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BRITISHSTANDARDBS5150:1990SpecificationforCastirongatevalvesUDC621.646.5:669.13BS5150:1990ThisBritishStandard,havingbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsPolicyCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton31May1990©BSI01-1999Firstpublished,asBS464,January1962FirstrevisionNovember1965Secondrevision,publishedasBS5150,September1974ThirdrevisionMay1990ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7Draftforcomment88/74715DCISBN0580183718CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePipingSystemsComponentsStandardsPolicyCommittee(PSE/-)toTechnicalCommitteePSE/7,uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociationOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofBuildingComponentManufacturersLtd.BritishChemicalEngineeringContractors’AssociationBritishCompressedGases’AssociationBritishFoundryAssociationBritishGasplcBritishMaritimeTechnologyBritishPlumbingFittingsManufacturers’AssociationBritishValveandActuatorManufacturers’AssociationCharteredInstitutionofBuildingServicesEngineersCopperDevelopmentAssociationDepartmentoftheEnvironment(PropertyServicesAgency)ElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICA(BEAMALtd.)HealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterandEnvironmentalManagement(IWEM)SocietyofBritishGasIndustriesWaterCompanies’AssociationWaterServicesAssociationofEnglandandWalesWestMidlandsCBIThefollowingbodieswerealsorepresentedinthedraftingofthestandard,throughsub-committeesandpanels:BritishEffluentandWaterAssociationBritishNon-ferròusMetalsFederationAmendmentsissuedsincepublicationAmd.No.DateofissueCommentsBS5150:1990©BSI01-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiSection1.General1Scope12Definitions13Typesofvalves14Nominalsizes15Nominalpressures26Pressure/temperatureratings27Dimensionsandtolerances3Section2.Design8General79Bodyorbonnettappings710Stemsealing711Bodyendportsandseatbores712Backseat713Valvesforpotablewater814Operation815Indicators8Section3.Materials16Body,bonnet,yokeandstuffingboxmaterials917Trim,stemnut/yokesleevematerials9Section4.Testing18Productionpressuretesting1119Testcertificate11Section5.Marking20Marking1221Identificationsymbols12Section6.Preparationforstorageandtransportation22General1323Obturatorpositionandbodyends13AppendixAInformationtobesuppliedbythepurchaser14AppendixBDesignationforpurchasingpurposes15Figure1—Sketchesshowingmaximumheightsofvalves6Table1—Pressure/temperatureratingsforPNdesignatedvalves2Table2—Pressure/temperatureratingsforvalveswithClass125andClass150flanges3Table3—Face-to-facedimensionsandtolerancesofflangedendnon-clamppatternvalves4Table4—Face-to-facedimensionsofflangedendclamppatternvalves5Table5—MinimumoutsidediametersofsealingfacesforparallelthreadedvaluescomplyingwithBS27795Table6—Maximumheightsofvalves5Table7—Minimumthreadnominalsizeforbodyorbonnettappings7Table8—Dimensionsofbodyendportsandseatbores8Table9—Body,bonnet,yokeandstuffingboxmaterials9Table10—Materialsfortrimcomponentsandyokesleeve10Table11—Identificationsymbols12Table12—Identificationcodes15PublicationsreferredtoInsidebackcoverBS5150:1990ii©BSI01-1999ForewordThisBritishStandardhasbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsPolicyCommitteeandconstitutesthefirstrevisionofBS5150:1974whichiswithdrawn.ThisBritishStandardtakesintoaccountISO5996publishedbytheInternationalOrganizationforStandardization(ISO).ItincorporatesmanyoftherequirementsofISO5996forflangedvalvesalthoughnotnecessarilyinthesameformat;theessentialdifferencesbetweenthisBritishStandardandISO5996areasfollows.a)ThescopehasbeenextendedtocovervalvesofnominalsizesDN10toDN1000.b)Valveshavingthreadedendsofsizesintherange1/2to6havebeenincluded.c)ValvesofnominalsizesDN550,DN650andDN750havebeenomitted.d)ValveshavingnominalpressuredesignationsPN1,PN1.6,PN2.5,PN4,PN20,PN40andPN50havebeenomitted.e)ValveshavingClass125andClass150flangeshavebeenincluded.f)Clamppatternvalveshavingthebody-to-bonnetconnectionviaaUbolthavebeenincluded.g)Greaterdetailshavebeenspecifiedfortrimmaterials.h)Operationhasbeengiveningreaterdetail.i)Markingrequirementshavebeenincludedingreaterdetail.j)Inspectionrequirementshavebeenomitted.k)Informationtobesuppliedbythepurchaserhasbeenincludedinanon-mandatoryappendix(seeappendixA).l)ReferencetoBS6920-1ismadeconcerningrequirementsforvalveswhenusedtoconveypotablewater.TheessentialdifferencesbetweenthisBritishStandardandBS5150:1974areasfollows.1)ValveshavingnominalpressuredesignationsofPN1.6,PN2.5andPN4havebeenomitted.2)ShortseriesvalvesfornominalpressuresPN10areincludedforthefirsttime.3)Valveswithbodiesmadefromspheroidalgraphiteandmalleablecastironareincludedforthefirsttime.4)Clamppatternvalveshavingthebody-to-bonn