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1、UsedinUSDOE-NEStandardsDesignation:A249/A249M–04StandardSpecificationforWeldedAusteniticSteelBoiler,Superheater,Heat-1Exchanger,andCondenserTubesThisstandardisissuedunderthe®xeddesignationA249/A249M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,th
2、eyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*cation.Theinch-poundunitsshallapplyunlesstheªMº1.1Thisspeci®cation2coversnominal-wall-thicknessdesignationofthisspeci®cationisspeci®edinth
3、eorder.weldedtubesandheavilycoldworkedweldedtubesmadefrom1.7ThefollowingsafetyhazardscaveatpertainsonlytothetheausteniticsteelslistedinTable1,withvariousgradestestmethoddescribedintheSupplementaryRequirementsofintendedforsuchuseasboiler,superheater,heatexchanger,orthisspeci®cation.Thisstandarddoesno
4、tpurporttoaddressallcondensertubes.ofthesafetyconcerns,ifany,associatedwithitsuse.Itisthe1.2GradesTP304H,TP309H,TP309HCb,TP310H,responsibilityoftheuserofthisstandardtoestablishappro-TP310HCb,TP316H,TP321H,TP347H,andTP348Harepriatesafetyandhealthpracticesanddeterminetheapplica-modi®cationsofGradesTP3
5、04,TP309S,TP309Cb,TP310S,bilityofregulatorylimitationspriortouse.Aspeci®cwarningTP310Cb,TP316,TP321,TP347,andTP348,andareintendedstatementisgiveninSupplementaryRequirementS7,Noteforhigh-temperatureservicesuchasforsuperheatersandS7.1.reheaters.2.ReferencedDocuments1.3Thetubingsizesandthicknessesusual
6、lyfurnishedto2.1ASTMStandards:3thisspeci®cationare1¤8in.[3.2mm]ininsidediameterto12in.[304.8mm]inoutsidediameterand0.015to0.320in.[0.4toA262PracticesforDetectingSusceptibilitytoIntergranu-8.1mm],inclusive,inwallthickness.TubinghavingotherlarAttackinAusteniticStainlessSteelsdimensionsmaybefurnished,p
7、rovidedsuchtubescomplyA480/A480MSpeci®cationforGeneralRequirementsforwithallotherrequirementsofthisspeci®cation.Flat-RolledStainlessandHeat-ResistingSteelPlate,1.4Mechanicalpropertyrequirementsdonotap
