Knowledge popularization: Classification of fires

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Classification of fires (I) Classification by the nature of the burning material. According to the **Standard for Classification of Fires (GB/T 4968--2008)**, fires are classified into six categories: A, B, C, D, E, and F.   Class A fire: Fire involving solid materials. For example, fires involving wood, cotton, wool, linen, paper, etc.   Bt fire: Fire involving liquid or fusible solid substances. For example, fires involving kerosene, crude oil, ethanol, asphalt, paraffin, etc. Class C fire: Gas fire. For example, fires involving gas, natural gas, methane, ethane, hydrogen, acetylene, etc.   Class D fire: Metal fires. For example, fires involving potassium, sodium, magnesium, titanium, zirconium, lithium, etc.   Class E fire: Fire involving electrical current. A fire in which an object burns due to being charged. For example, electrical fires in equipment such as transformers.   Class F fire: Fires involving cooking materials in cooking appliances (such as animal fats or vegetable fats). (II) Classification according to the extent of damage caused by the fire accident: Number of deaths, number of injured, direct economic losses. Extraordinarily serious fires: ≥30 deaths, ≥100 injuries, ≥100 million yuan in direct economic losses; Serious fires: 29–99 deaths, 5–500 million yuan in injuries, ≤C in direct economic losses