CASE STUDY

Pre-load Tanks Refurbishment

Client: Seadrill

Industry: Offshore

Scope: Pre-load Tanks Refurbishment

Date: January 2014

Location: Mexico

Products: RS 500P & RA 500M

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OVERVIEW

Two pre-load tanks (tank 44 & 46) on Seadrill’s West Defender platform required a full refurbishment as the existing soft coating systems (Eureka) had failed and were showing signs of severe corrosion.

CHALLENGE

Removal of existing Eureka coating. Grit blasting was not permissible/feasible, therefore an alternative surface preparation method had to be specified. Working within a restricted timeframe also added to the difficulties of this project.

SOLUTION

Both pre-load tanks (44 & 46) were specified with the exact same surface preparation method and coatingsystem. The original soft coating was initially scrapped
and degreased before UHP water blasting was carried out @ 30,000psi. One stripe coat of Epo-chem™ RS 500P was applied followed by one full primer coat of solvent-free, rust tolerant epoxy Epo-chem™ RS 500P @ 100µ DFT. The coating application was completed by applying one coat of Epo-chem™ RA 500M solvent-free, glassflake epoxy topcoat @ 250µ DFT.

OUTCOME

The Eureka coating was successfully removed. The tanks were also completed with no delays to the project and much quicker than was anticipated by the client. The Chemco system and the speed of the contract was to the satisfaction of all concerned.

BENEFITS

• Solvent-free
• No grit blasting
• Reduced H&S and Fire Precaution
• Reduced overall cost and downtime
• Reduced cost of plant and equipment
• No humidity or dew point restrictions
• No disruption to other nearby work (hot)

internal tank walls showing heavy rust

After Surface Preparation

internal tank walls painted in grey

Completed Application

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