CUI is a significant problem for industrial plants. On the surface the condition of the object may look fine; underneath there is often corrosion which leads to problems such as leaking. For this reason, CUI inspection is essential.

One method of CUI inspection is a screening technology. Screening is not a detailed inspection but it can quickly detect corrosion under insulation. Once CUI is detected by the screening process, a detailed inspection can be carried out. This is an efficient way to inspect CUI.