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BRITISHSTANDARDBS1414:1975IncorporatingAmendmentNos.1and2SpecificationforSteelwedgegatevalves(flangedandbutt-weldingends)forthepetroleum,petrochemicalandalliedindustriesUDC621.646.5:669.14:[622.313+662.753+665.6]BS1414:1975ThisBritishStandard,havingbeenapprovedbythePetroleumEquipmentIndustryStandardsCommittee,waspublishedundertheauthorityoftheExecutiveBoardon30April1975©BSI08-1999FirstpublishedJanuary1949FirstrevisionJune1954SecondrevisionMarch1960ThirdrevisionApril1975ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7(formerlyPEE/1)Draftforcomment71/37781DCISBN0580089916Co-operatingorganizationsThePetroleumEquipmentIndustryStandardsCommittee,underwhosesupervisionthisBritishStandardwasprepared,consistsofrepresentativesfromthefollowingGovernmentdepartmentsandscientificandindustrialorganizations:BritishGasCorporationBritishMechanicalEngineeringConfederationBritishRubberManufacturers’AssociationLtd.BritishSteelIndustry*CouncilofBritishManufacturersofPetroleumEquipment*DepartmentofEnergy(Oil)OilCompaniesMaterialsAssociation*ProcessPlantAssociationTheorganizationsmarkedwithanasteriskintheabovelist,togetherwiththefollowing,weredirectlyrepresentedonthecommitteeentrustedwiththepreparationofthisBritishStandard:AssociationofHydraulicEquipmentManufacturersBritishChemicalEngineeringContractors’AssociationBritishIndustrialMeasuringandControlApparatusManufacturers’AssociationBritishPlasticsFederationBritishShipResearchAssociationBritishValveManufacturers’AssociationEngineeringEquipmentUsers’AssociationSteelCastingsAssociationAmendmentsissuedsincepublicationAmd.No.DateofissueComments5837June19886562August1990IndicatedbyasidelineinthemarginBS1414:1975©BSI08-1999iContentsPageCo-operatingorganizationsInsidefrontcoverForewordiiiSection1.General1Scope12References13Nomenclature14Pressureclassification15Pressure/temperatureratings16Nominalsizes17Informationtobesuppliedbythepurchaser4Section2.Design8Body49Bonnet710Wedge711Yoke812Handwheelandhandwheeln...