1、ASME B16.50-2001WROUGHT COPPERAND COPPER ALLOYBRAZE-JOINTPRESSURE FITTINGSAN AMERICAN NATIONAL STANDARDCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-AN AMERICAN NATIONAL STANDARDWROUGHT COPPER AND
2、COPPER ALLOYBRAZE-JOINT PRESSURE FITTINGSASME B16.50-2001Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-Date of Issuance: April 1, 2002The 2001 edition of this Standard is being issued with an autom
3、atic addendasubscription service. The use of addenda allows revisions made in responseto public review comments or committee actions to be published on a regularyearly basis; revisions published in addenda will become effective 1 yearafter the Date of Issuance of the addenda. The next edition of thi
4、s Standardis scheduled for publication in 2006.ASME issues written replies to inquiries concerning interpretations oftechnical aspects of this Standard. The interpretations will be included withthe above addenda service.ASME is the registered trademark of The American Society of Mechanical Engineers
5、.This code or standard was developed under procedures accredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate. The
6、 proposed code or standard was made available for public reviewand comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device,or activit
7、y.ASME does not take any position with respect to the validity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable letters patent, nor assumeany such lia
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9、interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued inaccordance with the established ASME procedures and policies, which precludes the issuanceof interpretations by individuals.No part of this
10、document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2002 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights Re
11、servedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-CONTENTSForeword vCommittee Roster viCorrespondence with the B16 Committee . vii1 Scope 11.1 1General 1.2 1Convention .1.3 1Unit
12、s of Measure .1.4 1References .1.5 1Quality Systems 2 Pressure-Temperature Ratings 12.1 1Rating of System .2.2 1Fitting Bursting Strength 3 Terminology . 23.1 2Abbreviations 3.2 2Definitions .4 Size 25 Marking 26 Material 27 Laying Lengths 58 Tube Stops 59 Inspection Tolerance 59.1 5Linear Dimension
13、s .9.2 6Ovality of Fitting End (C or FTG) 9.3 6Inside Diameter of Fitting 9.4 6Wall Thickness .10 Threaded Ends 610.1 6Countersink or Chamfer 10.2 6Threading Tolerances .10.3 6Design of Threaded Ends .11 Alignment . 612 Gauging . 612.1 6Preferred Gauging Method of Braze-Joint Ends 12.2 7Optional Gau
14、ging Method of Braze-Joint Ends .iiiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-12.3 7Standard Gauging Method of Threaded Ends .Figures1 Method of Designating Laying Lengths of Fittings and Openi
15、ngs of ReducerFittings 32 5Tube Stops 3 6Alignment .Tables1 2Rated Internal Working-Pressure for Copper Fittings (kPa) 2 5Inspection Tolerance 3 9Dimensions of Braze-Joint Ends .Mandatory AppendicesI 10U.S. Customary Equivalents .II 13References .Nonmandatory AppendicesA 14Fitting Rating B 15Quality
16、 System Program ivCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-FOREWORDIn 1994, the ASME B16 Committee authorized Subcommittee J Standardization to developa standard for wrought copper and copper
17、alloy braze-joint pressure fittings. These fittingsare intended for use with seamless copper tube conforming to ASTM Standard Specifications,B 88 (Water and General Plumbing Systems), B 280 (Air Conditioning and RefrigerationService), and B 819 (Medical Gas Systems). Following approval by the Standa
18、rds Committeeand ASME, this Standard was approved as an American National Standard on October 11,2001, with the new designation ASME B16.50-2001.Requests for interpretation or suggestions for revision should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers (ASME I
19、nternational),Three Park Avenue, New York, NY 10016-5990.vCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME B16 COMMITTEEStandardization of Valves, Flanges, Fittings, Gaskets,and Valve Actuators(T
