South Australian Country Fire Service Promotions Unit
Raising awareness of the roles, training and activities of 14,475 CFS Volunteers state-wide
Wednesday, June 19, 2013
Fire Fighting Foam
The purpose of using A Class foam in firefighting, is to provide a surfactant to the water, which assists the water to penetrate the material to provide cooling, and to lessen the effect of run off from the material. There are three types of foam used commonly in today's firefighting, and these are:-
The type of foam used at an incident, such as a scrub or grass fire is generally the A class foam, at an application rate of 0.1% foam to water mix. This will enable the water to penetrate the grass and wood involved, and provide cooling of the material. The same foam is used in structure firefighting, enabling better penetration of water into burning materials.
Most fire appliances now carry a built in foam induction system directly off the pump to provide the desired application rate as required. An aerator can be fitted to an existing branch, or a dedicated foam branch can be used. The foam branch will be pre-set to a percentage rate applicable to its normal use (usually 6%).
Other types of foam branches use an induction line incorporated into the branch, which the operators will carry, with the foam containers to the position required, then place the induction line into the container to start the mix.
Why foam for Bushfires:
This Information was provided by the
SACFS Promotions Unit