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Transneft Diascan upgrades 28 in. UT tool

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World Pipelines,

Transneft Diascan has upgraded its ultrasonic flaw detector for inline inspections of 28 in. pipelines. The newly upgraded inline inspection device was marked as 28.USD.04, which means that it belongs to the 4th generation of ultrasonic defectoscopes.

The key purpose of the upgrade was to improve the detectability of flaws found in dents. The upgraded device is equipped with a new WM sensor carrier with enhanced runners’ flexibility on which adaptive bars with sensors on moving suspension elements are installed. This allows the sensors to be properly in contact with the pipe’s surface at the place of deformation within dents and buckles, thus making it possible to detect and measure such defects as scratch marks, metal loss and lamination located within dents and buckles. It should also be noted that the number of WM sensors has been increased 1.8-fold on the new carrier, which decreases the distance between sensors along the circumference.

The upgrading was carried out from April 2016 to November 2018. The flaw detector underwent acceptance testing at Transneft Diascan’s test ground as well as within a section of an operating oil pipeline.

Earlier, Transneft Diascan upgraded a similar defectoscope for inspection of 40 to 48 in. pipelines.

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