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ASME_B16.9-2007.pdf

ASME_B16.9-2007.pdf

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Factory-MadeWroughtButtweldingFittingsANAMERICANNATIONALSTANDARDASMEB16.9-2007(RevisionofASMEB16.9-2003)ASMEB16.9-2007(RevisionofASMEB16.9-2003)Factory-MadeWroughtButtweldingFittingsANAMERICANNATIONALSTANDARDThreeParkAvenue•NewYork,NY10016DateofIssuance:December7,2007ThenexteditionofthisStandardisscheduledforpublicationin2012.Therewillbenoaddendaissuedtothisedition.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.InterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesathttp://cstools.asme.orgastheyareissued.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,NY10016-5990Copyright2007byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CONTENTSForeword..............................................................................ivCommitteeRoster.....................................................................vCorrespondenceWiththeB16Committee..............................................vi1Scope.............................................................................12PressureRatings...................................................................13Size...............................................................................24Marking...........................................................................25Material...........................................................................26FittingDimensions.................................................................27SurfaceContours...................................................................38EndPreparation....................................................................39DesignProofTest..................................................................310ProductionTests...................................................................411Tolerances.........................................................................4Figure1MaximumEnvelopeforWeldingEndTransitions..................................18Tables1DimensionsofLongRadiusElbows...............................................52DimensionsofLongRadiusReducingElbows.....................................63DimensionsofLongRadiusReturns..............................................74DimensionsofShortRadiusElbows...............................................75DimensionsofShortRadius180-degReturns......................................86Dimensionsof3DElbows........................................................87DimensionsofStraightTeesandCrosses..........................................98DimensionsofReducingOutletTeesandReducingOutletCrosses.................109DimensionsofLapJointStubEnds...............................................1310DimensionsofCaps..............................................................1411DimensionsofReducers..........................................................1512WeldingBevelsandRootFace....................................................1713Tolerances........................................................................19MandatoryAppendicesIInchTables.......................................................................21IIReferences........................................................................35NonmandatoryAppendixAQualitySystemProgram..........................................................36iiiFOREWORDIn1921,theAmericanEngineeringStandardsCommittee,latertheAmericanStandardsAssocia-tion(ASA),organizedSectionalCommitteeB16