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Fire extinguishers apply an agent that will cool burning heat, smother fuel or remove oxygen so the fire cannot continue to burn. A portable fire extinguisher can quickly control a small fire if applied by an individual properly trained. Fire extinguishers are located throughout every building on campus.
Suitable for Class A, B and C fires, they are specifically designed to tackle fires involving solids, flammable liquids and flammable gases. They can also be used on electrical equipment. Dangers: Automatic fire extinguishers are not suitable for fires involving cooking oil or fat.
Country Of Origin : India
Fire extinguishers are one of the most critical pieces of safety equipment in any space, whether residential, commercial, or industrial. Designed to combat small fires effectively, these devices can be life-saving when deployed correctly. The primary function of a fire extinguisher is to apply an agent that cools the burning heat, smothers the fuel, or removes oxygen so that the fire cannot continue to burn. This description will detail the types, operations, variants, and essential aspects of fire extinguishers, specifically focusing on those designed for Class A, B, and C fires.
Fire extinguishers are manufactured to combat various classes of fires:
Class A Fires: Involving solid combustibles like wood, paper, and textiles. Extinguishers for this class typically contain water, foam, or dry chemical agents.
Class B Fires: Involving flammable liquids such as gasoline, oil, and paint. These fires are best tackled with foam, carbon dioxide (CO₂), or dry chemical extinguishers.
Class C Fires: Involving electrical equipment and appliances. Extinguishers for this class are non-conductive and usually contain dry chemicals or CO₂.
The fire extinguishers discussed in this description are multipurpose and suitable for Class A, B, and C fires, making them versatile and invaluable in various environments.
Fire extinguishers operate by using different mechanisms to combat the fire:
Cooling: Water-based agents cool the burning material, reducing the heat to a point where the fire cannot sustain itself.
Smothering: Agents like foam and CO₂ displace the oxygen surrounding the fire, effectively choking it.
Chemical Reaction: Dry chemical agents interfere with the chemical reactions occurring within the flames, effectively stopping the fire.
Fire extinguishers consist of several crucial components that make them effective:
Cylinder: The main body that holds the extinguishing agent and the propellant.
Valve and Handle: Used to release the agent. The valve controls the flow, and the handle, when squeezed, opens the valve.
Pressure Gauge: Indicates whether the extinguisher is charged and ready for use.
Hose and Nozzle: Directs the extinguishing agent with precision.
Pin and Seal: Prevents accidental discharge. The pin must be pulled to activate the extinguisher.
The operation of a fire extinguisher can generally be summed up with the PASS technique:
P - Pull the pin: This breaks the tamper seal.
A - Aim low: Pointing the nozzle at the base of the fire.
S - Squeeze the handle: Releasing the extinguishing agent.
S - Sweep: Moving the extinguisher from side to side until the fire is completely out.
These multipurpose fire extinguishers offer versatility in combating various types of fires:
Class A: The extinguishing agent often includes water or a water-based foam, which cools the fire and soaks into the combustible materials.
Class B: Typically, foam, CO₂, or dry chemicals are used to smother flames by cutting off the oxygen supply or interrupting the chemical reactions.
Class C: Dry chemicals or CO₂ are used here, as these agents are non-conductive and safe for use near electrical equipment.
While these fire extinguishers are highly effective for Class A, B, and C fires, they are not suitable for:
Class D Fires: Involving metals like magnesium, titanium, and sodium. Specialized agents are required for these fires.
Class K Fires: Involving cooking oils and fats. These require wet chemical extinguishers specifically designed for such scenarios.
Fire extinguishers are strategically placed throughout buildings to ensure they are readily accessible in an emergency. They are usually located:
Near Exits: To ensure a safe evacuation route.
In High-Risk Areas: Kitchens, workshops, and areas with heavy electrical equipment.
Along Corridors and Common Areas: Ensuring that they are within arm's reach in case of an emergency.
Regular maintenance and inspection are paramount to ensuring the effectiveness of fire extinguishers. Key points include:
