At Firesolve, we provide extensive training on the proper usage of fire extinguishers; but when is it appropriate to use each one? In this blog, we will break down the classes of fire, and explain how each should be tackled.
Class A Fires
These fires are most common in offices – they are fuelled by solid combustibles, like cardboard and wood. Class A fires spread rapidly in settings like this with abundant fuel, and can be difficult to control. They can be extinguished with water fire extinguishers.
Class B Fires
Class B involves flammable liquids, like petrol or solvents. They are controlled with either foam or dry powder extinguishers, with great care; they are often very quick to start and spread.
Class C Fires
Flammable gases are the source of Class C fires, such as natural gases. This is why storing gases safely and handling them with great care is so incredibly important for workplace safety. If Class C fires break out, a dry powder extinguisher should be used, and the gas should be switched off immediately.
Class D Fires
This class of fire is ignited with flammable metals, like magnesium and sodium. They can be extremely intense, and softening metal can impact the structural integrity of the building. A dry powder extinguisher is once again required here, as water can worsen a burning metal fire.
Class F Fires
Cooking oils and grease fires are known as Class F, and typically break out in commercial or domestic kitchens. They can be caused by oil heating up too quickly, and as a result any form of cooking should never be left unattended. Agitated hot oil also tends to splash, which can spread flames and cause severe burns. A wet chemical extinguisher is the only appropriate choice for controlling Class F fires, as it creates a barrier between oxygen and the oil.
Electrical Fires
Appliance fires, including photocopiers and computers, are incredibly hazardous. Once ignited, they can be fuelled by whatever is around them, particularly in an office setting. A carbon dioxide fire extinguisher is needed, or a dry powder extinguisher, and the electricity should be shut off as soon as possible.
To discuss fire extinguisher training, you can contact Firesolve here.