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96044 DETERMINING CORROSION DEFECT GEOMETRY FROM MAGNETIC FLUX LEAKAGE PIG DATA

Product Number: 51300-96044-SG
ISBN: 96044 1996 CP
Author: Harvey Haines, J. Bruce Nestleroth, Steven W. Rust, David A. Burgeon
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Accurate determination of the size of corrosion defects is important for determining defect severity. Many magnetic flux leakage pigs employ strong magnetizers and a large number of sensors for improved defect geometry determination methods. Analysis of data from 128 metal loss defects examined repeatedly under different test conditions is used to illustrate pig performance capabilities. An assessment of two inspection variables that can degrade performance is also presented. Keywords: gas transmission pipeline, in-line inspection, magnetic flux leakage, metal loss corrosion
Accurate determination of the size of corrosion defects is important for determining defect severity. Many magnetic flux leakage pigs employ strong magnetizers and a large number of sensors for improved defect geometry determination methods. Analysis of data from 128 metal loss defects examined repeatedly under different test conditions is used to illustrate pig performance capabilities. An assessment of two inspection variables that can degrade performance is also presented. Keywords: gas transmission pipeline, in-line inspection, magnetic flux leakage, metal loss corrosion
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