Designation:A403/A403M–02AnAmericanNationalStandardStandardSpecificationforWroughtAusteniticStainlessSteelPipingFittings1ThisstandardisissuedunderthefixeddesignationA403/A403M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoverswroughtstainlesssteelfittingsforpressurepipingapplications.21.2SeveralgradesofausteniticstainlesssteelalloysareincludedinthisspecificationGradesaredesignatedwithaprefix,WPorCR,basedontheapplicableASMEorMSSdimensionalandratingstandards,respectively.1.3ForeachoftheWPstainlessgrades,severalclassesoffittingsarecovered,toindicatewhetherseamlessorweldedconstructionwasutilized.Classdesignationsarealsoutilizedtoindicatethenondestructivetestmethodandextentofnondestructiveexamination(NDE).Table1isageneralsummaryofthefittingclassesapplicabletoallWPgradesofstainlesssteelcoveredbythisspecification.TherearenoclassesfortheCRgrades.Specificrequirementsarecoveredelsewhere.1.4Thisspecificationisexpressedinbothinch-poundunitsandinSIunits.However,unlesstheorderspecifiestheapplicable“M”specificationdesignation(SIunits),themate-rialshallbefurnishedtoinch-poundunits.1.5Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.1.6Thisspecificationdoesnotapplytocaststeelfittings.AusteniticstainlesssteelcastingsarecoveredinSpecificationsA351/A351M,A743/A743M,andA744/A744M.2.ReferencedDocuments2.1ASTMStandards:A262PracticesforDetectingSusceptibilitytoIntergranu-larAttackinAusteniticStainlessSteels3A351/A351MSpecificat...
