State regulations on portable dry chemical fire extinguishers

How to use: When extinguishing the fire, you can quickly go to the fire with a portable or shoulder-carrying fire extinguisher, and put down the fire extinguisher about 5 meters away from the burning place. If you are outdoors, you should choose to spray in the upwind direction.

If the dry chemical fire extinguisher used is an external pressure storage type, the operator should hold the spray gun with one hand and lift the opening ring on the gas cylinder with the other hand. If the cylinder is opened on a handwheel, unscrew it in a counterclockwise direction to the highest position and lift the fire extinguisher. When the dry powder is sprayed, it is quickly aimed at the root of the flame.

If the dry chemical fire extinguisher used is a built-in gas cylinder or a pressure storage type, the operator should first remove the safety pin on the opening handle, then hold the nozzle at the front end of the spray hose, and press down the opening pressure handle with the other hand to open the fire extinguisher to extinguish the fire. When using a fire extinguisher or a pressure storage fire extinguisher with a jet hose, one hand should always press down the pressure handle and not let go, otherwise the spray will be interrupted.

When the dry powder fire extinguisher extinguishes a combustible and flammable liquid fire, it should be aimed at the flame point, and if the liquid fire to be extinguished is flowing and burning, it should be aimed at the root of the flame from near to far, and swept left and right until the flame is completely extinguished. If the flammable liquid burns in the container, the user should aim at the root of the flame and shake it left and right to strafe so that the ejected dry powder stream covers the entire surface of the container opening; When the flame is driven out of the container, the user should continue to spray until the flame is completely extinguished. When extinguishing the fire of the combustible liquid in the container, it should be noted that the nozzle should not be sprayed directly at the liquid level, so as to prevent the impact of the jet from splashing out the combustible liquid and expanding the fire, resulting in difficulty in extinguishing the fire.

If the combustible liquid burns in the metal container for too long, the wall temperature of the container is higher than the spontaneous ignition point of the combustible liquid, which is easy to cause the phenomenon of re-ignition after extinguishing the fire.

When using an ammonium phosphate dry powder fire extinguisher to extinguish a solid combustible fire, it should be sprayed at the place where the combustion is most violent, and swept up and down, left and right. If conditions permit, the user can carry the fire extinguisher and spray along the four perimeters of the combustible, so that the dry powder fire extinguishing agent is evenly sprayed on the surface of the combustible until the flame is completely extinguished.

Expiration date. Portable dry chemical fire extinguisher (gas cylinder type) 8 years;

10 years of portable storage pressure dry powder fire extinguisher;

Scope of application. Sodium bicarbonate dry powder fire extinguisher is suitable for flammable, combustible liquid, gas and live equipment for initial disasters; In addition to the above-mentioned types of fires, ammonium phosphate dry powder fire extinguishers can also be used to extinguish the initial disaster of solid substances. But none of them can extinguish metal burning fires.

Reference standards. GB L97 Common Thread Tolerances and Fits (Ø 1 355mm).

GB 1804 Tolerance and Limit Deviation of Mating Unspecified Tolerance Dimensions.

GB 2828 Batch-by-batch inspection of counting sampling procedures and sampling tables (applicable to continuous batch inspections).

GB 2829 Cycle Check Counting Sampling Procedures and Sampling Tables (Suitable for checking the stability of the production process.)

GB 3323 Steel Melting Welded Butt Joints Radiography and Quality Grading.

GB 3864 Gaseous Nitrogen for Industrial Use.

GB 4066 sodium bicarbonate dry powder fire extinguishing agent.

GB 4351 General technical specifications for portable fire extinguishers.

GB 4402 portable dry chemical fire extinguisher.

ZB C84 006 ammonium phosphate salt dry powder fire extinguishing agent.

GN 11 fire protection product model compilation method.

Portable dry powder fire extinguisher is suitable for flammable, combustible liquids, gases and live equipment for the initial disaster; In addition to the above-mentioned types of fires, portable dry powder fire extinguishers can also be used to extinguish the initial disaster of solid substances. But none of them can extinguish metal burning fires.

