METHOD OF ELECTROMAGNETIC-FIELD FLAW DETECTION OF FERROMAGNETIC PIPES Russian patent published in 2005 - IPC

Abstract RU 2247977 C1

FIELD: non-distractive testing.

SUBSTANCE: method comprises magnetizing pipe by transverse permanent magnetic field and probing pipe with the use of a set of vortex-current and magnetic sensitive units. The signals from the sensitive units are divided into four groups depending on the type of converter and signal amplitude. The type of defect and its depth can be judged from the signal groups obtained.

EFFECT: enhanced reliability of detection.

1 dwg, 1 tbl

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RU 2 247 977 C1

Authors

Fedosenko Ju.K.

Dates

2005-03-10—Published

2004-01-26—Filed