Frequently, somebody who requires a fire extinguisher may purchase an ABC fire extinguisher without giving much consideration to the true fire dangers they will need to safeguard against. While purchasing fire extinguishers, you have to understand a few things about extinguishers so as to make an educated choice, particularly, the fire course you want to safeguard against and unique conditions you want to contemplate (computer electronic equipment, by way of instance).

Classes of fire extinguishers

If it comes to fire extinguishers, you will find five types of fires: A, B, C, D, and K.

Class A - Fire extinguishers rated for Class A fires possess a green triangle with an "A" at the centre in addition to a pictogram of a garbage can and wood burning. These extinguishers are utilized to put out fires for frequent combustibles like paper, fabric, rubber, and some plastics (substances that render ashes when burnt, therefore, the "A").
Class B - Fire extinguishers rated for Class B fires have a red square with a "B" at the centre in addition to a pictogram of a gas can using a burning puddle. These extinguishers are utilized to extinguish fires for flammable fluids such as gasoline, lubricating oil, gas, and lots of organic solvents utilized in labs (items found in barrels, and therefore "B").
Class C - Fire extinguishers rated for Class C fires have a blue ring with a "C" at the centre in addition to a pictogram of an electrical plug in with a burning socket. These extinguishers are utilized to extinguish electrical fires for energized electric equipment, electrical motors, circuit boards, switches, and gear ("C" to get current-electrical).
Class D - Fire extinguishers rated for Class D fires possess a yellow pentagram (star) using a "D" at the centre in addition to a pictogram of a burning equipment and posture. These extinguishers are utilized to extinguish flames from metals and metallic alloys like magnesium, titanium, and magnesium.
Class K - Class K fire extinguishers are used especially for cooking fires from grease, fat, and cooking oil ("K" for kitchen).
It's possible to get fire extinguishers using one course score or multiple fire course evaluations (ABC or BC, by way of instance).




Fire extinguishing materials

Fire extinguishers utilize various substances for extinguishing fires. When picking your extinguisher, you have to ascertain which sort of fire you might be fighting and pick the best extinguishing material to the own application.

Water: Water, or APW, extinguishers utilize pressurized water to extinguish fires. APW extinguishers can only be utilized for Class A fires (combustibles like paper, fabric, etc.); they can't be used for placing out other types of fires.
Dry compound: Dry compounds are utilized to extinguish A-, B-, C, or even D-type fires. They work by placing a nice layer of compound dust on the substance that's burning. Dry chemical extinguishers are extremely capable of putting out fires. But, dry chemical extinguishers may be abrasive and resistant to electronic equipment and certain other substances.
Carbon dioxide: Carbon dioxide operates by removing oxygen in the immediate area of the flame. Carbon dioxide extinguishers are only ever used for B (flammable liquid) and C (electric fires) extinguishers. For medical, computer and electronics, and aircraft electronics, carbon dioxide are a much better option compared to dry chemical extinguishers since a carbon dioxide extinguisher leaves no residue.
Metal/sand: Some type D fire extinguishers utilize sand or metal, for example sodium chloride (NaCl) or powdered aluminum alloy, to smother flames from metals and metallic alloys.
Special applications

Some fire dangers need technical extinguishers. Listed below are a couple examples of these programs.

Steel or sand extinguishers are Utilized to put out course D (metal and metal alloy) fires:

Salt (sodium chloride--NaCl) is the most widely used substance in metal/sand extinguishers. NaCl extinguishers work nicely with fires between magnesium, magnesium, potassium, metals of sodium and potassium, uranium, and powdered aluminum.
Sodium carbonate extinguishers can also be used on fires involving potassium, sodium, and metals of sodium and potassium. Where pressure corrosion of stainless steel is a consideration, this kind of fire extinguisher are a much better option than an NaCl extinguisher.
Powdered copper (Cu) metal is used for fires between lithium ion and lithium alloys.
Graphite powder extinguishers are used on lithium fires in addition to fires which involve high-melting-point metals such as titanium and zirconium.
Sodium-bicarbonate-based extinguishers are used on fires involving metal alkyls and pyrophoric liquids.
Halotron I is a fresh agent replacement for Halon 1211, that was prohibited from use because of its ozone depleting properties. Halotron I extinguishers are used for extinguishing fires in computer rooms, clean rooms, and in which telecommunications equipment or electronic equipment are found. Halotron leaves no residue and can be nonconducting but is significantly more costly than carbon dioxide. It must be mentioned that Halotron I shall no longer be generated after 2015.

FE-36 (CleanGuard) extinguishers are just another wash agent replacement for Halon 1211. FE-36 extinguishers are somewhat less poisonous than Halon 1211 and Halotron I and allegedly don't have any ozone-depleting potential. FE-36 can be used for fires in computer rooms, clean rooms, and in which telecommunications equipment or electronic equipment are found. Contrary to Halotron I, FE-36 isn't intended for phase-out.

Nonmagnetic fire extinguishers: Wherever powerful connectors are in use, by way of instance, close magnetic resonance imaging (MRI) or nuclear magnetic resonance spectrometers (NMRSs), nonmagnetic fire extinguishers must be selected. The powerful magnetic fields created by this kind of equipment can lead to steel pipe fire extinguishers to fly round an area with lethal force.

It's crucial to make certain you have the right fire extinguishers to your surroundings or potential fire risks. It may be the difference between if your flame is removed or triggers a catastrophy.