What are the general types of fire? What fire extinguishers are commonly used to fight fires?

1. Class A fire: refers to a solid material fire. This substance is usually organic in nature and can produce burning embers when burned. Such as wood, coal, cotton, wool, hemp, paper and other fires.

2. Class B fire: refers to the fire of liquid or meltable solid substance. Such as 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.

4. Class D fire: refers to metal fire. Such as potassium, sodium, magnesium, aluminum-magnesium alloy and other fires.

5. Class E fire: live fire. A fire in which an object burns with electricity.

6. Class F fire: fire of cooking objects (such as animal and vegetable oils) in cooking utensils.

Dry chemical fire extinguishers are best suited for extinguishing electrical fires. Dry powder fire extinguishers can extinguish general fires, and can also extinguish fires caused by the combustion of oil, gas, etc. Dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray out the dry powder in the cylinder to extinguish the fire.

Dry powder is a dry, easy-to-flow fine solid powder, composed of a base material that can extinguish fires and additives such as moisture-proof agents, flow accelerators, and anti-caking agents. It is mainly used to extinguish the initial fire of flammable liquids such as petroleum and organic solvents, combustible gases and electrical equipment.

Principle of dry chemical fire extinguisher.

The dry chemical fire extinguisher is filled with ammonium phosphate dry powder fire extinguishing agent. Dry powder fire extinguishing agent is a dry and easy-to-flow fine powder used for fire extinguishing, which is composed of inorganic salts with fire extinguishing effect and a small amount of additives that are dried, crushed and mixed into fine solid powder.

It is a fire extinguishing agent that is widely used in fire fighting and is mainly used in fire extinguishers. In addition to the special dry powder chemical fire extinguishing agent for fighting metal fires, dry powder fire extinguishing agents are generally divided into two categories: BC dry powder fire extinguishing agent (sodium bicarbonate, etc.) and ABC dry powder (ammonium phosphate, etc.).

Dry chemical fire extinguishers and carbon dioxide fire extinguishers are suitable for extinguishing electrical fires.

Electrical fire generally refers to the heat energy released due to the failure of electrical lines, electrical equipment, appliances and power supply and distribution equipment: such as high temperature, arc, electric spark and non-fault released energy;

For example, the red-hot surface of an electric heating appliance ignites the main body or other combustibles under the condition of combustion, and also includes fires caused by lightning and static electricity.

CO2 fire extinguishers are best.

Because electrical fires avoid water, so do not use foam.

Because dry powder will leave residue in the fine parts of the appliance and damage the appliance, carbon dioxide that does not use dry powder will volatilize into gas after use, so carbon dioxide is the best.

1.Dry chemical fire extinguisher: suitable for extinguishing electrical, oil, gas and solid matter fires, it is one of the most common fire extinguishers.

2.Carbon dioxide fire extinguisher: suitable for extinguishing electrical, oil and gas fires, the fire extinguishing effect is better, but you need to pay attention to safety when using.

3.Foam fire extinguisher: suitable for oil extinguishing and solid matter fire, the fire extinguishing effect is better, but you need to be careful not to spray foam to electrical appliances and other easily conductive objects when using.

4.Water fire extinguisher: suitable for extinguishing fires of solid substances such as wood and paper, but not suitable for extinguishing electrical, oil and gas fires.

It is necessary to pay attention to the fact that different types of fires need to use different types of fire extinguishers, and the appropriate fire extinguishers should be selected according to the actual situation, and they should ensure their own safety before extinguishing the fire to avoid accidents.

General fires can be extinguished by water-type fire extinguishers, bubble type foam type fire extinguishers, dry powder type fire extinguishers, carbon dioxide (CO2) type, active emulsifier (AR) type or other special special rescue machinery and equipment for special purposes. Water is the most commonly used method of general extinguishing and can directly pour a large amount of water onto a large amount of flame that is formed. However, for small-scale open flames and early hidden flames, foam or dry powder should be used to extinguish them.

The foam has a very good covering performance, which can form a protective film to cover the flame and prevent it from spreading around; The dry powder has a strong adsorption effect, which can quickly adsorb each of the flames so that it will no longer be conducted.

Generally, fires can be extinguished by foaming fire extinguishers, dry powder fire extinguishers or gas fire extinguishers. Among them, the foam fire extinguisher is suitable for various fire fighting places in fire towns, dry rooms, factories, warehouses, shopping malls, offices and homes; Dry powders and gases are suitable for places that are more harmful to electrical equipment. In addition, there are some special situations that will also be used in different ways to extinguish, such as the chemical Yujian Cave is susceptible to water vapor and can easily cause a large amount of steam.

Generally, fires can be extinguished by using water-type fire extinguishers, foam-type spine extinguishers, or dry powder fire extinguishers. The water-type is the most common, they can effectively reduce the temperature of incinerable substances and can effectively inhibit the spread of incinerable substances. Foam is also a good choice for Sakura, as it can coat it with flammable substances, thus reducing its flammability.

In addition, the dry powder type is also a good choice, as it can quickly draw out the oxygen from the incinerable substance, so that it can heal.

In general, fires can be extinguished using water, foam and dry powder fire extinguishers. Water-type fire extinguishers are the most common, which can be used to extinguish slag and rescue general flammable materials. Foam fire extinguishers are mainly used to extinguish flammable materials caused by solid materials; The dry powder type is for fire protection against volatile flames or harmful gases. Therefore, in general, fires can be extinguished using water, foam or dry powder extinguishers.

The types of fires are generally as follows:

Class A fire: Solid matter fire.

Class B fires: Liquid-li-zi closed bodies or meltable solid matter fires.

Class C fires: gas fires.

Class D fires: metal fires.

Class E fire: live fire.

Category F fire: Fire of cooking objects (such as animal and vegetable fats) in cooking utensils.

1.To extinguish Class A fires, water-type wax, foam, and ammonium phosphate dry powder should be used to extinguish fires.

2.Dry powder, foam, halide alkyl and carbon dioxide fire extinguishers should be used to extinguish Class B fires.

3.Dry powder, halide alkyl and carbon dioxide fire extinguishers should be used to extinguish Class C fires.

4.Halides, carbon dioxide, and dry powder fire extinguishers should be used to extinguish Class D fires.

5.Ammonium phosphate dry powder and halide fire extinguishers should be used to extinguish Class E fires.

6.Foam fire extinguishers should be used to extinguish Class F fires.

1. Foam fire extinguisher.

The foam fire extinguisher forms a foam covering layer on the surface of the combustible, which isolates the surface of the combustible material from the air and plays the role of suffocating and extinguishing the fire. Foam fire extinguishers are suitable for extinguishing fires in wood, cotton, linen, paper, etc., as well as fires in petroleum products and oil; However, it cannot extinguish fires with water-soluble flammable and flammable liquids.

2. Dry powder fire extinguisher.

Dry chemical fire extinguishers eliminate reactive free ions from combustibles, interrupting the chain reaction of combustion. Dry chemical fire extinguishers are suitable for extinguishing combustible liquids, gases, electrical fires and fires that are not suitable for water extinguishing. ABC dry chemical fire extinguishers can extinguish live material fires.

3. Carbon dioxide fire extinguisher.

Carbon dioxide fire extinguishers are suitable for extinguishing fires of electrical equipment, precision instruments, books and archives, as well as fires of oil, gas and some substances that cannot be extinguished with water.

Fire extinguisher. The main thing is to inhibit the chain reaction of combustion and stop combustion. At the same time, it has a certain cooling and suffocation effect. It is suitable for extinguishing fires of flammable and combustible liquids, gases and live equipment, as well as fires on the surface of solid substances, especially for fighting fires in precision instruments, computers, precious cultural relics and warehouses of precious materials, and can also extinguish the initial disasters of aircraft, automobiles, ships, hotels and other places.

Fire classification: 1. Class A fire: refers to solid material fire. This substance tends to be organic in nature and generally produces hot embers when burned. Such as wood, coal, cotton, wool, hemp, paper and other fires.

2. Class B fire: refers to liquid fire and meltable solid matter 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.

4. Class D fire: refers to metal fire. Such as potassium, sodium, magnesium, aluminum-magnesium alloy and other fires.

5. Class E fire: refers to the fire of live objects and precision instruments and other substances.

Dry chemical fire extinguishers, foam fire extinguishers, carbon dioxide fire extinguishers, oils, electrical appliances, and ordinary fires Self-employed Q user: Mr. Liu.

Foam fire extinguishers are divided into two types: anti-solvent fire extinguishers and water-soluble fire extinguishers. Thank you Self-employed Q user: Mr. Chung.

The types of fire extinguishers and the applicable fire types are:

1. Portable foam fire extinguisher.

Foam fire extinguishers are suitable for extinguishing the initial disaster of oil and general substances. When using, hold the lifting ring of the fire extinguisher with your hand, and lift it to the fire scene smoothly and quickly, do not carry it horizontally or horizontally. When extinguishing the fire, hold the ring with one hand and the bottom edge of the barrel with the other hand, turn the fire extinguisher upside down, aim the nozzle at the fire source, and shake it vigorously a few times to extinguish the fire.

