Electromagnetic acoustic transducer (emat) weld inspection

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 31/12 (2006.01) G01N 29/04 (2006.01) G01N 29/24 (2006.01)

Patent

CA 2492668

A method and an assembly for inspecting welds between welded tubular ends comprises arranging a series electromagnetic acoustic transducer (EMAT) (7a, 8a, 7b, 8b) assemblies in circumferential direction adjacent to an inner and/or outer surface of at least one of the welded tubular ends and inducing the EMAT assemblies to transmit sequentially or simultaneously acoustic shear wave signals towards the weld and to detect the shear waves reflected by and/or passing through the weld while the EMAT assemblies are maintained in a substantially fixed position relative to the weld such that at least a substantial part of the weld is scanned by the EMAT assemblies instantly after the weld is made.

L'invention concerne un procédé et un ensemble pour inspecter des soudures entre des extrémités tubulaires soudées. Ledit procédé comprend les étapes suivantes : disposer des ensembles de transducteurs acoustiques électromagnétiques en série (EMAT) dans un sens circulaire adjacent à une surface intérieure et/ou extérieure d'au moins une extrémité tubulaire soudée, induire lesdits ensembles EMAT à transmettre de manière séquentielle ou simultanément des signaux d'onde de cisaillement acoustiques vers la soudure et détecter les ondes de cisaillement réfléchies par et/ou passant à travers la soudure, lorsque les ensembles EMAT sont maintenus dans une position sensiblement relative à la soudure, de sorte qu'au moins une partie importante de la soudure est balayée par les ensembles EMAT instantanément après la fabrication de la soudure.

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