it required that the welding procedure

specification detail

these

requirements?

Reply: No.

91


12/18

8 22 8 23 8 24



No 8

Subject: ASME/ANSI 831.3 1987 Edition With Addenda Through 831.3b 1988 p. ara.

331.1.7; Hardness Tests Procedure Qualification Records

Date Issued: May

7

1990

File:

831 89 046

Question:

In

accoroance with ASME/ANSI 831.3 para 331.1.7 is it ~ u i r e that hardness tests

be verified on p r o e u r ~ qualification records?

Reply: No.


Subject: ASMFJANSI 831.3 1987 Edition With Addenda Through 831.3b 1988

Para

330.1;

Preheat Temperature Procedure Qualification

Date Issued: May

7

1990

File: 831 89 Q47

Question: In meeting the requirements of ASMFJANSI 831.3 para 330.1.1 for preheat tem-

peratures is t necessary to comply with the values in Table 330.1.1 or can the requirements o the

8PV Coc:Ie Section IX be used?

Reply: ASMFJANSI 831.3 Table 330.1.1 applies except for those values which are listed as

recommendations.


Subject: ASMFJANSI 831.3 1987 Edition With Addenda Through 831.3c 1989 Table

331.1.1; Heat Treatment Requirements

Date Issued: May

7 199

File: 831 89 050

Question:

In

meeting

the

requirements o

ASMFJANSI

831.3 Table 331.1.1 for heat treatment

of materials in P Nos.

SP-1

through SP 5 what heat treatment is

necessary

the engineering design

does not specify

the

requirements?

Reply:

ASME/ANSI

831.3

does

not

designate a specific heat treatrrient procedure for these

materials. For conformance with

ASME ANSI

831.3 the engineering design must establish proce-

dures in

accordance with Note

1

of Table 331.1.1.

92


13/18

83 3 Interpretations

No

8-25, 8-26, 8 27

f ~ ; }

I

·


Subject:

ASMEIANSI

B31.3-1987

Edition

With AddendaThrough B31.3c-1989,

Para.

302.3.2

and

Table

A j

Stress Value for A 387, Grade 9, Classes 1 and 2

Date Issued:

May

7,

1990

File:

B31-89-051

Question: Basic allowable stresses for listed materialsASTM A 387, Grade 9, Class 1 and Class

2 are not listed in

ASMEIANSI

B31.3.

May

the ·rules of para. 302.3.2 d) be used for calculating the

allowable stresses at

1000F for

ASTM

A

387, Grade 9, Classes 1 and

2

materials?

Reply: Yes.


Subject:

ASMEIANSI

B31.3-1987

Edition

With

ddenda

Through B31.3b-1988,

Paras

341.4.1 and 344.2; Visual Examination - Small Bore Piping

Date Issued:

May 7 1990

File:

B31-90-001

Question: Should small bore piping systems be excluded

from

ASMf/ANSI B31.3 because it is

impractical to conduct direct visual examination of internal imperfections?

Reply:

No. The engineering design may specify any measures necessary to supplement visual

examination within the requirements ofASMf/ANSI B31.3,

para.

344.2.


Subject: ASMf/ANSI B31.3-1987

Edition

With ddendaThrough B31.3c-1989, Fig. 328.5.2B;

Double-Welded Slip-On Flange - Dimension

Date Issued: May

7,

1990

File: B31-90-007

Question

1 :

Is ,it the intent

of

ASMf/ANSI B31.3, Fig. 328.5.2B sketch

1 ,

to have the inside

fillet weld some distance below

the

face of

the

slip-on flange?

Reply

1 :

Yes.

Question

2 :

What is the acceptable range of that dimension?

Reply

2 : ASMf/ANSI B31.3

does

not specify a range for that dimension.

