Class A – Ordinary Combustible Solids Wood, paper, cloth, plastics, rubber, coal, carbon based compounds etc.
Class B – Flammable & Combustible Liquids Petrol, oil, paint, thinners, kerosene, alcohol, etc.
Class C – Flammable Gases L.P.G., Butane, Acetylene, Hydrogen, natural gas and Methane etc.
Class D – Combustible Metals Magnesium, aluminium, sodium or potassium etc.
Class E – Electrically Energised Equipment Computers, switchboards, power-boards, etc.
Class F – Cooking Oils and Fats Cooking oils and fats usually in industrial kitchens.