Inspection Solution for Water-Filled Vertical Cavern Storage Lines

Solution for corrosion and wall thickness measurement, detection of ovality and weld misalignment

After 10 years, a gas storage operator had to inspect their 150m (492ft), 4”-24” vertical casing pipes due to regulations. They were looking for more reliable and efficient technologies regarding coverage, resolution and accuracy. The top parts of the pipes were air-filled, the lower parts were filled with water. The operator needed to know the condition of the lines in terms of ovality, weld misalignment and internal and external corrosion, especially at the welds.