Dry powder fire extinguishers are the most common type of fire extinguishers, it is through dry powder to put out fires, so many people are curious, dry powder in a fire extinguisher is what matter? Next small make up to briefly introduce to you what is the dry powder in the fire extinguisher.
1, The dry powder in the ABC dry powder fire extinguisher is ammonium phosphate. This kind of fire extinguisher can be used to extinguish Class A, B and C fires, that is to say, it can be used to extinguish fires caused by flammable objects, flammable liquids and gases. This type of fire extinguisher is by powder falling on the surface of combustible objects, forming a covering film, by blocking oxygen to extinguish the fire.
2, BC dry powder in the fire extinguisher is sodium carbon bicarbonate dry powder, which can extinguish Class B and C fires, that is to say, fires caused by flammable liquid gas and fires caused by electrified equipment can be put out with BC dry powder fire extinguisher. This type of fire extinguisher is through the volatile decomposition of dry powder, and the combustion of chemical substances produced by the reaction, by interrupting the combustion reaction chain to extinguish fire.
3, the dry powder in the fire extinguisher should be replaced regularly, usually the effective period of dry powder is 1-2 years, everyone should be replaced every 1 or 2 years. In addition, the fire extinguisher also needs to be regularly annual inspection, check whether the nozzle is damaged. If the extinguisher has passed its useful life, it should be scrapped and replaced in time.
4, dry powder fire extinguishers can be divided into two categories, portable and cart, its use is also very simple. When using portable dry powder extinguisher, first turn the extinguisher upside down, remove the safety pin at 2-3 meters away from the fire point, hold the nozzle, press down the handle, aim at the root of the fire point, and spray in parallel. Fire extinguishers should be kept upright during fire fighting.
Summary: about the dry powder fire extinguisher inside what is the dry powder, small make up for you to simply introduce here. Hopefully, by the end of this article, you'll have an idea. Dry powder fire extinguisher dry powder is non-toxic, we can not stand against the wind when using, also can not spray on people, if inhaled dry powder particles, is harmful to the human body.