Corrosion under insulation (CUI) is one of the most prevalent issues in the process industry. It poses a significant threat to productivity, revenue stream, and most importantly the safety of those on the job site. Roughly 60% of pipe leaks in refinery and plant piping are linked directly to CUI, meaning that finding a detection solution is paramount to your business’ success. As a leader in the inspection industry, Russell NDE would like to offer the following tips when it comes to dealing with corrosion under insulation:

What is CUI?

CUI is any type of corrosion that occurs due to the presence of moisture on the external surfaces of insulated equipment. It can occur on equipment that is in or out of service, as well as equipment in a cyclic service.

What environments are most susceptible to corrosion?

There’s no one environment that guarantees a specific corrosion rate, however, there are conditions that may lead to a higher incidence of CUI. These include:

• Hot or humid environments
• Climates with high precipitation
• Marine environments
• Atmospheres that are conducive to sweating, or contain chlorides and sulphides

How do you prevent CUI?

A key part of avoiding corrosion is diligent inspection. While visual assessment is possible in some cases, it is by far the most expensive and time-consuming as it involves the removal and replacement of insulation. Therefore, finding suitable non-destructive testing methods is extremely beneficial. The Russell Bracelet Probe, for example, can detect corrosion at speeds of up to 5 feet/minute through insulation, fireproofing, and aluminium and stainless-steel jackets.

Once corrosion has been detected, you will be able to repair pipes, tanks, and vessels before significant damage occurs. As a result, you save time, money, and ensure the longevity of your equipment. Contact Russell NDE today and let us put together an inspection plan that suits your needs.