93


14/18

8 28 8 29


831 3 Interpretations No

Subject: ASME ANSI B31.3-1987 Edition With Addenda Through B31.3c-1989, Fig 328.4.4;

Branch Pipe Projection Into Run Pipe

Date Issued: May

7 1990

File:

B31-90-008

Question: In accordance with

ASME ANSI

B31.3, Fig 328.4.4 sketch: c , is there a maximum

distance that the branch pipe can project into the run pipel

Reply: No


Subject:

ASME ANSI

B31.3-1987 Edition With AddendaThrough B31.3e-1989, Table 323.3.1

and Para. 328.2.1; Impact Requirements in Qualifying a Welding Procedure


File: B31-90-009

Question:

In

accordance with ASME ANSI B31.3,

p r

328.2.1

d ,

when impact testing

is re

quired

by

ASME ANSI B31.3 or

the

enBineering desisn In qualifying a welding procedure, does this

requirement apply

to both

fabricators and manufacturersl

Reply: Yes

94


15/18

B31.3

Interpretations No

8·30,8·31

-

/

;

t ~ ~ ~ · :


Subject:

ASME/ANSI

B31.3-1987

Edition

With Addenda

Through

B31.3c-1989,

Paras.

300 c 2 and 323.3.4; Impact Testing Methods and Acceptance Criteria

Below

-320°F


File: B31-90-010

Question 1 : Does ASME/ANSI B31.3 the use f other toughness testing methods in

place of Charpy impact testing for systems with a minimum design temperature below - 320°F?

Reply 1 : No.

Question

2 :

Does ASME/ANSI B31.3 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. s

para. 300 c 2.

Question

3 :

Can the Charpy testing requirements of

ASME/ANSI

B31.3 be satisfied

by

testing

at -320°F, even though the minimum design temperature is -423°F?

Reply 3 : No; see para. 323.3.4.

Interpretation:

8-31


Edition

With Addenda Through B31.3c-1989, Paras. 345

and

3 4 5 ~ ; Leak

Test as Nondestructive

Examination


File: B31-90-011

Question 1 :

In

accordance

with

ASME/ANSI

B31.3, para.

345, are all

forms

leak testing

described considered to

be

nondestructive examination?

Reply 1 :

No.

ASME/ANSI B31.3.does not dassify leak testing as examination.

Question 2 : Does ASME/ANSI

B31.3

have requirements for the personnel that perform leak

testing?

Reply 2 : No; however, the examination for leaks required in ASME/ANSI B31.3,

para.

345.2.2

should be by personnel qualified for visual examination.

95


16/18

8-32 8-33 8-34

Interpretation: 8·32

831.3 Interpretations No

r .:

\ >

Subject:

ASME/ANSI

B31.3·1987 Edition With Addenda Through

B31.3c-1989, Para.

341.3.2

and Table

341.3.2A; Acceptance Criteria -

Uquid

Penetrant

and Magnetic Particle

Date Issued:

May

7,

1990

File:

B31·90-012

Question:

In

accordance

with ASME/ANSI

B31.3,

para

341.3.2

for

the detennination of

an

imperfection using liquid penetrant or magnetic particle examination techniques is

it

the size of the

indication

or the size

the discontinuity that

is

used

in

the detennination

of

acceptance or

rejection?

Reply:

ASME/ANSI B31.3

specifies

liquid

penetrant and magnetic particle examination

for

the

detection of cracks only, and

all

cracks are rejectable.


Subject:

ASME/ANSI

B31.3·1987 Edition

With

Addenda

Through

B31.3c·1989 Para.

A314

and Table 314.2.1;

Plastic

tined

ipe Use of

Saewed

Flanges

Date

Issued:

May

7, 1990

File: B31·90-013

u e ~ o n

Does

ASME/ANSI

B31.3 prohibit

the

use of threaded flanges on plastic lined metallic

pipe?

Reply: No;

threaded joints within the size ranges and limitations

in

accordance

with ASME/ANSI

B31.3,

Table 314.2.1

may

be used. Safeguarding

may

be required; see Note

4)

Table 314.2.1.


Subject: ASME/ANSI 831.3-1987

Edition

With Addenda Through 831.3c·1989 Tables 326.1

and

A·1; Dual

Certified Materials and Components

Date Issued:

May 7,

1990

File:

B31·90-014

Question

1):

For temperatures not exceeding

10000F,

may ASME/ANSI

B31.3

piping systems

be

constructed

dual

certified stainless steels

e.g.

304/304U using

Table A·1 stresses for

the

straight grades?

Reply 1):

Yes.

Question

2): May

the pressure-temperature rating

for

the straight grade of

the

corresponding

materials

for

components listed

in

ASME/ANSI B31.3, Table 326.1

be

used?

Reply 2): The

requirements

the

referenced standards

apply.

96

£


17/18


8 35 8 36

. 1 . ·


Subject:

ASME/ANSI

B31.3-1987 Edition With Addenda Through B31.3c-1989, Paras.

M307.2 and MA323.4.2; Category M Fluid Service - Double Contained Piping;

Use of Valves

Date Issued: May 7, .1990

File: B31-90-015

Question 1 : Does

ASME/ANSI

B31.3

reqIJlre

the use double contained piping systems

for

Category M

Fluid

Service1

Reply

1 : No.

Question 2): Does ASMf/ANSI B31.3,

para.

MA323.4.2 permit the use of a double contained

thermoplastic piping

system

for

category M Fluid 5ervIce1

Reply

2 : No.

Question 3 : Does ASME/ANSI B31.3, para. M307.2 require the use of fire

s fe

fire tested)

valves

for

Category M

Fluid

Service1

Reply

3 : No.

.


Subject:

ASME/ANSI

B31.3-1987

Edition

With Addenda Through B31.3c-1989, Table A-1;

Use of teri l for Pipe

Date Issued:

May

7, 1990

File: B31-90-016

Question:

Is

pipe f bric ted In ccord nce

with

ASMf/ANSI B31.3, from a listed plate material

e.g., A 516Gr. 60) without refelence to a pipe specification such as ASTM A 671), acceptable per

ASME/ANSI B31.31

Reply: Yes.

97


18/18

8 37 8 38



No


Edition

With Addenda Throush B31.3c-1989 Para. 304.3.3

and Figs. 304.3.3 and K328.5.4;

Area

Replacement - DefInitions

Date Issued:

May

7

1990

File:

B31-90-017

Question: In accordance

with

ASME/ANSI

B31.3,

para. 304 3 3 what is the correct value of Tit

to be used in calculation for the branch connection shape shown in the lower half of Fig. K328.5.4?

Is

Tit based upon the reinforcing barrel of the fitting or the wall thickness of the matching branch

pipe?

Reply:

The

value of Tit to

be

used in calculation for the referenced fitting is the nominal

thickness of the reinforcing barrel less manufacturing

mill

tolerances provided that the inaeased

barrel thickness is uniform and extends at least to the limit shown

in,

Fig 304 3 3 Otherwise

Tit

is

the

nominal

thickness of the matching branch pipe less manufacturing mill tolerance.


Subject:

ASME/ANSI

B31.3-1987 Edition,

Paras.

341.4.2 and 341.5 and Table 341.3.2A; eat-

egory 0 Fluid service


File: B31-89-049

Question 1 : In accordance with ASME/ANSI B31.3, Table 341.3.2A what acceptance criteria

should be used for Category 0 Fluid service pipe welds which have been radiographed?

Reply 1 : ASME/ANSI B31.3 does not address radiography for Category 0

Fluid

service welds.

Question 2 :

In

accordance with ASME/ANSI B31.3

may

the owner specify radiography as a

supplementary examination to

be

performed on Category 0

Fluid ervicepiping?

Reply

2 :

Yes; in accordance with

ASME/ANSI

B31.3 para 341.5.

Question

3 :

In accordance with

ASME/ANSI

B31.3

para

341.4.2 and Table 341.3.2A if ra-

diography

is

performed on Category 0

Fluid

5ervk:e pipe welds and wu not specified by the

engineering design should the radiography be disregarded?

Reply

3 :

ASME/ANSI B31.3 does not address this subject.

98

asme b31.8 interpretations 8

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