Fire extinguisher

A fire extinguisher is a handheld active fire protection device that is used to extinguish or manage minor fires, which occur frequently in emergencies.

Fire extinguishers are typically filled with a dry or wet chemical that can be discharged to extinguish a fire. It should not be used on an out-of-control fire, such as one that has reached the ceiling, endangers the user, or otherwise requires the equipment, personnel, resources, or expertise of a fire brigade.

Fire extinguishers are of two main types: stored-pressure and cartridge-operated The explosive and the firefighting agent are stored in the same room as the pressure units. Cartridge-operated extinguishers have the expellant gas in a different cartridge that is punctured before the extinguisher is released. This exposes the propellant to the extinguishing agent

Fire extinguishers are grouped according to the type of fire that they are intended to extinguish. Fire extinguishers of Class A, Class B, Class C, Class D, and Class K are divided into five different categories. Class A extinguishers are used for fires with common combustibles like wood, paper, or cloth. Class B extinguishers are used in fires that contain flammable liquids like gasoline or oil. For fires involving electrical equipment, Class C extinguishers are used. Flammable metal fires require Class D extinguishers. Cooking oils and fats require Class K extinguishers

Fire extinguishers have limitations, and they should only be used by people who have been trained to use them. It is best to evacuate the area and contact the fire department if you are unsure about how to use a fire extinguisher

How do I use a fire extinguisher?

To use a fire extinguisher, follow the PASS strategy:

  1. Pull the pin: This will break the tamper seal and allow you to discharge the extinguisher.
  2. Aim the nozzle: Point the nozzle at the base of the fire.
  3. Squeeze the handle: This will release the extinguishing agent.
  4. Sweep from side to side: Move the nozzle from side to side, covering the area of the fire with the extinguishing agent.

Fire extinguishers have limitations, and they should only be used by trained professionals. It is best to evacuate the area and contact the fire department if you are unsure about how to use a fire extinguisher

What are the different types of fire extinguishers?

Fire extinguishers come in five main categories, and each is designed to extinguish a different type of fire.

  1. Class A: These extinguishers are used for fires with common combustibles like wood, paper, or cloth.
  2. Class B: “The Entire Entire Entire Entire
    3. Class C: These extinguishers are used for electrical equipment fires.
    4. Class D: These extinguishers are used when flammable metals are in flames.
    5. Class K: These extinguishers are used to extinguish fires that contain cooking oils and fats.

Also, fire extinguishers are classified according to the type of extinguishing agent that is present in them. Here are some common fire extinguisher types:

  1. Water: These water-based extinguishers are used for Class A fires.
  2. Foam: These extinguishers are designed for Class A and Class B fires and have foam that smothers the fire.
  3. Wet Powder: These extinguishers are used for fires of Class A, Class B, and Class C. They contain a dry chemical powder that smothers the fire.
  4. Carbon Dioxide: These extinguishers are used for Class B and Class C fires and contain carbon dioxide gas that displaces oxygen.
  5. Wet Chemical: These extinguishers have a wet chemical that keeps fires cool and stops them from reigniting. Class K fires use them.



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What is the difference between Class A and Class B fires?

Class A fires use common combustibles like wood, paper, or cloth. Class B fires involve flammable liquids such as gasoline or oil

Class A fires and Class B fires differ in the type of fuel that is burned. Class A fires involve solid materials, whereas Class B fires involve flammable liquids or gases.

What is the difference between Class B and C fires?

  1. Class B Fires (Liquids):

Fuel: Class B fires involve flammable liquids like gasoline, alcohol, diesel, or oil (cooking oils not included).
Common Sources: These fires can be caused by substances like solvents, fuels, cleaning fluids, inks, adhesives, and paints.
RisK Level: Class B fires are less common but more fatal than other types.
Protective Actions: To avoid Class B fires, you must know what flammable liquids are used at your place of work. Manage hazardous substances by conducting a COSHH assessment (Control of Substances Hazardous to Health)

2. Class C Fires (Electrical Equipment):

Fuel: Class C fires use electrical parts and equipment as fuel.
Examples: These fires can be caused by walls, overloaded circuits, faulty wiring, or malfunctioning computers or other electrical devices.
Rish Level: Handling live electrical equipment increases the risk of Class C fires.
Safeguards: When handling Class C fires, ensure that the power source is de-energized before using a fire extinguisher.

Fire extinguishers have limitations, and they should only be used by people who have been trained to use them. It is best to evacuate the area and call the fire department if you are unsure about how to use a fire extinguisher.

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