BS 1042-1.4-1992 封闭管道内液体流量的测量.第1部分压差器件.第4节第1和2节所述器

BRITISHSTANDARDBS1042-1.4:1992IncorporatingAmendmentNo.1Measurementoffluidflowinclosedconduits—Part1:Pressuredifferentialdevices—Section1.4GuidetotheuseofdevicesspecifiedinSections1.1and1.2LicensedCopy:AUBUser,na,SatJul0712:49:00GMT+00:002007,UncontrolledCopy,(c)BSIBS1042-1.4:1992ThisBritishStandard,havingbeenpreparedunderthedirectionoftheIndustrial-processMeasurementandControlStandardsPolicyCommittee,waspublishedundertheauthorityoftheStandardsBoardandcomesintoeffecton31March1992©BSI12-1998FirstpublishedMarch1984SecondeditionMarch1992ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePCL/2SpecialannouncementinBSINews,September1991ISBN0580204049CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheIndustrial-processMeasurementandControlStandardsPolicyCommittee(PCL/-)toTechnicalCommitteePCL/2,uponwhichthefollowingbodieswererepresented:BritishCompressedAirSocietyBritishGasplcDepartmentofEnergy(GasandOilMeasurementBranch)DepartmentofTradeandIndustry(NationalEngineeringLaboratory)ElectricityIndustryinUnitedKingdomEnergyIndustriesCouncilGAMBICA(BEAMALtd.)InstituteofMeasurementandControlInstituteofPetroleumInstituteofTradingStandardsAdministrationInstitutionofGasEngineersInstitutionofMechanicalEngineersSocietyofBritishGasIndustriesWaterServicesAssociationofEnglandandWalesThefollowingbodieswerealsorepresentedinthedraftingofthestandard,throughsubcommitteesandpanels:EngineeringEquipmentandMaterialsUsers’AssociationInstitutionofWaterandEnvironmentalManagementUnitedKingdomOffshoreOperators’AssociationAmendmentsissuedsincepublicationAmd.No.DateComments8154June1994IndicatedbyasidelineinthemarginLicensedCopy:AUBUser,na,SatJul0712:49:00GMT+00:002007,UncontrolledCopy,(c)BSIBS1042-1.4:1992©BSI12-1998iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiSection1.General1Scope12Symbols1Section2.Calculations3General24Informationrequired25Basicequations36Calculationoforificeorthroatdiameter37Calculationofrateofflow10Section3.Physicaldata8Properties129Densityoffluid1210Viscosityoffluid1411Isentropicexponent14Section4.Additionalinformationonmeasurementsandonpulsatingandswirlingflow12Measurements1513Pulsatingflow2014Swirlingflow23AppendixAReferencesforphysicaldata24Index25Figure1—Possiblelocationsofdensitymeters17Figure2—Multiplyingfactorsforthermalexpansion19Figure3—Dampingpulsationsingasflow22Figure4—Dampingpulsationsinliquidflow22Table1—Symbols1Table2—ApproximatevaluesofCEb2forsquare-edgedorificeplateswithcorner,D,D/2orflangetapsasappropriate5Table3—ApproximatevaluesofCEb2forISA1932nozzles,androughcast,machinedandroughweldedconvergentventuritubes6Table4—ApproximatevaluesofCEb2forlongradiusnozzles7Table5—ApproximatevaluesofCEb2forquartercircleorificeplates8Table6—ApproximatevaluesofCEb2foreccentricorificeplates8Table7—Physicalpropertiesofselectedliquids12Table8—Physicalpropertiesofselectedgases13LicensedCopy:AUBUser,na,SatJul0712:49:00GMT+00:002007,UncontrolledCopy,(c)BSIBS1042-1.4:1992ii©BSI12-1998ForewordThisSectionofBS1042hasbeenpreparedunderthedirectionoftheIndustrial-processMeasurementandControlStandardsPolicyCommittee.ItsupersedesBS1042-1.4:1984,whichiswithdrawn.ThisisSection1.4ofaseriesofSectionsofBS1042onthemeasurementoffluidflowinclosedconduits,asfollows:Section1.1Specificationforsquare-edgedorificeplates,nozzlesandventuritubesincircularcrosssectionconduitsrunningfullSection1.2Specificationforsquare-edgedorificeplatesandnozzles(withdrainholes,inpipesbelow50mmdiameter,asinletandoutletdevices)andotherorificeplatesSection1.3MethodofmeasurementofgasflowbymeansofcriticalflowVenturinozzles.Section1.5GuidetotheeffectofdeparturefromtheconditionsspecifiedinSection1.1Section1.1specifiesthegeometryandmethodofuseoforificeplates,nozzlesandVenturitubesinsertedinconduitrunningfull,tomeasuretheflowrateofthefluidintheconduit.ItistechnicallyequivalenttoISO5167:1980publishedbytheInternationalOrganizationforStandardization(ISO).ItshouldbenotedthatguidanceontheeffectsofdeparturefromtheconditionsspecifiedinBS1042-1.1canbefoundinBS1042-1.5:1987.AnindextoSections1.1,1.2and1.4isprovidedinthisSection,tofacilitatetherapidcross-referencingofsubjectmatter.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,pages1to33andabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.LicensedCopy:AUBUser,na,SatJul0712:49:00GMT+00:002007,UncontrolledCopy,(c)BSIBS1042-1.4:1992©BSI12-19981Section1.General1ScopeThisSectionofBS1042providessamplecalculations,physicaldataandotheradditionalinformationforusingthepressuredifferentialdevicesspecifiedinBS1042-1.1andBS1042-1.2.NOTEThetitlesofthepublicationsreferredtointhisstandardarelistedontheinsidebackcover.2SymbolsTh