API SPEC 2SC 1ST ED (R 2025) Manufacture of Structural Steel Castings for Primary Offshore Applications; First Edition; Effectiv.docx

1、ManufactureofStructuralSteelCastingsforPrimaryOffshoreApplicationsAPISPECIFICATION2SCFIRSTEDITION,SEPTEMBER2009EFFECTIVEDATE:MARCH1,2010REAFFIRMED,JUNE2025AmerieanPetroleumInstituteManufactureofStructuralSteelCastingsforPrimaryOffshoreApplicationsUpstreamSegmentAPISPECIFICATION2SCFIRSTEDITION,SEPTEM

2、BER2009EFFECTIVEDATE:MARCH152010REAFFIRMED,JUNE2025ARAmericanPetroleunnInstituteSpecialNotesAPIpublicationsnecessarilyaddressproblemsofageneralnature.Withrespecttoparticularcircumstances,local,state,andfederallawsandregulationsshouldbereviewed.NeitherAPInoranyofAPIsemployees,subcontractors,consultan

3、ts,committees,orotherassigneesmakeanywarrantyorrepresentation,eitherexpressorimplied,withrespecttotheaccuracy,completeness,orusefulnessoftheinformationcontainedherein,orassumeanyliabilityorresponsibilityforanyuse,ortheresultsofsuchuse,ofanyinformationorprocessdisclosedinthispublication.NeitherAPInor

4、anyofAPIsemployees,subcontractors,consultants,orotherassigneesrepresentthatuseofthispublicationwouldnotinfringeuponprivatelyownedrights.APIpublicationsmaybeusedbyanyonedesiringtodoso.EveryefforthasbeenmadebytheInstitutetoassuretheaccuracyandreliabilityofthedatacontainedinthem;however,theInstitutemak

5、esnorepresentation,warranty,orguaranteeinconnectionwiththispublicationandherebyexpresslydisclaimsanyliabilityorresponsibilityforlossordamageresultingfromitsuseorfortheviolationofanyauthoritieshavingjurisdictionwithwhichthispublicationmayconflict.APIpublicationsarepublishedtofacilitatethebroadavailab

6、ilityofproven,soundengineeringandoperatingpractices.Thesepublicationsarenotintendedtoobviatetheneedforapplyingsoundengineeringjudgmentregardingwhenandwherethesepublicationsshouldbeutilized.TheformulationandpublicationofAPIpublicationsisnotintendedinanywaytoinhibitanyonefromusinganyotherpractices.Any

7、manufacturermarkingequipmentormaterialsinconformancewiththemarkingrequirementsofanAPIstandardissolelyresponsibleforcomplyingwithalltheapplicablerequirementsofthatstandard.APIdoesnotrepresent,warrant,orguaranteethatsuchproductsdoinfactconformtotheapplicableAPIstandard.Allrightsreserved.Nopartofthiswo

8、rkmaybereproduced,translated,storedinaretrievalsystem,ortransmittedbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutpriorwrittenpermissionfromthepublisher.ContactthePublisher,APIPublishingServices,200MassachusettsAvenue,NW,Suite1100,Washington,DC20001.Copyright2009AmericanP

9、etroleumInstituteForewordThisspecificationisbasedontheexperienceacquiredduringthedesign,construction,operationandmaintenanceofoffshoreprocessingunitsandpermanentfacilities,assupplementedwiththeexperienceofoperatingcompanieswithtopsides,fixedplatforms,floatingstructures(e.g.TLPs3spars,andthelike),and

10、theirtendonsandrisers.Castingsintheseapplicationstendtobelimitedproductioncomponents,withrelativelyfewreplications,andreceivemoreintensescrutinythanroutinemassproductionruns.Whereappropriate,thisspecificationisbasedon,orreferenceismadeto,international,regional,nationalandindustrystandards.Thisisaman

11、ufacturingspecificationforthecastingitself.Itisanticipatedthatgeometricdesignforbothservicerequirementsandcastingfeasibilitywillhavebeenagreedcollectivelybetweenthecontractor,manufacturer,andpurchaserbeforethisspecificationisinvoked.Attendantissuesregardingsystemreliability,geometricdesign,incorpora

12、tionintotheoverallconstruction,operation,andmaintenancearenotaddressedhere.Thoseelectingtousethisspecificationasareferencefortheirneededlevelofperformancequalityshouldcarefullyconsideralltheseattendantissues.Whencontractorsormaufacturerssuppliersusethisspecificationtheyshouldbesolelyresponsibleforth

