ASME SA420SA420M-2017 英文版

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1、ASMEBPVC.II.A-2017SA-420/SA-420MSPECIFICATIONFORPIPINGFITTINGSOFWROUGHTCARBONSTEELANDALLOYSTEELFORLOW-TEMPERATURESERVICESA-420/SA-420M(IdenticalwithASTMSpecificationA420/A420M-04.)707SA-420/SA-420MASMEBPVC.II.A-2017SPECIFICATIONFORPIPINGFITTINGSOFWROUGHTCARBONSTEELANDALLOYSTEELFOR

2、LOW-TEMPERATURESERVICESA-420/SA-420M(IdenticalwithASTMSpecificationA420/A420M-04)1.Scope2.3ASMEStandards:1.1ThisspecificationcoverswroughtcarbonsteelandB16.9Factory-MadeWroughtSteelButt-WeldingFittingsalloysteelfittingsofseamlessandweldedconstruction,B16.11ForgedSteelFittings,Socket-

3、WeldingThreadedcoveredbythelatestrevisionofASMEB16.9,ASMESectionVIIIDivision1,PressureVesselsB16.11,MSS-SP-79,andMSSSP-95.Fittingsdiffering2.4MSSStandards:fromtheseASMEandMSSVFstandardsshallbefurnishedMSSSP-25StandardMarkingSystemforValves,Fittings,inaccordancewithSupplementaryReq

4、uirementS58ofFlanges,andUnionsSpecificationA960.ThesefittingsareforuseinpressureMSSSP-79SocketWeldingReducerInsertspipingandpressurevesselserviceatlowtemperatures.MSSSP-95Swage(d)NipplesandBullPlugs1.2Optionalsupplementaryrequirementsareprovided2.5ASNTStandard:forfittingswhereagreate

5、rdegreeofexaminationisdesired.ASNT(1984)RecommendedPracticeNo.SNT-TC-1AWhendesired,oneormoreofthesesupplementaryrequire-mentsshallbespecifiedintheorder.3.OrderingInformation1.3Thisspecificationisexpressedinbothinch-pound3.1SeeSpecificationA960.unitsandinSIunits.However,unlesstheorder

6、specifiestheapplicable“M”specificationdesignation(SIunits),thematerialshallbefurnishedtoinch-poundunits.4.GeneralRequirements1.4Thevaluesstatedineitherinch-poundunitsorSI4.1Productfurnishedtothisspecificationshallconformunitsaretoberegardedseparatelyasstandard.Withinthetotherequireme

7、ntsofSpecificationA960,includinganytext,theSIunitsareshowninbrackets.Thevaluesstatedsupplementaryrequirementsthatareindicatedinthepur-ineachsystemarenotexactequivalents;therefore,eachchaseorder.Failuretocomplywiththegeneralrequire-systemmustbeusedindependentlyoftheother.mentsofSpec

8、ificationA960constitutesnon-confor