What are the four classifications of fire?
- Fire behaviour
- Direct Contact
- Conduction
- Radiation
- Convection
- Flashover
- Backdraught
- Classes of fire
- How can we prevent fires?
- How we react to fire
What are the four classes of fires?
What are the 4 classifications of fires?
- Class A. A class A fire is burning flammable solids as fuel.
- Class B. Class B fires are burning flammable liquids.
- Class C. Class C fires burn flammable gases.
- Class D. Class D fires are burning flammable metals.
- Electrical. Any fire involving electrical equipment is classed as an electrical fire.
- Class F.
What are the different classes of fire?
- Class A (Solids) Class A fires are fires involving solids.
- Class B (Liquids) Class B fires are fires involving liquids.
- Class C (Gases)
- Class D (Metals)
- Electrical Fires.
- Class F (Cooking Fats & Oils)
What is a Class A fire extinguisher used for?
“A” TRASH–WOOD–PAPER Fire extinguishers with a Class A rating are effective against fires involving paper, wood, textiles, and plastics. The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials.
What are Class A & Class F fires?
Wet chemical extinguishers Although they are primarily designed for use on Class F fires, cooking oils and deep fat fryers. They can also be used on Class A fires (wood, paper and fabrics) and Class B fires (flammable liquids). Wet chemical extinguishers have a yellow label.
What fire extinguisher can be used on class F?
wet chemical fire extinguisherClass F fires should only be treated with a wet chemical fire extinguisher. This type has been tailored specifically to tackle fires caused by fat and oils because they contain potassium salts that work to reduce the heat and smother any oxygen feeding the fire.
What is a Class F fire UK?
Class F fires – are fires involving fats such as used in deep fat fryers. Electrical fires (the letter E is not used.
What are the 5 different classes of fire?
Let's break down each of the 5 different classes of fires more thoroughly.Class A Fires: “Ordinary” Fires. ... Class B Fires: Liquids & Gases. ... Class C Fires: Electrical Fires. ... Class D Fires: Metallic Fires. ... Class K Fires: Grease Fires or Cooking Fires. ... Choose the Right Fire Extinguisher. ... Complete Regular Training.More items...•
What should you not do on a Class F fire?
Class F fire extinguishers should only be extinguished using a wet chemical fire extinguisher. These extinguishers have been specifically developed to tackle fires involving cooking oils and fats and contain potassium salts which both cool the flames and smother the fire's oxygen content.
Can you use a fire blanket on a Class F fire?
Fire blankets are only suitable when the fire is small, or Class F fires. These are especially helpful for Class F fires. These fires are typically caused by cooking fat oils. These types of fires should not be doused with water and you should use a fire blanket to put it out.
What are the 6 classes of fire?
There are 6 different classes of fire, and each should be attacked in a different way.Class A (Solids) Class A fires are fires involving solids. ... Class B (Liquids) Class B fires are fires involving liquids. ... Class C (Gases) ... Class D (Metals) ... Electrical Fires. ... Class F (Cooking Fats & Oils)
What's a Class C fire?
Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical shock. Don't use water. Class D: Certain flammable metallic substances such as sodium and potassium.
Which class of fire is identified as Class F Ryanair?
Class F fires - Cooking oils: Such as fats, cooking oils, grease, etc.
What is Class A in fire?
Class A. Class A fires involve ordinary combustible materials, such as cloth, wood, paper, rubber, and many plastics. Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials.
What extinguisher is Class C?
Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.
What are Class B and C fires?
What types of fires can be extinguished with carbon dioxide (CO2) fire extinguishers? Class B fires which involve flammable liquids and gases, solvents, oils, greases (excluding cooking oils/greases in depth) tars, oil-based paints and lacquers. Class C fires which involve energized electrical equipment.
What is a Type 3 fire extinguisher?
3. Wet Chemical Fire Extinguisher. The wet chemical extinguisher is a specialized type primarily focused on class K fires, those involving cooking media such as animal and vegetable fats or oils. These extinguishers contain a solution composed of potassium that effectively launches a two-pronged assault on fires.
What is CO2 fire extinguisher?
Carbon Dioxide extinguishers are filled with non-flammable carbon dioxide gas under extreme pressure. You can recognize a CO2 extinguisher by its hard horn and lack of pressure gauge. The pressure in the cylinder is so great that when you use one of these extinguishers, bits of dry ice may shoot out the horn.
What extinguisher is Class C?
Extinguishers with a C rating are designed for use with fires involving energized electrical equipment.
Which class of fire is identified as Class F Ryanair?
Class F fires - Cooking oils: Such as fats, cooking oils, grease, etc.
What is a class F fire?
Class F. Fires involving cooking and vegetable oils or fats are Class F fires, and a wet chemical extinguisher with an F-rating of 75, for example, is suitable for use on deep fat fryers containing up to 75 litres of oil. These types of fire usually occur in kitchens and will involve dangerous temperatures. They often start when the oil ...
How to prevent a class F fire?
Preventing a Class F Fire. The safest way to deep fat fry is to use a thermostatically controlled electric fryer. This is what will stop it from getting to a temperature which will cause it to burn. And if you see smoke, it’s getting too hot so immediately turn off the heat.
Why do deep fryers start fires?
They often start when the oil or fat is cooking at an extremely high temperature. Deep fat frying is the most common cause of a fire. They are the source of 20% of accidental fires at home that the fire service attend every year. So when using oil and fat to cook in a pan or deep fat fryer, you need to be aware of the potential risks.
Why do we need fire classification?
