ASTMA790

Designation:A790/A790M–08aStandardSpecificationforSeamlessandWeldedFerritic/AusteniticStainlessSteelPipe1ThisstandardisissuedunderthefixeddesignationA790/A790M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecification2coversseamlessandstraight-seamweldedferritic/austeniticsteelpipeintendedforgeneralcorro-siveservice,withparticularemphasisonresistancetostresscorrosioncracking.Thesesteelsaresusceptibletoembrittle-mentifusedforprolongedperiodsatelevatedtemperatures.1.2Optionalsupplementaryrequirementsareprovidedforpipewhenagreaterdegreeoftestingisdesired.Thesesupplementaryrequirementscallforadditionalteststobemadeand,whendesired,oneormoreofthesemaybespecifiedintheorder.1.3AppendixX1ofthisspecificationliststhedimensionsofweldedandseamlessstainlesssteelpipeasshowninANSIB36.19.Pipehavingotherdimensionsmaybefurnishedprovidedsuchpipecomplieswithallotherrequirementsofthisspecification.1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.Theinch-poundunitsshallapplyunlesstheMdesig-nationofthisspecificationisspecifiedintheorder.NOTE1—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisstandardforsuchtraditionaltermsasnominaldiameter,size,andnominalsize.2.ReferencedDocuments2.1ASTMStandards:3A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA923TestMethodsforDetectingDetrimentalIntermetallicPhaseinDuplexAustenitic/FerriticStainlessSteelsA941TerminologyRelatingtoSteel,StainlessSteel,Re-latedAlloys,andFerroalloysA999/A999MSpecificationforGeneralRequirementsforAlloyandStainlessSteelPipeE213PracticeforUltrasonicExaminationofMetalPipeandTubingE309PracticeforEddy-CurrentExaminationofSteelTu-bularProductsUsingMagneticSaturationE381MethodofMacroetchTestingSteelBars,Billets,Blooms,andForgingsE426PracticeforElectromagnetic(Eddy-Current)Exami-nationofSeamlessandWeldedTubularProducts,Austen-iticStainlessSteelandSimilarAlloysE527PracticeforNumberingMetalsandAlloysintheUnifiedNumberingSystem(UNS)2.2ANSIStandards:4B1.20.1PipeThreads,GeneralPurposeB36.10WeldedandSeamlessWroughtSteelPipeB36.19StainlessSteelPipe2.3SAEStandard:5SAEJ10862.4OtherStandard:6SNT-TC-1APersonalQualificationandCertificationinNondestructiveTesting2.5AWSStandardA5.9Corrosion-ResistingChromiumandChromium-NickelSteelWeldingRodsandElectrodes3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisspeci-ficationrefertoTerminologyA941.1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.10onStainlessandAlloySteelTubularProducts.CurrenteditionapprovedOct.1,2008.PublishedNovember2008.Originallyapprovedin1981.Lastpreviouseditionapprovedin2008asA790/A790M–08.2ForASMEBoilerandPressureVesselCodeapplicationsseerelatedSpecifi-cationSA–790inSectionIIofthatCode.3ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.4AvailablefromAmericanNationalStandardsInstitute(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036,(SAE),400CommonwealthDr.,Warrendale,PA15096-0001,(ASNT),P.O.Box28518,1711ArlingateLn.,Columbus,OH43228-0518,*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,[e-mail]4.1Ordersformaterialunderthisspecificationshouldincludethefollowing,asrequired,todescribethedesiredmaterialadequately:4.1.1Quantity(feet,[metres],ornumberoflengths),4.1.2Nameofmaterial(ferritic/austeniticsteelpipe),4.1.3Process(seamlessorwelded),4.1.4Grade(seeTable1),4.1.5Size(NPSdesignatororoutsidediameterandsched-ulenumberofaveragewallthickness),4.1.6Length(specificorrandom)(seeSection11),4.1.7Endfinish(sectiononendsofSpecificationA999/A999M),4.1.8Optionalrequirements(productanalysis,Section9;hydrostatictestornondestructiveelectrictest,Section14),4.1.9Testreportrequired(sectiononcertificationofSpeci-ficationA999/A999M),4.1.10Specificationdesignation,and4.1.11Specialrequirementsandanysupplementaryrequire-mentsselected.5.GeneralRequirements5.1Materialfurnishedunderthisspecificationshallcon-formtotheapplicablerequirementsofthecurrenteditionofSpecificationA999/A999Munlessotherwiseprovidedherein.6.MaterialsandManufacture6.1Manufacture:6.1.1Thepipeshallbemadebytheseamlessoranautomaticweldingprocess,wit