BS 1723-1-1986钎焊.第1部分钎焊规范

LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI—Part1:SpecificationforbrazingUDC621.791.36LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI02-1999Firstpublished,asBS1723,March1951FirstrevisionMarch1963Firstpublished,asBS1723-1,February1986ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceWEE/19Draftforcomment84/77328DCISBN058014772XCommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheWeldingStandardsCommittee(WEE/-)toTechnicalCommitteeWEE/19uponwhichthefollowingbodieswererepresented:BNFMetalsTechnologyCentreBritishAssociationforBrazingandSolderingBritishNon-FerrousMetalsFederationElectricitySupplyIndustryinEnglandandWalesHeatingandVentilatingContractors’AssociationJointIndustryBoardforPlumbingMechanicalEngineeringServicesinEnglandandWalesMinistryofDefencePlumbingTradesUnionSocietyofBritishAerospaceCompaniesLimitedWeldingInstituteCooptedmemberAmendmentsissuedsincepublicationAmd.No.DateofissueCommentsLicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI02-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordii1Scope12Definitions13Informationandrequirementstobeagreedandtobedocumented14Parentmaterials25Processes26Brazingconsumables27Jointdesign28Jointpreparation39Jigging310Brazingprocedureapproval311Qualitycontrol312Testingprocedure313Acceptancecriteria314Requirementsspecifictothemethodofbrazing4PublicationsreferredtoInsidebackcoverLicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI02-1999ForewordThisPartofBS1723hasbeenpreparedunderthedirectionoftheWeldingStandardsCommitteeandsupersedesBS1723:1963whichiswithdrawn.BS1723wasoriginallypublishedasonestandardbutthisrevisionhasbeendividedintofourPartsasfollows:—Part1:Specificationforbrazing;—Part2:Guidetobrazing;—Part3:Destructivetestingandnon-destructiveevaluation(inpreparation);—Part4:Procedureandoperatorapproval(inpreparation).Thisformathasallowedtheaspectscoveredintheguide(seeBS1723-2)tobewidenedandapprovals(bothprocedureandoperator)andmethodsoftestingareincludedforthefirsttime.Thisisthefirstrevisioninwhichmetricunitshavebeenusedthroughout.IthasbeenassumedinthedraftingofthisBritishStandardthattheexecutionofitsprovisionsisentrustedtoappropriatelyqualifiedandexperiencedpeople.ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofacontract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.CompliancewithaBritishStandarddoesnotofitselfconferimmunityfromlegalobligations.SummaryofpagesThisdocumentcomprisesafrontcover,aninsidefrontcover,pagesiandii,pages1to6,aninsidebackcoverandabackcover.Thisstandardhasbeenupdated(seecopyrightdate)andmayhavehadamendmentsincorporated.Thiswillbeindicatedintheamendmenttableontheinsidefrontcover.LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI02-199911ScopeThisPartofBS1723specifiesrequirementsforthebrazingofjointsbetweenanyparentmaterialsthatarecapableofbeingbrazedbyoneoftheprocesseslistedinclause5.Inadditiontothedefinitiverequirementsgiven,italsorequirestheitemsdetailedinclause3tobedocumented.Forcompliancewiththisstandard,boththedefinitiverequirementsandtheseparatelydocumentedrequirementshavetobesatisfied.NOTEThetitlesofthepublicationsreferredtointhisstandardarelistedontheinsidebackcover.2DefinitionsForthepurposeofthisBritishStandardthedefinitionsgiveninBS499-1applytogetherwiththefollowing.2.1brazingfillermetalthemetaladdedduringbrazing(orpre-appliedduringpreparation)whichistoflowbetweenthefayingsurfaces(see2.2)andcompletethejoint2.2fayingsurfaces1)thesurfacesthataretobejoinedinanassembly2.3fillet1)themeniscusformedbythebrazingfillermetalatajointedge2.4witnessevidenceofbrazingfillermetalflowasseenatajointedgeremotefromthepointofapplication2.5continuousfilletafilletwithnobreaksorporesvisibleatlowmagnification(upto×5)2.6partialfilletafilletwithporesordiscontinuitiesNOTEAspecificationmaylimitthemaximumlengthofanyallowablediscontinuityorpore,individuallyorintotal.2.7percentagefillthepercentageofnominaljointthatisfilledwithbrazingfillermetalasjudgedbyanagreednon-destructivetestmethodNOTESeeBS1723-32).2.8lapjoint1)overlappingfayingsurfaces2.9buttjoint1)abuttingfayingsurfaces2.10preformbrazingfillermetalfabricatedintoasuitableshapeforpre-placementNOTEWire,foil,plasticbondedsheetandadhesivetapearesuitableformanufacturingpreforms.2.11loadinggroove(pre-placementgroove)aformedgroovetolocatepre-placedbrazingfillermetal2.12brazinggaptheseparationbetweenfayingsurfacesatthebrazingtemperature2.13fit-uptheclearancebetweent