【英文标准名称】:ASMESectionVIIIDivision2CriteriaandCommentary
【原文标准名称】:美国机械工程师协会第VIII节第2分册标准和评注
【标准号】:ASMEPTB-1-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009-01-01
【实施或试行日期】:
【发布单位】:美国机械工程师协会(US-ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:评注;气瓶;压力容器
【英文主题词】:Commentary;Gascylinders;Pressurevessels
【摘要】:Part1,paragraph1.2definesthescopeofcoverageforVIII-2.Thetermscopereferstoboththetypeofpressureequipmentbeingconsideredinthedevelopmentoftheserules,aswellasthegeometricscopeofthevesselthatisstampedasmeetingVIII-2.InaccordancewithPart1,paragraph1.2.1.1,pressurevesselsaredefinedascontainersforthecontainmentofpressure,internalorexternal.Thispressuremaybeobtainedfromanyexternalsource,orbytheapplicationofheatfromadirectorindirectsource,asaresultofaprocess,oranycombinationthereof.ThemannerinwhichthescopeofthestandardisdescribedfollowsverycloselytotheintroductionsectionofVIII-1.Inthefollowingparagraphs,adiscussionofrequirementsisprovidedonlywhereasignificantdifferenceexistsbetweenVIII-2andthescopedefinitionfromVIII-1,orwhereamajorchangewasmadefromOldVIII-2.Withregardtopressurevesselsinstalledinnon-stationaryapplications,Part1,paragraph1.2.1.2.bnowpermitsstampingofVIII-2vesselsinstalledonmotorvehiclesandrailwaycars.ThisparticularapplicationwasprohibitedintheOldVIII-2.ConstructionandstampingofVIII-2vesselsinnonstationaryapplicationsrequiresapriorwrittenagreementwiththelocaljurisdictionalauthoritycoveringoperationandmaintenancecontrolforaspecificservice.ThisoperationandmaintenancecontrolmustberetainedduringtheusefullifeofthepressurevesselbytheuserinconformancewiththeUsersDesignSpecification.Part1,paragraph1.2.1.2.e.3definespressurevesselsinwhichsteamisgeneratedbutwhicharenotclassifiedasUnfiredSteamBoilersthatrequireconstructioninaccordancewiththerulesofSectionIorVIII-1.AthirdcategoryforavesselthatgeneratessteamthatmaybeconstructedtoVIII-2wasadded:vesselsinwhichsteamisgeneratedbutnotwithdrawnforexternaluse.OnesignificantdifferencebetweenVIII-2andtheOldVIII-2isspecialservicevesselssuchasthoseinlethalservice.InOldVIII-2,paragraphAG-301.1(c),theuserand/orhisdesignatedagenthadtodefineintheUDSifavesselwasintendedforlethalservice.Iflethalservicewasspecified,thenadditionaltechnicalrequirements(e.g.enhancedNDE,restrictionsonmaterial,etc.)wereimposedonthisvessel.InVIII-2,additionalrequirementsarenotspecifiedforlethalserviceoranyotherspecialservicecondition.Therationalebehindthischangeisthattheuserand/orhisdesignatedagentareresponsibletodescribeintheUDS(seePart2,paragraph2.2.2),theintendedoperationofthevessel,andifavesselisintendedforaservicethatisdangeroustolifeandproperty,thentheusershouldspecifyanyadditionalrequirementstomitigatetherisks.JustasithasbeentheruleinASMEthatitsstandardswouldnotdefinewhenavesselisinlethalservice,whatadditionalrequirementswouldbeappropriateforanygivenvesselarebestdefinedbytheuser,andnotbytheCommittee.
【中国标准分类号】:J98
【国际标准分类号】:23_020_30
【页数】:382P;A4
【正文语种】:英语