Industrial oxygen generally only requires oxygen purity, no special requirements for other health conditions, at the same time, it also contains excessive carbon monoxide, methane and other harmful gases, moisture, bacteria and dust content is also very high, industrial oxygen is mainly used for welding, gas welding, gas cutting and so on.

The biggest difference between medical oxygen and industrial oxygen is the control of the moisture in the oxygen. We often have this experience in life, after the surface is smooth, there is no rust in the open air for a long time will not rust, but after a heavy rain will rust. This is because oxygen only oxidizes large amounts of iron molecules in the presence of water. And after iron oxidation, not only rust but also hydrogen and other harmful gases to the human body will be discharged. Iron is oxidized to form rust, rust is very loose, it is easy to form small particles mixed with oxygen. It is inhaled by the patient and causes respiratory tract damage such as infection. Therefore, it is extremely important to minimize the moisture content of oxygen in medical oxygen production.

Industrial oxygen is a gas used for industrial production and product processing, and the quality requirements are lower. The purity is generally required to be above 99%. Filling procedures are not as strict as medical oxygen, often there will be water and other impurities mixed and residual in the cylinder oxygen cylinder, mixed and residual water in the cylinder will lead to corrosion of the inner wall of the cylinder, so that the bottle gas with odor.

The smelling method is not very effective for the industrial oxygen filled with new oxygen cylinders, because the oxygen cylinder filled with medical oxygen and the oxygen cylinder filled with industrial oxygen at the beginning of use, it is difficult to find the difference through human smell, but with the passing of time, the degree of rust in the industrial oxygen cylinder gradually deepens, slightly open the switch of the oxygen cylinder (the switch cannot be opened too large). It can smell strong sulfur, rust, or acid, most likely not medical oxygen. (Due to the rubber sealing ring in the oxygen cylinder valve body, it is normal for individual oxygen cylinders to smell the rubber.