|Type of Renovation
|Corrosion Under Insulation
|In-service pipelines, piping, pressure vessels, all insulated components.
Corrosion Under Insulation (CUI) is any type of corrosion that occurs due to moisture present on the external surface of insulated equipment. The damage/attack can be caused by one of multiple factors, and can occur in equipment operating at ambient, low, and heated services, depending upon conditions. Moreover, CUI can occur in equipment that is in service, out of service, or in cyclic service. The corrosion itself is most commonly galvanic, chloride, acidic, or alkaline corrosion. If undetected, the results of CUI can lead to leaks and the shutdown of a process unit or an entire facility.
CUI can be inspected by means of special equipment making use of Eddy Current Testing, using the LYFT technique. It enables detection of, and determination of extent of, corrosion under insulations without removing any insulation.