ASME B16.11-2016

ANAMERICANNATIONALSTANDARDASMEB16.11-2016(RevisionofASMEB16.11-2011)ForgedFittings,Socket-WeldingandThreadedASMEB16.11-2016(RevisionofASMEB16.11-2011)ForgedFittings,Socket-WeldingandThreadedANAMERICANNATIONALSTANDARDDateofIssuance:January20,2017ThenexteditionofthisStandardisscheduledforpublicationin2021.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.PeriodicallycertainactionsoftheASMEB16CommitteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesathttp://cstools.asme.org/astheyareissued.ErratatocodesandstandardsmaybepostedontheASMEWebsiteundertheCommitteePagestoprovidecorrectionstoincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedonthedateposted.TheCommitteePagescanbefoundathttp://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,norassumesanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.TheAmericanSocietyofMechanicalEngineersTwoParkAvenue,NewYork,NY10016-5990Copyright©2017byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CONTENTSForeword........................................................................vCommitteeRoster..................................................................viiCorrespondenceWiththeB16Committee.................................................viiiSummaryofChanges................................................................xListofChangesinRecordNumberOrder.................................................xii1ScopeandGeneral........................................................12PressureRatings.........................................................13SizeandType...........................................................84Marking................................................................85Material................................................................96Dimensions.............................................................97AdditionalTolerances.....................................................108ProofTesting............................................................10MandatoryAppendicesIDimensionsofFittingsinU.S.CustomaryUnits....................................11IIReferences..............................................................18NonmandatoryAppendicesAQualitySystemProgram.....................................................19Figures1MethodofDesignatingOutletsofReducingTeesandCrosses..........................92WeldingGapandMinimumFlatDimensionsforSocket-WeldingFittings..................10Tables1Socket-WeldingElbows,Tees,andCrosses........................................22Socket-WeldingCouplings,Bosses,Caps,andCouplets...............................33ThreadedElbows,Tees,andCrosses............................................44ThreadedStreetElbows.....................................................55ThreadedCouplings,Bosses,Caps,andCouplets...................................66PlugsandBushings........................................................77TypesofFittingsbyClassDesignationandNPSSizeRange...........................88CorrelationofFittingsClassWithScheduleNumberorWallDesignationofPipeforCalculationofRatings...............................................................89NominalWallThicknessofSchedule160andDoubleExtraStrongPipe..................8I-1Socket-WeldingElbows,Tees,andCrosses........................................12I-2Socket-WeldingCouplings,Bosses,Caps,andCouplets...............................13iiiI-3ThreadedElbows,Tees,andCrosses............................................14I-4ThreadedStreetElbows.....................................................15I-5ThreadedCouplings,Bosses,Caps,andCouplets...................................