What are the different types of oxygen available?
There are three kinds of oxygen that are merchandised or sold to users; Aviator Breathing, USP Medical, and Welding. All three types must be 99.5% pure. Oxygen gas is produced from the boiling off of liquid oxygen. It would appear that the oxygen is therefore the same. Where we obtain oxygen, all the different types of oxygen are supplied from the same manifold system. It has been said that USP oxygen has moisture in it. That is not true. The oxygen going to a hospital bed is pure oxygen that comes from liquid oxygen. At the bed location, there may be a humidifier that adds moisture. The cost of USP or welding oxygen is normally much less than the oxygen you get at an airport. The bottom line about the different types of oxygen is in the insurance liability of the oxygen supplier. The gas is the same but the insurance liability is different. The welding Gas Company mayor may not supply you with oxygen for your aircraft. Likewise the medical oxygen supplier mayor may not supply you with
