A179(熱交換和冷凝器用無(wú)縫冷拔低碳鋼管)

1、Designation:A179/A179M90a(Reapproved2005)UsedinUSNRC-RDTStandardsStandardSpecicationforSeamlessCold-DrawnLow-CarbonSteelHeat-ExchangerandCondenserTubes1ThisstandardisissuedunderthexeddesignationA179/A179M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevi

2、sion,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecication2coversminimum-wall-thickness,seamlesscold-drawnlow-carbonsteeltubesfortubularheatexchangers,condensers,andsimilar

3、heattransferapparatus.1.2Thisspecicationcoverstubes18to3in.3.2to76.2mm,inclusive,inoutsidediameter.NOTE1Tubingsmallerinoutsidediameterandhavingathinnerwallthanindicatedinthisspecicationisavailable.Mechanicalpropertyrequirementsdonotapplytotubingsmallerthan18in.3.2mminoutsidediameterorwithawallthickn

4、essunder0.015in.0.4mm.3.1.4Size(outsidediameterandminimumwallthickness),3.1.5Length(specicorrandom),3.1.6Optionalrequirements(productanalysis,Section9,angetest,11.3),3.1.7Testreportrequired(CerticationSectionofSpeci-cationA450/A450M),3.1.8Specicationnumber,and3.1.9Specialrequirements.4.GeneralRequir

5、ements4.1Materialfurnishedunderthisspecicationshallcon-formtotheapplicablerequirementsofthecurrenteditionofSpecicationA450/A450M,unlessotherwiseprovidedherein.5.Manufacture5.1Tubesshallbemadebytheseamlessprocessandshallbecolddrawn.6.HeatTreatment6.1Tubesshallbeheattreatedafterthenalcolddrawpassatate

6、mperatureof1200°F650°Corhigher.7.SurfaceCondition7.1Finishedtubesshallbefreeofscale.Aslightamountofoxidationwillnotbeconsideredasscale.8.ChemicalComposition8.1Thesteelshallconformtothefollowingrequirementsastochemicalcomposition:Carbon,%Manganese,%Phosphorus,max,%Sulfur,max,%0.060.180.270.

7、630.0350.0351.3Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconforman

8、cewiththespeci-cation.Theinch-poundunitsshallapplyunlessthe“M”designationofthisspecicationisspeciedintheorder.2.ReferencedDocuments2.1ASTMStandards:3A450/A450MSpecicationforGeneralRequirementsforCarbon,FerriticAlloy,andAusteniticAlloySteelTubes3.OrderingInformation3.1Ordersformaterialunderthisspecic

9、ationshouldincludethefollowing,asrequired,todescribethedesiredmaterialadequately:3.1.1Quantity(feet,metres,ornumberoflengths),3.1.2Nameofmaterial(seamlesstubes),3.1.3Manufacture(cold-drawn),ThisspecicationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteel,andRelatedAlloysandisthedirectre

10、sponsibilityofSubcommitteeA01.09onCarbonSteelTubularProducts.CurrenteditionapprovedOct.1,2005.PublishedOctober2005.Originallyapprovedin1935.Lastpreviouseditionapprovedin2001asA179/A179M90a(2001).2ForASMEBoilerandPressureVesselCodeapplicationsseerelatedSpeci-cationSA-179inSectionIIofthatCode.3Forrefe

11、rencedASTMstandards,visittheASTMwebsite,,orcontactASTMCustomerS.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandardsDocumentSummarypageontheASTMwebsite.8.2Supplyinganalloygradethatspecicallyrequirestheadditionofanyelementotherthanthoselistedin8.1isnotp

12、ermitted.9.ProductAnalysis9.1Whenrequestedonthepurchaseorder,aproductanaly-sisshallbemadebythesupplierfrom1tubeper250piecesorwhentubesareidentiedbyheat,onetubeperheatshallbeCopyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.A179/A179M90a(2005)ana

13、lyzed.Thechemicalcompositionthusdeterminedshallconformtotherequirementsspecied.9.2Iftheoriginaltestforproductanalysisfails,retestsoftwoadditionalbilletsortubesshallbemade.Bothretests,fortheelementsinquestion,shallmeettherequirementsofthespecication;otherwiseallremainingmaterialintheheatorlot(Note2)s

14、hallberejectedor,attheoptionoftheproducer,eachbilletortubemaybeindividuallytestedforacceptance.Billetsortubeswhichdonotmeettherequirementsofthespecica-tionshallberejected.NOTE2Alotconsistsof250tubes.10.HardnessRequirements10.1Thetubesshallhaveahardnessnumbernotexceeding72HRB.11.MechanicalTestsRequir

15、ed11.1FlatteningTestOneatteningtestshallbemadeonspecimensfromeachoftwotubesfromeachlot(Note2)orfractionthereof.11.2FlaringTestOnearingtestshallbemadeonspeci-mensfromeachoftwotubesfromeachlot(Note2)orfractionthereof.11.3FlangeTestWhenspeciedasasubstituteforthearingtest,fortubeshavingawallthickness(ac

16、tualmeanwall)lessthan10%oftheoutsidediameter,onetestshallbemadeonspecimensfromeachoftwotubesfromeachlot(Note2)orfractionthereof.Fortubesotherthanspeciedabove,theangetestshallnotberequired.11.4HardnessTestRockwellhardnesstestsshallbemadeonspecimensfromtwotubesfromeachlot.Thetermlotappliestoalltubes,p

17、riortocutting,ofthesamenominaldiameterandwallthicknesswhichareproducedfromthesameheatofsteel.Whennalheattreatmentisinabatch-typefurnace,alotshallincludeonlythosetubesofthesamesizeandthesameheatwhichareheattreatedinthesamefurnacecharge.Whenthenalheattreatmentisinacontinuousfurnace,alotshallincludeall

18、tubesofthesamesizeandheat,heattreatedinthesamefurnaceatthesametemperature,timeatheat,andfurnacespeed.11.5HydrostaticTestEachtubeshallbesubjectedtothehydrostatictest,or,insteadofthistest,anondestructiveelectrictestmaybeusedwhenspeciedbythepurchaser.12.ProductMarking12.1Inadditiontothemarkingprescribe

19、dinSpecicationA450/A450M,themarkingshallincludethenameandordernumberofthepurchaser.13.Keywords13.1colddrawntube;condensertubes;heatexchangertubes;lowcarbonsteel;seamlesstubeEXPLANATORYNOTESNOTE1Forpurposesofdesign,thefollowingtensilepropertiesmaybeassumed:Tensilestrength,min,ksiMPaYieldstrength,min,

20、ksiMPaElongationin2in.or50mm,min,%473252618035ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryveyearsandifnotrevised,eitherreapprovedorwithdrawn.Yourc