ASME_B16.34-2020.pdf

Valves Flanged,Threaded,and Welding EndAN AM E R IC A N NAT IO NAL STANDARDASME B16.34-2020(Revision of ASME B16.34-2017)ASME B16.34-2020(Revision of ASME B16.34-2017)Valves Flanged,Threaded,andWelding EndAN AMERICAN NATIONAL STANDARDxDate of Issuance:January 29,2021The next edition of this Standard is scheduled for publication in 2024.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Periodically certainactionsoftheASMEB16CommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEwebsiteunder 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,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.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 selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor 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 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,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated 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 by 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 2021 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.viiCommittee Roster.xCorrespondence With the B16 Committee.xiIntroduction.xiiiSummary of Changes.xivList of Changes in Record Number Order.xv1General.12PressureTemperature Ratings.23Nominal Pipe Size.44Marking.45Materials.56Dimensions.67Pressure Testing.118Requirements for Special Class Valves.12Mandatory AppendicesIRadiography Examination:Procedure and Acceptance Standards.187IIMagnetic Particle Examination:Procedure and Acceptance Standards.189IIILiquid Penetrant Examination:Procedure and Acceptance Standards.190IVUltrasonic Examination:Procedure and Acceptance Standards.191VRequirements for Limited Class Valves.192VIBasis Equations for Minimum Wall Thickness.195VIIReferences.197Nonmandatory AppendicesARelationship Between Nominal Pipe Size and Inside Diameter.201BMethod Used for Establishing PressureTemperature Ratings.203CQuality System Program.211Figures1Method of Designating Location of Auxiliary Connections When Specified.142Butterfly Valve Body.153Thread Length for Auxiliary Connections.164Bosses for Auxiliary Connections.165Socket Welding for Auxiliary Connections.176Butt Welding for Auxiliary Connections.177Gate Body(Pressure Seal Bonnet).188Y Pattern Globe Body(Pressure Seal Bonnet).18iii9Angle Body(Pressure Seal Bonnet):Bonnet Same as Y Pattern Globe.1910Elbow Down(Pressure Seal Bonnet).1911Gate Body(Flanged Bonnet).2012Globe Body(Flanged Bonnet).2013Butterfly Body.2114Plug Body.2115Conduit Gate Body(Pressure Seal Bonnet).2216Dished Cover.2217Flat Cover.2218Top Entry Ball Valve.2319Swing Check.23V-1Limited Class Stress Area Limits.193Tables1Material Specification List:Applicable ASTM Specifications.242-1.1Ratings for Group 1.1 Materials.312-1.1CRatings for Group 1.1 Materials.322-1.2Ratings for Group 1.2 Materials.332-1.2CRatings for Group 1.2 Materials.342-1.3Ratings for Group 1.3 Materials.352-1.3CRatings for Group 1.3 Materials.372-1.4Ratings for Group 1.4 Materials.382-1.4CRatings for Group 1.4 Materials.392-1.5Ratings for Group 1.5 Materials.402-1.5CRatings for