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Fire Extinguisher label of classification

Fire Extinguisher label of classification




Fire is the rapid oxidation of a material in the exothermic chemical process of a combustion, releasing heat, light and various reaction products. The flame is the visible part of the fire.


Fire Extinguisher label of classification




Fire Triangle:

The triangle illustrates the three elements that a fire must light, the heat, the fuel and an oxidizing agent (usually oxygen). A fire occurs naturally when the elements are present and united in the right mixture and a fire can be prevented or extinguished by removing one of the elements of the fire triangle.


Fire Tetrahedron:

The fire tetrahedron represents the addition of a component, the chemical chain reaction, to the three already present in the fire triangle. Once the fire is on, the resulting exothermic chain reaction maintains the fire and allows it to continue until at least one of the elements of the fire is blocked.





Classification of Fire:

Class A fire: ordinary combustible materials such as wood, cloth, paper, rubber and some plastics, etc., which, when burned, leave a residue in the form of ash.

Class B fire: Flammable liquids, combustible liquids, petroleum fats, oils, paints, solvents, alcohols and liquid solids.

Class C fires: fires involving pressurized flammable gases, including liquefied gases, in which it is necessary to rapidly inhibit combustion gases with an inert gas, powder or Spray liquid for fire extinguishers, including live electrical equipment, such as a computer, a transformer and a control panel. etc. Note that if the power to the equipment is cut off, a class "C" fire becomes an "A" class fire.



Class D fires: involve combustible metals, such as magnesium, sodium, aluminum, titanium, zirconium and potassium.


Fire Extinguisher: Portable device that releases water, foam, gas, dry chemical or any other material to extinguish a fire.





CO2 Fire extinguisher :

* Used for class B flammable liquids, Class C flammable gases and electrical fires.

* These fire extinguishers are filled with non-flammable carbon dioxide gas under extreme pressure.

* Recognized by its hardness and lack of manometer.

* The pressure in the cylinder is so strong that pieces of dry ice may spurt out of the horn when used.

* These extinguishers by moving oxygen or removing the oxygen element from the fire triangle.

* Distinguished by a group of black color.







DCP Fire extinguisher :


Chemical powder extinguishers are available in a variety of types, you can see them labeled:

* ABC indicating that they are designed to extinguish Class A, B and C fires.

* '' BC '' indicates that they are designed to extinguish Class A, B and C lights.

* The common agents for the powder extinguisher are monoammonium phosphate, sodium bicarbonate, potassium bicarbonate, etc.

* Nitrogen gas is used to be under pressure in the fire extinguisher.

* Dry powder fire extinguishers discarded by covering the fuel with a thin layer of dust, separating the fuel from the oxygen in the air.

* The powder also acts to interrupt the chemical reaction of fire, making these fire extinguishers extremely effective.

* Distinguished by a "blue" color band.



Operation of Fire extinguisher :

Activating a fire extinguisher to apply the extinguishing agent is a unique four-step operation.

The acronym PASS is a useful way to remember these steps:





* Pull the safety pin.

* Point the nozzle at the base of the flames.

* Squeeze the trigger to unload the agent.

* Sweep the nozzle at the base of the flames.

When using a fire extinguisher,

always approach the fire with an exit behind you. If you are outside, make sure the wind is in your back.


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