Industrial Insulation Standard

Corrosion Protection Under Insulation

CINI 7.2.01 | 2016-01-01

In practice it appears that water and moisture can penetrate into the insulation system. Insulated equipment and piping can be attacked by Corrosion Under Insulation (CUI), especially in the temperature range between -20°C and +175°C (-5°F and +350°F) or with cyclic operating temperatures.

Prevention or mitigation of corrosion under insulation (CUI) is only possible by a system-approach.
In all phases attention needs to be paid to CUI prevention, e.g. design, construction, paint & coating works, application of the insulation system, inspection and maintenance. Equipment and piping sections like nozzles, supports etc. shall be designed and maintained such that ingress of water into the insulation system is prevented.

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