Foam fire extinguishers can be used on Class A and B fires. They are most suited to extinguishing liquid fires such as petrol or diesel and are more versatile than water jet extinguishers because they can also be used on solids such as wood and paper.
Is fire extinguishers A foam?
Firefighting foam is a foam used for fire suppression. Its role is to cool the fire and to coat the fuel, preventing its contact with oxygen, resulting in suppression of the combustion. Fire-fighting foam was invented by the Russian engineer and chemist Aleksandr Loran in 1902.
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.
Which fire extinguisher uses foam?
An alternative to water and dry chemical extinguishers for Class A and B fires is a foam extinguisher. 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.
What kind of foam is in a fire extinguisher?
FOAM: A fire fighting foam is simply a stable mass of small air-filled bubbles, which have a lower density than oil, gasoline or water. Foam is made up of three ingredients – water, foam concentrate and air. When mixed in the correct proportions, these three ingredients form a homogeneous foam blanket.
What must you not use water and foam extinguishers on?
Don’t Add Water
Never use a water extinguisher on electrical fires or any fire involving a flammable liquid. As any science student will tell you, water conducts the current. If you spray water onto an electrical fire, inadvertently or intentionally, you risk electrocuting yourself.
Which type of fire extinguisher should not be used for fire in electrical equipment?
Electrical fires need to be put out by a substance that is non-conductive unlike the water or foam found in class A fire extinguishers. If someone attempts to put out an electrical fire with something like water, there is a high risk of electrocution since water is conductive.
How does a foam extinguisher put out fire?
Foam Fire Extinguishers provide a fast, powerful means of tackling flammable liquids. They do so by creating a blanket of foam that smothers the fire, cutting of its supply of oxygen of oxygen and contains the flame preventing re-ignition.
Is foam good for electrical fires?
Foam fire extinguishers are suitable for use on class A and class B fires but but are used in different ways depending on the type of fire they are being used on. … Electrical fires: If your foam extinguisher is tested to 35000 Volt (35kV) you can use the extinguishers on live electrical fires.
Can you use foam on an electrical fire?
In response to your questions – yes, you can use a foam fire extinguisher on an electric fire. Foam fire extinguishers work by expelling a large volume of foam, directly onto the fire.
What is class A foam used for?
Class A foams are used to extinguish fires caused by wood, paper, and brush. Class A foams generally do not contain per- and polyfluoroalkyl substances (also known as “PFAS”).