1、AN AM E R IC AN NAT IO NAL STANDARDASME B16.50-2021(Revision of ASME B16.50-2018)Wrought Copper and Copper Alloy Braze-Joint Pressure FittingsASME B16.50-2021(Revision of ASME B16.50-2018)Wrought Copperand Copper AlloyBraze-JointPressure FittingsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,
2、NY 10016 USAxDate of Issuance:February 28,2022The next edition of this Standard is scheduled for publication in 2026.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Periodically certainactionsoftheASMEB16CommitteemaybepublishedasCases.Casesan
3、dinterpretationsarepublishedontheASMEwebsiteunder the Committee Pages at http:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsi
4、ncodesandstandards.Sucherratashallbeusedon the date posted.TheCommitteePagescanbefoundathttp:/cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotification when errata are posted to a particular code or standard.This option can be found on the appropriate CommitteePage after s
5、electing“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalance
6、dtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not“app
7、rove,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfring
8、ementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affilia
9、ted with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand policies,which precludes the issuance of interpretations b
10、y individuals.No part of this 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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2022 byTHE AMERICAN SOCIETY OF MECHANI
11、CAL ENGINEERSAll rights reservedCONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.viSummary of Changes.viiiList of Changes in Record Number Order.ix1Scope.12General.13PressureTemperature Ratings.14Terminology.15Marking.26Material.27Laying Lengths.28Tube Stops.29Inspection To
12、lerance.210Threaded Ends.211Alignment.312Gaging.3Mandatory AppendixIReferences.10Nonmandatory AppendicesAFitting Rating.11BQuality System Program.12Figures4.1-1Method of Designating Laying Lengths of Fittings and Openings of Reducing Fittings.78-1Tube Stops.911-1Alignment.9Tables3.1-1Dimensions of B
13、raze-Joint Ends.43.1-2Internal PressureTemperature Ratings for Copper Fittings,kPa(psi).69.2-1Inspection Tolerance.9iiiFOREWORDIn 1994,the ASME B16 Standards Committee authorized Subcommittee J,Standardization,to develop a standard forwrought copper and copper alloy braze-joint pressure fittings.The
14、se fittings are intended for use with seamless coppertubeconformingtothestandardspecificationsASTMB88(forwaterandgeneralplumbingsystems),ASTMB280(forairconditioningandrefrigerationservice),andASTMB819(formedicalgassystems).FollowingapprovalbytheStandardsCommittee and ASME,this Standard was approved
15、as an American National Standard on October 11,2001,with thedesignation ASME B16.50-2001.Inthe2013edition,referencestoASMEstandardswererevisedtonolongerlistspecificeditionyears;thelatesteditionofASMEpublicationapplies,unlessstatedotherwise.Alsointhe2013edition,Tables3andI-3includedamaximumcuplengthu
16、nderthecolumnheadingshownas“Depth,G.”FollowingapprovalbytheB16StandardsCommitteeandtheASMEsupervisory board,and after public review,the 2013 edition of the Standard was approved as an American NationalStandard by the American National Standards Institute(ANSI)on May 28,2013.Inthe2018edition,theU.S.CustomarytablesformerlyinMandatoryAppendixIweremergedwiththeSItablesinthemain text;the tables and figures were redesignated,Mandatory Appendix I was deleted,and the cross-references wereupdatedaccordin
