ÖNORM EN 12285-1

This 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 x 10-3 m2/s. This 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. For guidance on the liquid-material combinations see Annex B. This standard is not applicable to the liquid classes listed in Table 1 because of special dangers involved. This standard does not deal with internal coating.