Different substances have different physical properties and chemical properties, so after they have been burning their own characteristics.
1. A fire (A type of fire)
A common as fire burning flammable solids. Such as timber, cotton, rope, clothing and coal in the fire. Characterized by such fire burning, not only in the surface, but also the internal depth. Fire, if only the surface of the fire extinguished, but there are more than internal combustion, once the conditions are met, will recrudescence. For this type of fire, the main water to rescue.
2. B fire (B class fire)
Flammable liquid or soluble solid fire as B fire, such as oil, paint, alcohol, animal and plant oils such as fire. Only the surface of these fires burning, but the risk of explosion, fire features such burning very fast, temperature too high, easy to cause an explosion, and more use of dry powder, foam, carbon dioxide to fight. Small proportion of oil than water will float in water so that the fire spread.
3. C fire (C type of fire)
Flammable gas fire known as the C fire. Such as liquefied petroleum gas, natural gas and all kinds of fires caused by flammable gases. Flammable and explosive nature of such a large fire and explosion is more dangerous than B Greatest Fire. The more appropriate method for dry powder fire fighting.
4. D Fire (D type fire)
Combustible metal fires caused fire known as the D. Light metals such as potassium, sodium, lithium, etc. caused by fire. Such fires are characterized by high combustion temperature, water allowed to put out, 7150 can be metallic powder (special dry powder) fire fighting sand.
For the electrical fire, such as motors, electrical equipment fires, such fires are not classified in which category. The principle of fire, turn the power off, power off the electrical fire after the fire fighting as a Group, such as no power, should be non-conducting extinguishing agent such as dry powder and carbon dioxide to fight the blaze.
After the electrical power put out the fire with water. Power should not use a non-conducting extinguishing agent such as dry powder and carbon dioxide put out.