20、he following is the roster of the Committee at the time of approval of this Standard.)OFFICERSH. R. Sonderegger, ChairM. L. Nayyar, Vice ChairP. A. Reddington, SecretaryCOMMITTEE PERSONNELR. W. Barnes, Anric EnterprisesR. R. Brodin, Fisher Controls International, Inc.M. A. Clark, Nibco, Inc.A. Cohen
21、, Arthur Cohen and AssociatesC. E. Floren, Mueller Co.D. R. Frikken, Solutia, Inc.G. A. Jolly, Vogt Valve Co.W. G. Knecht, BW/IP International, Inc.R. Koester, The William Powell Co.W. N. McLean, Newco ValvesM. L. Nayyar, Bechtel Power Corp.P. A. Reddington, The American Society of Mechanical Engine
22、ersR. A. Schmidt, Trinity-Ladish Co.H. R. Sonderegger, Grinnell Corp.W. M. Stephan, Flexitallic, Inc.,T. F. Stroud, Ductile Iron Pipe Research AssociationR. E. White, Richard E. White and AssociatesD. A. Williams, Southern Company ServicesL. A. Willis, The Dow Chemical Co.W. R. Worley, Union Carbide
23、 Corp.SUBCOMMITTEE JM. A. Clark, Chair, Nibco, Inc.D. F. Buccicone, Elkhart Production Corp.A. Cohen, Arthur Cohen and AssociatesD. R. Frikken, Solutia, Inc.T. L. Jamison, Mueller IndustriesA. G. Kireta, Jr. Copper Development Association, Inc.A. A. Knapp, Canadian Copper/Brass Dev AssnL. McDaniel,
24、Mueller Copper Fittings, LPG. E. Moino, The American Society of Mechanical EngineersviCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-CORRESPONDENCE WITH THE B16 COMMITTEEGeneral. ASME Standards are
25、developed and maintained with the intent to represent theconsensus of concerned interests. As such, users of this Standard may interact with theCommittee by requesting interpretations, proposing revisions, and attending Committeemeetings. Correspondence should be addressed to:Secretary, B16 Main Com
26、mitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990Proposing Revisions. Revisions are made periodically to the Standard to incorporatechanges that appear necessary or desirable, as demonstrated by the experience gained fromthe application of the Standard. Appro
27、ved revisions will be published periodically.The Committee welcomes proposals for revisions to this Standard. Such proposals shouldbe as specific as possible, citing the paragraph number(s), the proposed wording, and adetailed description of the reasons for the proposal, including any pertinent docu
28、mentation.Interpretations. Upon request, the B16 Committee will render an interpretation of anyrequirement of the Standard. Interpretations can only be rendered in response to a writtenrequest sent to the Secretary of the B16 Main Committee.The request for interpretation should be clear and unambigu
29、ous. It is further recommendedthat the inquirer submit his/her request in the following format:Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the interpretationis being requested.Question: Phrase the questi
30、on as a request for an interpretation of a specificrequirement suitable for general understanding and use, not as a requestfor an approval of a proprietary design or situation. The inquirer mayalso include any plans or drawings, which are necessary to explainthe question; however, they should not co
31、ntain proprietary names orinformation.Requests that are not in this format will be rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if addition
32、alinformation that might affect an interpretation is available. Further, persons aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,”“certify,”“rate,” or “endorse” any item, construction, proprietary device,or activity.Attending Committee
33、Meetings. The B16 Main Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretaryof the B16 Main Committee.viiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permi
34、tted without license from IHS-,-Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-WROUGHT COPPER AND COPPERALLOY BRAZE-JOINT PRESSURE FITTINGS ASME B16.50-2001WROUGHT COPPER AND COPPER ALLOY BRAZE-JOIN
35、TPRESSURE FITTINGS1 SCOPE1.1 GeneralThis Standard establishes requirements for wroughtcopper and wrought copper alloy braze-joint seamlessfittings designed for use with seamless copper tubeconforming to ASTM Standard Specification, B 88(Water and General Plumbing Systems), B 280 (AirConditioning and
