British Standards Document
BS EN 12285-1
Workshop fabricated steel tanks. Horizontal cylindrical single skin and double skin tanks for the underground storage of flammable and nonflammable water polluting liquids other than for heating and cooling of buildings

https://doi.org/10.3403/30319006U

BS EN 12285-1 is maintained by PVE/15. The current release of this standard is:

BS EN 12285-1:2018 Workshop fabricated steel tanks. Horizontal cylindrical single skin and double skin tanks for the underground storage of flammable and nonflammable water polluting liquids other than for heating and cooling of buildings

https://doi.org/10.3403/30319006 (published 05/07/2018)

This standard is available from the following sources:

Other historical versions of this standard document also exist: