Effect of debris-induced lift-off on magnetic flux leakage inspection results
Debris is present in all pipelines and has the potential to cause debris-induced lift-off in magnetic flux leakage inspection tools. A test apparatus was developed to qualitatively examine the effect of debris-induced lift-off.;The results of this research indicate that debris-induced lift-off has a detrimental effect on magnetic flux leakage data. This increases the potential of pipeline defects being either undersized or missed.;To reduce or eliminate the effects of debris-induced lift-off, the pipeline should be regularly cleaned. This minimizes the occurrence of large accumulations of debris. If it is determined that debris is present in a pipeline, even in small quantities, the pipeline should be cleaned using the appropriate pipeline cleaning method. This improves the quality of the magnetic flux leakage inspection data and resulting integrity assessment.
Networked Digital Library of Theses and Dissertations