BS EN 12285-2:2005 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
- 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 of maximum 1,5 bar (abs.)
- where double skin tanks with a vacuum leak detection system are used the cinematic viscosity of the stored media shall not exceed 0.005 m2/s.
This standard is applicable for normal ambient temperature conditions (-20 degrees C to + 50 degrees C).
This standard is not applicable to the storage of dangerous liquids such as explosives, substances liable to spontaneous combustion, substances which in contact with water emit flammable gases, organic peroxides, infectious substances, radioactive material, hydrocyanic or hydrocyanic solvent liquids, metalcarbonyls, hydrofluoracid and bromide liquids.
This standard does not cover the installation of tanks which might be subject to local regulations involving pollution control.
