BS 6683-1985 Guide to installation and use of valv

LicensedCopy:RobertBlyth,Brown&RootLtd,April25,2002,UncontrolledCopy,(c)BSIBRITISHSTANDARDBS6683:1985IncorporatingAmendmentNo.1GuidetoInstallationanduseofvalvesUDC621.646.005LicensedCopy:RobertBlyth,Brown&RootLtd,April25,2002,UncontrolledCopy,(c)BSIBS6683:1985ThisBritishStandard,havingbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton31October1985©BSI06-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7Draftforcomment84/72775DCISBN0580147460CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePipingSystemsComponentsStandardsCommittee(PSE/-)toTechnicalCommitteePSE/7,uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofHydraulicEquipmentManufacturersBritishChemicalEngineeringContractorsAssociationBritishCompressedGasesAssociationBritishFoundryAssociationBritishGasCorporationBritishMaritimeTechnologyBritishShipbuildersBritishValveManufacturers’AssociationLtd.CopperDevelopmentAssociationCopperTubeFittingsManufacturers’AssociationElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICA(BEAMALtd.)GeneralCouncilofBritishShippingGreaterLondonCouncilHealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterEngineersandScientistsSocietyofBritishGasIndustriesSteelCastingResearchandTradeAssociationWaterAuthorities’AssociationWaterCompanies’AssociationAmendmentsissuedsincepublicationAmd.No.DateofissueComments6604April1991IndicatedbyasidelineinthemarginLicensedCopy:RobertBlyth,Brown&RootLtd,April25,2002,UncontrolledCopy,(c)BSIBS6683:1985©BSI06-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiSection1.General1.1Scope1Section2.Serviceandenvironmentalconsiderations2.1Fluid22.2Pressure-temperaturerating22.3Layoutandsiting22.4Bendingstrength22.5Fire-tested22.6Pressuresurgeandcycling32.7Throttling32.8Flowcoefficients32.9Effectsoftemperature32.10Trappedpressure42.11Corrosion42.12Stemsealing42.13Cryogenicservices42.14Operatingeffort42.15Vibration4Section3.Storageandhandling3.1General53.2Handling53.3Storage5Section4.Installation4.1General64.2Inspection64.3Threadedvalve/pipeassembly64.4Flangedjointassembly74.5Weldjointassembly74.6Testingandadjustment7Section5.Operationandmaintenance5.1General95.2Operationofmanualvalves95.3Operationofpoweractuatedvalves105.4Quarterturnvalves105.5Noise105.6Maintenance10PublicationsreferredtoInsidebackcoverLicensedCopy:RobertBlyth,Brown&RootLtd,April25,2002,UncontrolledCopy,(c)BSIBS6683:1985ii©BSI06-1999ForewordThisBritishStandardhasbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsCommittee.Sincetheincorrectuseofvalvetypesmayresultinoperatingproblemswhichadverselyaffectsystemsafetyandefficiency,thevalveindustryrecognizesthatitwillbenefitallconcernedifinformationcanbemadeconvenientlyavailabletothoseresponsibleforinstallingandusingvalvestohelpthemavoidsuchproblems.Valvesareofmanytypesandareusedinawidevarietyofserviceconditions.Havingcorrectlyselectedavalve,itssatisfactoryperformancedependsonproperpackingandprotectionduringhandlingandstorage,installationandoperation,andadequatemaintenance.Thisstandardpresentsinformationwhichshouldhelpuserstoavoidthemostobviouscausesoftrouble.Thestandarddoesnotincluderequirementsbutisintendedtomaketheusermoreawareoftheproblemsthatcanarise.Adviceregardingaparticularapplicationshouldbeobtainedfromthemanufacturerofthevalve.Ithasnotbeenpossibletoincludeeveryconsiderationrelatedtothesatisfactoryuseofvalves,and,especiallyinabnormalorunusualcircumstances,thepossibleneedforotherconsiderationsandprecautionsshouldberecognized.Observanceoftherecommendationsandprecautionsgiveninthisstandardwillprovideincreasedassuranceofsatisfactoryvalveperformance.Itisintendedthatthisstandardshouldbeusedinconjunctionwiththeappropriatevalveproductstandards(see1.1).Inaddition,thisstandardmaybeusedtoprovideguidancefortheinstallationanduseofvalvesnotcoveredbyproductstandards.SectionsofthisstandardhavebeenbasedonMSSSP92“Valveuserguide”bykindpermissionoftheManufacturer’sStandardizationSocietyoftheValvesandFittingsIndustryIncorporated.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,pages1to12,aninsidebackcoverandabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.LicensedCopy:RobertBlyth,Brown&RootLtd,April25,2002,UncontrolledCopy,(c)BSIBS6683:1985©BSI06-19991Section1.General1.1ScopeThisBritishStandardp