The Effects of Rlux Leakage Magnetizer Velocity on Volumetric Defect Signals
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
The inspection requirements of the hundreds of thousands of miles of pipeline worldwide necessitates the use of high inspection velocities. Unfortunately, high inspection velocities can compromise the ability to detect and characterize defects [1,2]. These velocity effects need to be quantified in order to have a complete understanding of MFL inspection capabilities. This paper presents an explanation and a summary of these effects based on two and three dimensional finite element analysis and experimental results. Selected finite element and experimental results are also shown. The specific problem addressed is large diameter (>12 inches), ferromagnetic steel pipe material and inspection velocities up to 10 miles per hour. The defects are volumetric metal loss generally caused by corrosion.