Cryogenic Vessels have been commonly used for more than 40 years for the storage and transportation of industrial and medical gases. The advantage of storing gases in such a form is obvious : in a volume of 1 litre of liquid, about 800 litres of gas can be stored. This represents a clear advantage over the transportation of such gases in compressed form, which is done today at pressures of 200-300 bar (less gas per volume unit) and requires thick wall (and heavy vessels) to resist the high pressure.
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