Corrosion Under Insulation


Case Study - CUI

Case Study 8: CUI


Corrosion under insulation (CUI) is a severe form of localized external corrosion which occurs in carbon and low alloy steel pipe that has been insulated. This form of corrosion occurs when water collects or is trapped in the insulation. The pipe material begins to corrode as it is exposed to water and oxygen from the air. CUI is common in refineries and process plants that typically operate equipment at elevated temperatures and can quickly lead to structural failure which can have catastrophic consequences. Case Study 8 describes how GUL's guided wave system can successfully detect CUI in pipes.