Use of fire extinguishers

Fire extinguishers

Extinguishing capsule filled with various types of firefighting foam Water and gas capsules Powder and gas capsules Capsules containing more chemicals Capsules filled with carbon dioxide gas Co2

Fire classification

Class A: In this class, fire occurs due to dry flammable materials such as paper, wood, etc. Class B: Fires in this class are caused by flammable liquids such as oil, gasoline, etc. Class C: Fire or combustion occurs due to gases such as hydrogen, methane and butane in this class. Class D: Flammable metals such as potassium, aluminum or magnesium will cause fire. Class E: Fires related to electrical equipment are placed in this class. Class F: In this classification, fire occurs due to the burning of cooking oils.

Types of firefighting capsules and their application

According to the classification of fire, various types of fire extinguishers have been produced. These various capsules have different uses from each other.

Foam off capsule

Foam extinguishing capsule is a type of fire extinguishing capsule that is suitable for extinguishing class B fires. The composition used in this capsule is based on water, which can be used in group A fires. This capsule is marked with a yellow sticker. The application of this capsule is in fires caused by flammable materials such as: wood, cloth, paper, as well as combustible liquids such as gasoline, which is effective in setting the car on fire. Do not use this type of capsule to extinguish fires caused by electrical appliances placed on D floor; Because the foam capsule is based on water and as a result of its spraying, it can cause a strong reaction with electricity and may cause the fire to spread. To put out fires caused by electrical appliances, you should use a special fire extinguisher. Foam extinguishers cool the heat caused by flammable materials with foam, which will reduce the speed of the combustion center.

Water and gas capsules

These extinguishers are very suitable for group A fires. This capsule is used to extinguish the fire of inflammable materials such as carpets, furniture, wooden or paper products, etc. A compressed gas called carbon dioxide or Co2 is used in this capsule for proper pressure to extinguish the fire. A cylinder called a cartridge is installed in this type of capsule, which is responsible for providing pressure to the contents of the capsule. Pay attention to this point, when the cartridge is released, the capsule will be useless. Every 2 years, you should check the sensor in the extinguisher. If the weight of the cartridge has decreased by more than 10%, it must be charged so that the capsule can be used. Due to the presence of water in the composition of this fire extinguisher, do not use it to extinguish fires caused by electrical appliances, because water is a conductor of electricity. Spraying water in these conditions will only increase the intensity of combustion.

Powder and gas capsules

These types of capsules are known as extinguishing agents of groups A, B and C. Powder and gas capsules should not be used in closed spaces, because dry powder is easily inhaled and can cause serious problems for human lungs. After extinguishing the fire with this type of capsule, you will realize that cleaning the remaining material from it will not be an easy task at all. This capsule consists of a combination of sodium chloride, potassium chloride and barium, which after spraying creates a thick layer on the flames and prevents oxygen from reaching the fire. In fires related to electrical appliances above **** volts, powder and gas capsules cannot be a very good option, because the ignition power is much higher than the power of the capsule. This capsule can be used in productions such as: welding, industrial garages, etc.

Capsules containing more chemical or wetter

Wet or wet chemical extinguishers are designed for use on Class F fires, including cooking oils. They can also be used on Class A fires. But in general, dry powder extinguishers have a better performance than chemical capsules in extinguishing flames by forming a barrier between flammable materials in the vicinity of the fire. The color of the label of this type of extinguisher is yellow. Wet chemical capsules can also be used for fires caused by wood, coal, cloth, cardboard and paper. This type of capsule can be used in places such as the kitchen.

Capsule containing carbon dioxide (CO2)

CO2 extinguishers are usually used for fires caused by electrical appliances and equipment. In fact, the main type of fire extinguisher is the one containing carbon dioxide, which is used in the server rooms of large centers. These types of capsules also extinguish Class B fires. Carbon dioxide or Co2 is an odorless, non-toxic and neutral gas that is 1.5 times heavier than air. This is the reason for its good performance during fire extinguishing. The function of this gas is to cover the fire like a surface to prevent oxygen from entering the heat source. These types of capsules have no usage restrictions and can be installed in places such as offices, offices, organizations, etc. All the capsules we mentioned each play a specific role. By knowing their efficiency, you can easily make the right choice when buying firefighting equipment and also make the right decision when an accident occurs. Of course, apart from the fire extinguisher, in recent years, the use of fire extinguishers to extinguish the fire has become popular.

Which gas is used in the fire extinguisher?

Carbon dioxide or Co2 is the most widely used gas used in fire extinguishers, because this gas is cheaper and even easier to compress than other gases. Also, the pressure of this gas is so high that it causes the speed of spraying and throwing of extinguishing compounds in the capsule tank. This speed of action will be very effective in extinguishing the fire. Another reason for using carbon dioxide is that during compression, its temperature drops significantly. In the event of a fire, this gas will reduce the heat of the flames and prevent the oxygen needed to reach the center of the fire.

What are the use of powder and gas capsules inside the fire extinguishers?

These capsules are used more than other extinguishers. Most organizations and offices use this type of fire extinguisher. The reason for using these extinguishers is that, during a fire, they can prevent the spread of combustion by stopping the chemical reaction and oxygen. These types of capsules are effective in fires of groups A, B, C and E.