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TKY100088TKY!"#$%&'()*+-./01234)*56789:;<!%=>?@A)*BCDEFGHIJKLM@A!NOPQRST?UVWIXYZ[+\]!R^_`a"#$%&STUDYONTHETECHNOLOGYOFULTRASONICTESTINGOFT-K-Y-SHAPEDTUBULARWELDEDCONNECTIONSMADe-zhiSHENXian-huiDUANBinCentralResearchInstituteofBuildingConstructionofMCCAbstractThetechnologyofultrasonictestingonT-K-Y-shapedtubularweldedconnectionsisstudiedinthispaper.Withthecomputeraidedprogramwecandividetheweldseamintodifferenttestareasselecttheprobewithproperlyrefractionangleandlocatethepositionofdefects.PracticeprovedthatwiththismethodwecanimprovethetestingratioofdefectsandcangetwelleffectinthequalitycontrolofT-K-Y-shapedtubularweldedconnections.Keywords:Ultrasonictesting;Tubularconnections;Weld!"#$%&%'()*+-%./01234567897:;<=>?@/ABCDEFGHI+2JGHKLM(NHGHKOGHKPGHKQMRGHKSTTKYKUVWKXYNGZ[I\]+^_`a(bcdefNYg2GHK+bcd^_h[ijV"+klefmnoVNpqrstN