BS 5155-1984 蝶阀的设计标准

BRITISHSTANDARDBS5155:1984IncorporatingAmendmentNos.1and2SpecificationforButterflyvalvesUDC621.646.25BS5155:1984ThisBritishStandard,havingbeenpreparedunderthedirectionoftheMechanicalEngineeringStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton31July1984©BSI12-1998FirstpublishedNovember1974FirstrevisionJuly1984ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceMEE/191Draftforcomment81/72473DCISBN0580138003CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheMechanicalEngineeringStandardsCommittee(MEE/-)toTechnicalCommitteeMEE/191uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofHydraulicEquipmentManufacturersBritishChemicalEngineeringContractors’AssociationBritishCompressedGasesAssociationBritishGasCorporationBritishShipResearchAssociationBritishShipbuildersBritishValveManufacturers’AssociationLtd.CopperDevelopmentAssociationCopperTubeFittingsManufacturers’AssociationCouncilofIronfoundryAssociationsElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICAGeneralCouncilofBritishShippingGreaterLondonCouncilHealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterEngineersandScientistsNationalCoalBoardSocietyofBritishGasIndustriesSTCWaterRegulationsandFittingsSchemeSteelCastingResearchandTradeAssociationWaterCompaniesAssociationCooptedmembersThefollowingbodywasalsorepresentedinthedraftingofthestandard:InstitutionofCivilEngineersAmendmentsissuedsincepublicationAmd.No.DateofissueComments5919March19886990May1992IndicatedbyasidelineinthemarginBS5155:1984©BSI12-1998iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiiSection1.General1Scope12Definitions13Types14Nominalsizerange25NominalandClasspressuredesignations26Pressure/temperatureratings27Dimensionsandtolerancesofbodyends3Section2.Designandoperation8Design69Operation6Section3.Materials10Materials8Section4.Testing11Pressuretestrequirements912Pressuretesting913Firetype-testeddesigns914Anti-staticdesigns915Testcertificate9Section5.Marking16General1017Bodymarking1018Bodyoridentificationplatemarking1019Materialsymbols10Section6.Preparationforstorageandtransportation20General1121Diskposition1122Bodyends11Section7.Manufacturer’scertificate23Manufacturer’scertificate12AppendixAInformationtobesuppliedbypurchaser13AppendixBEffectofnon-metallicmaterialsonwaterquality13Figure1—Butterflyvalve:doubleflangedtype1Figure2—Butterflyvalve:singleflangewafertype2Figure3—Butterflyvalve:flangelesswafertype2Figure4—Butterflyvalve:U-sectionwafertype2Table1—DNsizesforPNdesignatedvalvesandnominalpipesizesforClassdesignatedvalves3Table2—Pressure/temperatureratings3Table3—Pressure/temperatureratingsforclass125castironvalves3Table4—Flangedimensions3Table5—DimensionsofClass125flanges4Table6—Face-to-facedimensions5Table7—Tolerancesonface-to-facedimensions5Table8—Basicmaterials8BS5155:1984ii©BSI12-1998PageTable9—Applicabilityofpressuretests9Table10—Maximumpermissibleseatleakagerates9Table11—Tabledeleted9PublicationsreferredtoInsidebackcoverBS5155:1984©BSI12-1998iiiForewordThisrevisionofBS5155hasbeenpreparedunderthedirectionoftheMechanicalStandardsCommittee.Itisoneofaseriesofrevisedstandardsforvalvesthataredesignedtomeetthemajorityofnationalrequirementsandtoassistbothmanufacturersandusers.Thisrevisionreflectscurrentmanufacturingpractice,deletesthePN2.5pressuredesignationbutextendsthepressurerangetoincludeClass300.Itsupersedesthe1974editionwhichiswithdrawn.Thesatisfactoryperformanceofanyvalvedependsondesign,manufacture,correctinstallationandmaintenance;thisstandardspecifiesrequirementsfordesignandmanufacturebutnotinstallationormaintenance.GuidanceontheinstallationanduseofvalvesisgiveninBS6683.Thisstandarddoesallowoptionstothestandardproduct,thepreferredoptionbeingindicatedbyanotetotheappropriateclause.Particularrequirementsshouldbeindicatedbythepurchaser,asstatedinappendixA,otherwisethemanufacturerwillsupplytheproductinaccordancewiththepreferredoption(s)inrespectofthefollowing:a)meansofoperation;b)directionofoperatingefforttoclose;c)trimmaterials;d)flangedendsdrilled.Throughoutthisstandardallpressureratingsspecifiedaregaugepressures.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesitoiv,pages1to14,aninsidebackcoverandabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.ivblankBS5155:1984©BSI12-19981Section1.General1ScopeThisBritishStandardspecifiesrequirementsforsize,rating,design,material