Gas mask, gas mask and air respirator belong to respiratory protective equipment type, but there are great differences in their application occasions. From the three aspects of protection grade, concentration of toxic substances and application occasion, this paper explains their use conditions and restrictions:
1. protection grade
gas mask is the lowest protection grade among the three, Now there are so-called gas masks on the market, which are mainly used to prevent trace organic gas, acid gas and toxic metal radioactive particles. So what is organic gas? Organic gas generally refers to benzene, gasoline, acetone, carbon disulfide and ether chemicals in paint; Acid gases such as sulfur dioxide, chlorine, hydrogen fluoride and other toxic gases
the protection level of gas mask is medium, and different toxic substances can be prevented, so the filter box can be selected for use. At present, the gas mask can effectively protect organic gas, acid gas, ammonia, formaldehyde, mercury vapor and other toxic gases
the air respirator has the highest safety factor, because its anti-virus principle is different from that of gas masks and gas masks. 1t is not a filter type anti-virus, but directly isolates the respiratory system from the external toxic environment2. The concentration of toxic substances
the anti-virus mask is suitable for the environment where the concentration of harmful substances does not exceed 10 times of the occupational exposure limit. 1f the toxic particles in the environment are high substances, carcinogens or radioactive, the anti-virus mask with the highest filtration efficiency should be selected, such as N100 anti-virus mask
if you know the types of toxic substances in the environment, and the concentration of harmful substances is less than 2%, and the oxygen concentration is greater than 18%, you can choose gas masks
when the toxic substances in the environment are unknown and the oxygen concentration is lower than 18%, the air respirator should be selected< (3) use occasions of gas masks, gas masks and air respirators gas masks are generally used in printing factories, chemical laboratories, paper mills and breweries. 1t is recommended to use gas masks for those with obvious toxic odor with different filter boxes, the gas mask can be used more comprehensively to protect toxic substances. Because the body of the gas mask can be used repeatedly, only more filter boxes are needed, so the overall cost is lower. 1t is generally used in pesticide spraying, spray painting, chemical operation and hazardous chemicals transportation air breathing apparatus is widely used in fire fighting units and petroleum smelting industry, and it is also used in sewer, sewer, cellar or underground operation summary: the common feature of gas mask, gas mask and air respirator is that they can prevent toxic substances to a certain extent. However, they are not omnipotent. Once they find that they are not breathing well or the respirator alarms, they need to go to the safe area immediately to avoid poisoning, suffocation and other safety accidents