2. Portable carbon dioxide fire extinguisher.

Carbon dioxide fire extinguishers are suitable for extinguishing the initial disaster of precision instruments, electronic equipment and electrical appliances below 600 volts. Portable CO2 fire extinguishers can be used in two ways, namely handwheels and duckbills.

3. Portable dry powder fire extinguisher.

Dry powder fire extinguishers are suitable for extinguishing initial disasters such as oil, combustible gas, and electrical equipment. When using, first open the safety pin, hold the nozzle with one hand, aim at the fire source, and pull the pull ring with the other hand to extinguish the fire source.

4. Portable "1211" fire extinguisher.

The 1211 "fire extinguisher is suitable for extinguishing the initial disaster of valuables such as oil, instruments and cultural relics files. When using, first tear off the aluminum seal, pull out the safety safety pin, hold the bottom of the fire extinguisher with one hand, hold the pressure handle switch with the other hand, aim the nozzle at the fire source spray, release the pressure handle, and the spray will stop.

Do you know what fire extinguishing agents are? What are the types of fire extinguishing agents? Fire extinguishing agents can be divided into three categories, liquid fire extinguishing agents, gas fire extinguishing agents and solid fire extinguishing agents. 1.Liquid fire extinguishing agents The vast majority of these fire extinguishing agents are mixtures of aqueous solutions of various chemical compounds.

Classification according to the form of combustion substances:

Class A solid fires.

Class B flammable liquid or meltable solid fire.

Class C combustible gas fires.

Class D active metal fires.

Class E live fires.

Class F cooking fires.

Electrical fires are classified as Class C fires

Selection of Class C fire extinguishers: Class C fire sites should choose ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers, halide fire extinguishers or carbon dioxide fire extinguishers, but carbon dioxide fire extinguishers equipped with metal horn canisters should not be selected.

Chemistry. Reactive type, according to the filled fire extinguishing agent can be divided into: foam, dry powder, halide alkane, carbon dioxide, acid and alkali, water, etc.

The three types of fire extinguishers, ABC, BC and BCD, correspond to the following five fire types respectively.

The types of fires are divided into the following 5 categories according to the ignition substance and its combustion characteristics:

Class A fire: refers to the fire of burning carbon-containing solid combustibles, such as wood, cotton, wool, hemp, paper, etc.;

Class B fire: Nails, B and C liquids, such as gasoline, kerosene, diesel, methanol, ether, acetone, etc.;

Class C fire: refers to the fire of combustible gas, such as gas, natural gas, methane, propane, acetylene, hydrogen, etc.;

Class D fire: refers to the fire of burning combustible metals, such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloys, etc.;

At present, dry powder fire extinguishing agents on the market are generally divided into two categories: BC dry powder and ABC dry powder, and BCD dry powder for extinguishing class D fires is rarely produced now; Although the fire extinguishing efficiency of ultra-fine dry powder is far greater than that of ordinary ABC dry powder, its fire extinguishing category is the same as that of ordinary ABC dry powder fire extinguishing agent, which can extinguish ABC fires and live equipment fires.

1. BC dry powder fire extinguishing agent: BC dry powder can extinguish BC fire. It is suitable for the initial fire of flammable and combustible liquids, gases and live equipment, and is not suitable for the fire of solid substances.

Therefore, in the power distribution room, kitchen, computer room and other places prone to combustible liquid gas fire and live fire, BC dry powder fire extinguishing agent can be equipped. But these sites are often not simply liquid and gas fires; Therefore, most of these places are also equipped with ABC dry chemical fire extinguishing agents.

2. ABC dry powder fire extinguishing agent: this kind of fire extinguishing agent can extinguish solid, liquid, gas and live equipment fires, and has the widest range of applications. It can be used in all kinds of public places, offices, hotels, restaurants, cars, ships and even homes, but it shall not be used to extinguish metal fires.

At present, there are many places that should be equipped with ABC dry powder fire extinguishing agent, but they are mistakenly equipped with BC dry powder; For example, some hotels are equipped with fire extinguishers are all BC dry powder, and from the comprehensive study of the fire situation, most of the hotel fires are combustible solid material combustion, at this moment if the BC dry powder fire extinguisher is used to extinguish the fire, the effect will not be significant, and may even delay the fire extinguishing time, resulting in greater economic losses.