A brief review of the most recent developments in long-range ultrasonic guided wave testing of pipeline was presented. The benefits of phased array focusing of guided waves were discussed and same sample results were shown to illustrate the increased sensitivity to discontinuities that is obtained from focusing. The benefits of using both torsional and longitudinal guided wave modes for testing were discussed. Experimental results show that neither torsional nor longitudinal modes, by themselves, can find all discontinuities. If, instead, both modes are used for testing, detection probability increases and a level of redundancy are added. Finally, it was shown that circumferential displacement profiles, obtained using phased array focusing, can be used to identify and test welds. Additionally, it was shown that circumferential displacement profiling can be used to locate the circumferential location of a discontinuity.
New directions in guided wave pipe testing
Neue Möglichkeiten der Pipelineprüfung mit geführten Schallwellen
Materials Evaluation ; 65 , 4 ; 375-378
2007
4 Seiten, 3 Bilder, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
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