Design and fabrication of
underground tanks for gasoline and diesel!
Safe underground storage of gasoline and diesel
An underground storage tank (UST) is usually horizontal and installed below ground. It is used to store gasoline and diesel at filling stations, urban depots and sites with limited space above ground. Burying the tank reduces the footprint at surface level and is required or preferred under many urban safety regulations.
What is an underground tank?
An underground storage tank (UST) is usually horizontal and installed below ground. It is used to store gasoline and diesel at filling stations, urban depots and sites with limited space above ground. Burying the tank reduces the footprint at surface level and is required or preferred under many urban safety regulations.
An underground tank must be designed for soil load, traffic load at the surface, external corrosion and the risk of leaks reaching groundwater. That is why it is usually made of steel plate with a strong anti-corrosion coating, or where needed with a double wall and a leak-monitoring system.
Design principles of underground tanks
The four main factors that set an underground tank's capacity, safety and service life:
A double-wall tank with monitoring of the space between the walls allows early leak detection and is usually recommended or required on projects near groundwater. An external coating, and cathodic protection where needed, extend service life in constant contact with soil.
Technical specifications
Why an underground tank for gasoline and diesel?
At filling stations, surface space is limited and urban safety rules often prefer fuel to be stored underground. By reducing surface evaporation and keeping the fuel away from ignition sources above ground, the underground tank is the usual choice for gasoline and diesel.
Single or double wall?
A double-wall tank with monitoring of the space between the walls allows early leak detection and is recommended or required on many projects near groundwater. The final choice depends on local regulations and how sensitive the environment is.
Coating and cathodic protection
An underground tank is in constant contact with soil; a suitable epoxy or bitumen coating, and cathodic protection where needed, noticeably extend its service life and reduce the risk of perforation.
Applications and industries
Photo gallery
Underground tank gallery
Frequently asked questions
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Underground tank
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