561SW Offshore Production


THE CHALLENGE: Aging offshore production equipment needed recoating to safeguard its condition and to prolong its life. A coating system was required which would apply and perform well under the typically adverse offshore conditions.

THE SOLUTION: Kevlar® reinforced BIO-DUR 561SW epoxy coating was chosen for this project. This product is specifically designed for wet surface and underwater application to steel in either salt or fresh water.

BIO-DUR 561SW is a 1/1 volume mix product, this is the ideal mix ratio from a practical point of view since minor mixing errors in mixing have the minimum effect on performance. The components were supplied in contrasting colors of white epoxy base and black curing agent to yield a uniform gray mixture.

Epoxies CoatingsThe majority of applications were made with a heated, 1/1 ratio plural component applicator. This equipment preheated the individual components then proportioned and pumped them through separate hoses to a static mixer about 50′ distant from the mixing equipment. Once mixed, the product was pumped to a pressure pad applicator used by a diver to spread the product on the prepared steel.

The steel surfaces were prepared for coating by high pressure water blasting. The intact existing coating adjacent to damaged or corroding areas was simply high pressure water blasted prior to application of the BIO-DUR 561SW

THE RESULT: Application by pressure pad was highly effective for coating the large surface area. The BIO-DUR 561SW products cured well overnight and formed a tough, tightly adherent protective coating over the structure. The freshly applied coating was resistant to removal by wave action from the moment of application and suffered no damage before fully curing.

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ASME PCC-2 Spool Test Summary

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24 Inch 90 Degree Elbows 42 Inch Heat Exchanger-740 PSI-After Repairs 12 Inch Natural Gas 720 psi PRT PowerSleeve 1 8 Inch Natural Gas 940 PSI Before Repair-Detail