36、 Refrigeration Service), and B 819(Medical Gas Systems).This Standard covers joints assembled with brazingmaterials conforming to ANSI/AWS A5.8.This Standard is allied to ASME standards B16.18and B16.22. It provides requirements for fitting-endssuitable for brazing. This Standard covers:(a) pressure
37、-temperature ratings;(b) abbreviations for end connections;(c) size and method of designating openings of fit-tings;(d) marking;(e) material;(f) dimensions and tolerances; and(g) testing.1.2 ConventionFor the purpose of determining conformance withthis Standard, the convention for fixing significant
38、 digitswhere limits, maximum or minimum values, are speci-fied shall be “rounding off” as defined in ASTM E29. This requires that an observed or calculated valueshall be rounded off to the nearest unit in the lastright-hand digit used for expressing the limit.1.3 Units of MeasureThe values stated in
39、 either SI (metric) or US Custom-ary (in.-lb) units of measure shall be regarded separatelyas standard. Within the main text, SI units are given.For convenience, the customary units are shown inMandatory Appendix I. The values stated in each systemare not exact equivalents; therefore, each system sh
40、allbe used independently of the other.1NOTE: Combining values from the two systems may result innonconformance with the standard.1.4 ReferencesStandards and specifications adopted by reference inthis Standard are shown in Mandatory Appendix II,which is part of this Standard. It is not consideredprac
41、tical to identify the specific edition of each standardand specification in the individual references. Instead,the specific edition reference is identified in MandatoryAppendix II.1.5 Quality SystemsRequirements relating to the product manufacturersQuality System Programs are described in Nonmanda-t
42、ory Appendix B.2 PRESSURE-TEMPERATURE RATINGS2.1 Rating of SystemThe internal working pressure-temperature rating fora braze-joint system is dependent upon, not only fittingand tube strength, but also selection of valves andappurtenances.Pressure-temperature ratings for fittings and brazejoints to t
43、he dimensions of Table 3 (Table I3), madewith typical commercial brazing materials, shall beconsidered equal to the values given in Table 1 (Ta-ble I1).The internal working-pressure rating of the systemshall be the lowest of the values shown in Table 1 (TableI1) and those of the tube, valves, or app
44、urtenances.2.2 Fitting Bursting StrengthFittings manufactured to this Standard shall have anambient-temperature bursting-strength of at least fourtimes the 38C (100F) rated internal working-pressureas shown in Table 1 (Table I1).Copyright ASME International Provided by IHS under license with ASMENot
45、 for ResaleNo reproduction or networking permitted without license from IHS-,-WROUGHT COPPER AND COPPERALLOY BRAZE-JOINT PRESSURE FITTINGSASME B16.50-2001TABLE 1 RATED INTERNAL WORKING-PRESSURE FOR COPPER FITTINGS, kPaStandard WaterTube SizeNote (1) 29 38C 66C 93C 121C 149C 177C 204C18Note (2) 9690
46、8240 7750 7750 7590 6460 4840316Note (3) 7630 6490 6110 6110 5980 5090 3810146280 5340 5020 5020 4920 4190 3140385360 4560 4290 4290 4200 3570 2680124970 4220 3980 3980 3890 3310 2480584350 3700 3480 3480 3410 2900 2170344010 3410 3210 3210 3140 2670 20001 3400 2890 2720 2720 2660 2270 17001143020 2
47、570 2420 2420 2370 2010 15101122810 2390 2250 2250 2200 1870 14002 2500 2130 2000 2000 1960 1670 12502122310 1960 1850 1850 1810 1540 11503 2180 1850 1740 1740 1710 1450 10903122090 1770 1670 1670 1630 1390 10404 2020 1710 1610 1610 1580 1340 10105 1850 1570 1480 1480 1450 1230 9206 1720 1460 1380 1
48、380 1350 1150 8608 1860 1580 1490 1490 1460 1240 930GENERAL NOTES:(a) The fitting pressure-rating applies to the largest opening of the fitting.(b) The fitting pressure-rating is calculated, as shown in Nonmandatory Appendix A, then rounded down to the nearest unitof 10.NOTES:(1) For size designatio
49、n of fittings, see Section 4.(2)18nominal size is14O.D. seamless copper tube for refrigeration service, etc., as listed in ASTM B 280.(3)316nominal size is516O.D. seamless copper tube for refrigeration service, etc., as listed in ASTM B 280.3 TERMINOLOGY3.1 AbbreviationsThe following symbols are used to designate thetype of fitting end:C p braze-joint fitting end made to
