Most fires can be safely doused with water. Why just
"most?"
Fires take on the characteristics of the fuel,
resulting in fires worse than simply burning paper. If you try dousing a petrol
fire with water, for instance, the petrol—being lighter than water—will simply
spread over a wide area, igniting more flammable materials nearby. You'll need
something that chemically bonds with oil to put out the flame; i.e. foam or
carbon dioxide.
Fire risk assessment takes into account possible
scenarios for a fire, which includes the kinds of fuel that can cause one. Factories
are at a greater risk of fire than homes since they normally house different
kinds of fuel and fire hazards. They may have a gas line running throughout the
entire facility or may be working with high-voltage electrical currents.
Dry powder is the most versatile fire extinguisher
available. Also known as dry chemical, this fire extinguisher is either classified
as ABC (containing ammonium phosphate) or BC (containing sodium or potassium
phosphate). These chemicals works by absorbing fuel molecules, thereby interrupting
the burning process by smothering the flames.
While dry powder is effective for all types of fire,
safety experts warn against using the wrong extinguisher due to the risk of re-ignition.
In gas fires, without separating the fire from the source of fuel, efforts to
bring the blaze under control will be futile. That's why it's best to have the
right type(s) of fire extinguisher(s) for your home or facility.
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