UT ‘pinpoint’ position wall thickness data is usually collected on site both for cross-correlation to BEM™ as a quick and easy additional data source. UT has limitations with rough, uneven, dirty or coated surfaces. It also has some shortfalls when testing Cast Iron and Ductile Iron assets for thickness readings, due to the physical and metallurgic properties of these material types.
An ultrasonic thickness gauge combines measurement features with data acquisition and output capabilities for applications involving pipes, tanks, and other metal structures subject to internal corrosion or erosion. It measures and displays the thickness of the metal part and its coating using a ‘single backwall echo’.