BS EN 731-1996 Gas welding equipment — Air-aspirat

BRITISHSTANDARDBSEN731:1996Gasweldingequipment—Air-aspiratedhandblowpipes—SpecificationsandtestsTheEuropeanStandardEN731:1995hasthestatusofaBritishStandardICS25.160.30BSEN731:1996ThisBritishStandard,havingbeenpreparedunderthedirectionoftheEngineeringSectorBoard,waspublishedundertheauthorityoftheStandardsBoardandcomesintoeffecton15January1996©BSI07-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceWEE/18Draftforcomment92/76498DCISBN058024685XCommitteesresponsibleforthisBritishStandardTheUnitedKingdomparticipationinthepreparationofthisEuropeanStandardwasentrustedtoTechnicalCommitteeWEE/18,Gasweldingequipment,uponwhichthefollowingbodieswererepresented:BritishCompressedGasesAssociationBritishRailwaysBoardConsumerPolicyCommitteeofBSIDepartmentofTradeandIndustry(ConsumerSafetyUnit,CADivision)HealthandSafetyExecutiveLPGasAssociationRailwayIndustryAssociationSouthBankUniversityWeldingManufacturers’Association(BEAMALtd.)AmendmentsissuedsincepublicationAmd.No.DateCommentsBSEN731:1996©BSI07-1999iContentsPageCommitteesresponsibleInsidefrontcoverNationalforewordiiForeword2TextofEN7313ListofreferencesInsidebackcoverBSEN731:1996ii©BSI07-1999NationalforewordThisBritishStandardhasbeenpreparedbyTechnicalCommitteeWEE/18andistheEnglishlanguageversionofEN731:1995Gasweldingequipment—Air-aspiratedhandblowpipes—Specificationsandtests,publishedbytheEuropeanCommitteeforStandardization(CEN).EN731:1995wasproducedasaresultofinternationaldiscussioninwhichtheUKtookanactivepart.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.Cross-referencesPublicationreferredtoCorrespondingBritishStandardEN560:1994BSEN560:1995Gasweldingequipment—Hoseconnectionsforequipmentforwelding,cuttingandalliedprocessesEN29090:1992BSEN29090:1992SpecificationforgastightnessofequipmentforgasweldingandalliedprocessesEN29539:1992BSEN29539:1992Specificationformaterialsforequipmentusedingaswelding,cuttingandalliedprocessesSummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,theENtitlepage,pages2to10,aninsidebackcoverandabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.EUROPEANSTANDARDNORMEEUROPÉENNEEUROPÄISCHENORMEN731May1995ICS25.160.30Descriptors:Weldingequipment,gaswelding,handoperateddevices,blowpipes,equipmentspecifications,specifications,tests,gaspermeabilitytests,marking,technicalnoticesEnglishversionGasweldingequipment—Air-aspiratedhandblowpipes—SpecificationsandtestsMatérieldesoudageauxgaz—Chalumeauxmanuelsaéro-gazàairaspirè—SpécificationsetessaisGasschweißgeräte—HandbrennerfürangesaugteLuft—AnforderungenundPrüfungenThisEuropeanStandardwasapprovedbyCENon1995-03-14.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusastheofficialversions.CENmembersarethenationalbodiesofAustria,Belgium,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.CENEuropeanCommitteeforStandardizationComitéEuropéendeNormalisationEuropäischesKomiteefürNormungCentralSecretariat:ruedeStassart36,B-1050Brussels©1995AllrightsofreproductionandcomunicationinanyformandbyanymeansreservedinallcountriestoCENanditsmembersRef.No.EN731:1995EEN731:1995©BSI07-19992ForewordThisEuropeanStandardhasbeenpreparedbytheTechnicalCommitteeCEN/TC121,Welding,ofwhichthesecretariatisheldbyDS.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyNovember1995,andconflictingnationalstandardsshallbewithdrawnatthelatestbyNovember1995.AccordingtotheCEN/CENELECInternalRegulations,thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.ContentsPageForeword21Scope32Normativereferences33Definitions34Maintypesofaspiration35Descriptionofcomponents66Requirements77Tests88Marking99Codelettersidentifyingthegas(es)used910Instructionsforuse9Figure1—Schematicdrawingofthemixingzone3Figure2—Examplesofblowpipeswithairaspirationintheattachment4Figure3—Examplesofblowpipeswithairaspirationinthenozzle5Figure4—Examplesofblowpipeswithairaspirationintheshank5Table1—TerminologyforFigure1toFigure46Table2—Valves7EN731:1995©BSI07-199931ScopeThisEuropeanSta