These fires can't be put out with water! (positive pressure SCBA)
Water is the most commonly used extinguishing agent. When a fire breaks out, our first reaction is to put it out with water. But in fact, some fires cannot be put out with water. Different types of fires are put out in different ways.
Grease and alcohol fire grease and alcohol are flammable liquids that are light in water and insoluble in water. When these items catch fire and are watered, the flammable liquid rises to the surface of the water and spreads with the current, causing the fire to spread. For this kind of fire, water is the fuel, extinguishing should use dry powder fire extinguisher or foam fire extinguisher, can also use air isolation method, with wet objects quickly cover the combustion, to achieve the effect of air isolation to extinguish fire.
Electrical fire electrical fire, the first to cut off the power supply, in the case of power failure must not use water or foam fighting, to prevent electric shock or great damage to the equipment. Carbon dioxide, dry powder fire extinguishers or dry sand should be used for fighting, and electrical equipment and wires should be kept at a safe distance.
Chemical dangerous goods fire in the school laboratory often stored a certain amount of sulfuric acid, nitric acid, hydrochloric acid, alkali metal and flammable metal aluminum powder, magnesium powder. These objects are highly susceptible to reaction or combustion when exposed to water and should never be put out with water. Potassium carbide, sodium carbide, aluminum carbide, calcium carbide, potassium hydride, magnesium hydride, etc. react with water and release a large amount of heat, which may cause fire and explosion.
Gas-fired fires, such as liquefied petroleum gas, gas, natural gas, etc., cannot be put out with water. In general, it is necessary to close the pipe valve, cool the vessel and pipe with water, and then choose dry powder and carbon dioxide fire extinguisher to put out the fire.
Oil pot on fire oil pot on fire, do not use water to save. Treating hot oil with water resistance can lead to a “fryer,” where the oil spatters everywhere. The correct way to put out the fire should be the nearest vegetable pot into the fire, you can also use the lid of the oil pot lid, after a period of time, contact less than oxygen on the oil fire naturally extinguished.
In perhaps the most important equipment or fire air breathing apparatus, a good air breathing apparatus for fire suppression personnel’s life will be more a layer of protection, the male positive pressure air breathing apparatus is widely used in fire fighting, chemical, shipbuilding, oil, metallurgy, electric power, warehouse, laboratory, mining and other fire key departments, for the firefighters or rescue and ambulance crews in the smoke, gas, steam and anoxic environments such as safe and effective fire-fighting and rescue and disaster relief and rescue work, is the ideal of firefighters or rescue and ambulance personnel individual respiratory protective device.
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