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Employers are generally required by 29 CFR 1910 to provide portable fire extinguishing equipment for use in fighting incipient stage fires in the workplace. 29 CFR 1910.157, however, provides alternatives for employers who do not want their employees to fight incipient stage fires in the workplace.

When the knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium hydrogen carbonate solution to produce carbon dioxide gas which forms a blanket around the burning substance and cuts off the supply of air to the burning substance. This stops the process of burning and fire gets extinguished.

When it comes to the types of fire extinguishers, there are five main types including wet chemical, CO2, dry powder, foam and water. In order to meet the current regulations, it is important for you to have the exact type of fire extinguisher that is needed for your premises.

The six main fire extinguisher types are water, foam, CO2, powder, water mist and wet chemical. Each of the different types of fire extinguisher is suitable for different fire classes.

The six main fire extinguisher types are water, foam, CO2, powder, water mist and wet chemical. Each of the different types of fire extinguisher is suitable for different fire classes. It is important that you purchase the right fire extinguisher for your needs.

Class A – fires involving solid materials such as wood, paper or textiles. Class B – fires involving flammable liquids such as petrol, diesel or oils. Class C – fires involving gases. Class D – fires involving metals.

An extinguisher with an ABC rating is suitable for use with fires involving ordinary combustibles, flammable liquids and energized electrical equipment. An extinguisher that is rated for use with multiple hazards should include a symbol for each hazard type.

A foam based fire extinguisher contains aluminium sulphate and sodium bicarbonate in separate chambers. The two chemicals mix and react to form carbon dioxide and aluminium hydroxide, which comes out together through the nozzle as foam.