Cold Water Tank Linings
THE PROBLEM – Cold Water Tank Linings
The 14 cold water supply tanks were severely corroded, with extensive lamination present. Furthermore, the poor condition of the tank lining would support the growth of harmful aquatic micro-organisms such as legionella.
THE SOLUTION – Cold Water Tank Linings
As an experienced tank lining contractor we understand that a good tank lining begins with good surface preparation. Due to the restricted access and working in close proximity to occupied residential units the only preparation method available was mechanical preparation. All laminate corrosion was removed using chipping hammers and needle guns prior to mechanical wire brushing and abrading to achieve surface preparation standard ST2.
As part of the tank lining preparation numerous perforations were exposed in the tanks structures that conventionally would have meant replacing the tanks. However due to the restricted access and down time this was not a possibility. Therefore following priming perforations were plated with galvanized steel plate which was bonded using a Ceramic Epoxy putty and secured using rivets prior to the application of the tank lining system.
Due to the mechanical preparation methods a surface tolerant epoxy tank lining primer was used which is specifically designed for the application to hand prepared steel. This was followed by two coats of glass flake reinforced epoxy tank lining material. The self leafing glass flake contained within the coating provide a more tortuos route for oxygen and moisture to reach the substrate, offering improved corrosion resistance. The epoxy tank lining was applied in two coats of contrasting colour to aid application as part of good coating practice.
The client was extremely pleased with our tank lining works and the manner in which our operatives conducted themselves on site. In total 14 tanks were lined in three weeks including the additional repairs all of which had to be coordinated around the building occupants.