Wavelet based approach for detection of material discontinuity in MFL in-line pipeline inspection

Slesarev, D; Intron Plus; Russian Federation

Slesarev, D.; Intron Plus; Russia
Semenov, A.; Intron Plus; Russia

ID: ECNDT-0615-2018
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In real pipeline such defects as corrosion have vast variety of forms and size and differ considerably from standard defects on reference pipes used for calibration and verification of inspection gages. Wavelet decomposition offers an efficient solution for detection and evaluation of defects in MFL non-destructive testing, however it assumes similarity of defects signals to some standard signal. As a result some real detects can be missed. The report shows extension of wavelet based defect detection technique to enable detection of material discontinuities in a broad variety of their size.