资源描述：
《A420A420M-16 英文版》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Designation:A420/A420M−16StandardSpeciÞcationforPipingFittingsofWroughtCarbonSteelandAlloySteelfor1Low-TemperatureServiceThisstandardisissuedunderthefixeddesignationA420/A420M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofr
2、evision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.31.Scope*2.2ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTesting1.1Thisspecificationcoverswro
3、ughtcarbonsteelandofSteelProductsalloysteelfittingsofseamlessandweldedconstruction,cov-A960/A960MSpecificationforCommonRequirementsforeredbythelatestrevisionofASMEB16.9,ASMEB16.11,WroughtSteelPipingFittingsMSSSP-79,MSSSP-83,MSSSP-95,andMSSSP-97.A1058TestMethodsforMecha
4、nicalTestingofSteelFittingsdifferingfromtheseASMEandMSSstandardsshallProducts—MetricbefurnishedinaccordancewithSupplementaryRequirement2.3ASMEStandards:S58ofSpecificationA960/A960M.ThesefittingsareforuseinB16.9Factory-MadeWroughtSteelButt-WeldingFittings4pressurepiping
5、andpressurevesselserviceatlowtempera-B16.11ForgedSteelFittings,Socket-WeldingThreaded4tures.SectionVIIIDivision1,PressureVessels41.2OptionalsupplementaryrequirementsareprovidedforSectionIX2.4MSSStandards:fittingswhereagreaterdegreeofexaminationisdesired.WhenMSSSP-25St
6、andardMarkingSystemforValves,Fittings,desired,oneormoreofthesesupplementaryrequirementsshall5Flanges,andUnionsbespecifiedintheorder.5MSSSP-79SocketWeldingReducerInserts1.3Thisspecificationisexpressedinbothinch-poundunitsMSSSP-83SteelPipeUnions,Socket-WeldingandandinSIu
7、nits.However,unlesstheorderspecifiesthe5Threaded5applicable“M”specificationdesignation(SIunits),themate-MSSSP-95Swage(d)NipplesandBullPlugsrialshallbefurnishedtoinch-poundunits.MSSSP-97IntegrallyReinforcedForgedBranchOutletFittings—SocketWelding,ThreadedandButtwelding1
8、.4ThevaluesstatedineitherSIunitsorinch-poundunitsEndsaretoberegardedseparatelyasstandard.Withinthetext,the2.5ASNTStandards:SIunitsa
