PIPELINE INSPECTION-TOOL SPEED ALTERS MFL SIGNALS

D. L. Atherton, C. Jagadish, P. Laursen, V. Storm, F. Ham, B. Scharfenberger Queen's University Kingston, Ont. Detailed measurements show that pipeline in-line inspection-tool speed can cause significant reduction in defect-induced magnetic flux leakage (MFL) signals. This reduction must be taken into account in any attempt to measure defect penetration to 10% accuracy as opposed to simply detecting anomalies.

Jan 29th, 1990
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