Case Study

Extended Service Life for Coarse Water Strainers



Client  Oil & gas industry, UK.   Application Date  2004.   Scope of Work  The initial problem with the coarse water strainers was identified over 20 years ago. During the “bloom” period they clog up with the algae growth. So, several times a day, the basket is lifted in and out for cleaning. This regular movement within the strainer causes mechanical damage over a period of time at the location points at the bottom and top of the vessel. Corrocoat offered a solution of inserting stainless steel impact rings at the top and bottom of the vessel to take the majority of the mechanical damage and coat the rest of the internals with a corrosion and abrasion resistant lining. The initial life expectancy of the strainers was 2-3 years before they came out of service for maintenance. With the Corrocoat Corrosion Engineering Retrofit package, the strainers are lasting in excess of 12 years before any maintenance is required.   Products  Polyglass VEF with top coat of Corrocoat Armagel.   Substrate Carbon steel.   Coating System  • Grit blasted internally to Sa 2 ½. • Applied Polyglass VEF to minimum dft of 1mm. • Applied Corrocoat Armagel to total dft of 1.5mm, into flange rebates and finish flat. • Thickness checked and spark tested at 19kV.  

Filter Vessel on Arrival at Workshop - Vessel End Externals and Bolt Holes - Completed Vessel Internals

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