Transneft Diascan has upgraded the ultrasonic defectoscope for in-line inspection of 28-inch pipelines. The newly upgraded in-line 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 defects found in dents. The upgraded device is equipped with a new WM sensor carrier with enhanced flexibility of the runners 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 ensures that the sensors are placed closer to each other along the circumference.
The upgrading operations took place from April 2016 to November 2018. The defectoscope underwent acceptance testing at Transneft Diascan’s test ground as well as within a section of an operating oil pipeline.
Earlier, Transneft Diascan had upgraded a similar defectoscope for inspection of 40- to 48-inch pipelines.