16I-6PlugsandBushings........................................................17ivFOREWORDTheSectionalCommitteeontheStandardizationofPipeFlangesandFittings,B16,organizedin1920undertheprocedureoftheAmericanStandardsAssociation(ASA),appointedasubgroupofSubcommittee3(nowSubcommitteeF)toinitiatethestandardizationofweldingfittingsinMay1937.Thefirstmeetingofthisgroupwasheldlaterthatmonth,andatitsmeetinginDecember1938,inNewYork,itwasagreedtoundertakethestan-dardizationofdimensionsofsocket-weldingfittingsandtoreferthisprojecttoanewdraftingsubgroup.Oneofthemostimportantdimensionsofthistypeoffittingrequiringstandardizationwasconsideredtobethedimensionfromthecenterlineofthefittingtothebottomofthesocket,sincefromthestandpointofthedesigningengineer,thisdimensiongovernsthelocationofadjacentpipewithreferencetotheentirepipinglayout.Anotherimportantitemforconsiderationwastheweldingfilletdimensions.ThedraftingsubgroupheldmeetingsinChicago,Detroit,andNewYorkinMarch1939andMayandOctober1940,respectively,andatthelastnamedmeeting,thecompleteddraftoftheproposedstandardwasdiscussed,andfurtherrevisionsweresuggested.WhenappliedtotheSeptember1940draft,thesechangesproducedtheMay1941draft,whichwaspreparedfordistributiontoindustryforcriticismandcomment.Thisdistributionresultedinanumberofhelpfulcomments.Themembersofthesubgroupagreedbymailthatmanyofthechangessuggestedshouldbeincorporatedinthereviseddraft(December1941).ProgressontheapprovalofthestandardwasdelayedbytheWorldWarII,afterwhich,afewmorechangeswereaddedtomaketheproposalacceptabletoallconcerned.Thereviseddraft(April1946)wasthensubmittedtothemembersofthesectionalcommitteeforletterballotvote.Followingtheapprovalofthesectionalcommittee,theproposedstandardwasnextapprovedbythesponsorbodiesandpresentedtotheASAwithrecommendationforapprovalasanAmericanStandard.ThisdesignationwasgivenonDecember9,1946.In1960,itwasagreedthatthestandardneededacompleterevisionandsimultaneouslythatitshouldbeexpandedtocoverthreadedfittingsandplugs,thencoveredbyMSSSP-49andSP-50.ATaskForceworkeddiligentlyforfouryearsbeforearrivingatadraftthatwasacceptable.Theyalsofoundthatratingswereoutdatedandeliminatedthe4,000-lbclassesofthreadedfittings,assignedpressure-temperatureratingsforanumberofmaterials,andconvertedthesocket-weldfittingratingsto3,000and6,000lb.FollowingapprovalbytheSectionalCommitteeandSponsors,ASAapprovalwasgrantedonJanuary28,1966.FollowingdesignationchangesofASAtoANSIandSectionalCommitteetoStandardsCommittee,Subcommittee6beganconsiderationofchangesin1969.Earlyin1972,changesinthepressureclassdesignations,materials,andclar-ificationofwordingwereagreeduponandsubmittedforapproval.ThiswasgrantedonJune20,1973.Theworkofdevelopmentofthe1980editionofB16.11beganin1975whenthecommitteebeganconsiderationofcommentsandproposalsforchangethatwerereceived.Thedevelopmentprocedurewasarduousinthatanumberofballotsweretakenthatelicitedmanyadditionalcommentsandcounterproposals.Themajorchangesincludedanexpandedscopeforbetterdefinition,requirementsforconformancemarking,aNonmandatoryAnnexwithprovisionsforprooforbursttesting,andtheinclusionofmetricequivalents.FollowingapprovalbytheStandardsCommitteeandCo-Secretariat,finalapprovalbyANSIwasgrantedonOctober6,1980.In1982,AmericanNationalStandardsCommitteeB16wasreorganizedasanASMECommitteeoperatingunderproceduresaccreditedbyANSI.The1991editionofthestandard,retitled“ForgedFittings,Socket-WeldingandThreaded,”incorporatedforgingmateriallistedinTable1ofASMEB16.34-1988,includingGroup3materialthatwasnotpreviouslycoveredinB16.11.The1991editionestablishedU.S.Customaryunitsasthestandard.Otherclarifyingandeditorialrevisionsweremadetoimprovethetext.FollowingapprovalbytheStandardsCommitteeandASME,finalapprovalbyANSIwasgrantedonMarch4,1991.In1996,metricdimensionswereaddedasanindependentbutequalstandardtotheinchunits.FollowingapprovalbytheStandardsCommitteeandASME,thisrevisiontothe1991editionofthisStandardwasapprovedasanAmericanNationalStandardbyANSIonDecember16,1996,withthenewdesignationASMEB16.11-1996.In2000,theStandardsCommittee,ASME,andANSIapprovedanaddendatothisStandardtoremovepartialcompli-ancefittingsandnonstandardmaterialrequirements.DuetoanASMEpolicychangeconcerningthepublishingofaddenda,theintendedaddendachangeswereincorporatedintothe2001edition.vThreadedendstreetelbowrequirementswereincorporatedintothe2004edition.FollowingapprovalbytheStandardsCommitteeandASME,therevisiontothe2001editionwasapprovedasanAmericanNationalStandardbyANSIonSeptember30,2005withthedesignationASMEB16.11-2005.Anumberoftechnicalrevisionsweremadealongwithformatandreferencerevisions,suchasmaterialmarkingrequirements.FollowingapprovalbytheStandardsCommitteeandASME,therevisiontothe2005editionwasapprovedasanAmericanNationalStandardbyANSIonJuly9,2009withthedesignationASMEB16.11-2009.ThisrevisionwasapprovedbytheAmericanNationalStandardsInstituteonDecember2,2011.Inthis2016Edition,provisionshavebeenmadetoupdateverbiageandreadings.FollowingtheapprovalbytheASMEB16StandardsCommittee,approvalasanAmericanNationalStandardwasgivenbyANSIonOctober21,2016,withthenewdesignationASMEB16.11-2016.viASMEB16COMMITTEEStandardizationofValves,Flanges,Fittings,andGaskets(ThefollowingistherosteroftheCommitteeatthetimeofapprovalofthisStandard.)STANDARDSCOMMITTEEOFFICERSR.M.Bojarczuk,ChairC.E.Davila,ViceChairC.Ramcharran,SecretarySTANDARDSCOMMITTEEPERSONNELA.Appleton,AlloyStainlessProductsCo.,Inc.J.E.Baker,DezurikWaterControlsR.W.Barnes,AnricEnterprises,Inc.P.Milankov,Alternate,AnricEnterprises,Inc.K.Barron,WardManufacturingD.C.Bayreuther,MetsoAutomation,FlowControlDivisionW.B.Bedesem,ConsultantR.M.Bojarczuk,ExxonMobilResearchandEngineeringCo.A.M.Cheta,QatarShellGTLM.A.Clark,Nibco,Inc.P.V.Craig,JomarGroupG.A.Cuccio,CapitolManufacturingCo.C.E.Davila,CraneEnergyJ.D’Avanzo,FluorosealValvesB.G.Fabian,PennsylvaniaMachineWorksF.Feng,ChinaProductivityCenterforMachineryD.R.Frikken,BechtEngineeringCo.R.B.Hai,RBHAssociatesG.A.Jolly,SamshinLtd.M.Katcher,HaynesInternationalA.G.Kireta,Jr.,CopperDevelopmentAssociation,Inc.T.A.McMahon,EmersonProcessManagementM.L.Nayyar,NICEW.H.Patrick,TheDowChemicalCo.D.Rahoi,CCM2000C.Ramcharran,TheAmericanSocietyofMechanicalEngineersD.F.Reid,VSPTechnologiesR.A.Schmidt,CanadoilJ.Tucker,FlowserveF.R.Volgstadt,VolgstadtandAssociates,Inc.SUBCOMMITTEEF—STEELTHREADEDANDWELDINGFITTINGSB.G.Fabian,Chair,PennsylvaniaMachineWorksR.A.Schmidt,ViceChair,CanadoilE.Lawson,Secretary,TheAmericanSocietyofMechanicalEngineersA.Appleton,AlloyStainlessProductsCo.,Inc.G.A.Cuccio,CapitolManufacturingCo.K.W.Doughty,CB&IAlloyPipingProductsJ.P.Ellenberger,RetiredD.R.Frikken,BechtEngineeringCo.P.W.Heald,BonnyForgeCo.D.Hunt,Jr.,FastenalG.A.Jolly,SamshinLimitedF.Kavarana,CBIInc.C.J.Lafferty,U.S.DropForgeCo.W.Pritzl,ErneFittingsGmbHJ.P.Tucker,FlowserveCorp.G.T.Walden,WolseleyM.M.Zaidi,JacobsEngineeringGroup,Inc.viiCORRESPONDENCEWITHTHEB16COMMITTEEGeneral.ASMEStandardsaredevelopedandmaintainedwiththeintenttorepresenttheconsensusofconcernedinterests.Assuch,usersofthisStandardmayinteractwiththeCommitteebyrequestinginterpretations,proposingrevisionsoracase,andattendingCommitteemeetings.Correspondenceshouldbeaddressedto:Secretary,B16StandardsCommitteeTheAmericanSocietyofMechanicalEngineersTwoParkAvenueNewYork,NY10016-5990http://