13、equalityofworkandtheattainmentoftherequireddesignandengineeringstandards.Inparticular,forthoserequirementsnotspecificallycovered,thepurchaserwillexpectthemtofollowthosedesignandengineeringpracticeswhichwillachievethesamelevelofintegrityasreflectedintheirbestproduction.Ifindoubt,thecontractorormanufa

14、cturer/suppliershould,withoutdetractingfromhisownresponsibility,consultthepurchaseroritstechnicaladvisor.Thepurchasermaythennegotiatewiththeauthoritiesconcernedwiththeobjectofobtainingagreementtofollowthisspecificationascloselyaspossible.NothingcontainedinanyAPIpublicationistobeconstruedasgrantingan

15、yright,byimplicationorotherwise,forthemanufacture,sale,oruseofanymethod,apparatus,orproductcoveredbyletterspatent.Neithershouldanythingcontainedinthepublicationbeconstruedasinsuringanyoneagainstliabilityforinfringementofletterspatent.ThisdocumentwasproducedunderAPIstandardizationproceduresthatensure

16、appropriatenotificationandparticipationinthedevelopmentalprocessandisdesignatedasanAPIstandard.QuestionsconcerningtheinterpretationofthecontentofthispublicationorcommentsandquestionsconcerningtheproceduresunderwhichthispublicationwasdevelopedshouldbedirectedinwritingtotheDirectorofStandards3American

17、PetroleumInstitute5200MassachusettsAvenue5NW3Suite1100,Washington5DC20001.Requestsforpermissiontoreproduceortranslatealloranypartofthematerialpublishedhereinshouldalsobeaddressedtothedirector.Generally,APIstandardsarereviewedandrevised,reaffirmed,orwithdrawnatleasteveryfiveyears.Aone-timeextensionof

18、uptotwoyearsmaybeaddedtothisreviewcycle.StatusofthepublicationcanbeascertainedfromtheAPIStandardsDepartment5telephone(202)682-8000.AcatalogofAPIpublicationsandmaterialsispublishedannuallybyAPI,200MassachusettsAvenue3NW3Suite1100,Washington,DC20001.Suggestedrevisionsareinvitedandshouldbesubmittedtoth

19、eStandardsDepartment,API,200MassachusettsAvenue,NW3Suite1100,Washington3DC20001,standardsapi.org.Contents444555567Page1 Scope12 NormativeReferences13 Terms,Definitions,andAcronyms23.1 TermandDefinitions23.2 Acronyms34 QualityRequirements,QualityPlan(QP)5andManufacturingProcedureSpecification(MPS)44.

20、1 ProcurementSpecification4.2 LowestAnticipatedServiceTemperature(LAST)4.3 ServiceCategories4.4 CriticalSections4.5 UnderlyingIndustryStandardSpecification4.6 Traceability4.7 InformationtobeSuppliedtotheCastingManufacturer4.8 DocumentRequiringApprovalbythePurchaserandContractor4.9 PreproductionMeeti

21、ng4.10 Post-jobProductionHistogramsProcessofManufactureandChemicalComposition5.2ChemicalComposition6 HeatTreatment6.1 HeatTreatmentProcessControlRequirements6.2 Quenching6.3 Heat-treatmentFurnaceRecordsorCharts,TemperaturesandCycleTimes7 QualificationTestSample(QTS)7.1 CastingsRepresentedbyQTS7.2 QT

22、SDimensionalRequirements7.3 QTSHeatTreatment7.4 PartialSeveringofQualityTestSamples8 MechanicalPropertiesandTests8.1 TensileTests8.2 HardnessTests8.3 CharpyV-notchImpactTests(CVNTests)8.4 Drop-weightorPelliniTest(DWT)9 RepairWeldingofCastings9.1 ApprovalofRepairWeldingWPSsandPQRsandCodeCompliance9.2

23、 AllowableWeldingProcesses9.3 PWHTofMajorWeldRepairs9.4 Identification9.5 RecordsofWelderandWeldingOperatorQualificationTestResults9.6 WeldingConsumables9.7 WeldingProcedureSpecification(WPS)9.8 RepairWeldProcedureQualificationRequirements9.9 RepairWeldWorkmanshipandTechniquePage9.10 NDTofRepairWeld

24、sMadeDuringProduction209.11 RepairWeldChartsandMaximumAllowableRepairWeldVolumeandSurfaceArea2112345oo.o.o.o.o.NDTofCastings21General21VTofCastings21NDTofCastingsforSurfaceDefects22NDTofCastingsforSubsurfaceIndications23DocumentationofNDTresults2411DimensionalInspection24AnnexA(informative)UseoftheA

