ASME-B16.25-2012-Buttwelding-Ends-(English-Edition

ANAMERICANNATIONALSTANDARDASMEB16.25-2012(RevisionofASMEB16.25-2007)ButtweldingEndsCopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---CopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---ASMEB16.25-2012(RevisionofASMEB16.25-2007)ButtweldingEndsANAMERICANNATIONALSTANDARDThreeParkAvenue•NewYork,NY•10016USACopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---DateofIssuance:December20,2012ThenexteditionofthisStandardisscheduledforpublicationin2017.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.PeriodicallycertainactionsoftheASMEB16CommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesat://cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotificationwhenerrataarepostedtoaparticularcodeorstandard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.ASMEistheregisteredtrademarkofTheAmericanSocietyofMechanicalEngineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.TheAmericanSocietyofMechanicalEngineersThreeParkAvenue,NewYork,NY10016-5990Copyright©2012byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CopyrightASMEInternationalProvidedbyIHSunderlicensewithASMENotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---CONTENTSForeword..............................................................................ivCommitteeRoster.....................................................................vCorrespondenceWiththeB16Committee..............................................viSummaryofChanges..................................................................vii1Scope..............................................................................12TransitionContours.................................................................13WeldingBevelDesign...............................................................24PreparationofInsideDiameterofWeldingEnd........................................25Tolerances..........................................................................3Figures1MaximumEnvelopeforWeldingEndTransitions...................................42BevelsforWallThicknessOver3mm(0.12in.)to22mm(0.88in.),Inclusive........53WeldBevelDetailsforWallThicknessOver22mm(0.88in.)........................64WeldBevelDetailsforGTAWRootPass[WallThicknessOver3mm(0.12in.)to10mm(0.38in.),Inclusive]....................................75WeldBevelDetailsforGTAWRootPass[WallThicknessOver10mm(0.38in.)to25mm(1.0in.),Inclusive]....................................76WeldBevelDetailsforGTAWRootPass[WallThicknessOver25mm(1.0in.)]................................................................8Table1DimensionsofWeldingEnds.......................................................9MandatoryAppendicesIInchTable.........................................................................13IIReferences...................................................................