BS 1723-3-1988 Brazing -Part 3 Methods for non-des

LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI—Part3:Methodsfornon-destructiveanddestructivetestingUDC621.791.36LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI07-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceWEE/19Draftforcomment86/77417DCISBN0580167208CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbytheWeldingStandardsCommittee(WEE/-)toTechnicalCommitteeWEE/19,uponwhichthefollowingbodieswererepresented:BNFMetalsTechnologyCentreBritishAssociationforBrazingandSolderingBritishNon-FerrousMetalsFederationElectricitySupplyIndustryinEnglandandWalesHeatingandVentilatingContractors’AssociationInstituteofRefrigerationJointIndustryBoardforPlumbingMechanicalEngineeringServicesinEnglandandWalesPlumbingTradesUnionSocietyofBritishAerospaceCompaniesLimitedWeldingInstituteCooptedmemberAmendmentsissuedsincepublicationAmd.No.DateofissueCommentsLicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI07-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiiSection1.General1.1Scope11.2Definitions11.3Generalprinciples11.4Itemstobeagreedanddocumented21.5Separationandpreparationofthetestpiece31.6Samplingprocedures4Section2.Non-destructivetestingofbrazedjoints2.1General52.2Visualandaidedvisualexaminationofbrazedjoints52.3Prooftestingofbrazedjoints62.4Pressureandvacuumtestingforleaksinbrazedjoints72.5Penetrantflawdetectionappliedtobrazedjoints82.6Ultrasonicexaminationofbrazedjoints112.7Radiographicexaminationofbrazedjoints122.8Thermographictestingofbrazedjoints14Section3.Destructivetestingofbrazedjoints3.1General163.2Tensileandsheartestingofbrazedjoints163.3Peeltestingofbrazedjoints233.4Stressrupturetestingofbrazedjoints243.5Impacttestingofbrazedjoints293.6Bendtestingofbrazedjoints293.7Hardnesstestingofbrazedjoints323.8Metallographicexaminationofbrazedjoints323.9Corrosiontestingofbrazedjoints33Section4.Testingofbrazingfillermetals4.1General364.2Preparationofthetestsample364.3Chemicalcompositionofbrazingfillermetal364.4Carbonandspattertestforbrazingfillermetals36Section5.Brazingfillermetalmeltingcharacteristics5.1General385.2Preparationofthetestsamples385.3Procedure385.4Differentialthermalanalysis(DTA)385.5Crucibleballingtest(flowpoint)40Section6.Initialdeterminationofflowcharacteristicsandwettabilityofbrazingfillermetals6.1General416.2Flowcharacteristicsandwettabilitytest416.3Jointfillingandmetallurgicalcharacteristicsofhightemperaturebrazingfillermetals44AppendixABrazingcategories46AppendixBDefectsinbrazedjoints46AppendixCExampleofdatasheetfortestpiecepreparation49LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI07-1999PageAppendixDRecommendationsforoperators50AppendixEExampleofnon-destructiveanddestructivetestingdatasheetforreportingtestresults50Figure1—Directechotechnique9Figure2—Indirectechotechnique10Figure3—Principlesofsheartestingbrazedjoints17Figure4—TypeIsheartestpiecedimensions18Figure5—TypeIIsheartestpiecedimensions19Figure6—Single-lapsheartestpiece20Figure7—Simpletensiletestpiece21Figure8—Tensiletestpiecedimensions22Figure9—Peeltestpiece24Figure10—Stressrupturetestpieces25Figure11—Impacttesting27Figure12—Freebendtest30Figure13—Supportedbendtestsforlapandbuttjoints31Figure14—Simplebendorflexingtest31Figure15—Testpieceforgaseousandwetcorrosiontesting35Figure16—Testpieceforliquidorliquidmetalcorrosiontesting35Figure17—Testpieceforgaseouscorrosiontesting35Figure18—Checkfortheabsenceofsplashing37Figure19—DTAhead39Figure20—Typesoftestpieceforflowcharacteristicsandwettabilitytest42Figure21—Wedgegaptestpiece45Figure22—Incompleteflowatfilletandincapillary46Figure23—Longitudinalcracks47Figure24—Transversecracks47Figure25—Porosityandinclusions48Figure26—Erosion48Figure27—Excessivefillermetalflow49Figure28—Incorrectcomponentassembly49Table1—Brazingconditions38Table2—Brazingqualitycategory46Publicationsreferredto52LicensedCopy:opu-jwb94opu-jwb94,OpenUniversityTheJISC,01November2004,UncontrolledCopy,(c)BSI©BSI07-1999iiiForewordThisPartofBS1723hasbeenpreparedunderthedirectionoftheWeldingStandardsCommittee.ItwasoriginallypublishedasonestandardbutthisrevisionhasbeendividedintofourPartsasfollows:—Part1:Specificationforbrazing;—Part2:Guidetobrazing;—Part3:Methodsfornon-destructiveanddestructivetesting;—Part4:Methodforspecifyingbrazingprocedureandoperatorapprovaltesting.Standardsrelatingtoweldedconstructionsinvariousbranchesofengineeringgenerallyincluderequirementsforcertainteststobecarriedout.ThisPartofBS1723will,forthefirsttime,extendtheapplicabilityofdestructivean