Nomenclature differences

A gas cylinder or tank is a pressure vessel used to store gases at above atmospheric pressure. 
High-pressure gas cylinders are also called bottles, but a bottled gas may instead be in a liquid or dissolved state in the cylinder.
In the United States,bottled gas typically refers to liquefied petroleum gas. 
Bottled gas is sometimes used in medical supply, especially for portable oxygen tanks. 
Packaged industrial gases are frequently called cylinder gas,though bottled gas is sometimes used.
The United Kingdom and other parts of Europe more commonly refer to bottled gas when discussing any usage whether industrial,medical or liquefied petroleum. 
However,in contrast,what the United States calls liquefied petroleum gas is known generically in the United Kingdom as LPG;and it may be ordered by using one of several trade names, or specifically as butane or propane depending on the required heat output.


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