Fire Extinguisher Varieties
It’s hard to beat water for fire-fighting efficiency. This product is only for use on Class A fires. Solid red in color, water fire extinguishers are also recognized by their hose and spout, useful for soaking the base of a conflagration. Due to the fact that water is a conductor of electricity, fire extinguishers that utilize water should not be used near electricity or electric cables. It is wisest to keep H20 extinguishers along with CO2 extinguishers, as this covers the risk of electrical fires as well.
Water extinguishers saturate burning constituents thereby cooling them and pacifying the flames.
AFFF foam is effective on Class A fires (as is water) and is also effective on Class B/flammable liquid fires. When covered onto a fire, AFFF foam smothers and overwhelms the flames, then contains in any hazardous fumes below the surface of foam. Luckily, foam not only gets through any porous materials but also cools fire. This is accomplished as the water that’s in the foam begins to evaporate. Although the foam from extinguishers is considered non-conductive and rated BS EN3 35,000V they may be used near but never on active electrical devices.
Their cream color coded panel distinguishes foam fire extinguishers. A good fire extinguisher to use on electrical fires would be your standard C02 (Carbon Dioxide) fire extinguisher. Carbon dioxide does not transfer heat and will leave no mess, which makes it advantageous when using it around electronics. In addition these kinds of fire extinguishers are powerful on class B fires namely inflammable fluids.
Carbon dioxide extinguishers can be identified by their black panel codes and the horn that is pointed at the fire to prevent freezer burn.
Newer co2 fire extinguisher models use anti-frost horns as a bonus safety feature. A water or foam alongside a CO2 extinguisher is the most frequent extinguisher mix for efficient fire fighting. The most flexible fire extinguisher types and are able to extinguish Flammable solids, liquids, gasses and electrical fires are dry powder fire extinguishers. There are recommended often for using on vehicles and in the home; however, though they are multipurpose, powder extinguishers don’t work well in enclosed places or with sensitive equipment, and a better suited type should be used when possible. Fire extinguishers that use powder have a blue panel to set them apart and work by smothering a fire to keep it from sparking up again, while water-based ones are meant specifically for fires from cooking fat, which are known as class F fires.
Most industrial kitchens had foam or powder extinguishers before the creation of wet chemical extinguishers, however normal fire extinguisher types such as these can aggravate a cooking fat fire as they cannot lower the temperature of oil risking re-ignition, and can make hot oil splash up on contact with the extinguishing agent. A wet chemical extinguisher cools the flames and fat, and smothers the hot fat to prevent re-ignition when operated. A wet chemical fire extinguisher has a long lance used to safely distribute the extinguishing agent at a distance and a yellow panel on its body. This specialized fire extinguisher, while not intended to douse electrical fires, has been tested and passed the BSi 35kv conductivity test.