ASTM A350-18 英文版

《ASTM A350-18 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、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TB

2、T)Committee.Designation:A350/A350M−18StandardSpeciÞcationforCarbonandLow-AlloySteelForgings,RequiringNotch1ToughnessTestingforPipingComponentsThisstandardisissuedunderthefixeddesignationA350/A350M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginalad

3、optionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*De

4、velopmentofInternationalStandards,GuidesandRecom-2mendationsissuedbytheWorldTradeOrganizationTechnical1.1ThisspecificationcoversseveralgradesofcarbonandBarrierstoTrade(TBT)Committee.low-alloysteelforgedorring-rolledflanges,forgedfittingsandvalvesintendedprimarilyforlow-

5、temperatureserviceand2.ReferencedDocumentsrequiringnotchtoughnesstesting.Theyaremadetospecified3dimensions,ortodimensionalstandards,suchastheASME2.1ASTMStandards:andAPISpecificationsreferencedinSection2.AlthoughthisA788/A788MSpecificationforSteelForgings,GeneralRe-speci

6、ficationcoverssomepipingcomponentsmachinedfromquirementsrolledbarandseamlesstubularmaterials(see5.3.3),itdoesnotA961/A961MSpecificationforCommonRequirementsforcoverrawmaterialproducedintheseproductforms.SteelFlanges,ForgedFittings,Valves,andPartsforPipingApplications1.

7、2Nolimitationonsizeisintendedbeyondtheabilityof2.2ASMEStandards:themanufacturertoobtainthespecifiedrequirements.4B16.5SteelPipeFlangesandFlangedFittingsHowever,Class3ofGradeLF787isonlyavailableinthe4B16.9Factory-MadeWroughtSteelButt-WeldingFittingsquenched-and-precipi

8、tationheattreatedcondition.B16.10Face-to-FaceandEnd-to-EndDimensionsofFer-1.3SupplementaryrequirementsareprovidedforusewhenrousValv