A refinery in Port Arthur, Texas contacted Mascoat in fall 2012 to help solve the Corrosion Under Insulation (CUI) problem they were having on one of their #6 fuel oil storage tanks. Port Arthur’s environment is extremely harsh for refineries due to the extreme humidity, heavy rainfall and having the refinery connected to salt water. This mixture creates a perfect storm for CUI on a tank that operates at 150˚F (65.5˚C).


The tank's dimensions are 119 ft x 40 ft (36.3 m x 12.2 m), so there is potential to lose a great deal of energy if the tank is not properly insulated. Prior to Mascoat being installed, there was no insulation on the roof. With almost 12,000 ft2 (1,115 m2) of surface area, this refinery was losing millions of BTU’s an hour.


In November of 2012, a contractor hired by the refinery installed 80 mils (2 mm) of Mascoat Industrial–DTI to the roof in four 20-mil (0.05 mm) coats and 60 mils (1.5 mm) in three 20-mil (0.05 mm) coats to the sidewalls of the tank. After completion of the application, the refinery is not only getting the insulation value that they expected per Mascoat’s thermal analysis report (shown below), but they were also able to save a tremendous amount of money by taking the tank out of their CUI program.