The Scope of the Project
Bulk storage tanks in tank farms or refineries are endangered by outside corrosion. These steel tanks face not only with inside corrosion which is caused by the medium but external corrosion as well which is the reason of weather conditions, humidity, salt etc. An external tank roof lining is an important investment which helps saving your asset (tank and medium) and avoids environmental difficulties.
Our customer is one of the biggest oil company in central Europe and definitely the most powerful in Austria. They have high standards of safety and quality so the biggest challenge was to find a subcontractor who is able to fulfil all these high requirements.
Besides the above-mentioned challenge there was another one: the application of the roof is very difficult because of its own conical shape and the roof subsurface must be cleaned in order to reach the SA2,5 cleanliness.
As the roof is uncovered area and to avoid any serious pollution, we had to find a closed cleaning system instead of the regular sand blasting solution. Our partner used a shot blasting machine which provided the necessary cleanliness and roughness.
Advantage of shot blasting:
- 3 times faster and cheaper
- Less effect on the working speed and efficacy because of weather conditions
- Less waste material
- Less dust and dirt
After achieving the proper subsurface requirements, the application of the corrosion protection system is the next step. As this area is in high corrosivity category (>C4) the applied system contains three different layers:
- Ground layer
- Intermediate layer
- Top layer
All the resins were applied with airless spray unit and by the difficult approachable spots were spread with rollers. The whole process was planned with the cleaning technology and material structures that the lining system has 20 years of lifetime.
Since the project was ready before the deadline and all the safety instructions were kept, the costumer was satisfied too. The professionalism was recognised and Wolftank Adisa keeps participating on the customer´s tenders with high hit rate.
With this difficult tank roof lining Wolftank Adisa could expand its reference working list with highly satisfied big player on the market.