Fire classification systems exist to help people trying to extinguish fires. They allow someone to quickly identify which extinguisher will be best suited to the situation. Fire types are classified according to the fuel which is burning.
What to do when a fire is small?
When the fire is small, you might be able to use a fire blanket to put it out. Placing one over a fire in its early stages will smother it of oxygen and prevent a bigger fire.
Why should you never take unnecessary risks with a Class F fire?
You should never take unnecessary risks with a Class F fire because of how dangerous they can be.
Can you throw water over a Class F fire?
Never throw water over a Class F fire as this cause it to explode, spreading the fire and risking lives. The best advice is to get to safety using your emergency evacuation plan, then call the fire brigade. You should never take unnecessary risks with a Class F fire because of how dangerous they can be.
What is the best material to extinguish a class B fire?
The best materials for extinguishing a Class B fire are: Halon: Used to be commonly used in fire extinguishers until the 1990s when it was found to be bad for the Ozone layer. Dry Chemical Fire Extinguisher: Your regular ABC household fire extinguisher is a dry chemical extinguisher capable of fighting Class B fires.
How many different types of fires are there?
There are 5 common classes of fire. Fires are split into these different classifications in order to identify the best ways to suppress them. There are different forms of fire extinguishers used to suppress different types of fires. Make sure you use a fire extinguisher that is the type mandated by your local fire district for your specific establishment and keep it in an approved fire extinguisher cabinet.
What is a class B gas?
Class B: Flammable Liquids and Gases. In the United States, all flammable liquids and gases are classified as Class B. In Europe and Australia, flammable liquids are Class B and flammable gasses are Class C. Flammable liquids and gases are commonly found in garages and workshops.
What is flammable liquid?
Flammable liquids include: Gasoline: The gas (petrol) you put in your car fits in this category. Diesel is also included in this category. Most oils: The oil you put in your car, as well as oils you put on your chainsaw car bike chains are included. Most paints: Oil based paints are considered flammable liquids.
What are some ways to extinguish a fire?
Rubber: such as the rubber found in shoes. To extinguish ordinary combustible fires, it is possible to use most fire suppression techniques, including: Water: Such as water from a garden hose or tap.
What are some examples of combustibles?
Examples of ordinary combustibles include: Wood: such as logs for fireplaces, furniture, and wood building structures. Paper: such as paper you might find in the trash, as well as books on your book shelf. Plastic: such as tupperware containers. Cloth: such as clothing and curtains.
What to do if there is a fire in the area?
If there is an active fire, evacuate yourself from the vicinity of the fire and call your fire emergency hotline immediately. The information in this article is provided for general purposes only and may not best represent your particular needs.
What is a class B fire?
Class B fires are fires involving liquids. Many of the fluids, liquids and chemicals used in workplaces can be flammable or explosive. Like cleaning fluids, solvents, fuels, inks, adhesives and paints. According to statistics, in 2010/11 flammable liquids accounted for only 2% of fires, but a massive 21% of fatalities.
How many different types of fires are there?
Different fires can have different hazards and risks. Use the wrong type of fire extinguisher could do more harm than good. There are 6 different classes of fire, and each should be attacked in a different way.
What is dry powder fire extinguisher?
There are dry powder extinguishers developed to tackle metal fires. The powder inside the extinguisher may vary depending on the type of metal risk it is designed for. Small metal fires can sometimes be smothered with dry earth or sand.
What happens if a fire starts?
Of course, fire prevention is the best way to make sure that fire doesn't impact you or your business. But you should always have a plan in place for dealing with fires if they do happen. If a fire does start, it can spread quickly.
Why is solid fire the most common type of fuel?
This is one of the most common types of fire because solids are the most common type of fuel and one that is hard to eliminate. Good housekeeping should help to keep materials like packaging and waste reduced, minimising risks.
Is electrical fire a class E fire?
Electrical Fires. This is not strictly a class (class E) of fire, because electricity is more or a source of ignition than a fuel. However, fires in live electrical equipment are an additional hazard. You don't want to be using water, or any other conductor as that could be fatal.
Is metal a combustible material?
Metals are not often thought of as a combustible material, some types of metal can be, like sodium. Metals are also good conductors, helping a fire spread. All metals will soften and melt at high temperature, which can be a big problem when metal joists and columns are present in a fire as structural elements.
What is class A fire?
Class A – Class A fires involve solid materials like wood, trash, and textiles. Ordinary combustibles. These fires are most familiar to us and are the most easily extinguished.
What is a Class B or Class 2 fire rating?
A Class B or Class 2 fire rating is the next best rating on the list. The flame spread rating of Class B would fall between 26 and 75. This rating is typical for slower-burning whole wood materials.
What are fire rating classifications?
Fire class ratings are a way of classifying materials by their ability to support and propagate fire and also indicate the smoke produced by the material. This is determined by a flame spread index.
What is the difference between Class 1 and Class 0 fire rating?
You may have seen Class 1 and Class 0 fire ratings being used somewhat interchangeably. They are very similar, with Class 0 essentially being an improvement on a Class 1 material.
What is a Class A fire retardant?
Just as a Class A material has a flame spread rating between zero and twenty-five, a fire retardant has a flame spread rating between zero and twenty-five. The same would hold true for any of the five fire rating classifications.
What is a Class D material?
Ratings between 201 and 500 would be considered a Class D material, and Class E materials include anything with a flame spread rating above 500. Classes D and E are not considered effective against any form of fire exposure.
What are the materials that fall into class A?
Materials that fall into Class A or Class 1 include things like brick, gypsum wallboard, and fiber cement exterior materials. These materials do not burn well and are very unlikely to contribute fuel to a fire.