Underground Storage Tank
Horizontal cylindrical single and double-walled tanks for underground storage of flammable and non-flammable liquids. Made by using shell plates and dished ends made in carbon steel type complying with UNI EN 10025.
The external shell is welded by submerged arc welding procedure while the internal part is MIG-welded. Parts are designed in compliance with rules and regulations in force.
Single walled tanks, form an impermeable containment; they act as the inner tank of double-walled tanks.
Double walled tanks, for these tanks, a secondary wall is welded around the inner tank, which forms an impermeable self-contained tank. These tanks are provided with two sockets for the leak detection system in order to permanently monitor the integrity of the tank.
All tanks are hydraulically tested. Tests are pressure tests and are performed to check the inner tank and the interstitial space between the inner and the outer tanks as well.
- Service stations.
- Private fuel stations.
- Storage of flammable liquids for heating systems.
- Feeding generators.
- Storage of aircraft and ship fuels.
- Storage of chemicals and water-polluting liquids.
- Collection and storage of lubricants and drain oils.
- Collection and storage of waste and effluent water.
Each tank is provided with an external protection coating which also acts as cathodic protection.
The external coating of each tank undergoes a high-voltage test in order to prove its integrity.
Internal coatings
When an internal coating is required, tank's inner surface is prepared in accordance with the customer's requirement and the coating manufacturers specifications to ensure permanent adhesion of the selected coating. On request we can provide the following internal surface coating:
Main accessories
- Ø 600 mm (or different dimension if specified by the purchaser) access manhole complete with gasket and bolted cover.
- Loading access port with lockable quick cap and overfill protection valve.
- Vent equipped with flame arrestor net.
- Suction line provided with foot valve and strainer.
- Aluminium-made dip stick calibrated gauge to measure manually the fuel level.
- Wide range of mechanical or electronic level gauges.
A wide range of pumps and fuel meters to meet a large range of requirements and applications. Optionally can be installed a fuel management system to control fuelling operations and tank level.
