A gas cylinder is a pressure vessel for the storage and containment of gases at above atmospheric pressure. High-pressure gas cylinders are also called bottles. Cylinders containing compressed, liquefied or dissolved gases can create a dangerous situation in the event of a fire. This is because they may explode as a result of the heat generated. In principle, empty cylinders should be treated in the same way as full cylinders.
The three main types of compressed gases that are stored in gas cylinders which include: