ASME B31 5 INTERPRETATIONS-2009 Interpretations to B31 5-1992 Refrigreration Piping (Includes Interpretation No 1 Through 8)《ASME B31 5解释文件》.pdf

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1、ASME B31.5 INTERPRETATIONSASME B31.5 INTERPRETATIONSVOLUME 8Replies to Technical InquiriesAugust 1, 2006 Through October 31, 2009FOREWORDIt has been agreed to publish intepretations issued by the B31 Committee concerning B31.5 aspart of the update service to the Code. The interpretations have been a

2、sssigned numbers inchronological order. Each interpretation applies either to the latest Edition or Addenda at thetime of issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequentrevisions to the Code may have superseded the reply.These replies are taken verbatim from

3、the original letters, except for a few typographical andeditorial corrections made for improved clarity.ASME procedures provide for reconsideration of these interpretations when or if additionalinformation that the inquirer believes might affect the interpretation is available. Further, personsaggri

4、eved 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.I-1ASME B31.5 INTERPRETATIONSInterpretation

5、: 8-1Subject: B31.5-2001 Edition, Branch ConnectionsDate Issued: October 26, 2006File: 06-1417Question: Are full penetration welds required when header-branch connections are made inthe style of Fig. 527.3.5-D, illustration (b)?Reply: Yes.I-2ASME B31.5 INTERPRETATIONSASME B31.5 INTERPRETATIONSVOLUME

6、 7Replies to Technical InquiriesAugust 1, 2001 Through July 31, 2006FOREWORDIt has been agreed to publish intepretations issued by the B31 Committee concerning B31.5 aspart of the update service to the Code. The interpretations have been asssigned numbers inchronological order. Each interpretation a

7、pplies either to the latest Edition or Addenda at thetime of issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequentrevisions to the Code may have superseded the reply.These replies are taken verbatim from the original letters, except for a few typographical andedito

8、rial corrections made for improved clarity.ASME procedures provide for reconsideration of these interpretations when or if additionalinformation that the inquirer believes might affect the interpretation is available. Further, personsaggrieved by an interpretation may appeal to the cognizant ASME co

9、mmittee 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.I-1ASME B31.5 INTERPRETATIONSInterpretation: 7-1Subject: B31.5-2001 Edition, ASTM A 53 Type F Furnace Bu

10、tt Welded PipeDate Issued: July 7, 2006File: 06-38Question: Is ASTM A 53 Type F furnace butt welded piping permitted for use in an anhydrousammonia refrigeration heat transfer component, if the design pressure does not exceed 150 psig?Reply: No.I-2ASME B31.5 INTERPRETATIONS VOLUME 6 Replies to Techn

11、ical Inquiries August 1,1994 Through December 31, 2000 interpretations 6-1 Through 6-5 It has been agreed to publish intepretations issued by the B31 Committee concerning B31.5 as part of the update service to the Code. The interpretations have been asssigned numbers in chronological order. Each int

12、erpretation applies either to the latest Edition or Addenda at the time of issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequent revisions to the Code may have superseded the reply. These replies are taken verbatim from the original letters, except for a few typogr

13、aphical and editorial corrections made for improved clarity. ASME procedures provide for reconsideration of these interpretations when or if additional information that the inquirer believes might affect the interpretation is available. Further, persons aggrieved by an interpretation may appeal to t

14、he cognizant ASME committee or subcommittee. As stated in the Statement of Policy in the Code documents, ASME does not “approve,” ceriify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. 21 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handl

15、ing ServicesB31.5 Subject B31.5-1992 Edition, Para. 523.2.2(0(4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B31.5-1992 Edition. Secondary Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B31.5-1992 Edition, Use of Bushings and

16、Reducers in Refrigerant Piping . . . . . . . . . . B31.5-1992 Edition. Use of Group A2, Class 3, and Ammonia in Refrigerant Piping . Interpretation of Pressure Testing of Refrigerant Equipment or Piping in B31.5 (1992 Edition, 1994 Addenda) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、 . . . . . . . . . . . . . . . Interpretation 6-2 6- 1 6-4 6-3 6-5 File No. B3 1-95-047 B31-94-033 B31 1-97-03 B3 1-96-059 B31-00-024 22 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling Services831.5 Interpretations Vol. 6 Interpretation: 6-1 Subject: B3 1.5-1992 Ed

18、ition, Secondary Coolant Date Issued December 6, 1995 File: B3 1-94-033 6-1, 6-2, 6-3 Question: Does the addition of an anti-freeze to water in a chilled water system make a “secondary Reply: Yes. coolant” that is included in the scope of B31.5? Interpretation: 6-2 Subject: B31.5-1992 Edition, Para.

19、 523.2.2(0(4) Date Issued: April 24, 1996 File: B31-95-047 Question (1): Does para. 523.2.2(0(4) of ASME B31.5-1992 apply to gray cast iron materials? Reply (1): No. Question (2): If the reply to Question (1) is no, are the allowable stresses for gray cast iron at -20F Reply (2): Yes. applicable dow

20、n to -150”F? Interpretation: 6-3 Subject: B31.5-1992 Edition, Use of Group A2, Class 3, and Ammonia in Refrigerant Piping Date issued: May 21, 1997 File: B31-96-059 Question (1): Is Group A2, Class 3, refrigerant piping in ASME B31.5-1992 the only refrigerant piping Reply (1): Yes. for which the ins

21、pection requirements of ASME B31.3, Chapter VI, are to be followed? Question (2): Is Group A2, Class 3, refrigerant piping in ASME B31.5-1992 the only refrigerant piping Reply (2): Yes. for which the testing requirements of ASME B31.3, Chapter VI, are to be followed? Question (3): What inspection an

22、d testing is recommended for ammonia refrigerant piping in ASME Reply (3): The requirements are in Chapter VI of B31.5. B31.5-1992? , 23 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling Services6-4, 6-5 B31.5 Interpretations Vol. 6 Interpretation: 6-4 Subject: B31.5

23、-1992 Edition, Use of Bushings and Reducers in Refrigerant Piping Date Issued December 19, 1997 File: B31-97-031 Question (i): Does the prohibition of couplings made of cast iron or malleable iron in ASME B31.5- Reply (I): No. 1992, para. 506.3, include bushings and reducers? Question (2): Can reduc

24、ing bushings made of cast iron or malleable iron be used in ammonia piping? Reply (2): Yes. Interpretation: 6-5 Subject: Interpretation of Pressure Testing of Refrigerant Equipment or Piping in B31.5 (1992 Edition, 1994 Addenda) Date Issued December 8, 2000 File: B3 1-00-024 Question: Can you provid

25、e any information or direction with regard to new codes or standards for pressure testing of refrigeration equipment or piping that “downgrade” the test pressure requirements from 1.5 times the MAWP to a lower fraction of 1.1 times the MAWP? . _ -. - - _ - - - - .- _ - - - - . Reply: No. 24 COPYRIGH

26、T American Society of Mechanical EngineersLicensed by Information Handling ServicesASME B31.5 INTERPRETATIONS NO. 5 Replies to Technical Inquiries October 1, 1991, Through July 31, 1994 Interpretations 5-1 Through 5-5 It has been agreed to publish interpretations issued by the B31 Committee concerni

27、ng B31.5 as part of the update service to the Code. The interpretations have been assigned numbers in chronological order. An interpretation applies to the 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 in

28、terpretation. 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.

29、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. In the case where an interpretation is corrected by Errata, the original interpretation n

30、umber with the suffi E is used. 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

31、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 B. 17

32、 831.5 interpretations No. 5 Interpretation: 5-1 Subject: 527.4.2, Examination of Welds Date Issued: June 8, 1992 File: B31-91-29 Question (1): Please clarify the reference to the word “cracks.” Does this refer to surface and/ or visual cracks? Reply (1): Yes. Question (2): Does this encompass crack

33、s that are nonvisual, subsurface Reply (2): No. Question (3): Is radiographic testing a method used in inspecting ASME/ANSI B31.5 type welding, or is it utilized for inspecting a more stringent welding procedure? Reply (3): No, B31.5 does not address radiographic testing. See Para. 536(a)(2) Interpr

34、etation: 5-2 Subject: 504.3.1, Branch Connection Sections Date Issued: March 2, 1993 File: B3 1-92-5 1 Question (1): Can pipe branches larger than Y4 the nominal diameter of run pipe be welded to a piping run as a branch connection without reinforcement? Reply (1): Yes, when the requirements of para

35、s. 504.3.1 and 527.4.6 are met. Question (2): Can Class 300 couplings or half couplings, of a nominal size larger than Y., the nominal diameter of a run pipe, be welded to a piping run as a branch connection without rein- forcement? Reply (2): Yes, when supported with calculations per para. 504.3 Qu

36、estion (3): Can an integrally reinforced branch connection, of a nominal size larger than /4 the nominal diameter of a run pipe, be welded to a run pipe as a branch connection? Reply (3): Yes, when the requirements in para. 504.3.1(e)(3) are met. 19 m 0759670 05q3875 OY9 5-3,5-4. 5-5 831.6 Interpret

37、ations No. 5 Interpretation: 5-3 Subject: Radiography Date Issued: March 2, 1993 File: B31-92-56 Question: To what specification should random radiography be evaluated when used on an ammonia refrigeration piping system? Reply: As specified in para. 527.4.2(d). Interpretation: 5-4 Subject: 523.2.2(f

38、)(4) Material Exempted From Impact Test Date Issued: May 19, 1993 File: B31-93-05 Question (1): What is the allowable stress for ferrous impact tested materials in a refrigerant piping system for metal temperatures between -20F and - 150F? Reply (1): Materials meeting the requirements of para. 523.2

39、.2, Impact Tests, may be used to the allowable stresses in Table 502.3.1 at temperatures not lower than the test specimens. Question (2): What is the allowable stress for piping material meeting the requirements of SA- 333 Grade 6 in a refrigerant piping systems with a metal temperature of -76“F? Re

40、ply (2): 40% of allowable stresses in Table 502.3.1. Interpretation: 5-5 Subject: ASME B31.5-1992 Edition, Para. 502.2.6 Date Issued: May 11, 1994 File: B31-94-30 Question: Does para. 502.2.6 permit welding to standards not permitted by para. 527.4.2(d) Reply: No. 20 ASME B3L.5 87 0759670 0500573 L

41、ASME B31.5 INTERPRETATIONS NO. 4 Replies to Technical Inquiries April 1, 1989, Through September 30, 1991 Interpretations 4-1 and 4-2 It has been agreed to publish interpretations issued by the B31 Committee concerning B31.5 as part of the update service to the Code. The interpretations have been as

42、signed numbers in chronological order. An interpretation applies to the the Edition or Addenda stated in the interpretation or, if none is stated, to the Edition or Addenda in effect one the date of issuance of the interpretation. Subsequent revisions to the Code may have superseded the reply. These

43、 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 o

44、f a technical nature, In these cases, a revised reply bearing the original interpretation number with the suffix R is presented. In the case where an. interpretation is corrected by Errata, the original interpretation number with the suffix E is used. ASME procedures provide for reconsideration of t

45、hese 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, ASM

46、E 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 B. 13 , ASME 831.5 87 0759670 0500574 3 831.5 Interpretations No. 4 Interpretation: 4

47、-1 Subject: Paras. 508.3 and 508.8; Bolting Date Issued: December 26, 1990 4-1.4-2 File: B31-90-037 Question (1): According to ASME/ANSI B31.5, may SAE 429 Grade 2 material be used in lieu Reply (1): No, unless the physical properties of SAE 429 Grade 2 meet the requirements listed Question (2): Doe

48、s ASME/ANSI B31.5 require bolts made from materials other than ASTM of ASTM A 307 when bolting to cast iron flanges? in paras. 508.3 and 508.5. A 307 to be marked with the manufacturers mark? Reply (2): Yes, bolts must be marked according to the requirements of ASTM A 307. Interpretation: 4-2 Subjec

49、t: Para. 523.2.3; Materials Date Issued: March 19, 1991 - File: B31-90-055 c- Question (1): According to ASh4EVANSI B31.5, does para. 523.2.3 apply only to ASTM A 47 and A 48 materials? Reply (1): No. Question (2): According to ASME/AJ%I B31.5, does para. 523.2.3 apply to AS= A 126 or A 278 materials? Reply (2): Yes, with limitations as set forth in para. 523.2.3. T 15 i - c ASME/ANSI B31.5 Interpretations No. 3 Replies to Technical Inquiries February 1, 1987, Through March 31, 1989 It has been agreed to publish interpretations issued by the B31 Committee concerning B31.5 as p