FIELD: defectoscopy.
SUBSTANCE: use: for flaw detection of inner protective-insulating coatings, to avoid uncontrolled opening of protective coatings and damage to pipe wall. Essence of the invention consists in the fact that the method of scanning flaw detection of internal protective-insulating coatings of pipelines consists in measurement of leakage currents between an internal medium of the surveyed pipeline and a pipe wall, when voltage is supplied to corresponding electrodes of measuring device of in-tube device from built-in voltage source, in order to localize defects along pipeline section, sensitive elements of measuring device of in-pipe instrument are distributed along measuring sectors, and are as close as possible to internal surface of surveyed pipeline.
EFFECT: technical result is possibility of accurate assessment of dimensions of detected defects.
7 cl, 12 dwg
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