Portable fire extinguisher is the first line defense against small fire. We can easily recognize its appearance while we walk through the plant site or building inside it. But the question is “Can these fire extinguishers used to place out any type of fire?”Of course they can not. They can only be used for type of fire as described on its label. Never use the extinguisher for any fire other than what are described on the label.Type of fire extinguishersTo choose proper types, choose according to types of fires:Class A are suitable for ordinary combustible supplies such as paper, wood, fabric, rubber and most plastics. The numerical rating for this type is 2-A. It indicates that the extinguisher can extinguish fire as much as 2-1/2 gallon water on ordinary combustible materials.Class B are suitable for fire involving flammable or combustible liquids and gases, such as gasoline, kerosene, fuel oil and grease. The numerical rating for this type of extinguisher is 10-B, which indicates the extinguisher can diminish fire of region around 10 square feet.Class C are appropriate for fire involving all electrical-energized equipments, such as appliances, breaker, wiring and circuit breakers. The numerical code for this type of extinguisher is C, which means not conductive extinguisher agent.Class D are devoted only for fires that involve combustible metal such as magnesium, titanium, potassium and sodium. These metals are generally found in laboratory. This extinguisher type has no numerical rating.In addition to the above types, a multi purposes fire extinguisher is also accessible. An instance of it is class A, B, C extinguishers and is recommended for used inside building exactly where many types of fires encountered.Chemical contents of extinguishersEvery extinguisher type consists of various extinguisher agent. Lets talk one by one of chemical contents of extinguishers.Water. Water extinguisher and air-pressurized water is only suitable for Class A extinguisher. Water extinguishers are filled with water and pressurized oxygen. By no means use water extinguisher for extinguish fire involving electrical fires or class D fires! It will not put out the fires, it will make the fires spreading and obtaining larger!Foam or powder. Fire extinguishers, which are filled with foam or powder and pressurized with nitrogen, is usually called by dry chemical extinguishers. Dry chemical fire extinguishers are accessible in BC type and ABC type. BC type chemical is sodium bicarbonate or potassium bicarbonate, which is mildly corrosive. ABC type is filled with monoammonium phospahate, which is a sticky yellow powder and can damage electrical appliances. Dry chemical extinguishers are suitable for class A, B and C fires.Did you enjoy this short article regarding type of fire extinguisher singapore?