Fire extinguishing principle. Dry powder fire extinguishing agent mainly extinguishes the fire through the physical and chemical action that occurs when the powder mist sprayed out under the action of pressurized gas is in contact with the flame and mixes: first, the volatile decomposition of inorganic salts in the dry powder is chemically inhibited and paracatalytic with the free radicals or active groups produced by the fuel during the combustion process, so that the chain reaction of combustion is interrupted and the fire is extinguished; Second, the powder of dry powder falls outside the surface of combustibles, undergoes a chemical reaction, and forms a glass-like covering layer under the action of high temperature, thereby isolating oxygen, and then suffocating and extinguishing the fire.

In addition, there is a partial dilution of oxygen and cooling.

Scope of application. 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.

a.Aim at the root of the flame (correct answer).

b.From near to far (correct answer).

c.Swing from side to side.

d.You can't put the nozzle directly at the He Gao sedan chair to burn the liquid surface (correct answer).

Dry chemical fire extinguishers can extinguish general fires, and at the same time, they can also extinguish fires caused by the combustion of oil, gas, etc. Dry powder fire extinguisher is a kind of fire extinguisher, which is mainly divided into ordinary dry powder fire extinguisher and ultra-fine dry powder fire extinguisher, which has the characteristics of easy fluidity and dryness, and can be very effective in fighting the initial disaster.

Dry powder fire extinguisher is a more common fire extinguisher in life, it has a wide range of use, general fires can be extinguished by using dry powder fire extinguishers, hold the stove pin but pay attention to the best use in the initial disaster, it can be very effective in fighting the initial disaster.

Dry chemical fire extinguishers can also be used to extinguish fires caused by oil, gas and other combustion, if the fire is caused by oil or gas, etc., dry powder fire extinguishers can be directly used to extinguish at the initial stage. This kind of dry powder fire extinguisher is very common and widely used at home and abroad.

Features of dry chemical fire extinguishers:

Dry chemical fire extinguishers have the characteristics of easy fluidity and dryness. Dry powder fire extinguisher can play a very important role in extinguishing fire, once the fire occurs, it can quickly and effectively control the spread of fire, the fire extinguishing effect is relatively good, it is very common and convenient in life, and it has a high safety defense and stability.

<>1. Take off the dry powder fire extinguisher, hold the bottom of the bottle with one hand, hold the pressure handle with one hand, and then put it lightly on the ground, and put the sprinkler head at 45 degrees to the ground for safety.

2. Remove the dry powder fire extinguisher on the pressure handle, and only remove it can be used.

3. When extinguishing the fire, stand upwind of the fire source, pay attention not to adjust it with your hands in order to adjust the direction when using, and do not touch the nozzle with your hands, you must remember.

4. Then press the nozzle cavity against the place where the fire is fired, and press the handle vigorously with your hands, and the fire can be extinguished after a while.

5. Bring the fire extinguisher to the scene: Quickly go to the ** location with the fire extinguisher, and put down the fire extinguisher at a distance of about 5 meters from the fire source. Tumble up and down a few times before using a fire extinguisher to prevent dry powder from clumping.

6. Then open the seal and pull out the safety pin: at this time, in order to ensure that the fire extinguisher is available, the unopened fire extinguisher is in a protective state and cannot be used normally.

7. Hold the nozzle of the fire extinguisher with your left hand and press the handle with your right hand to ensure that the fire extinguisher is upright and aimed at the bottom of the fire source to extinguish the fire at the upwind outlet.

8. During the fire extinguishing process, gradually control the fire from near to far, and pay attention to continuous pressure with the right Xiaoxiang hand to ensure the normal spraying of dry powder.

9. After the dry powder fire extinguisher is extinguished, pay attention to the re-ignition of the fire source, so as to completely extinguish the fire, and pay attention to safety by means of water fire extinguishing, and do not cause other injuries due to fire extinguishing.

The method of using the hand-held dry powder fire extinguisher is ().

a Remove the fire extinguisher and unplug the safety pin (correct answer).

b Hold the pressure handle with one hand and hold the nozzle with the other (correct answer) c Aim at the root of the flame (correct answer).

d Person stands upwind (correct answer).