A270-03奥氏体不锈钢管焊接标准

Designation:A270–03aStandardSpecificationforSeamlessandWeldedAusteniticandFerritic/AusteniticStainlessSteelSanitaryTubing1ThisstandardisissuedunderthefixeddesignationA270;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thisspecificationcoversgradesofseamless,welded,andheavilycoldworkedweldedausteniticandferritic/austeniticstainlesssteelsanitarytubingintendedforuseinthedairyandfoodindustryandhavingspecialsurfacefinishes.Pharmaceuticalqualitymayberequested,asasupplementaryrequirement.1.2Thisspecificationcoverstubesinsizesuptoandincluding12in.(304.8mm)inoutsidediameter.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.4Optionalsupplementaryrequirementsareprovided,andwhenoneormoreofthesearedesired,eachshallbesostatedintheorder.2.ReferencedDocuments2.1ASTMStandards:2A262PracticesforDetectingSusceptibilitytoIntergranu-larAttackinAusteniticStainlessSteelsA480/A480MSpecificationforGeneralRequirementsforFlat-RolledStainlessandHeat-ResistingSteelPlate,Sheet,andStripA923TestMethodsforDetectingDetrimentalIntermetallicPhaseinWroughtDuplexAustenitic/FerriticStainlessSteelsA967SpecificationforChemicalPassivationTreatmentsforStainlessSteelPartsA1016/A1016MSpecificationforGeneralRequirementsforFerriticAlloySteel,AusteniticAlloySteel,andStain-lessSteelTubesE527PracticeforNumberingMetalsandAlloys(UNS)2.2ASMEStandard:B46.1SurfaceTexture(SurfaceRoughness,Waviness,andLay)32.3ASMEBoilerandPressureVesselCode:SectionVIIIPressureVessels32.4OtherStandard:SAEJ1086PracticeforNumberingMetalsandAlloys(UNS)43.Terminology3.1Definition:3.1.1roughnessaverage,Ra,n—arithmeticaveragesurfaceroughnessnormallyreportedinmicroinchesormicrons;ameasurementofsurfaceroughnessusuallyperformedbymov-ingastylusinastraightlinealongthesurface,althoughothermethodsmaybeused.4.OrderingInformation4.1Itistheresponsibilityofthepurchasertospecifyallrequirementsthatarenecessaryformaterialorderedunderthisspecification.Suchrequirementsmayinclude,butarenotlimitedto,thefollowing:4.1.1Quantity(feet,metres,ornumberoflengths),4.1.2Nameofmaterial(austeniticsteeltube),4.1.3Processseamless(SML),welded(WLD),orheavilycoldworked(HCW),4.1.4Size(outsidediameterandaveragewallthickness),4.1.5Length(specificorrandom),4.1.6Surfacefinish(Section13),4.1.7Optionalrequirements(productanalysis,seeSection9;hydrostaticornondestructiveelectrictest,seeSection11).4.1.8Testreportrequired(CertificationSectionofSpecifi-cationA1016/A1016M),4.1.9Specificationdesignation,4.1.10Specialrequirements,and1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloys,andisthedirectresponsibilityofSubcommitteeA01.10onStainlessandAlloySteelTubularProducts.CurrenteditionapprovedDec.1,2003.PublishedJanuary2004.Originallyapprovedin1944.Lastpreviouseditionapprovedin2003asA270–03.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3AvailablefromASMEInternational,ThreeParkAvenue,NewYork,NY10016–5990.4AvailablefromSocietyofAutomotiveEngineers(SAE),400CommonwealthDr.,Warrendale,PA15096-0001.1*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.4.2Anysupplementaryrequirements.5.GeneralRequirements5.1Materialfurnishedunderthisspecificationshallcon-formtotheapplicablerequirementsofthecurrenteditionofSpecificationA1016/A1016M,unlessotherwiseprovidedherein.6.Manufacture6.1Thetubesshallbemanufacturedbyoneofthefollowingprocesses:6.1.1Seamless(SML)tubesshallbemadebyaprocessthatdoesnotinvolveweldingatanystage.6.1.2Welded(WLD)tubesshallbemadeusinganauto-matedweldingprocesswithnoadditionoffillermetalduringtheweldingprocess.6.1.3Heavilycoldworked(HCW)tubesshallbemadebyapplyingcoldworkingofnotlessthan35%reductionofthicknessofbothwallandweldtoaweldedtubepriortothefinalanneal.Nofillershallbeusedinmakingtheweld.Priortocoldworking,theweldshallbe100%radiographicallyinspectedinaccordancewiththerequirementsofASMEBoilerandPressureVesselCodeSectionVIII,Division1,latestrevision,ParagraphUW51.6.2Atthemanufacturer’soption,tubingmaybefurnishedeitherhotfinishedorcoldfinished.7.HeatTreatment7.1Allmaterialshallbefurnishedintheheat-treatedcondition.Theheattreatmentprocedure,exceptforS31803,S32003,S32205,S32750,N08926andN08367,shallconsistofheatingthematerialtoaminimumtemperatureof1900°F(1040°C)andquenchinginwaterorrapidcoolingbyothermeans.7.2N08926shallbeheat-treatedtoaminimumtemperatureof2010°F[1100°C]followedbyquenchinginwaterorrapidlycoolingbyothermeans.UNSN08367shouldbesolutionannealedfrom2025°F[1107°C]minimumfollowedbyrapidquenching.7.3S31803andS32205shallbeheat-treatedinatemper