2. Class B fire: refers to liquid fire and fusible solid material fire. Such as gasoline, kerosene, diesel, methanol, ethanol, asphalt, paraffin and other fires.
3. Class C fire: refers to gas fire. Such as gas, natural gas, methane, ethane, propane, hydrogen and other fires.
Fire refers to a catastrophic burning phenomenon that gets out of control in time or space. Among the various disasters, fire is one of the most frequent and common major disasters that threaten public safety and social development.
Extended information: 1. Principles of combat.
Fire classification (GB T 4968-2008, issued on November 4, 2008, implemented on April 1, 2009) is divided into six categories of combustibles A, B, C, D, E, and F according to the type of fire and combustion. Category.
1.Extinguish Class A fires.
You can choose water fire extinguishers, foam fire extinguishers, ammonium phosphate dry powder fire extinguishers, and halide fire extinguishers.
2.Extinguish Class B fires.
Foam fire extinguishers (chemical foam fire extinguishers are limited to extinguishing non-polar solvents), dry chemical fire extinguishers, halide fire extinguishers, carbon dioxide fire extinguishers.
3.Extinguish Class C fires.
Fire extinguishing agents such as dry powder, water, and heptafluoropropane can be used.
4.Extinguish Class D fires.
You can choose a powdered graphite fire extinguisher, a special dry powder fire extinguisher, or a dry sand or cast iron filings fire extinguisher instead.
5.Extinguish Class E fires.
You can choose dry powder fire extinguishers, halide fire extinguishers, carbon dioxide fire extinguishers, etc. Fires include household appliances, electronic components, electrical equipment (computers, copiers, printers, fax machines, generators, motors, transformers, etc.).
Fires involving wires and cables that are still live when burned do not fall within the scope of live fires.
6.Extinguish Class F fires.
Dry chemical fire extinguisher is optional.
2. Classification of fire extinguishing tools.
It can be divided into: portable type and cart type; According to the power source of driving the fire extinguishing agent, it can be divided into: gas cylinder type, pressure storage type, and chemical reaction type; According to the filled fire extinguishing agent, it can be divided into: foam, dry powder, halide alkane, carbon dioxide, acid and alkali, water, etc.
1.Foam fire extinguisher.
It is suitable for extinguishing general Class B fires, such as oil, grease and other fires. It is also suitable for Class A fires, but cannot extinguish fires involving water-soluble flammable and flammable liquids in Class B fires, such as alcohols, esters, ethers, ketones, etc. and other material fires; It also does not extinguish live equipment and Class C and D fires.
2. Acid and alkali fire extinguisher.
It is suitable for extinguishing initial fires that burn Class A substances, such as fires burning wood, fabrics, paper, etc., and cannot be used to extinguish fires burning Class B substances, nor can it be used to extinguish Class C combustible gas or Class D combustible gas light metal fires. At the same time, it cannot be used to extinguish fires on live objects.
3. Carbon dioxide fire extinguisher.
It is suitable for extinguishing the initial combustion of flammable liquids and gases, as well as the fire of live equipment; It is often used in laboratories, computer rooms, substations, and places with high maintenance requirements for precision electronic instruments, valuable equipment or items. Place.
4. Dry powder fire extinguisher.
Sodium bicarbonate dry powder fire extinguisher is suitable for extinguishing flammable and combustible liquids, gases and electrical equipment in the initial fire; Ammonium phosphate dry powder fire extinguishers can extinguish not only the above-mentioned types of fires, but also the initial fires of solid materials. But none of them can extinguish the flames of metal burning.