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Oil & Gas: Corrosion Under Insulation

The Dangers of CUI and Protective Coatings to Fight It

Corrosion under insulation (CUI)  — a hidden danger lurking in the bends, flanges, elbows and the underside of pressure vessels/lower course of tanks  — is the number one challenge that oil & gas downstream facilities face when it comes to unplanned downtime and the reduced lifecycle of their assets. 

Thomas Crenshaw, Sherwin-Williams Oil & Gas Project Development Manager, explains the warning signs of CUI and how to help mitigate the risk of hidden corrosion with protective coatings.


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Sherwin-Williams Protective & Marine delivers world-class industry subject matter expertise, unparalleled technical and specification service, and unmatched regional commercial team support to our customers around the globe. Our broad portfolio of high-performance coatings and systems that excel at combating corrosion helps customers achieve smarter, time-tested asset protection. We serve a wide array of markets across our rapidly growing international distribution footprint, including Bridge & Highway, Fire Protection, Flooring, Food & Beverage, Marine, Oil & Gas, Power, Rail, Steel Fabrication, and Water & Wastewater.

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