Sectional Steel Tank

These scans show a typical sectional, steel, potable water retaining structure. The internals had been painted with Bitumen which had reached the end of its useful life due to severe corrosion, low film build and subsequent deterioration. The structure was also leaking from some of the joints where the panels were bolted together.

All internal surfaces to be re-lined, were prepared by means of dry abrasive blasting.This process removes all existing Bitumen and corrosion and raises a suitable surface profile on the steel substrate in order to promote adhesion of the high performance coating system.

All the jointed areas were stripe coated with COPON Hycote 165PW Solvent Free Polyurethane, by brush up to 3mm thick (3000 Microns) in order to ensure that the joints do not leak in the future.

All sharp edges, struts, bolt heads, etc. were also all stripe coated by brush in order to ensure that the required thickness was achieved to these problematic areas.

COPON Hycote 165PW was then applied wet on wet by means of plural component, hot applied specialist spray equipment in order to achieve a total, nominal thickness of 1000 Microns (1mm). A ten year single source responsibility Guarantee was then submitted to the client along with a COVAC Completion Report including photographs taken of strategic stages of the contract.