Operators and owners in the Norwegian petroleum sector shared their knowledge in this activity. 


A review of data in the incident register from 1998 to 2016 showed that corrosion under insulation (CUI) is a substantial contributor to major accident risk. 

The PSA is working assiduously to improve our risk-based follow-up of activities. Follow-up of corrosion under insulation in the design engineering and operation of offshore installations and onshore facilities is a priority topic. 

We have previously investigated leaks from pipes associated with CUI, such as a steam leak in 2012, a hydrogen leak in 2016, and naphtha leaks in 2017 and 2020. 

Through this survey, we are seeking to examine the practices employed in the industry for managing CUI risk. We also wanted to look at the potential for identifying best practices and to see how standards are incorporated. 

Objectives and results 

Our objective was to identify CUI activities with regard to hazard and accident risk. We have also shed light on risk elements, compensatory measures and maintenance management among operators in the petroleum industry, as well as identifying which standards are applied. 

The report is in English, with a Norwegian summary.