go.asme.org/InquiryProposingRevisions.RevisionsaremadeperiodicallytotheStandardtoincorporatechangesthatappearnecessaryordesirable,asdemonstratedbytheexperiencegainedfromtheapplicationoftheStandard.Approvedrevisionswillbepublishedperiodically.TheCommitteewelcomesproposalsforrevisionstothisStandard.Suchproposalsshouldbeasspecificaspossible,citingtheparagraphnumber(s),theproposedwording,andadetaileddescriptionofthereasonsfortheproposal,includinganypertinentdocumentation.ProposingaCase.Casesmaybeissuedtoprovidealternativeruleswhenjustified,topermitearlyimplementationofanapprovedrevisionwhentheneedisurgent,ortoproviderulesnotcoveredbyexistingprovisions.CasesareeffectiveimmediatelyuponASMEapprovalandshallbepostedontheASMECommitteeWebpage.RequestsforCasesshallprovideaStatementofNeedandBackgroundInformation.TherequestshouldidentifytheStandardandtheparagraph,figure,ortablenumber(s),andbewrittenasaQuestionandReplyinthesameformatasexistingCases.RequestsforCasesshouldalsoindicatetheapplicableedition(s)oftheStandardtowhichtheproposedCaseapplies.Interpretations.Uponrequest,theB16StandardsCommitteewillrenderaninterpretationofanyrequirementoftheStandard.InterpretationscanonlyberenderedinresponsetoawrittenrequestsenttotheSecretaryoftheB16StandardsCommittee.RequestsforinterpretationshouldpreferablybesubmittedthroughtheonlineInterpretationSubmittalForm.Theformisaccessibleathttp://go.asme.org/InterpretationRequest.Uponsubmittaloftheform,theInquirerwillreceiveanautomatice-mailconfirmingreceipt.IftheInquirerisunabletousetheonlineform,he/shemaye-mailtherequesttotheSecretaryoftheB16StandardsCommitteeatSecretaryB16@asme.org,ormailittotheaboveaddress.Therequestforaninterpretationshouldbeclearandunambiguous.ItisfurtherrecommendedthattheInquirersubmithis/herrequestinthefollowingformat:Subject:Citetheapplicableparagraphnumber(s)andthetopicoftheinquiryinoneortwowords.Edition:CitetheapplicableeditionoftheStandardforwhichtheinterpretationisbeingrequested.Question:Phrasethequestionasarequestforaninterpretationofaspecificrequirementsuitableforgeneralunderstandinganduse,notasarequestforanapprovalofaproprietarydesignorsituation.Pleaseprovideacondensedandprecisequestion,composedinsuchawaythata“yes”or“no”replyisacceptable.ProposedReply(ies):Provideaproposedreply(ies)intheformof“Yes”or“No,”withexplanationasneeded.Ifenteringrepliestomorethanonequestion,pleasenumberthequestionsandreplies.BackgroundInformation:ProvidetheCommitteewithanybackgroundinformationthatwillassisttheCommitteeinunderstandingtheinquiry.TheInquirermayalsoincludeanyplansordrawingsthatarenecessarytoexplainthequestion;however,theyshouldnotcontainproprietarynamesorinformation.viiiRequeststhatarenotintheformatdescribedabovemayberewrittenintheappropriateformatbytheCommitteepriortobeinganswered,whichmayinadvertentlychangetheintentoftheoriginalrequest.ASMEproceduresprovideforreconsiderationofanyinterpretationwhenorifadditionalinformationthatmightaffectaninterpretationisavailable.Further,personsaggrievedbyaninterpretationmayappealtothecognizantASMECommitteeorSubcommittee.ASMEdoesnot“approve,”“certify,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.AttendingCommitteeMeetings.TheB16StandardsCommitteeregularlyholdsmeetingsand/ortelephoneconfer-encesthatareopentothepublic.Personswishingtoattendanymeetingand/ortelephoneconferenceshouldcontacttheSecretaryoftheB16StandardsCommittee.ixASMEB16.11-2016SUMMARYOFCHANGESFollowingapprovalbytheASMEB16CommitteeandASME,andafterpublicreview,ASMEB16.11-2016wasapprovedbytheAmericanNationalStandardsInstituteonOctober21,2016.ASMEB16.11-2016includesthefollowingchangesidentifiedbyamarginnote,(16).TheRecordNumberlistedbelowisexplainedinmoredetailinthe“ListofChangesinRecordNumberOrder”followingthisSummaryofChanges.PageLocationChange2Table1Titleandtablerevisedinitsentirety(12-389)3Table2NewTable2added;previousTable2redesignatedasTable3andrevisedinitsentirety(12-389)4Table3RedesignatedasTable4andtitlerevised(12-389)42.2Revisedinitsentirety(13-632)5Table4(1)RedesignatedasTable5(12-389)(2)Titleandtablerevisedinitsentirety(12-389)(3)UnderNominalPipeSize1∕8,entriesaddedforClass6000forEnd-to-EndCaps,P,andMinimumEndWallThickness,G(16–351)6Table5(1)RedesignatedasTable6(12-389)(2)UnderNominalPipeSize2,entryforMinimumWidthFlats,C,revised(16-351)7Table6(1)RedesignatedasTable7(12-389)(2)FirstentryunderDescriptionrevised(16-351)8Table7RedesignatedasTable8(12-389)8Table8RedesignatedasTable9(12-389)8Table9RedesignatedfrompreviousTable8(12-389)95.1Lastsentencerevised(15-2823)12TableI-1Titleandtablerevisedinitsentirety(12-389)13TableI-2NewTableI-2added;previousTableI-2redesignatedasTableI-3andrevisedinitsentirety(12-389)14TableI-3RedesignatedasTableI-4(12-389)15TableI-4(1)RedesignatedasTableI-5(12-389)(2)Titleandtablerevisedinitsentirety(12-389)x(3)UnderNormalPipeSize1∕8,entriesaddedforClass6000forEnd-to-EndCaps,P,andMinimumEndWallThickness,G(16-351)16TableI-5RedesignatedasTableI-6(12-389)18MandatoryAppendixIIReferencesupdated(16-829)xiLISTOFCHANGESINRECORDNUMBERORDERRecordNumberChange12-389Updatedtablesinsertedthroughoutdocument13-632Toclarifyandcorrectpara5.1inB16.11–2011languagesoastonotdisallowbarstockasastartingmaterial.15-2823NPS1∕8Class6000capdimensionsaddedtoTables5andI-5,sincetheStandardhasrequirementsforoutsidediameterdimensionlistedforNPS1/8Class6000couplings,halfcouplings,andcaps;andinTable7indicatesClass6000couplingsandhalf-couplingsareavailableinNPS1∕8-416-351Table5data16-829MandatoryAppendixIIreferencesupdatedxiiFORGEDFITTINGS,SOCKET-WELDINGANDTHREADED1SCOPEANDGENERAL1.1ScopeThisStandardcoversratings,dimensions,tolerances,marking,andmaterialrequirementsforforgedfittings,bothsocket-weldingandthreaded,asillustratedinTables1through6andTablesI-1throughI-6,inclusive.1.1.1FittingTypes/Configuration.TypesoffittingscoveredbythisStandardareshowninTable7,byclassandsizerange.FittingsshowninTables1through6andTablesI-1throughI-6mayalsobemadewithcombinationsofsocket-weldingandthreadedends.1.1.2SpecialFittings.Fittingswithspecialdimen-sions,threads,orcounterboresmaybemadebyagree-mentbetweenthemanufacturerandpurchaser.WhensuchfittingsmeetallotherstipulationsofthisStandard,theyshallbeconsideredincompliancethere-with,providedtheyareappropriatelymarked(seesection4).1.1.3Welding.InstallationweldingrequirementsarenotwithinthescopeofthisStandard.InstallationweldingshallbeinaccordancewiththeapplicablepipingCodeorregulationcoveringthepipingsystemintowhichthefittingsareinstalled.1.2General1.2.1ReferencedStandards.Standardsandspecifica-tionsadoptedbyreferenceinthisStandardareshowninMandatoryAppendixII.Itisnotconsideredpracticaltoidentifythespecificeditionofeachstandardandspecifi-cationintheindividualreferences.Instead,thespecificeditionreferenceisidentifiedinMandatoryAppendixII.AfittingmadeinconformanceandconformingtothisStandard,inallotherrespects,willbeconsideredtobeinconformancetotheStandard,eventhoughtheeditionreferencemaybechangedinasubsequentrevisionoftheStandard.1.2.2CodesandRegulations.AfittingusedunderthejurisdictionoftheASMEBoilerandPressureVesselCode,theASMECodeforPressurePiping,oragovernmentalregulationissubjecttoanylimitationofthatcodeorregu-lation.Thisincludesanymaximumtemperaturelimita-tion,rulegoverningtheuseofamaterialatlowtemperature,or