Fire extinguishers are a critical component when it comes to fire safety. They can put out or control a small fire before it becomes dangerous. You have to understand the different types of fire extinguishers and how to use them so that you can ensure an effective fire response.
Understanding different fire extinguishers is a part of first attack firefighting Perth fire training. The most common type of fire extinguisher you will come across is water and this is used for Class A fires which are ordinary combustibles like wood, paper, and cloth. The fire will be cooled by the water. Heat is what sustains the combustion and this is removed by water. These are not suitable for an electrical fire or if the fire is due to flammable liquids. This is because water conducts electricity and the flammable liquids are able to spread when you use water. You can find these types of fire extinguishers used in homes, offices, and other environments. Foam fire extinguishers are a versatile option and this can be used for Class A and Class B fires. Class B refers to flammable liquids like oils, solvents and gasoline. There will be a blanket formed over the fire by the foam and this will separate the fuel from the oxygen leading to the flames cooling down. The foam will prevent re-ignition as well. You can find this in environments where there are flammable liquids and combustible materials such as garages, warehouses and workshops.
A widely used fire extinguisher is
The dry chemical option that can be used for Class A, B, and C fires. It is highly versatile so that it is used in a variety of settings. The two main types of dry chemical extinguishers you will come across are ABC and BC. In ABC dry chemical extinguishers, there is a multi-purpose agent that is able to tackle a fire that is due to electrical equipment, ordinary combustibles and flammable liquids. The chemical reaction of the fire is interrupted by this agent. In BC dry chemical extinguishers, there is a chemical agent that is designed for flammable liquid and electrical fires. This is widely used in commercial kitchens and industrial settings.
For Class B and Class C fires, you can use carbon dioxide fire extinguishers
They can be used for fires that involve flammable liquids and electrical equipment. Oxygen is displaced by carbon dioxide. As oxygen is a critical component in the fire triangle, removing it will stop the fire. These extinguishers are used in server rooms, labs and kitchens where there is a high likelihood of electrical fires and flammable liquids. This will not leave a residue which is why they are recommended for sensitive areas. For class K fires that involves cooking fats and oils, you can use wet chemical fire extinguishers. These have a potassium-based solution that react with the fat and form a soapy layer. This will help in smothering the fire. It prevents re-ignition as well.