tounifyandfurtherdevelopnationalstandardsforpipeflangesandfittings(and,later,forvalves,gaskets,andvalveactuators).CosponsorsoftheB16CommitteewereTheAmericanSocietyofMechanicalEngineers(ASME),theHeatingandPipingContractorsNationalAssociation[nowtheMechanicalContractorsAssociationofAmerica(MCAA)],andtheManufacturersStandardizationSocietyoftheValveandFittingsIndustry(MSS).Cosponsorswerelaterdesignatedascosecretariatorganizations.Standardizationofweldingfittingswasinitiatedin1937byasubgroup(designatedSubgroup6)ofSubcommittee3.Afterconsiderationofseveraldrafts,astandardwasapprovedbytheCommit-tee,cosponsors,andASA,andpublishedwiththedesignationASAB16.9-1940.Revisionsweremadein1950and1955toaddsizesuptoNPS24andtocompletecoverageoffittingsinsomesizes.TheserevisionswereapprovedandpublishedasASAB16.9-1951andASAB16.9-1958.WiththesubgroupnowdesignatedSubcommittee6(laterSubcommitteeF),furtherrevisionswerebeguntoclarifytheintentofthestandard,toaddangularitytolerances,andtoincludefittingsofdifferenttypes(longradiusreducingelbowsandcrosses)andsmallersizes(NPS1⁄4andNPS1⁄2).ThisrevisionwaspublishedasASAB16.9-1964afterASAapproval.AfterreorganizationofASA,firstastheUnitedStatesofAmericaStandardsInstitute(USASI),thenastheAmericanNationalStandardsInstitute(ANSI),withtheSectionalCommitteebeingredesignatedasanAmericanNationalStandardsCommittee,anotherrevisionincreasingthesizerangetoNPS48andrevisingthetextforclaritywasapprovedandpublishedasANSIB16.9-1971.In1975,SubcommitteeFbeganamajorrevisiontobringthestandarduptodatewithcurrentpracticeandusage.Commonfractionswereexpressedasdecimals(butwithoutintendinghigherprecision)andmetricdimensionalequivalentswereadded.Provisionsforstep-wisechangeofradiusforNPS3⁄4longradiuselbowsand180-degreturnswereintroduced.FollowingStandardsCommittee,cosecretariat,andANSIapproval,therevisionwaspublishedasANSIB16.9-1978.Itwasupdatedbyacorrectiveaddendum,B16.9a-1981,issuedinFebruary1982.In1982,AmericanNationalStandardsCommitteeB16wasreorganizedasanASMECommitteeoperatingunderproceduresaccreditedbyANSI.InASME/ANSIB16.9-1986,thetextwasrevisedandinchdimensionswereestablishedasthestandard.In1991,theSubcommitteereviewedthedocumentandmadeanumberofrevisionsthatwereincludedinASMEB16.9-1993.Dimensionsforshortpatternlapjointswerealsoadded.InASMEB16.9-2001,shortradiuselbowsandreturnswereadded,whichincludedalldimen-sionsandtolerancesofASMEB16.28-1994.MetricunitswereprovidedasanindependentbutparallelalternativestandardtoU.S.CustomaryunitsandaQualitySystemProgramappendixwasadded.In2003,theSubcommitteereviewedthedocumentandmadeanumberofrevisions.Thescopeofthestandardwaschangedtopermitfabricatedlapjointstubendsemployingcircumferentialorintersectionwelds.In2006,theSubcommitteereviewedthedocumentandmadeanumberofadditionsandrevisions.Segmentalelbowrequirementswereaddedaswere3Delbowdimensions.Referencedocumentswereupdated.ThisStandardwasapprovedasanAmericanNationalStandardonMay18,2007.ivASMEB16COMMITTEEStandardizationofValves,Flanges,Fittings,andGaskets(ThefollowingistherosteroftheCommitteeatthetimeofapprovalofthisStandard.)STANDARDSCOMMITTEEOFFICERSH.R.Sonderegger,ChairM.L.Nayyar,ViceChairU.D’Urso,SecretarySTANDARDSCOMMITTEEPERSONNELR.W.Barnes,AnricEnterprises,Inc.W.B.Bedesem,ExxonMobilResearch&EngineeringCo.D.F.Buccicone,ElkhartProducts,Corp.M.A.Clark,Nibco,Inc.U.D’Urso,TheAmericanSocietyofMechanicalEngineersC.E.Floren,MuellerCo.D.R.Frikken,BechtEngineeringCo.M.L.Henderson,ForgitalUSAG.A.Jolly,VogtValves/FlowserveCorp.SUBCOMMITTEEF—STEEL-THREADEDANDWELDEDFITTINGSG.A.Jolly,Chair,VogtValves/FlowserveCorp.G.A.Cuccio,ViceChair,CapitolManufacturingCo.T.Lazar,Secretary,TheAmericanSocietyofMechanicalEngineersA.Appleton,AlloyStainlessProductCo.,Inc.W.J.Birkholz,FlowlineDivision,MarkovitzEnterprises,Inc.K.W.Doughty,ShawAlloyPipingProducts,Inc.J.P.Ellenberger,ConsultantD.R.Frikken,BechtEngineeringCo.vM.Katcher,HaynesInternationalW.N.McLean,NewcoValvesT.A.McMahon,FisherControlsInternational,Inc.M.L.Nayyar,BechtelPowerCorp.J.D.Page,U.S.NuclearRegulatoryCommissionW.H.Patrick,TheDowChemicalCo.R.A.Schmidt,HackneyLadish,Inc.H.R.Sonderegger,AnvilInternational,Inc.W.M.Stephan,FlexitallicLPD.A.Williams,SouthernCo.GenerationR.E.Johnson,ConsultantC.J.Lafferty,PennsylvaniaMachineWorks,Inc.D.H.Monroe,ConsultantR.A.Schmidt,HackneyLadish,Inc.H.R.Sonderegger,AnvilInternational,Inc.J.P.Tucker,FlowserveM.M.Zaidi,JacobsEngineeringCORRESPONDENCEWITHTHEB16COMMITTEEGeneral.ASMEStandardsaredevelopedandmaintainedwiththeintenttorepresenttheconsensusofconcernedinterests.Assuch,usersofthisStandardmayinteractwiththeCommitteebyrequestinginterpretations,proposingrevisions,andattendingCommitteemeetings.Corre-spondenceshouldbeaddressedto:Secretary,B16StandardsCommitteeTheAmericanSocietyofMechanicalEngineersThreeParkAvenueNewYork,NY10016-5990Asanalternative,inquiriesmaybesubmittedviae-mailto:SecretaryB16@asme.org.ProposingRevisions.RevisionsaremadeperiodicallytotheStandardtoincorporatechangesthatappearnecessaryordesirable,asdemonstratedbytheexperiencegainedfromtheapplicationoftheStandard.Approvedrevisionswillbepublishedperiodically.TheCommitteewelcomesproposalsforrevisionstothisStandard.Suchproposalsshouldbeasspecificaspossible,citingtheparagraphnumber(s),theproposedwording,andadetaileddescriptionofthereasonsfortheproposal,includinganypertinentdocumentation.Interpretations.Uponrequest,theB16Committeewillrenderaninterpretationofanyrequire-mentoftheStandard.InterpretationscanonlyberenderedinresponsetoawrittenrequestsenttotheSecretaryoftheB16StandardsCommittee.Therequestforinterpretationshouldbeclearandunambiguous.Itisfurtherrecommendedthattheinquirersubmithis/herrequestinthefollowingformat:Subject:Citetheapplicableparagraphnumber(s)andthetopicoftheinquiry.Edition:CitetheapplicableeditionoftheStandardforwhichtheinterpretationisbeingrequested.Question:Phrasethequestionasarequestforaninterpretationofaspecificrequirementsuitableforgeneralunderstandinganduse,notasarequestforanapprovalofaproprietarydesignorsituation.Theinquirermayalsoincludeanyplansordrawingswhicharenecessarytoexplainthequestion;however,theyshouldnotcontainproprietarynamesorinformation.RequeststhatarenotinthisformatwillberewritteninthisformatbytheCommitteepriortobeinganswered,whichmayinadvertentlychangetheintentoftheoriginalrequest.ASMEproceduresprovideforreconsiderationofanyinterpretationwhenorifadditionalinformationthatmightaffectaninterpretationisavailable.Further,personsaggrievedbyaninterpretationmayappealtothecognizantASMECommitteeorSubcommittee.ASMEdoesnot“approve,”“certify,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.AttendingCommitteeMeetings.TheB16StandardsCommitteeregularlyholdsmeetings,whichareopentothepublic.PersonswishingtoattendanymeetingshouldcontacttheSecretaryoftheB16StandardsCommittee.viASMEB16.9-2007FACTORY-MADEWROUGHTBUTTWELDINGFITTINGS1SCOPE1.1GeneralThisStandardcoversoveralldimensions,tolerances,ratings,testing,andmarkingsforfactory-madewroughtbuttweldingfittingsinsizesNPS1⁄2throughNPS48(DN15throughDN1200).1.2SpecialFittingsFittingsmaybemadetospecialdimensions,sizes,shapes,andtolerancesbyagreementbetweenthemanu-facturerandthepurchaser.1.3FabricatedFittingsFabricatedlateralsandotherfittingsemployingcir-cumferentialorintersectionweldsareconsideredpipefabricationandarenotwithinthescopeofthisStandard.Fabricatedlapjointstubendsareexemptfromtheaboverestrictions,providedtheymeetalltherequire-mentsoftheapplicableASTMmaterialspecificationlistedinsection5.1.4StandardUnitsThevaluesstatedineithermetricorU.S.Customaryunitsaretoberegardedseparatelyasstandard.Withinthetext,theU.S.Customaryunitsareshowninparen-theses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedinde-pendentlyoftheother.CombiningvaluesfromthetwosystemsmayresultinnonconformancewiththisStandard.ThedesignationforsizeisNPSforbothmetric-andcustomary-dimensionedfittings.Fittingpressureratingisassociatedwiththeconnectingwallthicknessofpipeofequivalentsizeandmaterial.1.5References1.5.1ReferencedStandards.Standardsandspecifi-cationsadoptedbyreferenceinthisStandardareshowninMandatoryAppendixII.Itisnotconsideredpracticaltoidentifythespecificeditionofeachstandardandspecificationintheindividualreferences.Instead,thespecificeditionreferenceisidentifiedinMandatoryAppendixII.AproductmadeinconformancewithaprioreditionofreferencedstandardsandinallotherrespectsconformingtothisStandardwillbeconsideredtobeinconformance.11.5.2CodesandRegulations.AfittingusedunderthejurisdictionoftheASMEBoilerandPressureVesselCode,theASMECodeforPressurePiping,oragovern-mentalregulationissubjecttoanylimitationofthatcodeorregulation.Thisincludesanymaximumtemperaturelimitation,orrulegoverningtheuseofamaterialatlowtemperature.1.6ServiceConditionsCriteriaforselectionoffittingtypesandmaterialssuitableforparticularfluidservicearenotwithinthescopeofthisStandard.1.7WeldingInstallationweldingrequirementsareoutsidethescopeofthisStandard.1.8QualitySystemsNonmandatoryrequirementsrelatingtothefittingmanufacturer’sQualitySystemProgramaredescribedinNonmandatoryAppendixA.1.9ConventionForthepurposeofdeterminingconformancewiththisStandard,theconventionforfixingsignificantdigitswherelimits(maximumorminimumvalues)arespeci-fiedshallberoundedoffasdefinedinASTME29.Thisrequiresthatanobservedorcalculatedvalueshallberoundedofftothenearestunitinthelastright-handdigitusedinexpressingthelimit.Decimalvaluesandtolerancesdonotimplyaparticularmethodofmeasurement.1.10PressureRatingDesignationClass,followedbyadimensionlessnumber,isthedesignationforpressure–temperatureratings.Standard-izeddesignationsforflangesperASMEB16.5referencedinthisStandardareClasses150,300,600,900,1500,and2500.2PRESSURERATINGS2.1BasisofRatingsTheallowablepressureratingsforfittingsdesignedinaccordancewiththisStandardmaybecalculatedasforstraightseamlesspipeofequivalentmaterial(asshownbycomparisonofcompositionandmechanicalpropertiesintherespectivematerialspecifications)inASMEB16.9-2007accordancewiththerulesestablishedintheapplicablesectionsofASMEB31,CodeforPressurePiping.Forthecalculation,applicabledataforthepipesize,wallthickness,andmaterialthatisequivalenttothatofthefittingshallbeused.Pipesize,wallthickness(orsched-ulenumber),andmaterialidentityonthefittingsareinlieuofpressureratingmarkings.2.2DesignofFittingsThedesignoffittingsshallbeestablishedbymathe-maticalanalyses(e.g.,ASMEB16.49forbends)containedinnationallyrecognizedpressurevesselorpipingcodes,oratthemanufacturer’soptionbyprooftestinginaccor-dancewithsection9ofthisStandard.Inordertomeetdesignormanufacturingrequirements,itisexpectedthatsomeportionofformedfittingsmayhavetobethickerthanthepipewallwithwhichthefittingisintendedtobeused.The

