Fire extinguishers are used in life, work, public places, transportation, etc. So how much do you know about fire extinguishers?
Water extinguisher. It is suitable to save combustible solid material fire, namely class A fire (solid fire).
2. Foam fire extinguishers. It includes chemical foam extinguishers and air foam extinguishers, which are suitable for foam extinguishers.
Saves the lipid, petroleum products, such as class B (liquid) and fire at the beginning of A class (solid) material such as wood of fires, but you can't save class B (liquid), water-soluble fire can save electric equipment and class C (gas) and D (metals) fire.
Chemical foam extinguishers contain acid and alkaline water solution of two chemical agents, air foam extinguishing.
The device is filled with air foam extinguishing agent.
3. Acid and alkali extinguisher. It is an aqueous solution containing 65% of industrial sulfuric acid and sodium bicarbonate.
A fire extinguisher. This kind of fire extinguisher is suitable for the initial fire of A class of material (solid), such as wood, bamboo,
A burning fire of fabric, paper, etc. It can not be used to save the burning of class B material (liquid) fire, nor can it be used to save class C combustible gas or class D light metal fire, but also can not be used for the fire fighting in charged situations.
Carbon dioxide fire extinguishers. It's the vapor pressure of the liquid carbon dioxide that's inside it.
A fire-extinguishing apparatus used to reduce oxygen content, which causes the burning zone to suffocate and extinguish the fire. When oxygen
When the gas content is less than 12% or the co2 concentration reaches 30% ~ 35%, the combustion is aborted. 1kg of liquid, which can produce about 500L of gas at normal temperature and pressure, is enough to extinguish the flame in the lm2 space. Because carbon dioxide is a colorless gas, no traces of fire, and some electrical insulation properties, etc.
Therefore, it is more suitable to save 600V under electric appliances, precious equipment, book files, precision instruments and instruments.
First fire, and generally flammable liquid fire.
Halon extinguisher. Any fire extinguisher, which is filled with halothane extinguishing agent, is called halogen extinguisher.
Halon extinguishing agent mainly by inhibiting the combustion chemical reaction process, so that the combustion interruption to achieve the purpose of fire extinguishing. its
The action is done by removing the active genes from the combustion chain reaction, which is called suppression.
6. Dry powder fire extinguishers. The dry powder fire extinguisher is powered by liquid carbon dioxide or nitrogen. This kind of fire extinguisher can be divided into two categories: common dry powder and multi-purpose dry powder. Common dry powder, also known as BC dry powder, refers to sodium bicarbonate dry powder, modified sodium salt, amino powder, etc., mainly used to extinguish flammable liquid, combustible gas and electric equipment fire; Multi-purpose powder also called ABC dry powder, refers to the dry powder, ammonium polyphosphate ammonium phosphate powder, etc., it is not only applicable to save flammable liquid, flammable gas and electric equipment fire, also suitable for general solid material fire, but cannot save metal fire.