What is the definition of fire safety?

Common sense of fire safety 200943 III Deduction Studio 2 1. Class A fire refers to the fire in which solid combustible materials containing carbon such as wood, cotton, wool, hemp and paper burn (water is the best fire extinguishing agent); 2. Class B fire, fire caused by burning nails (dry powder, carbon dioxide), class B and class C liquids, such as gasoline, kerosene, diesel, methanol, ether and acetone; Three. Class C fire refers to the fire in which combustible gases such as gas, natural gas, hydrogen, methane, acetylene and propane burn (carbon dioxide); 4. Class D fire refers to the fire of combustible metals, such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloy (special light metal fire extinguisher); Five, charged fire refers to the fire burning charged objects (dry powder, carbon dioxide, do not use water). Types of Fire 200943 Part III Deduction Studio 3 1. Cooling Fire Extinguishing Method The principle of this fire extinguishing method is to spray fire extinguishing agent directly on the burning object, so that the combustion temperature is lowered below the ignition point and the combustion is stopped. Or spray the extinguishing agent on the substance near the fire source, so that a new ignition point will not be formed due to the thermal radiation of the flame. Cooling fire extinguishing method is a main method of fire extinguishing, and water and carbon dioxide are often used as fire extinguishing agents to cool down and extinguish the fire. Fire extinguishing agent does not participate in chemical reaction during combustion, which belongs to physical fire extinguishing method. Basic methods of fire fighting 200943 Part III Deduction Studio 4 II. The principle of this fire extinguishing method is to isolate or remove the burning substance from the unburned combustible materials around it, interrupt the supply of combustible materials, and stop burning because of the lack of combustible materials. The specific method is as follows: 1. Remove inflammable and explosive articles near the fire source; 2. Close the valves of combustible gas and liquid pipelines; 3. Try to prevent scattered flammable and combustible materials; 4. If possible, dismantle flammable buildings near the fire source to form a space area to prevent the fire from spreading. Basic methods of fire fighting 200943 Part III Deduction Studio 5 Part III. The principle of this fire extinguishing method is to prevent air from flowing into the combustion area or dilute the oxygen content in the air with incombustible substances, so that the combustion can not get enough oxygen and stop. The specific method is as follows: 1. Cover flammable materials with sand, cement, wet sacks and wet quilts; 2. Spray atomized water, dry powder, foam and other fire extinguishing agents to cover combustible materials; 3. Filling containers and equipment with inert gases such as steam or nitrogen and carbon dioxide; 4. Seal fire-proof buildings, equipment and holes. The basic method of fire fighting 200943 ● Deductive studio 6 4. The principle of suppression fire extinguishing method is to make the extinguishing agent participate in the reaction process of combustion. For example, use 12 1 1 fire extinguisher to spray combustible materials.