Hazard characteristics of oxygen and emergency measures

Hazardous characteristics: Oxygen cylinders are exposed to sunlight or stored in a high temperature environment, or wrestling during handling. It is easy to vaporize and expand the liquefied oxygen in the cylinder, which may cause the cylinder to burst. Oxygen itself does not burn, but it can help combustion, and it can form an explosive mixture with organic matter or other easily oxidizable substances. If it comes into contact with oil, it will react to heat. When this heat is accumulated to a certain extent, it can spontaneously ignite. Mixing with flammable gases such as oxygen and acetylene can form an explosive mixture. When liquid oxygen and combustibles are stored together, especially under high pressure, there is a danger of explosion. Liquid oxygen is easily absorbed by clothing, wood, paper, etc. Oxygen is non-corrosive, but it promotes corrosion of metals when moisture is present. The gas itself is non-toxic, and healthy people inhaled pure oxygen for 3 hours. It is generally considered that it has no effect, but if it is inhaled for a longer period of time or above 202.65-303.98kpa (2-3atm), continuous inhalation of high concentration oxygen may cause "oxygen poisoning". disease". When the skin is exposed to liquid oxygen, it can cause severe frostbite and cause tissue damage.

Fire-fighting measures: Keep the container cool with water to prevent it from exploding, which will greatly encourage the fire. Quickly cut off the air source, spray it with water to protect the person who cut off the air source, and then choose the appropriate extinguishing agent to extinguish the fire according to the cause of the fire.

Accidental release measures: Rapid evacuation of personnel from the contaminated area to the upper reaches, isolation and strict restrictions on access. Cut off the fire. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and wear general working clothes. Avoid contact with combustibles or flammable materials. Cut off the source of the leak as much as possible. Proper ventilation and accelerated diffusion. The leaking container should be properly disposed of, repaired, and used after inspection.