The installation of an oil tank must comply with the standards set by the decree of 1 July 2004, in particular concerning the installation and commissioning of storage facilities for petroleum products such as fuel oil.

Buried, in a room, outdoors: the installation of an oil tank can be carried out in different ways.

Out-of-burial storage of an oil tank in a building

The standards for an unburied tank differ according to the volume of storage. In the case of a maximum capacity of 2,500 litres, the tank can be installed on the ground floor or in the basement on a masonry and flat floor. The part must be:

  • Well ventilated
  • Closed by a flameproof door (degree 1/4H).

In addition, walls and floors (top and bottom) must be 1/2H fireproof.

If the tank capacity exceeds 2,500 litres, the tank must be installed in a dedicated room. In this case, the flameproof door must be of degree 1H and open outwards. Another important point: a fresh air supply of at least 1dm² is required in the room.

Standards for unburied open-air storage

The installation of an open-air tank can only be carried out if it is designed for outdoor use. The implementation of an open-air tank must respect a minimum distance between the wall of the tank and the nearest building, to be defined according to the storage capacity:

  • Lower than 2,500 litres = no imposed distance ;
  • From 2,501 to 6,000 litres = 1 metre ;
  • From 6,001 to 10,000 litres = 6 metres

  • From 6,001 to 10,000 litres = 6 metres ;
  • From 10,001 to 50,000 litres = 7 metres

  • From 10,001 to 50,000 litres = 7 metres
  • Superior to 50,000 litres = 10 metres.

Installation of an oil tank in a pit

The storage of domestic fuel oil via an ordinary type tank is possible in a pit. The oil tank can be installed either outdoors or indoors, but only if there is no living space under the pit. In both cases, no water supply and sewerage, gas or electricity pipes must pass through or under the pit. To meet the standards, the pit must:

  • Be covered with a waterproof and petroleum-resistant coating on the inside ;
  • Form a reservoir of a volume equal to the capacity of the reservoir at least ;
  • Get a look to control the low point of the platform.

Last point: the pit should not be backfilled to easily detect the absence of leaks.

Buried storage

In the case of buried storage, the tank must be of high security. It can be buried outdoors or indoors, at the lowest level of the building. The other rules are:

  • Setting up the tank to a concrete floor ;
  • Protection and electrical insulation in the case of a steel tank ;
  • Passage of pipelines other than for storage at more than 0.50 metres.

The plastic fuel tank

A plastic fuel tank can be made of high-density polyethylene (HDPE) or glass fibre reinforced thermosetting resins. In the first case, the tanks can be unburied outdoors or inside a building. In the case of a plastic fuel tank composed of thermosetting resins reinforced with glass fibres, the installation must be in a pit or buried.