Client: Factory in Hull
Project details: The internal refurbishment & relining 1 no. GRP cold water storage tank sized 2.5m x 1.5m x 1.5m
Summary of works: Extensive preparation of cold water storage tanks internal surfaces followed by the application of WRAS approved ES 988 DWPU solvent free polyurethane.
Guarantee: 10 Years
Completion Date: 2019
Description of Works:
Heavily corroded galvanised steel cold water storage tank fully refurbished and relined utilising our solvent free WRAS approved polyurethane ES 988 DWPU
The cold water storage tank was previously coated 15 years ago with an epoxy coating which had subsequently failed, exposing the corroded surface beneath subsequently causing the tanks internal surfaces to rapidly deteriorate.
All internal surfaces of the cold water storage tank were extensively prepared by removing all failed coatings prior to stipe coating all joints and structurally vulnerable areas of the water tank prior to applying two coats of ES 988 DWPU.
Our operatives then disinfected the water tank upon completion of works to ensure it was compliant with ACoP L8 before placing it back online.
As with all our projects our client received a detailed photographic completion report upon completion of our works accompanied by our long term 10 year guarantee.
BEFORE – CWST heavily affected by internal rusting.
PREPARATION – The tank was manually prepared using a scablatex head to remove the existing coating and to raise a surface profile of 75micron to accept the new coating.
STRIP COATING - A stripe coat of ES 988 DWPU was then applied to all joints, seams and sharp edges to reinforce these critical areas and to allow the coating to be built up to 2-3mm.
BASE COAT – The above was followed by an entire base coat of ES 988 DWPU, applied to all internal surfaces at a nominal thickness of 300- 500 micron
TOP COAT – The above was repeated with a top coat of ES 988 DWPU, again applied to all internal surfaces at a nominal thickness of 300- 500 micron. As with the base coat, all critical seams were ‘stripe’ coated to build up the coating thickness in these areas.
DISINFECTION – Once the coating had cured, the tank was refilled, disinfected with SuperSil and put back on line.
ADDITIONAL WORKS – The temporary tank and associated pipe work were drained and the pipework disconnected from the system as found at start of project.