The Scope of the Project
There are lot of steel storage tanks for drinking water all over the world which must be protected in order to save the asset, the valuable drinking water. As the water is highly corrosive for steel vessels the steel surface must be separated from the stored liquid. The most effective way to prevent the contact between the two materials is a drinking water tank lining. Wolftank Adisa has its own lining system for drinking water storage tanks irrespective of the size and shape of the vessel.
The biggest challenge was that our Spanish partner AlterEco has never applied this lining system in Spain. This was a completely new solution for our partner and the market. On the other hand, AlterEco has already collected enough experiences with Wolftank owned systems such as Duplo® and other single and double wall applications. They have the experienced manpower and the proper equipment for such a lining work. They got to know the specifications of the products and application steps and they could smoothly execute the project.
The first step to ensure the accurate adhesion between the subsurface and the coating is the surface preparation. For this project we used instead of the conventional surface preparation method such as grid-blasting or jet-blasting our rust converter agent which must be applied after the mechanical removal of the rust. Usage of this methodology the implementer saves not only time because the application takes only a few hours and the reaction time of agent is 2-3 hours but money as well because it is not required the costly blasting equipment, the grid and there is no any dust or residuals which must be removed which also costs time and money.
Subsequently the coating must be applied. The resin which is used for drinking water is 2-component epoxy-based resin that can be applied with airless spraying machine or it can also be rolled. In this case the lining was rolled in two layers.
The drinking water tank lining can be applied all over the world. The system has many advantages especially the short downtime because of the easy and fast application.
The expected extend of the lifetime is up to 10 years.