BS 1723-4-1988 Brazing.Part 4 Methods for specifyi

LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSIBRITISHSTANDARDBS1723-4:1988Brazing—Part4:MethodsforspecifyingbrazingprocedureandoperatorapprovaltestingUDC621.791.36LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSIBS1723-4:1988ThisBritishStandard,havingbeenpreparedunderthedirectionoftheWeldingStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton30December1988©BSI03-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceWEE/19Draftforcomment86/77418DCISBN0580167216CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheWeldingStandardsCommittee(WEE/-)toTechnicalCommitteeWEE/19,uponwhichthefollowingbodieswererepresented:BNFMetalsTechnologyCentreBritishAssociationforBrazingandSolderingBritishNon-FerrousMetalsFederationElectricitySupplyIndustryinEnglandandWalesHeatingandVentilatingContractors’AssociationInstituteofRefrigerationJointIndustryBoardforPlumbingMechanicalEngineeringServicesinEnglandandWalesPlumbingTradesUnionSocietyofBritishAerospaceCompaniesLimitedWeldingInstituteCooptedmemberAmendmentsissuedsincepublicationAmd.No.DateofissueCommentsLicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSIBS1723-4:1988©BSI03-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiSection1.General1.1Scope11.2Definitions1Section2.Methodforspecifyingapprovaltestingofbrazingproceduresforbrazingvariousparentmaterials2.1General32.2Itemstobespecifiedinabrazingproceduretest32.3Changesaffectingapproval42.4Extentofapproval42.5Testsamples52.6Examinationandtesting52.7Statementofresults5Section3.Methodforspecifyingapprovaltestingofbrazingoperatorsworkingtoapprovedbrazingprocedures3.1General63.2Informationtobegiventothebrazingoperator63.3Itemstoberecorded63.4Changesnotaffectingapproval63.5Extentofapproval63.6Testsamples63.7Submissionoftestsample73.8Examinationandtesting73.9Statementofresults7Section4.Methodforspecifyingapprovaltestingofbrazingoperatorswhenbrazingprocedureapprovalisnotrequired4.1Informationtobegiventothebrazingoperator84.2Reapprovalofthebrazingoperator84.3Testsamples84.4Submissionoftestsample84.5Assessmentoftestsamples84.6Statementofresults8AppendixARecommendedrecordofapprovaltestofbrazingprocedure:BS1723-410AppendixBRecommendedrecordofapprovaltestofbrazingproceduretestresults11AppendixCRecommendedrecordofbrazingoperatorapproval12AppendixDFundamentalbrazingpositions13AppendixERecommendedrecordofstatementofcontinuityofbrazingoperatorapproval14Figure1—Testsampleformanualtorchbrazing9Figure2—Horizontalposition13Figure3—Verticalposition,downflow13Figure4—Verticalposition,upflow14Figure5—Verticalposition,horizontalflow14PublicationsreferredtoInsidebackcoverLicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSIBS1723-4:1988ii©BSI03-1999ForewordThisPartofBS1723hasbeenpreparedunderthedirectionoftheWeldingStandardsCommittee.BS1723wasoriginallypublishedasonestandard,butthisrevisionhasbeendividedintofourPartsasfollows:—Part1:Specificationforbrazing;—Part2:Guidetobrazing;—Part3:Methodsfornon-destructiveanddestructivetesting;—Part4:Methodsforspecifyingbrazingprocedureandoperatorapprovaltesting.Thisformathasallowedtheaspectscoveredintheguide(seeBS1723-2)tobewidenedandapprovals(bothprocedureandoperator)andmethodsoftestingareincludedforthefirsttime.Part4ofthestandardincludesapprovaltestingofbrazingoperatorsandprocedureapprovalforbrazingvariousparentmaterials.Thelatterhavingabearingontheformer.Thebrazingoperatortestapprovalalsocallsuponthenon-destructiveanddestructivetestsspecifiedinBS1723-3.ThisPartofBS1723coversthefollowingapprovalprocedureswhichareamatterforagreementbetweenthecontractingpartiesatthetimeofplacingtheorder:a)approvaltestingofbrazingproceduresforbrazingvariousparentmaterials;b)approvaltestingofbrazingoperatorsworkingtoapprovedbrazingprocedures;c)approvaltestingofbrazingoperatorswhenbrazingprocedureapprovalisnotrequired.Brazingoperatorswhoworkon,andsatisfactorilyproduce,samplesasrequiredina)shouldbeconsideredasapprovedinaccordancewiththerequirementsofb)forthesametestconditionswithoutundergoingfurthertests.Whennon-destructivetestingisusedfortheexaminationoftestbrazes,theacceptancelevelsshouldbesetsothatthesingleormultipledefectsareinlinewiththosethatarenon-rejectableinthemanufacturedcomponenttowhichthetestrelates.Thesizeanddistributionofdefectsinbrazedjointsarenotuniversalincharacterandacceptanceorrejectionwilldependuponthecriteriasetfordefectsize,typeanddistributionasagreedbetweenthecontractingparties.AsthisPartofBS1723isbasedonrequirementstobeagreedbetweenthecontractingparties,ithasbeenpublishedasamethodforspecifyingandnotasaspecification.ForthisreasonitisnotappropriateforittobeclaimedthatabrazingprocedureorabrazingoperatorhascompliedwiththisPartofBS1723.AclaimofcompliancecanonlybemadeagainstthecriteriaproceduresagreedinaccordancewiththisPartofBS1723.Ithasbeena