Common portable fire extinguishers use methods and precautions

Portable fire extinguishers are our most common fire extinguishers and the fire extinguishers we are most likely to use. Here we introduce two commonly used portable dry powder fire extinguishers and carbon dioxide extinguishers.

The sodium bicarbonate dry powder fire extinguisher is suitable for the initial fire of flammable, flammable liquids, gases and charged equipment. The ammonium phosphate dry powder fire extinguisher can be used for the initial fire of solid materials in addition to the above types of fires. But none can save metal fires.

If you are outdoors during extinguishing, you should choose to spray in the upwind direction. If the dry powder fire extinguisher used is of the plug-in type, the operator should grip the spray gun with one hand, and the other hand open the lifting ring on the gas cylinder. If the opening of the gas cylinder is hand-wheel type, unscrew it counterclockwise and rotate it to the highest position, then lift the fire extinguisher. When the dry powder sprayed out, quickly aim at the root of the flame. If the dry powder fire extinguisher used is a built-in gas cylinder or a pressure storage type, the operator should first unplug the safety pin on the opener, then hold the nozzle part at the front end of the spray hose, and the other hand will open the pressure handle. Press down and turn on the extinguisher to extinguish the fire. When using a fire extinguisher or pressurized fire extinguisher with a spray hose, one hand should always press the pressure handle and cannot release it. Otherwise, the injection will be interrupted.

When a dry powder fire extinguisher is used to extinguish flammable and flammable liquids, fire should be directed at the main part of the fire. If the liquid fire that is being extinguished burns, it should be directed at the root of the fire from near to far, and shoot it from side to side until the flame is completely extinguished. If the flammable liquid is combusted in the container, the user should aim at the root of the fire and shake it so that the flow of sprayed powder covers the entire surface of the opening of the container; when the flame is driven out of the container, the user should continue to spray until the flame is completely extinguished. . When flammable liquids are fired in a fire-fighting container, care should be taken not to direct the nozzles directly at the liquid surface to prevent the impact of the jets from spilling flammable liquids to expand the fire and cause difficulty in extinguishing the fire. If the flammable liquid is burned in the metal container for a long time, the wall temperature of the container is higher than the autoignition point of the flammable liquid. This can easily cause the phenomenon of re-ignition after fire extinguishing. If used together with a foam fire extinguisher, the fire can be extinguished. Better results.

When using ammonium phosphate dry powder fire extinguishers to fight solid flammable materials, fire should be directed at the place where the combustion is most intense, and fire should be performed up and down and left and right. If conditions permit, the user can use the fire extinguisher to spray along the four sides of the combustion, so that the dry powder fire extinguishing agent evenly sprayed on the surface of the combustion until the flame is completely extinguished.

How to use: Dry powder fire extinguisher should be turned upside down several times before use to loosen the dry powder inside the barrel. Then remove the seal, unplug the insurance pin, hold the nozzle in the left hand, and press the handle in the right hand. At a distance of two meters from the flame, the right hand presses down on the pressure handle, the left hand swings the nozzle, and the spray dry powder covers the combustion. District until the fire is all extinguished. Due to the cooling effect of dry powder, fire must be prevented after the fire.

Portable dry powder fire extinguishers are easy to use, inexpensive, and long-lasting and are selected for the average family. It can not only save the initial fire of gas stoves and liquefied gas cylinder angle valves, but also can prevent the fire of solid flammable substances such as the fire of the pan and waste paper baskets.