DIN EN 12285-1:2003-07

The Standard specifies the requirements for shop fabricated cylindrical, horizontal tanks, single and double skin for underground storage of water polluting liquids (both flammable and non-flammable) within the following limits: - from 800 mm up to 3000 mm nominal diameter; - up to a maximum overall length of 6 times the nominal diameter; - for liquids with a maximum density of up to 1,9 kg/l; - with an operating pressure (po) of maximum 1,5 bar (abs.) and - for double skin tanks with a vacuum leak detection system where the kinematic viscosity does not exceed 5 × 10-3 m2/s. This standard is applicable for normal operating temperature conditions (-20 °C to +50 °C).