Corrosion under insulation (CUI) creates a pervasive and versatile challenge to the integrity of insulated equipment, but non-destructive inspection can help to avoid undesirable CUI surprises

Corrosion under insulation (CUI) has been occurring ever since industry started insulating equipment. However, most of the CUI reported until the 1970s developed in stainless steel due to stress-corrosion cracking. At that time, with limited insulation, carbon-steel equipment did not develop significant CUI [ 1]. S
Source: NDT