ASME_B16.9-2007.pdf

ASME_B16.9-2007.pdf

上传者: 123zjf123
113次下载 0人收藏 暂无简介 简介 2010-11-26 举报

简介:asme

Factory-MadeWroughtButtweldingFittingsANAMERICANNATIONALSTANDARDASMEB16.9-2007(RevisionofASMEB16.9-2003)ASMEB16.9-2007(RevisionofASMEB16.9-2003)Factory-MadeWroughtButtweldingFittingsANAMERICANNATIONALSTANDARDThreeParkAvenue•NewYork,NY10016DateofIssuance:December7,2007ThenexteditionofthisStandardisscheduledforpublicationin2012.Therewillbenoaddendaissuedtothisedition.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.InterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesathttp://cstools.asme.orgastheyareissued.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,NY10016-5990Copyright2007byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CONTENTSForeword..............................................................................ivCommitteeRoster.....................................................................vCorrespondenceWiththeB16Committee..............................................vi1Scope.............................................................................12PressureRatings...................................................................13Size...............................................................................24Marking...........................................................................25Material...........................................................................26FittingDimensions.................................................................27SurfaceContours...................................................................38EndPreparation....................................................................39DesignProofTest..................................................................310ProductionTests...................................................................411Tolerances.........................................................................4Figure1MaximumEnvelopeforWeldingEndTransitions..................................18Tables1DimensionsofLongRadiusElbows...............................................52DimensionsofLongRadiusReducingElbows.....................................63DimensionsofLongRadiusReturns..............................................74DimensionsofShortRadiusElbows...............................................75DimensionsofShortRadius180-degReturns......................................86Dimensionsof3DElbows........................................................87DimensionsofStraightTeesandCrosses..........................................98DimensionsofReducingOutletTeesandReducingOutletCrosses.................109DimensionsofLapJointStubEnds...............................................1310DimensionsofCaps..............................................................1411DimensionsofReducers..........................................................1512WeldingBevelsandRootFace....................................................1713Tolerances........................................................................19MandatoryAppendicesIInchTables.......................................................................21IIReferences........................................................................35NonmandatoryAppendixAQualitySystemProgram..........................................................36iiiFOREWORDIn1921,theAmericanEngineeringStandardsCommittee,latertheAmericanStandardsAssocia-tion(ASA),organizedSectionalCommitteeB16tounifyandfurtherdevelopnationalstandardsforpipeflangesandfittings(and,later,forvalves,gaskets,andvalveactuators).CosponsorsoftheB16CommitteewereTheAmericanSocietyofMechanicalEngineers(ASME),theHeatingandPipingContractorsNationalAssociation[nowtheMechanicalContractorsAssociationofAmerica(MCAA)],andtheManufacturersStandardizationSocietyoftheValveandFittingsIndustry(MSS).Cosponsorswerelaterdesignatedascosecretariatorganizations.Standardizationofweldingfittingswasinitiatedin1937byasubgroup(designatedSubgroup6)ofSubcommittee3.Afterconsiderationofseveraldrafts,astandardwasapprovedbytheCommit-tee,cosponsors,andASA,andpublishedwiththedesignationASAB16.9-1940.Revisionsweremadein1950and1955toaddsizesuptoNPS24andtocompletecoverageoffittingsinsomesizes.TheserevisionswereapprovedandpublishedasASAB16.9-1951andASAB16.9-1958.WiththesubgroupnowdesignatedSubcommittee6(laterSubcommitteeF),furtherrevisionswerebeguntoclarifytheintentofthestandard,toaddangularitytolerances,andtoincludefittingsofdifferenttypes(longradiusreducingelbowsandcrosses)andsmallersizes(NPS1⁄4andNPS1⁄2).ThisrevisionwaspublishedasASAB16.9-1964afterASAapproval.AfterreorganizationofASA,firstastheUnitedStatesofAmericaStandardsInstitute(USASI),thenastheAmericanNationalStandardsInstitute(ANSI),withtheSectionalCommitteebeingredesignatedasanAmericanNationalStandardsCommittee,anotherrevisionincreasingthesizerangetoNPS48andrevisingthetextforclaritywasapprovedandpublishedasANSIB16.9-1971.In1975,SubcommitteeFbeganamajorrevisiontobringthestandarduptodatewithcurrentpracticeandusage.Commonfractionswereexpressedasdecimals(butwithoutintendinghigherprecision)andmetricdimensionalequivalentswereadded.Provisionsforstep-wisechangeofradiusforNPS3⁄4longradiuselbowsand180-degreturnswereintroduced.FollowingStandardsCommittee,cosecretariat,andANSIapproval,therevisionwaspublishedasANSIB16.9-1978.Itwasupdatedbyacorrectiveaddendum,B16.9a-1981,issuedinFebruary1982.In1982,AmericanNationalStandardsCommitteeB16wasreorganizedasanASMECommitteeoperatingunderproceduresaccreditedbyANSI.InASME/ANSIB16.9-1986,thetextwasrevisedandinchdimensionswereestablishedasthestandard.In1991,theSubcommitteereviewedthedocumentandmadeanumberofrevisionsthatwereincludedinASMEB16.9-1993.Dimensionsforshortpatternlapjointswerealsoadded.InASMEB16.9-2001,shortradiuselbowsandreturnswereadded,whichincludedalldimen-sionsandtolerancesofASMEB16.28-1994.MetricunitswereprovidedasanindependentbutparallelalternativestandardtoU.S.CustomaryunitsandaQualitySystemProgramappendixwasadded.In2003,theSubcommitteereviewedthedocumentandmadeanumberofrevisions.Thescopeofthestandardwaschangedtopermitfabricatedlapjointstubendsemployingcircumferentialorintersectionwelds.In2006,theSubcommitteereviewedthedocumentandmadeanumberofadditionsandrevisions.Segmentalelbowrequirementswereaddedaswere3Delbowdimensions.Referencedocumentswereupdated.ThisStandardwasapprovedasanAmericanNationalStandardonMay18,2007.ivASMEB16COMMITTEEStandardizationofValves,Flanges,Fittings,andGaskets(ThefollowingistherosteroftheCommitteeatthetimeofapprovalofthisStandard.)STANDARDSCOMMITTEEOFFICERSH.R.Sonderegger,ChairM.L.Nayyar,ViceChairU.D’Urso,SecretarySTANDARDSCOMMITTEEPERSONNELR.W.Barnes,AnricEnterprises,Inc.W.B.Bedesem,ExxonMobilResearch&EngineeringCo.D.F.Buccicone,ElkhartProducts,Corp.M.A.Clark,Nibco,Inc.U.D’Urso,TheAmericanSocietyofMechanicalEngineersC.E.Floren,MuellerCo.D.R.Frikken,BechtEngineeringCo.M.L.Henderson,ForgitalUSAG.A.Jolly,VogtValves/FlowserveCorp.SUBCOMMITTEEF—STEEL-THREADEDANDWELDEDFITTINGSG.A.Jolly,Chair,VogtValves/FlowserveCorp.G.A.Cuccio,ViceChair,CapitolManufacturingCo.T.Lazar,Secretary,TheAmericanSocietyofMechanicalEngineersA.Appleton,AlloyStainlessProductCo.,Inc.W.J.Birkholz,FlowlineDivision,MarkovitzEnterprises,Inc.K.W.Doughty,ShawAlloyPipingProducts,Inc.J.P.Ellenberger,ConsultantD.R.Frikken,BechtEngineeringCo.vM.Katcher,HaynesInternationalW.N.McLean,NewcoValvesT.A.McMahon,FisherControlsInternational,Inc.M.L.Nayyar,BechtelPowerCorp.J.D.Page,U.S.NuclearRegulatoryCommissionW.H.Patrick,TheDowChemicalCo.R.A.Schmidt,HackneyLadish,Inc.H.R.Sonderegger,AnvilInternational,Inc.W.M.Stephan,FlexitallicLPD.A.Williams,SouthernCo.GenerationR.E.Johnson,ConsultantC.J.Lafferty,PennsylvaniaMachineWorks,Inc.D.H.Monroe,ConsultantR.A.Schmidt,HackneyLadish,Inc.H.R.Sonderegger,AnvilInternational,Inc.J.P.Tucker,FlowserveM.M.Zaidi,JacobsEngineeringCORRESPONDENCEWITHTHEB16COMMITTEEGeneral.ASMEStandardsaredevelopedandmaintainedwiththeintenttorepresenttheconsensusofconcernedinterests.Assuch,usersofthisStandardmayinteractwiththeCommitteebyrequestinginterpretations,proposingrevisions,andattendingCommitteemeetings.Corre-spondenceshouldbeaddressedto:Secretary,B16StandardsCommitteeTheAmericanSocietyofMechanicalEngineersThreeParkAvenueNewYork,NY10016-5990Asanalternative,inquiriesmaybesubmittedviae-mailto:SecretaryB16@asme.org.ProposingRevisions.RevisionsaremadeperiodicallytotheStandardtoincorporatechangesthatappearnecessaryordesirable,asdemonstratedbytheexperiencegainedfromtheapplicationoftheStandard.Approvedrevisionswillbepublishedperiodically.TheCommitteewelcomesproposalsforrevisionstothisStandard.Suchproposalsshouldbeasspecificaspossible,citingtheparagraphnumber(s),theproposedwording,andadetaileddescriptionofthereasonsfortheproposal,includinganypertinentdocumentation.Interpretations.Uponrequest,theB16Committeewillrenderaninterpretationofanyrequire-mentoftheStandard.InterpretationscanonlyberenderedinresponsetoawrittenrequestsenttotheSecretaryoftheB16StandardsCommittee.Therequestforinterpretationshouldbeclearandunambiguous.Itisfurtherrecommendedthattheinquirersubmithis/herrequestinthefollowingformat:Subject:Citetheapplicableparagraphnumber(s)andthetopicoftheinquiry.Edition:CitetheapplicableeditionoftheStandardforwhichtheinterpretationisbeingrequested.Question:Phrasethequestionasarequestforaninterpretationofaspecificrequirementsuitableforgeneralunderstandinganduse,notasarequestforanapprovalofaproprietarydesignorsituation.Theinquirermayalsoincludeanyplansordrawingswhicharenecessarytoexplainthequestion;however,theyshouldnotcontainproprietarynamesorinformation.RequeststhatarenotinthisformatwillberewritteninthisformatbytheCommitteepriortobeinganswered,whichmayinadvertentlychangetheintentoftheoriginalrequest.ASMEproceduresprovideforreconsiderationofanyinterpretationwhenorifadditionalinformationthatmightaffectaninterpretationisavailable.Further,personsaggrievedbyaninterpretationmayappealtothecognizantASMECommitteeorSubcommittee.ASMEdoesnot“approve,”“certify,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.AttendingCommitteeMeetings.TheB16StandardsCommitteeregularlyholdsmeetings,whichareopentothepublic.PersonswishingtoattendanymeetingshouldcontacttheSecretaryoftheB16StandardsCommittee.viASMEB16.9-2007FACTORY-MADEWROUGHTBUTTWELDINGFITTINGS1SCOPE1.1GeneralThisStandardcoversoveralldimensions,tolerances,ratings,testing,andmarkingsforfactory-madewroughtbuttweldingfittingsinsizesNPS1⁄2throughNPS48(DN15throughDN1200).1.2SpecialFittingsFittingsmaybemadetospecialdimensions,sizes,shapes,andtolerancesbyagreementbetweenthemanu-facturerandthepurchaser.1.3FabricatedFittingsFabricatedlateralsandotherfittingsemployingcir-cumferentialorintersectionweldsareconsideredpipefabricationandarenotwithinthescopeofthisStandard.Fabricatedlapjointstubendsareexemptfromtheaboverestrictions,providedtheymeetalltherequire-mentsoftheapplicableASTMmaterialspecificationlistedinsection5.1.4StandardUnitsThevaluesstatedineithermetricorU.S.Customaryunitsaretoberegardedseparatelyasstandard.Withinthetext,theU.S.Customaryunitsareshowninparen-theses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedinde-pendentlyoftheother.CombiningvaluesfromthetwosystemsmayresultinnonconformancewiththisStandard.ThedesignationforsizeisNPSforbothmetric-andcustomary-dimensionedfittings.Fittingpressureratingisassociatedwiththeconnectingwallthicknessofpipeofequivalentsizeandmaterial.1.5References1.5.1ReferencedStandards.Standardsandspecifi-cationsadoptedbyreferenceinthisStandardareshowninMandatoryAppendixII.Itisnotconsideredpracticaltoidentifythespecificeditionofeachstandardandspecificationintheindividualreferences.Instead,thespecificeditionreferenceisidentifiedinMandatoryAppendixII.AproductmadeinconformancewithaprioreditionofreferencedstandardsandinallotherrespectsconformingtothisStandardwillbeconsideredtobeinconformance.11.5.2CodesandRegulations.AfittingusedunderthejurisdictionoftheASMEBoilerandPressureVesselCode,theASMECodeforPressurePiping,oragovern-mentalregulationissubjecttoanylimitationofthatcodeorregulation.Thisincludesanymaximumtemperaturelimitation,orrulegoverningtheuseofamaterialatlowtemperature.1.6ServiceConditionsCriteriaforselectionoffittingtypesandmaterialssuitableforparticularfluidservicearenotwithinthescopeofthisStandard.1.7WeldingInstallationweldingrequirementsareoutsidethescopeofthisStandard.1.8QualitySystemsNonmandatoryrequirementsrelatingtothefittingmanufacturer’sQualitySystemProgramaredescribedinNonmandatoryAppendixA.1.9ConventionForthepurposeofdeterminingconformancewiththisStandard,theconventionforfixingsignificantdigitswherelimits(maximumorminimumvalues)arespeci-fiedshallberoundedoffasdefinedinASTME29.Thisrequiresthatanobservedorcalculatedvalueshallberoundedofftothenearestunitinthelastright-handdigitusedinexpressingthelimit.Decimalvaluesandtolerancesdonotimplyaparticularmethodofmeasurement.1.10PressureRatingDesignationClass,followedbyadimensionlessnumber,isthedesignationforpressure–temperatureratings.Standard-izeddesignationsforflangesperASMEB16.5referencedinthisStandardareClasses150,300,600,900,1500,and2500.2PRESSURERATINGS2.1BasisofRatingsTheallowablepressureratingsforfittingsdesignedinaccordancewiththisStandardmaybecalculatedasforstraightseamlesspipeofequivalentmaterial(asshownbycomparisonofcompositionandmechanicalpropertiesintherespectivematerialspecifications)inASMEB16.9-2007accordancewiththerulesestablishedintheapplicablesectionsofASMEB31,CodeforPressurePiping.Forthecalculation,applicabledataforthepipesize,wallthickness,andmaterialthatisequivalenttothatofthefittingshallbeused.Pipesize,wallthickness(orsched-ulenumber),andmaterialidentityonthefittingsareinlieuofpressureratingmarkings.2.2DesignofFittingsThedesignoffittingsshallbeestablishedbymathe-maticalanalyses(e.g.,ASMEB16.49forbends)containedinnationallyrecognizedpressurevesselorpipingcodes,oratthemanufacturer’soptionbyprooftestinginaccor-dancewithsection9ofthisStandard.Inordertomeetdesignormanufacturingrequirements,itisexpectedthatsomeportionofformedfittingsmayhavetobethickerthanthepipewallwithwhichthefittingisintendedtobeused.The
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