How to remove, change a gas cylinder or bottle to replace a blowtorch, stove, lamp

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How to remove, change a gas cylinder or bottle to replace a blowtorch, stove, lamp

A gas cylinder is a pressure vessel for storage and containment of gases at above atmospheric pressure. Gas storage cylinders may also be called bottles. Inside the cylinder the stored contents may be in a state of compressed gas, vapor over liquid, supercritical fluid, or dissolved in a substrate material, depending on the physical characteristics of the contents. A typical gas cylinder design is elongated, standing upright on a flattened or dished bottom end or foot ring, with the cylinder valve screwed into the internal neck thread at the top for connecting to the filling or receiving apparatus.[1]

Nomenclature
Gas cylinders may be grouped by several characteristics, such as construction method, material, pressure group, class of contents, transportability, and re-usability.[2]

The size of a pressurised gas container that may be classed as a gas cylinder is typically 0.5 litres to 150 litres. Smaller containers may be termed gas cartridges, and larger may be termed gas tubes, tanks, or other specific type of pressure vessel. A gas cylinder is used to store gas or liquefied gas at pressures above normal atmospheric pressure.[2] In South Africa, a gas storage cylinder implies a refillable transportable container with a water capacity volume of up to 150 litres. Refillable transportable cylindrical containers from 150 to 3,000 litres water capacity are referred to as tubes.[1]

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 term propane tank is also used for cylinders for propane.[citation needed]

The United Kingdom and other parts of Europe more commonly refer to “bottled gas” when discussing any usage, whether industrial, medical, or liquefied petroleum. In contrast, what is called liquefied petroleum gas in the United States 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.[citation needed]

The term cylinder in this context is sometimes confused with tank, the latter being an open-top or vented container that stores liquids under gravity, though the term scuba tank is commonly used to refer to a compressed gas cylinder used for breathing gas supply to an underwater breathing apparatus.

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