+1 vote
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1 Answer

+1 vote
answered Aug 19, 2014 by cchang219 (2,310 points)

Tendons should be equipped with a three layer polyethylene (TLPE) coating system.

The tendon length adjustment joints should be equipped with a thin film fluoropolymer coating system. Tendon bottom extensions should be equipped with a TSA coating system. Tendon couplings should be uncoated.

Cathodic protection should be provided by bracelet anodes clustered adjacent to coupling boxes. The tendons should be electrically isolated from the TLWP hull and the anchor piles by flex-joints.

Top tension production risers should be equipped with a 5-layer polypropylene thermal insulation system. The upper crossover joint and tension joint should be equipped with a thermal sprayed aluminum (TSA) coating system. The splash zone joint should be equipped with a neoprene coating.

Top tension water injection risers and drilling riser should be equipped with a thermal sprayed aluminum (TSA) coating system. The splash zone joint should be equipped with a neoprene coating.

Top tension risers should be electrically continuous with the TLWP hull and should receive cathodic protection from hull mounted anodes and anodes mounted on the guide base assemblies.

The cathodic protection system for tendon and the production and water injection risers should be designed in accordance with DNV RP-B401 and ISO-15589-2 for a service life of 25 years.

The cathodic protection system for the drilling riser should have a design life of 10 years. The hull cathodic protection design should include provisions for cathodic protection of future top tension risers (TTRs).

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