BS 6364-1984 阀门标准 Specification for Valves for cry

BRITISHSTANDARDBS6364:1984IncorporatingAmendmentsNos.1,2and3SpecificationforValvesforcryogenicserviceICS23.060.01LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,TueAug2200:27:12BST2006,UncontrolledCopy,(c)BSIBS6364:1984ThisBritishStandard,havingbeenpreparedunderthedirectionoftheMechanicalEngineeringStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton29February1984©BSI05-1999ISBN0580137864CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheMechanicalEngineeringStandardsCommittee(MEE/-)toTechnicalCommitteeMEE/191uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofHydraulicEquipmentManufacturersBritishChemicalEngineeringContractorsAssociationBritishCompressedGasesAssociationBritishGasCorporationBritishShipResearchAssociationBritishShipbuildersBritishValveManufacturersAssociationLtd.CopperDevelopmentAssociationCopperTubeFittingsManufacturers’AssociationCouncilofIronfoundryAssociationsElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsersAssociationGambica(BEAMA)GeneralCouncilofBritishShippingGreaterLondonCouncilHealthandSafetyExecutiveInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterEngineersandScientistsNationalCoalBoardSocietyofBritishGasIndustriesSteelCastingResearchandTradeAssociationWaterCompaniesAssociationCooptedmembersAmendmentsissuedsincepublicationAmd.No.DateofissueComments6591April19919431March199710115September1998IndicatedbyasidelineinthemarginLicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,TueAug2200:27:12BST2006,UncontrolledCopy,(c)BSIBS6364:1984©BSI05-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiSection1.General1Scope12Definitions13Generalrequirements1Section2.Design4Requirements15Materials36Non-destructivetesting37Repairofcastings4Section3.Testing8Pressuretesting49Marking4AppendixACryogenictest5AppendixBPreferredmaterials7AppendixCInformationtobesuppliedbypurchaser8Figure1—Valvewithextendedbonnet/gland2Figure2—Typicalarrangementoflowtemperaturetypetestrig6Table1—Minimumglandextensionlengthforcoldboxapplications3Table2—Austeniticsteels8Table3—Non-ferrousmaterials8PublicationsreferredtoInsidebackcoverLicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,TueAug2200:27:12BST2006,UncontrolledCopy,(c)BSIBS6364:1984ii©BSI05-1999ForewordThisBritishStandardhasbeenpreparedunderthedirectionoftheMechanicalEngineeringStandardsCommittee.Itisthefirstnationalstandardforvalvesforcryogenicservicebutitisintendedthatitcanonlybeusedinconjunctionwiththeappropriatevalveproductstandardsincetherequirementsandtestsspecifiedareadditionaltothosespecifiedinthevalveproductstandards.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,pages1to8,aninsidebackcoverandabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,TueAug2200:27:12BST2006,UncontrolledCopy,(c)BSIBS6364:1984©BSI05-19991Section1.General1ScopeThisBritishStandardspecifiestherequirementsforthedesign,manufactureandtestingofvalvesforcryogenicservice.ItisarequirementofthisstandardthatthevalvescomplywiththeappropriatevalveproductBritishStandards,i.e.:steelwedgegatevalves:BS1414;steelcheckvalves:BS1868;steelglobeandglobestopandcheckvalves:BS1873;steelballvalves:BS5351;steelwedgegate,globeandcheckvalvesDN50andsmaller:BS5352;copperalloyglobe,globestopandcheck,checkandgatevalves:BS5154;testingofvalves:BS6755;butterflyvalvesforgeneralpurposes:BS5155.ThesizerangecoveredbythisstandardisDN15toamaximumnominalsizeappropriatetotheaboveproductstandards,inthetemperaturerange–50°Cto–196°C,yetcapableofoperationatambientconditionstoallowforstart-upandrun-down.NOTE1Formarineapplicationswheredesigntemperaturesarebelow–165°CattentionisdrawntotheneedtocheckrequirementswiththerelevantStatutoryAuthority.AppendixCliststheinformationtobesuppliedbythepurchaser.NOTE2Thetitlesofthepublicationsreferredtointhisstandardarelistedontheinsidebackcover.2DefinitionsForthepurposesofthisBritishStandardthefollowingdefinitionsapply.2.1nominalsize(DN)anumericaldesignationofsizewhichiscommontoallcomponentsinapipingsystemotherthancomponentsdesignatedbyoutsidediametersorbythreadsize.ItisaconvenientroundnumberforreferencepurposesandisonlylooselyrelatedtomanufacturingdimensionsNOTE1ItisdesignatedbyDNfollowedbyanumber.NOTE2ThisdefinitionisinaccordancewithISO6708.2.2nominalpressure(PN)anumericaldesignationrelatingtopressurethatisaconvenientroundnumberforreferencepurpo