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Additional recommended knowledge
Oxygen tanks are used to store gas for:
Contrary to popular belief scuba divers very rarely carry oxygen tanks. The vast majority of divers breathe air or nitrox stored in a diving cylinder. A small minority breathe trimix, heliox or other exotic gases. Some of these may carry pure oxygen for accelerated decompression or as a component of a rebreather. Some shallow divers, particularly naval divers, use oxygen rebreathers or have done so historically.
As liquid oxygen at atmospheric pressure boils at -183°C / -297°F a liquid oxygen tank must store the oxygen below that temperature and be a good thermal insulator.
Oxygen is rarely held at pressures higher than 200 bar / 3000 psi due to the risks of fire triggered by high temperatures caused by adiabatic heating when the gas changes pressure when moving from one vessel to another.
All equipment coming into contact with high pressure oxygen must be "oxygen clean" and "oxygen compatible" to reduce the risk of fire. "Oxygen clean" means the removal of any substance that could act as a fuel or source of ignition. "Oxygen compatible" means that internal components must not burn readily or degrade easily in a high pressure oxygen environment.
In some countries there are legal and insurance requirements and restrictions on the use, storage and transport of pure oxygen. Oxygen tanks are normally stored in well ventilated locations, far from potential sources of fire and concentrations of people.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Oxygen_tank". A list of authors is available in Wikipedia.|