Last week, our team were down in the south of England to carry out the reline of a cold water tank, along with a multitude of associated mechanical works. The storage structure was situated in the plant room of a community college and required an engineering team who were fully trained in confined spaces to gain entry. Fortunately, all of our specialist team undergo rigorous training in areas such like this, as a testament to our 'safety first' value. Following the draining of the tank, it was clear to see that the substrates had succumb to corrosion and failure to address this issue would result in a breach of compliance. As the works would be carried out over a two-day period, a temporary mains bypass was installed to maintain supply and mitigate any disruptions.
The images below display the next core phase of the project. In order to achieve the correct curing conditions would be achieved and the subsequent polyurethane coating would bond adequately, all surfaces were abraded to raise the profile. Where necessary, dehumidification equipment was utilised to attain these conditions, accessible bolts were tightened and mastic joints were repaired. Following this, all of the GRP water tank joints, edges, bolt heads and struts were treated with a stripe coat of our solvent-free polyurethane: Tank Reline 165 DWPU. This guaranteed that any high-risk areas were secured and would enable the succeeding lining to be a seamless membrane.
The photos below showcase the final stage of the works, which entailed the full reline to the internal substrates. Through with a roller, two coats were applied to all panel surfaces with a setting period in between, each with a 500-micron wet film thickness. To ensure this was carried out accurately, a dry film thickness test was carried out during the process, with an average thickness of more than 1000 microns achieved on all surfaces. Upon completion of the works, our engineers refilled and disinfected the cold-water storage tank, in accordance with the requirements of PD855468:2015. The temporary bypass was removed and the tank was recommissioned into service, with a disinfection certificate and completion report issued by our planning team.