Foam agents work well on combustible materials like wood, paper, and cloth as well as flammable oils, diesel fuel, and alcohols to name a few. They are non-toxic and extinguish the fire by forming a blanket on the surface of the burning hazard, which both cools and smothers the fire by removing the oxygen.
What would you use a foam fire extinguisher for?
What is a foam fire extinguisher used for. AFFF (Aqueous Film Forming Foams) Foam Fire Extinguishers are suitable to fight burning solids such as wood as well as liquid fires such as burning petrol. The foam has the ability to creep over the burning liquid or to soak into burning materials such as settees.
Can I use a foam fire extinguisher on an electrical fire?
Foam extinguishers build up of foam on the surface of the burning liquid, cutting off the oxygen supply to the fire and cooling the hot liquid. Electrical fires: If your foam extinguisher is tested to 35000 Volt (35kV) you can use the extinguishers on live electrical fires. However, keep a safety distance of 1m.
When should you not use a foam fire extinguisher?
Foam extinguishers are also safe for use on flammable liquid fires. They CANNOT be used on electrical fires or flammable metal fires as this extinguisher could end up exacerbating the fire. Foam extinguishers are ideal for premises which have multiple fire risks including offices, factories, warehouses and hotels.
What will happen if you use a CO2 extinguisher and hold the horn?
Unlike other types of fire extinguishers, CO2 extinguishers feature a discharge horn as opposed to a hose. … This is because during operation, the CO2 extinguishing agent causes a standard CO2 horn to frost over. If the horn is held during this time, it can potentially injure the user through freeze burn.
What type of extinguisher should not be used on an electrical fire?
ABC Powder Fire Extinguisher
Powder extinguishers are effective for class A, B and C fires, since it is not an electrical conductor and since it can effectively break the chain reaction in a liquid or gas fire, something a water extinguisher cannot do.
What are the 5 classes of fire extinguishers?
What are the 5 Types of Fire Extinguishers?
- Class A Fire Extinguishers. Class A fire extinguishers are safe for use on ordinary combustible fires, like those fueled by paper or wood. …
- Class B Fire Extinguishers. …
- Class C Fire Extinguishers. …
- Class D Fire Extinguishers. …
- Class K Fire Extinguishers.