Clause 7.3 of BS 5306-8:2023* states class B fires as “Fires involving flammable liquids.”

It adds “Different types of extinguisher, of the same class B fire rating, have different characteristics, which in particular circumstances might make one type preferable to another.

Foam is effective against contained (non-flowing) fires where it provides semi-permanent protection. With foam it is possible to partially extinguish a fire which will not regain full intensity for some time until the foam over the surface is destroyed. Foam can be applied to liquids in tanks to shield them from ignition from another source, or to prevent the evolution of flammable vapours.

Powder and CO2 are effective media for tackling uncontained (spill or “running”) fires.”

BAFE SP101 Registered Organisations will be able to advise the Responsible Person (i.e. the customer) on suitable fire extinguishers for their premises that meet all the requirements of BS 5306-8 and the BAFE SP101 Scheme (which includes additional parts of BS 5306 to also be followed).

*BS 5306-8:2023 is the British Standard for Fire extinguishing installations and equipment on premises Part 8: Selection and positioning of portable fire extinguishers – Code of practice. All information provided is used from this version of the British Standard.

Every effort is made to ensure that the information provided is accurate and up to date as of time of publishing. Any sources of information are stated appropriately. No legal responsibility is accepted for any errors or omissions.