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Corrosion under insulation (CUI) most often occurs in temperatures between 50°C and 175°C. But it can be found in lower temperatures in areas with high relative humidity – the so-called ‘sweating’ pipe syndrome. As many assets undergo temperature fluctuations, as a result of the process itself or before and after shutdowns, the most reliable CUI coatings are able to offer protection across a wide range of temperature.
When it comes to high heat applications and the prevention of CUI, three coating types have historically been used:
All these systems have pros and cons. With Hempel, our Inorganic copolymer coating has all the advantages and none of the drawbacks – Versiline CUI 56990.
Formulated to deliver optimal performance across a wide range of conditions, Versiline CUI 56990 gives you unrivalled protection against CUI, even if temperatures rise or fall above those predicted. It can withstand temperatures from -196°C to 650°C and delivers exceptional resistance to micro-cracking.
Versiline CUI 56990 is also extremely easy to apply and dries quickly to ensure high productivity onsite and in the yard. And it’s tough enough so it won’t get damaged easily during transportation or construction.
Designed for use in severe corrosion environments, Hempaprime CUI 275 delivers excellent protection against CUI in temperatures from cryogenic to 275°C.
Formulated for high productivity on new construction, maintenance and repair, it has an extremely short overcoating interval and ensures excellent crack resistance even if applied at high DFTs. This makes it ideal for projects where high productivity and predictable ISO-certified long-term performance are required.
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