Russia's Transneft Diascan has modified the combined magnetic ultrasonic defectoscopes of its inspection tool for two pipeline sizes: 20-DKK and 28-DKK.
Russia's Transneft Diascan has modified the combined magnetic ultrasonic defectoscopes of its inspection tool for two pipeline sizes: 20-DKK and 28-DKK.
The first inspection complex provides for the inspection of pipelines with the diameter of 530 mm using an ultrasound (WM, CDL and CDS) and magnetic (MFL) measuring system. The firm said in a statement that the characteristics were improved in the course of the revamping:
• measuring system resolution capacity increased more than two-fold due to a greater number of ultrasonic WM sensors;
• the minimum sizes of pipe wall defects of the scratch-mark type to be detected decreased by 2.5 times in width and by 1.5 times in depth;
• power consumption of electronic equipment was halved.
The second defectoscope is meant to inspect pipelines with 720 mm and 820 mm diameters. The measuring system resolution capacity rose 1.6 times after the modernization due to a higher number of ultrasonic WM sensors. The minimum sizes of detectable pipe wall defects of the scratch-mark type decreased by 2.5 times in width and by 1.5 times in depth; the power consumption of electronic equipment is down 25%.
During the comprehensive acceptance testing, both devices showed good resistance to climate and mechanical impact; the testing also proved the operational characteristics of defect detection and measurement errors to be compliant with the technical specification.
Source: Pipeline ME
