sa-192

sa-192SPECIFICATIONFORSEAMLESSCARBONSTEELBOILERTUBESFORHIGH-PRESSURESERVICESA-192/SA-192M(IdenticalwithASTMSpecificationA192/A192M-91)1.Scope1.1Thisspecificationcoversminimum-wallthickness,seamlesscarbonsteelboilerandsuperheatertubesforhigh-pressureservice.1.2Thetubingsizesandthicknessesusuallyfurnishedtothisspecificationare1⁄2in.to7in.[12.7to177.8mm]outsidediameterand0.085to1.000in.[2.2to25.4mm],inclusive,inminimumwallthickness.Tubinghavingotherdimensionsmaybefurnished,providedsuchtubescomplywithallotherrequirementsofthisspecification.1.3Mechanicalpropertyrequirementsdonotapplytotubingsmallerthan1⁄8in[3.2mm]insidediameteror0.015in.[0.4mm]thickness.1.4WhentheseproductsaretobeusedinapplicationsconformingtoISORecommendationsforBoilerCon-struction,therequirementsofSpecificationA520shallsupplementandsupersedetherequirementsofthisspecification.1.5Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedintheorder.2512.ReferencedDocuments2.1ASTMStandards:A450/A450MSpecificationforGeneralRequirementsforCarbon,FerriticAlloy,andAusteniticAlloySteelTubesA520SpecificationforSupplementaryRequirementsforSeamlessandElectric-Resistance-WeldedCarbonSteelTubularProductsforHigh-TemperatureServiceConformingtoISORecommendationsforBoilerCon-struction3.GeneralRequirements3.1MaterialfurnishedunderthisspecificationshallconformtotheapplicablerequirementsofthecurrenteditionofSpecificationA450/A450M,unlessotherwiseprovidedherein.4.OrderingInformation4.1Ordersformaterialunderthisspecificationshouldincludethefollowing,asrequired,todescribedthedesiredmaterialadequately:4.1.1Quantity(feet,metres,ornumberoflengths),4.1.2Nameofmaterial(seamlesstubes),4.1.3Manufacture(hot-finishedorcold-drawn),4.1.4Size(outsidediameterandminimumwallthickness),4.1.5Length(specificorrandom),4.1.6OptionalRequirements(Section8),9898SA-192/SA-192M1998SECTIONII4.1.7Testreportrequired(seesectiononCertifica-tionofSpecificationA450/A450M),4.1.8Specificationdesignation,and4.1.9Specialrequirements.5.Manufacture5.1Tubesshallbemadebytheseamlessprocessandshallbeeitherhot-finishedorcold-finished,asspecified.6.HeatTreatment6.1Hot-finishedtubesneednotbeheattreated.Cold-finishedtubesshallbeheattreatedafterthefinalcold-finishedatatemperatureof1200°F[650°C]orhigher.7.ChemicalComposition7.1Thesteelshallconformtothefollowingrequire-mentsastochemicalcomposition:Carbon,%0.06–0.18Manganese,%0.27–0.63Phosphorus,max0.035Sulfur,max,%0.035Silicon,max,%0.257.2Supplyinganalloygradeofsteelthatspecificallyrequirestheadditionofanyelementotherthanthoselistedin7.1isnotpermitted.8.ProductAnalysis8.1Whenrequestedonthepurchaseorder,aproductanalysisshallbemadebythesupplierfromonetubeper100piecesforsizesover3in.[76.2mm]andonetubeper250piecesforsizes3in.[76.2mm]andunder;orwhentubesareidentifiedbyheat,onetubeperheatshallbeanalyzed.Thechemicalcompositionthusdeterminedshallconformtotherequirementsspecified.8.2Iftheoriginaltestforproductanalysisfails,retestsoftwoadditionalbilletsortubesshallbemade.Bothretests,fortheelementsinquestionshallmeettherequirementsofthespecification;otherwiseallremainingmaterialintheheatorlot(seeNote)shallberejectedor,attheoptionoftheproducer,eachbilletortubemaybeindividuallytestedforacceptance.252Billetsortubeswhichdonotmeettherequirementsofthespecificationshallberejected.NOTE—Alotconsistsof250tubesforsizes3in.[76.2mm]andunderandof100tubesforsizesover3in.[76.2mm],priortocuttingtolength.9.HardnessRequirements9.1Thetubesshallhaveahardnessnumbernotexceedingthefollowing:BrinellHardnessNumberRockwellHardness(Tubes0.200in.[5.1Number(Tubeslessthanmm]andoverinwall0.200in.[5.1mm]inthickness)wallthickness)137HB77HRB10.MechanicalTestsRequired10.1FlatteningTest—Oneflatteningtestshallbemadeonspecimensfromeachoftwotubesselectedfromeachlot(seeNote)orfractionthereof.10.2FlaringTest—Oneflaringtestshallbemadeonspecimensfromeachendoftwotubesselectedfromeachlot(seeNote)orfractionthereof.Thesetubesshallbeselectedapartfromthoseusedfortheflatteningtest.10.3HardnessTest—BrinellorRockwellhardnesstestsshallbemadeonspecimensfromtwotubesfromeachlot.Thetermlotappliestoalltubespriortocutting,ofthesamenominaldiameterandwallthicknesswhichareproducedfromthesameheatofsteel.Whenfinalheattreatmentisinabatch-typefurnace,alotshallincludeonlythosetubesofthesamesizeandthesameheatwhichareheattreatedinthesamefurnacecharge.Whenthefinalheattreatmentisinacontinuousfurnace,alotshallincludealltubesofthesamesizeandheat,heattreatedinthesamefurnaceatthesametemperature,timeatheat,andfurnacespeed.10.4HydrostaticTest—Eachtubeshallbesubjectedtothehydrostaticpressuretest,orinsteadofthistest,anondestructivetestmaybeusedwhenspecifiedbythepurchaser.11.FormingOperations11.1Tubeswheninsertedintheboilershallstandexpandingandbeadingwithoutshowingcracksorflaws.SuperheatertubeswhenproperlymanipulatedshallstandPARTA—FERROUSMATERIALSPECIFICATIONSSA-192/SA-192Mallforging,welding,andbendingoperationsnecessaryforapplicationwithoutdevelopingdefects.12.ProductMarking9812.1InadditiontothemarkingprescribedinSpecifi-cationA450/A450M,themarkingshallindicatewhetherthetubeishotfinishedorcoldfinished.EXPLANATORYNOTENOTE—Forpurposesofdesign,thefollowingtensilepropertiesmaybeassumed:Tensilestrength,min,ksi[MPa]47[325]Yieldstrength,min,ksi[MPa]26[180]Elongationin2in.or50mm,min,%35253