25、PIMonogrambyLicensees26Bibliography29123456TablesDocumentSubmittalsRequiringApprovalbythePurchase6ElementalLimits8TensilePropertiesandHardnessRequirements11CVNAbsorbedEnergyRequirementsSCAandSCB13CVNAbsorbedEnergyRequirements-SCC13TestLocationsforCVNSpecimens18IntroductionThisspecificationdefinesthe

26、minimumrequirementsformanufacture,testing,andinspectionofcarbonandlow-alloysteelcastingsGrades345to586Nmm2(50ksito85ksi)foruseinprimarysteelapplicationsinthefabricationofoffshorestructures,manufactureofmarinemechanical,orriser,tendon,orotherequipmentintendedforapplicationonpermanentoffshorestructure

27、s,orforcomponentsthereof.Servicecategories(A,B,andC),asdefinedin4.4,reflectcastinggeometryandmethodofincorporationintotheoverallsystem.Theymayalsobedesignatedbytheuser(purchaser)toreflectmoderatelydifferentbutstandardizedlevelsofperformance.VllManufactureofStructuralSteelCastingsforPrimaryOffshoreAp

28、plications1 ScopeCastingsmanufacturedtothisspecificationareintendedforuseinthefabricationofoffshorestructures,manufactureofcriticalmarineormechanicalorothersystemcomponentsintendedforapplicationonpermanentoffshorestructures,orforcomponentsusedintheconstructionofoffshoretendons,risersandpipelines.Ifn

29、ationaland/orlocalregulationsexistinwhichsomeoftherequirementsmaybemorestringentthaninthisspecificationthecontractorshalldeterminewhichoftherequirementsaremorestringentandwhichcombinationofrequirementswillbeacceptablewithrespecttosafety,environmental,economic,andlegalaspects.Inallcases,thecontractor

30、shallinformthepurchaserofanydeviationfromtherequirementsofthisspecificationwhichisconsideredtobenecessaryinordertocomplywithnationaland/orlocalregulations.2 NormativeReferencesThefollowingreferenceddocumentsareindispensableintheapplicationofthisstandard.Fordatedreferences,onlytheeditioncitedapplies.

31、Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ASMEBoilerandPressureVesselCode(BPVC)ASMEInternational,3ParkAvenue,NewYork,NewYork10016-5990,www.asme.org.5SectionV:NondestructiveExamination;SectionVIII:PressureVessels;SectionIX:WeldingandBrazingQualificati

32、onsASNTSNT-TC-IAAmericanSocietyforNondestructiveTesting,1711ArlingateLane,P.O.Box28518,Columbus,Ohio43228,RecommendedPractice,PersonnelQualificationandCertificationinNondestructiveTestingASTMA609:1991www.asnt.org.3ASTMInternational,100BarrHarborDrive,WestConshohocken,Pennsylvania19428,www.astm.org.,

33、StandardPracticeforCastings,Carbon,Low-Alloy,andMartensiticStainlessSteel,UltrasonicExaminationThereofASTMA703:2008,StandardSpecificationforSteelCastings,GeneralRequirements,forPressure-ContainingPartsASTME10,StandardTestMethodforBrinellHardnessofMetallicMaterialsASTME23,StandardTestMethodsforNotche

34、dBarImpactTestingofMetallicMaterialsASTME92,StandardTestMethodforVickersHardnessofMetallicMaterialsASTME110,StandardTestMethodforIndentationHardnessofMetallicMaterialsbyPortableHardnessTestersAWSA4.3AmericanWeldingSociety,550NWLeJeuneRoad,Miami,Florida33126,www.aws.org.,StandardMethodsforDeterminati

35、onoftheDiffusibleHydrogenContentofMartensitic,Bainitic,andFerriticSteelWeldMetalProducedbyArcWeldingAWSA5.01,FillerMetalProcurementGuidelinesAWSD1.1:2008,StructuralWeldingCode-SteelBSIBS2M54BritishStandardsInstitution,ChiswickHighRoad,London,W44AL,UnitedKingdom,www.bsi-.,SpecificationforTemperatureC

36、ontrolintheHeatTreatmentofMetalsBSIBS7363,MethodsforBead-on-plate(BOP)TestforWeldsBSIBSEN1043-13DestructiveTestsOnWeldsInMetallicMaterialsHardnessTestingPart1:HardnessTestonArcWeldedJointsISO3690InternationalOrganizationforStandardization,13ch.deIaVoie-Creuse,Casepostale56,CH-12113Geneva20,Switzerla

