What Is Gaseous Fire Suppression?

Gas fire suppression systems include heptafluoropropane, mixed gas IG541, carbon dioxide, inert gas and smoke fire suppression systems.

Gas extinguishing, a fire extinguishing system that extinguishes a fire with a gas extinguishing agent usually at room temperature and atmospheric pressure. Generally it is composed of fire-extinguishing agent storage bottle, control start valve group, conveying pipeline, nozzle and fire detection control system, etc., and some also include inert gas storage bottle for pressure driving. Generally according to the gas extinguishing agent used, there are halogenated fire extinguishing systems, carbon dioxide fire extinguishing systems and steam fire extinguishing systems. ^[1]

Fires Extinguished by Gas Extinguishing Agents:

a: Combustible gas fires, such as methane,

1. carbon dioxide. Carbon dioxide is a colorless and odorless gas in a standard state. It is stored in a sealed container and coexists with liquid and gas under high pressure. Carbon dioxide is an inert compound that does not chemically react with ordinary substances at room temperature and high temperature. However, it can be reduced to carbon monoxide by reaction with coke at high temperature and reacted with alkali metals to reduce carbon dioxide. When fire fighting, carbon dioxide meets with water, it is little soluble in water, and it will not cause corrosion to general substances. ^[3]

2. Haloalkane series fire extinguishing agent. A haloalkane is a halogenated hydrocarbon. This fire extinguishing agent is quickly vaporized after being sprayed in a liquid state, forming a heavy non-combustible gas covering layer, which reduces the oxygen concentration in the surrounding space to suffocate the fire. At the same time, the fire extinguishing agent combines with the active hydrogen groups in the combustion products to make the burning The chain reaction ceased. The concentration of the extinguishing gas mixed with air to extinguish the fire is called the "detonation suppression peak" of the extinguishing agent. Obviously, the smaller the suppression suppression peak, the smaller the amount of the extinguishing agent used to extinguish the fire. The commonly used 1211 and 1301 fire extinguishing agents have no corrosion, no pollution, low toxicity, low boiling point, low critical pressure, and good storage performance. After being pressurized or cooled, the liquefaction is stored in a pressure vessel, and the liquid is colorless and transparent. If it contains water, its corrosiveness to metals will increase by dozens of times. Tests on steel, brass, aluminum and other tests show that it is especially true on brass. Once the gas fire extinguishing agent is used to extinguish the fire and fill the protective space, people must evacuate immediately. At a safe concentration, people can only stay for 1 minute. Safe concentration: "1211" is 4%, and "1301" is 7% to 10%. ^[3]