Fire Extinguishers

Halon, CO2, Neon,Nitrogen

Most use either kinetic energy in the form of a compressed gas, or chemical energy that is changed to kinetic energy (formation of a pressurized gas) to expel the extinguishing material.

As per Americal standard CLASS C is for electrical fire but in british standard it is not there because technically Electrical fire is not applicable since it will turns to CLASS A fire once it happened. so Dry Powder extinguisher is enough to extinguish the same.

The US has no standardized color system they use symbols. The colors are used in Europe with water being a solid red, foam red along a cream panel, dry powder is red with a blue panel, and red with a yellow panel is used with wet chemical.

A CO2 fire extinguisher will work on flammable liquid and electrical fires only. If used on any other type of fire they will just give it more oxygen and it will spread.

Aim the fire extinguisher at the base of the flames, and sweep back and forth

More specifically:
Trigger the fire alarm if not already done.
Have others leave the area.
Make sure you can get out safely and not be trapped.
Select a fire extinguisher type according to what is burning.
Pull the pin
Aim the nozzle at the fuel
Squeeze the handle
Sweep from the edges toward the center
Repeat, as necessary, with another extinguisher, if you have one.

onto many industrial purposes,

the Co2 fire extinguishers are often used in class B and C fires involving flammable liquids and electrical circuits. (one of the chemicals that cannot cause electric shock or can suppress flammable liquids).

CO2

Class A is for ordinary combustibles like cloth, paper, wood, rubber, plastic.

Most of the contents of soda-acid extinguishers (which are obsolete and completely illegal in the USA) is water. Water and oil don't mix well. The water may actually spread an oil fire as the flaming oil expands across the surface of the newly created puddle of water or as the oil is splashed in all directions by the force of the spray.

Soda-acid extinguishers can also be hazardous to operate even to fight the type of fire they were designed to fight (wood or paper fires) due to the fact that they contain a jar of sulphuric acid. As the user must invert the extinguisher first to dump the sulphuric acid into the sodium bicarbonate solution in the body of the extinguisher there is a chance that if something is wrong with the extinguisher or the user holds the nozzle wrong at that moment, he might get sulphuric acid on his skin or clothes!

Any chemical can be harmful in excessive amounts, and at the rate more fire-extinguishers dish them out, yes they will hurt you, or even kill you.

See your local safety instructor for full details on how each kind of extinguisher can be harmful in what way.

It depends on the fire type. There are 4 classes of fire extinguishers:

class A: paper, wood, cardboard, and most plastics. class B: flammable or combustible liquids such as gasoline, kerosene, grease and oil. class C: electrical equipment, such as appliances, wiring, circuit breakers and outlets. class D: combustible metals, such as magnesium, titanium, potassium and sodium

The extinguisher's rating is marked on the container. They are also colour coded for the specific type of fire.

The first fire extinguisher of which there is any record was patented in England in 1723 by Ambrose Godfrey, a celebrated chemist. It consisted of a cask of fire-extinguishing liquid containing a pewter chamber of gunpowder. This was connected with a system of fuses which were ignited, exploding the gunpowder and scattering the solution. This device was probably used to a limited extent, as Bradley's Weekly Messenger for November 7, 1729, refers to its efficiency in stopping a fire in London.

A classroom would generally contain only "ordinary combustibles", so a type A fire extinguisher would be appropriate.

In a chemistry laboratory, cooking class, automobile engines, electrical or welding class, different rules would dictate the type, placement and number of required fire extinguishers, typically Type ABC (multi-class).

There is no liquid powder extinguisher on the market.

If you can, the first thing you should do is turn off the electrical source. However, by this point, wire insulation and other materials are burning, so do not spend a lot of time fumbling with panel breakers as shutting off power will not extinguish flames. A dry chemical fire extinguisher is best for putting out the fire; second best is a CO2. NEVER NEVER NEVER use water unless you are a trained fireman. You run a high risk of electrocuting yourself and may cause adverse reactions with electrical equipment. If you are successful in putting out the fire, consider calling the fire department anyway. They are trained to look for signs of secondary hot spots that may have been ignited by the electrical circuit.

class b fuels for fire extinguisher training

The body of the extinguisher contains sodium bicarbonate dissolved in water. In the top, there is a bottle of acid. When someone turns the extinguisher upside down, the sodium bicarbonate and acid reacts to release carbon dioxide under pressure. The water/acid solution is then forced out of the extinguisher under pressure.

A magnisium fire burns at a significantly higher temperature than a typical fire with other combustable materials. If a water extinguisher were to be used on a metal fire, the heat of the fire will cause the water to break down into its chemical constituants Hydrogen, and Oxygen (H2O), and instead of removing heat from the fire it will actually cause the fire to intensify due to the addition of fuel Hydrogen (H2) and an oxidizer Oxygen (O).

Other extinguishers can extinguish the fire, but again due to the extreme heat it will take significantly more agent to extinguish this type of fire than would be needed for a standard combustables fire. An extinguishing agent which is designed for use on a metal fire can withstand the extreme heat and will extinguish the fire by blanketing the burning metal and smothering the fire by depriving it of oxygen. Dry Sand for example would work well. There are other agents which could be used on this type of fire which extinguish the fire interfering with the fire's chemical reaction rather than smothering it.

The best type of fire extinguisher for use on flammable liquid fires is a portable fire extinguisher that can extinguish every single class of fire as defined by EN3 (A-B-E-D-F), NFPA/ANSI/UL (A-B-C-D-K) standards. This class of extinguisher should also be capable of extinguishing, in the flammable liquids class (B), both polar and non-polar fuels (polar: alcohols, ethers and esters; non-pollar: gasoline, etc.). In-depth research will show that in the last 100-years only a new Technology known as FFC (Fire Fighting Catalyst) by FireStopper® has produced the only reliable, independently tested and rated, listed, all fire-class effective fire extinguisher that meets the above requirements and more. As an added bonus, this new water-based "Green" Technology is freeze resistant to -100°F (-73.3°C) without harmful anti-freeze additives usable in the harshest environments of the planet.

Get the extinguisher and have a good grip on it, pull the pin out of the handle, pull the hose/pipe/tube out if it has one, aim towards the center of the fire. Also, please make sure you are using the proper extinguisher type.

It extinguishes a paper fire by cooling...water is a cooling agent...fire is a product of heat...cool the heat=fire goes out.