Corrosion Under Insulation

Learn how to mitigate the effects of CUI

CUI, learning, nace paper, pipe, corrosion, industrial, offshore, marine

Protect your investment and people

Corrosion Under Insulation (CUI) is one of the industrial sector’s greatest challenges with respect to materials. It’s a major issue that needs to be addressed from the design phase until decommissioning of equipment. Insulation is part of this system challenge. By selecting the best available solution, the effects of CUI could be mitigated. But first this:

What are the effects of CUI?

In the industrial sector and especially when you’re working with hazardous, explosive or flammable materials, the potential consequences of uncontrolled CUI can be catastrophic. CUI on pipes or equipment may result in leaks, which again could catch fire, explode or cause pollution, all with significant impact on safety and the environment. So, CUI deserves your highest attention!


total costs of corrosion (NACE)


of pipe maintenance costs are due to CUI


Of the CUI incidents occurs on pipes (ExxonMobil)

The risk of corrosion under insulation is considered high in the temperature range 50 – 175°C (122 – 347°F) and extreme when in cyclic temperature service between -20 and 320°C (-4 – 608 °F)
SHELL specification: DEP September 2011