scope:

This document specifies the requirements for metallic shop fabricated cylindrical, horizontal steel tanks, single and double skin for the aboveground 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, - where double skin tanks with a vacuum leak detection system are used the kinematic viscosity of the stored media shall not exceed 5 x 10 -3 m 2 /s. This standard is applicable for normal operating temperature conditions (- 20 _ C to + 50 _ C). Where temperatures can fall below this range, additional requirements shall be taken into account. For guidance of the liquid-material combinations see EN 12285-1; Annex B.