BS 2654-1:1956 relates to the materials, design and fabrication or vertical mild steel cylindrical welt:!ed tanks for tho petroleum industzy, for erection above ground, of the following designs:

a. Non-pressure fixed roof tanks (all sizes).
b. Pressure fixed roof tanks (up to 128 ft diameter only).
c. Open-top tanks (all sizes).

This standard specifies tho use only of butt-welded shells and includes reference to mountings, stairways and hand railings.This standard does not include the design and construction of floating roofs.