Archco-Rigidon lining gives 15-year protection for Exxon acid tank
Methods
Archco-Rigidon lining gives 15-year protection for Exxon acid tank
Archco-Rigidon's glass-fibre resin system 603D was chosen for the internal protection of a new carbon steel process vessel being incorporated into Exxon Chemical Ltd's petrochemical plant at Fawley. The 52.6m3 vessel contains 77wt per cent sulphuric acid and the 603D lining system is required to provide a minimum of 15 years' protection without service or maintenance.
Archco-Rigidon system 603D is a heavy duty lining formulated from a vinyl ester resin (Derakane 470) with chopped strand glass-fibre mat. The lining is applied to suitably prepared steel(or concrete) substrates to a nominal thickness of 3mm comprising a vinyl ester primer; a silica filled 603D resin base coat approximately 1.5mm thick; two layers of 450gm/m2 chopped strand glass fibre impregnated with 603D resin; a layer of surfacing tissue and 603D resin; and a final sealer coat of 603D waxed resin topcoat.
With its reported resistance to corrosive mineral acids, alkalis and salts at temperatures up to 75°C under immersed conditions and 140°C under fume conditions(dependent on the chemical type and concentration levels), Archco-Rigidon system 603D is already widely used in the chemical process and oil industries.
The contractors for applying the Archco-Rigidon lining were Sprayglass International both companies being subsidiaries of Winn & Coales International. The Exxon process tank was transported to Sprayglass International's Slade Green, Kent,UK, premises where the work was carried out. The interior surface was first grit-blasted to the SA21Ž2 standard before application of system 603D. As part of the contract, surface preparation and coating thickness and integrity testing at random selected locations was carried out by Sprayglass in the presence of Exxon Chemicals' representatives.
Further details available from: Archco-Rigidon Ltd, Denso House, Chapel Road, London SE27 0TR, UK. Tel:Tel: +44 (0) 181 76l 6244; Fax: +44 (0) 181 761 2456.
