BS 5351-1986 Specification for steel ball valves f

BRITISHSTANDARDCONFIRMEDNOVEMBER1991BS5351:1986ReprintedincorporatingAmendmentsNo.1,No.2andNo.3SpecificationforSteelballvalvesforthepetroleum,petrochemicalandalliedindustriesUDC621.646.5-034.14:665.6LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonJul3112:48:13BST2006,UncontrolledCopy,(c)BSIBS5351:1986ThisBritishStandard,havingbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton31January1986©BSI02-1999FirstpublishedMay1976FirstrevisionJanuary1986ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7Draftforcomment84/70325DCISBN0580150070CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePipingSystemsComponentsStandardsCommittee(PSE/-)toTechnicalCommitteePSE/7uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofHydraulicEquipmentManufacturersBritishChemicalEngineeringContractors’AssociationBritishCompressedGasesAssociationBritishFoundryAssociationBritishGasCorporationBritishMaritimeTechnologyBritishShipbuildersBritishValveManufacturers’AssociationLtd.CopperDevelopmentAssociationCopperTubeFittingsManufacturers’AssociationElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICA(BEAMALtd.)GeneralCouncilofBritishShippingGreaterLondonCouncilHealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterEngineersandScientistsSocietyofBritishGasIndustriesSteelCastingResearchandTradeAssociationWaterAuthoritiesAssociationWaterCompaniesAssociationAmendmentsissuedsincepublicationAmd.No.DateofissueComments5527March19875836January19886271September1990IndicatedbyasidelineinthemarginLicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonJul3112:48:13BST2006,UncontrolledCopy,(c)BSIBS5351:1986©BSI02-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiiSection1.General1Scope12Definitions13Valvepatterns14Nominalsizes25Pressuredesignation26Pressure/temperatureratings27Dimensions5Section2.Designandmaterials8Design79Operation1010Materials10Section3.Performance11Pressuretesting1212Firetesting1213Anti-statictesting12Section4.Marking14General13Section5.Preparationforstorageandtransportation15General1416Bodyends14AppendixAInformationtobespecifiedbypurchaser15AppendixBWeld-endpreparations16AppendixCTypicalballvalveconstructions17Figure1—Valveboreconfigurations1Figure2—Typicalvariationsofconstruction8Figure3—Weld-endpreparation16Figure4—Typicalbevelforwallthickness(t)22mmorlessforpipelineapplications17Figure5—Two-piecesplitbodyorone-pieceendentrybody18Figure6—One-piecebody,endentryortopentry19Figure7—One-piecebodyortwo-piecesplitbody,threadedorextendedweldend20Figure8—Splitbodysandwichconstruction21Table1—Nominalsizesofvalvesaccordingtoendfitting2Table2—Pressuredesignationsofvalvesaccordingtoendfitting3Table3—Minimumpressure/temperatureseatratingsforballvalves3Table4—Class800bodyratings4Table5—Nominalpressureandclassratingsandnominalsize5Table6—End-to-enddimensionsofbutt-weld-endvalves5Table7—Socket-weld-enddetails6Table8—Threaded-enddetails6Table9—MinimumballandbodyportdiametersPN10,PN16,Class150,PN25,PN40,Class300,Class600andClass8006Table10—Shellthickness7LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonJul3112:48:13BST2006,UncontrolledCopy,(c)BSIBS5351:1986©BSI02-1999PageTable11—Draintappingsize9Table12—Minimumforceforwrenchesandhandwheels9Table13—Additionalmaterialspermittedforuseinthemanufactureofvalvesfrombar-stock10Table14—Pressuretestdurations12Table15—Typicalmaterialsymbols13Publicationsreferredto22LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonJul3112:48:13BST2006,UncontrolledCopy,(c)BSIBS5351:1986©BSI02-1999iiiForewordThisBritishStandardhasbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsCommitteeandconstitutesthefirstrevisionofBS5351:1976whichiswithdrawn.Theopportunityhasbeentakenincarryingoutthisrevisiontointroduceinternationallyagreedpressure/temperatureratings,basedonthedefinitionofnominalpressure(PN)giveninISO72681),coveringratingspreviouslygiveninGerman(DIN)andAmerican(ANSI)standards.However,inthisrevisiontheuseofPNhasbeenlimitedtovalveswithflangesdesignatedPN10,PN16,PN25andPN40inaccordancewithBS4504-1.ForvalveswithflangescomplyingwithBS1560-2,classratingshavebeenretained.ThiswillbereviewedlaterwhenBS1560-2isrevisedtointroduceflangeshavingmetricboltingandwhicharedesignatedbythePNsystem.ThedesignationClass800forthreadedandsocketweldendvalveshasalsobeenretainedasthereisnoequivalentinthePNsystem.ThisrevisionalsotakesaccountofthelatestagreementsinISO/TC153/SC1,Valves—Design,construction,markingandtesting,andISO/TC5/SC10,Metallicflangesandtheirjoints.Onthisbasistheterminologyanddefinitionsinthisstandardarein