The automatical electromagnetic (eddy-current) scanning flaw detector ASD “Vikhr” aimed to nondestructive inspecting of linear part of main steel gas pipeline during maintenance is described.It should be noted that existing convenient scanning flaw detectors based on magnetic flux leakage (MFL) and ultrasonic nondestructive techniques can not provide reliable detectability of stress-corrosion cracks and corrosion of metal is major hazard for exploited steel pipelines.In order to detect defects in steel pipe the differential eddy-current transducers, having high sensitivity and value of information, are used. To real-time inspecting steel pipeline the scanning flaw detector has mechanical scanning system, built-in single-board computer (SBC) and software for measured signal analyze and representation, as well as modern wireless communication equipment for remote data exchanging with inspector’s computer.Measured information is represented in display of inspector’s computer as graphic 2D-scan proportional to linear sizes of inspected steel pipeline surface simplify visual analysis and localization of most damaged defects.The scanning flaw-detector ASD “Vikhr” measured signals processing software has many additional maintain functions providing operator to inspect measured signals of eddy-current transducers particularly in the certain area of steel pipe having defects. This is allow verifying up serviceability of scanning flaw-detector ASD “Vikhr” software, as well as interpreting and editing data measured in hard conditions, that is generally increase the reliability of steel pipeline inspection results.
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