DIN EN 12285-1:2014-05

This draft standard specifies the requirements for shop fabricated cylindrical, horizontal steel tanks, single and double skin for the underground storage of water polluting liquids (both flammable and non-flammable) within the following limits: - from 800 mm up to 3000 mm nominal diameter and, - up to a maximum overall length of 6 times the nominal diameter and, - for liquids with a maximum density of up to 1,9 kg/l and, - 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-1. This draft standard is applicable for normal operating temperature conditions (-20 °C to +50 °C). Where temperatures are outside this range, additional requirements should be taken into account.