ANSI FCI 70-2-2006 控制阀门座泄漏

ANSI/FCI70-2-2006AMERICANNATIONALSTANDARDCONTROLVALVESEATLEAKAGEFluidControlsInstitute,Inc.Sponsor:FluidControlsInstitute,Inc.1300SumnerAveCleveland,Ohio44115-2851iiANSI/FCI70-2-2006AMERICANNATIONALSTANDARDControlValveSeatLeakageSponsorFluidControlsInstitute,Inc.iiiAmericanNationalStandardimpliesaconsensusofthosesubstantiallyconcernedwithitsscopeandprovisions.AnAmericanNationalStandardisintendedasaguidetoaidthemanufacturer,theconsumer,andthegeneralpublic.TheexistenceofanAmericanNationalStandarddoesnotinanyrespectprecludeanyone,whetherhehasapprovedthestandardornot,frommanufacturing,marketing,purchasingorusingproducts,processes,orproceduresnotconformingtothestandard.AmericanNationalStandardsaresubjecttoperiodicreviewandusersarecautionedtoobtainthelatesteditions.CAUTIONNOTICE:ThisAmericanNationalStandardmayberevisedorwithdrawnatanytime.TheproceduresoftheAmericanNationalStandardsInstituterequirethatactionbetakentoreaffirm,revise,orwithdrawthisstandardnolaterthanfiveyearsfromthedateofpublication.PurchasersofAmericanNationalStandardsmayreceivecurrentinformationonallstandardsbycallingorwritingtheAmericanNationalStandardsInstitute.Sponsoredandpublishedby:FLUIDCONTROLSINSTITUTE,INC.1300SumnerAvenueCleveland,OH44115-2851Phn:216/241-7333Fax:[phone]E-Mail:[e-mail]:©2006,1998,1968byFluidControlsInstitute,Inc.AllRightsReservedNopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.Suggestionsforimprovementofthisstandardwillbewelcome.TheyshouldbesenttotheFluidControlsInstitute,Inc.PrintedintheUnitedStatesofAmericaAmericanNationalStandardivCONTENTSPAGEForeword..............................................................................................................................v1.Purpose..........................................................................................................................12.ScopeandLimitations...................................................................................................13.Definitions......................................................................................................................14.LeakageSpecificationsandClasses...............................................................................1-25.TestProcedures..............................................................................................................2-46.References......................................................................................................................4TablesTable1..................................................................................................................................2Table2..................................................................................................................................3vForeword(ThisforewordisincludedforinformationonlyandisnotpartofANSI/FCI70-2-2006,ControlValveSeatLeakage.)Thisvoluntarystandardhasbeencompiledandissuedinthepublicinterest.Itisintendedtoeliminatepresentmisunderstandingsandtoassistandguidethosepeopleinvolvedinthespecification,useormanufactureofcontrolvalves.Thisstandard,formerlyknownasASMEB16.104,wasoriginallyadoptedonNovember24,1970asFCI70-2.Thestandardhasbeenrevisedseveraltimesthroughtheyearstostaycurrentastheindustryanditsproductshaveevolvedandadvanced.ThestandardwasrevisedbytheFCIControlValveSectionin1998inordertomaintainconsistencywiththeappropriateIECStandards(IEC534-4).Thestandardwasrevisedin2003toaddtheoptiontopermitlowpressuregastestingtodetermineClassVleakage.Duringthecanvassofthe2003version,onerespondentaskedforthestandardtobemodifiedtospecificallyexcludeon/offvalvesusedfortightshut-off.TheFCIControlValveandRegulatorSectionnotesthatFCI70-2hasbeenintendedtoapplytocontrolvalveseatleakage.Iflineisolationand/orabsolutetightshut-offisanormalexpectationofthevalveapplication,theFCIControlValveandRegulatorSectionsrecommendspecifyinganotherstandard,suchasAPI598,“ValveTestandInspection.”TheexistenceofaFluidControlsInstitute(FCI)standarddoesnotinanyrespectprecludeanymemberornon-memberfrommanufacturingorsellingproductsnotconformingtothisstandardnoristheFCIresponsibleforitsuse.FCIrecognizestheneedtoperiodicallyreviewandupdatethisstandard.SuggestionsforimprovementshouldbeforwardedtotheFluidControlsInstitute,Inc.,1300SumnerAvenue,Cleveland,Ohio,44115-2851.Allconstructivesuggestionsforexpansionandrevisionofthisstandardarewelcome.1ANSI/FCI70-2-2006AMERICANNATIONALSTANDARDControlValveSeatLeakage1.PURPOSE1.1Thisstandardestablishesaseriesofseatleakageclassesforcontrolvalvesanddefinesthetestprocedures.2.SCOPE&LIMITATIONS2.1Selectionofaleakageclassisnotrestrictedastovalvedesign,butacceptablevaluesforvariouscommerciallyavailabledesignsaresuggestedforeachclassunderSection4.2.2Thestandardcannotbeusedasabasisforpredictingleakageatconditionsotherthanthosespecified.2.3ThisstandardissimilartoIEC60534-4,exceptthatnoprovisionismadeforClassIV-S1andt