37、nd,www.iso.org.,WeldingandalliedProcesses-DeterminationofhydrogencontentinferriticsteelarcweldmetalISO6507-13MetallicmaterialsVickershardnesstestPart1:TestmethodISO10474,SteelandsteelproductsInspectiondocumentsMIL-STD-1684U.S.DepartmentofDefense,DocumentAutomationandProductionService,Building4D,700R

38、obbinsAvenue,Philadelphia,Pennsylvania19111-5094,http:/assist.daps.dla.mil.,ControlofHeatTreatmentMSSSP-53ManufacturersStandardizationSocietyoftheValveandFittingsIndustry,lnc.3127ParkStreet,N.E.,Vienna,Virginia22180-4602,www.mss-.,QualityStandardforSteelCastingsandForgingsforValves,FlangesandFitting

39、sandOtherPipingComponents-MagneticParticleExaminationMethodMSSSP-54,QualityStandardforSteelCastingsforValves,FlangesandFittingsandOtherPipingComponentsFladiographicExaminationMethodMSSSP-55,QualityStandardforSteelCastingsforValves,Flanges,FittingsandOtherPipingComponentsVisualMethodforEvaluationofSu

40、rfaceIrregularities3 Terms,Definitions,andAcronyms3.1 TermandDefinitionsForpurposesofthisdocument,thefollowingtermsanddefinitionsapply.3.1.1contractorThepartythatcarriesoutallorpartofthedesign,engineering,procurement,construction,commissioningormanagementofaprojectoroperationofafacility.NOTEThepurch

41、asermayundertakeallorpartofthedutiesofthecontractor.3.1.2criticalregionforNDTAsdefinedorapprovedbythepurchaserincontractdocumentsordrawings,whereadditionalormorestringentrequirementsareneededbasedondesignconsiderations.3.1.3criticalsectionformechanicalpropertiesAsdefinedorapprovedbythepurchaserincon

42、tractdocumentsordrawings,andusedtodetermineeffectivecastingthickness.3.1.4gradeMinimumyieldstrengthinNmm2.3.1.5majorweldrepairRepairweldwhosedepthofthecavityrequiredforweldingexceeds20%oftheactualwallthicknessor25mm(1in.),whicheverissmaller;orweldrepairsforwhichtheareaofthecavityrequiredforweldingex

43、ceedsapproximately65cm2(10in.2).3.1.6manufacturerThepartythatmanufacturescomponents,materials,equipmentandservicestoperformthedutiesspecifiedbythecontractor.3.1.7 purchaserThepartythatacquiresthecomponents.NOTEThepurchaserW川specifythetechnicalrequirements.Thepurchasermayutilizeanagentorconsultanttoa

44、ctfor,andonbehalfof,thepurchaser.3.1.8qualityheattreatmentQHTThecollectivesequenceofheattreatmentsperformedtoachievefinalproperties.3.2 AcronymsAFCAODAr3coolingBBOPCcastingCEVCVNDWTFCAWprocessGTAWapprovedforconstructionargonoxygendecarburizationthetemperatureatwhichaustenitebeginstotransformtoferrit

45、eduringsteeldesignationsuffixindicating“primarysteelbeadonplatesteeldesignationprefixindicatingthecomponentisacarbonequivalentvalueCharpyV-notchimpacttestdrop-weightorPellinitestflux-coredarcweldinggastungstenarcweldingprocessHAZweldheat-affectedzoneLASTlowestanticipatedservicetemperatureMPSmanufact

46、uringprocedurespecificationMTmagneticparticleexaminationMTRmaterialtestreport,orITI川certificateNCRnonconformanceNDTPcmPQRrecordPQTPTnondestructivetestingcompositionparameterweldingprocedurequalificationweldprocedurequalificationtestliquiddyepenetrantexaminationPWHTpostweldheattreatmentQPqualityplanQ

47、HTqualityheattreatmentQTSqualificationtestsampleRTradiographicexaminationSCAServiceCategoryA(see4.4.1)SCBServiceCategoryBSCCSMAWprocessUTVDVTWPSServiceCategoryCshieldedmetalarcweldingultrasonicexaminationvacuumdegassingvisualexaminationweldingprocedurespecification4 QualityRequirements5QualityPlan(Q

48、P)5andManufacturingProcedureSpecification(MPS)4JGeneralThecastingproducershallsubmitaQPandMPStothepurchaserforapproval,priortocommencementofproduction.ThequalitymanagementsystemshallincludeInspectionandtestrequirementsandprovideverificationofthird-partyinspectionapprovalsatholdpoints.4.1 ProcurementSpecificationThisspecif