Sectional Steel Water Tank
Client: NHS - Hospital in the South East
Project Brief: The Internal Preparation & Coating of 1 No Sectional Steel CWS Tank/2 No Compartments
System Specification: Acothane DW Solvent Free Polyurethane
Completion Date: 2015
Guarantee: 10 Years
COVAC Contract Ref: 1283
Located in a dedicated plant room, the structure supplies all potable water supplies to the hospital. It is a twin compartment, sectional tank constructed from 1000mm x 1000mm galvanised, mild steel pressed panels.
The total size of the tank is approximately 7.0m long x 5.5m wide x 3.0m high and has an internal sectional, steel, divisional wall which splits the tank into 2 No. compartments, each sized at approximately:- 3m x 7m x 3m and 2.5m x 7m x 3m.
The internals of the steel substrate had been previously coated with a bitumen paint which should no longer be used in potable /drinking water tanks due to their carcinogenic properties and high solvent content which can leach into the water putting users at risk of serious health issues. This existing coating had started to de-bond from the steel substrate resulting in significant corrosion providing nutrients for harmful bacteria such as Legionella.