Some protection against gas cylinders overheating can be achieved by ensuring that any gas cylinder locker or housing has a fire resistance of 30 minutes. There are several accepted ways of achieving this fire resistance for cylinder lockers or cylinder housings:
- they must be constructed of metal at least 0.9mm (0.03ins) thick, with continuously welded or brazed joints
- they must be made of fibre reinforced plastics (FRP) of minimum thickness 5mm (0.2ins)
- they must be made of materials with a fire resistance of 30 minutes, in accordance with BS 476-20. [7.4]