BS 7350-1990 —ouble regulating globe valves and fl

BRITISHSTANDARDBS7350:1990IncorporatingAmendmentNo.1SpecificationforDoubleregulatingglobevalvesandflowmeasurementdevicesforheatingandchilledwatersystemsLicensedCopy:sheffieldunsheffieldun,na,WedOct2508:44:07GMT+00:002006,UncontrolledCopy,(c)BSIBS7350:1990ThisBritishStandard,havingbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsPolicyCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton28October1990©BSI07-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7Draftforcomment89/76940DCISBN0580188507CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePipingSystemsComponentsStandardsPolicyCommittee(PSE/-)toTechnicalCommitteePSE/7,uponwhichthefollowingbodieswererepresented:AmalgamatedEngineeringUnionAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofBuildingComponentManufacturersBritishChemicalEngineeringContractors’AssociationBritishCompressedGasesAssociationBritishFoundryAssociationBritishGasplcBritishMaritimeTechnologyBritishPlumbingFittingsManufacturers’AssociationBritishValveandActuatorManufacturers’AssociationCharteredInstitutionofBuildingServicesEngineersCopperDevelopmentAssociationDepartmentoftheEnvironment(PropertyServicesAgency)ElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICA(BEAMALtd.)HealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterandEnvironmentalManagement(IWEM)SocietyofBritishGasIndustriesWaterCompanies’AssociationWaterServices’AssociationofEnglandandWalesWestMidlandsCBIThefollowingbodieswerealsorepresentedinthedraftingofthestandard,throughsubcommitteesandpanels:BuildingServicesResearchandInformationAssociationInstituteofRefrigerationAmendmentsissuedsincepublicationAmd.No.DateComments6865December1991IndicatedbyasidelineinthemarginLicensedCopy:sheffieldunsheffieldun,na,WedOct2508:44:07GMT+00:002006,UncontrolledCopy,(c)BSIBS7350:1990©BSI07-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordii1Scope12Definitions13Types24Rangesofnominalsizes25Rangesofnominalpressure26Pressure/temperatureratings27Dimensionsandtolerances38Design39Materials610Hydraulicperformance611Typetesting912Productiontesting913Marking1014Preparationforstorageandtransportation1115Manufacturer’scertificate11AppendixAInformationtobesuppliedbythepurchaser12AppendixBTypicalflowmeasurementdeviceconstructions12AppendixCFlowcoefficientmethodoftest14Figure1—Type1flowmeasurementdevices12Figure2—Type2flowmeasurementdevices13Figure3—Type3flowmeasurementdevices13Figure4—Type4flowmeasurementdevices14Figure5—Typicaltestsystem16Figure6—Testsectionwithtestpiecefitted16Figure7—Testsectionwithouttestpiecefitted17Figure8—Testsectionforflowmeasurementdeviceonly17Table1—Rangesofnominalpressure(PN)3Table2—Pressure/temperatureratings:flangedandthreadedends4Table3—Pressure/temperatureratings:compressionends4Table4—Face-to-facedimensionsofflangeddoubleregulatingglobevalvesandflowmeasurementdevices4Table5—Holediametersorslotwidthsofpressuretappingpointoradaptor5Table6—Materialsforthemanufactureoftype1flowmeasurementdevices7Table7—Rangeofsystemflowrates8Table8—Flowcoefficient(Kv)fordoubleregulatingglobevalves8Table9—Flowcoefficient(Kvs)forflowmeasurementdevices8Table10—Bodymaterialdesignation11Publicationsreferredto18LicensedCopy:sheffieldunsheffieldun,na,WedOct2508:44:07GMT+00:002006,UncontrolledCopy,(c)BSIBS7350:1990ii©BSI07-1999ForewordThisBritishStandardhasbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsPolicyCommittee.AtthetimeofpublicationofthisBritishStandard,nocorrespondinginternationalstandardexists.Doubleregulatingglobevalves,andfixedandvariableorificevalvesspecifiedinthisstandardhavebeengenerally,butnotexclusively,developedfromglobevalvesusedforgeneralpurposesspecifiedinBS5152(forcastironbodies),BS5154(forcopperalloybodies)andBS5160(forsteelbodies).ThematerialsspecifiedforthevalvesinthisstandardarethesameasthosespecifiedinBS5152,BS5154andBS5160.TheorificeplatesspecifiedinthisBritishStandardaredistinctfromtheorificeplatesspecifiedinBS1042-1.Thesatisfactoryperformanceofanyvalveorflowmeasurementdevicedependsondesign,manufacture,correctinstallationandmaintenance.Thisstandarddoesnotspecifyselection,installationandmaintenancerequirements,forwhichreferenceshouldbemadetoanappropriateguideorcodeofpractice,e.g.BS6683,BS6880-1,BS6880-2andBS6880-3,CIBSECommissioningcodeseriesW,PSAStandardspecificationM&ENo.3orBSRIAApplicationguideAG12.IthasbeenassumedinthedraftingofthisBritishStandardthattheexecutionofitsprovisionsisentrustedtoappropriatelyqualifiedandexperiencedpeoplebecauseitcallsforproceduresthatmaybeinjurioustohealthifadequateprecautionsarenottaken.Itrefersonlytotechnicalsuitabilityanddoesnotabsolvetheuserfromlegalobligationsrelatingtohealthandsafetyatanystage.Thisrefers,inparticular,topressuretestingandattention