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Natural gas

Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, with up to 20 % of other hydrocarbons as well as impurities in varying amounts such as carbon dioxide. Natural gas is widely used as an important energy source in many applications including heating buildings, generating electricity, providing heat and power to industry, as fuel for vehicles and as a chemical feedstock in the manufacture of products such as plastics and other commercially important organic chemicals.

Contributors in Natural gas

Natural gas

Pneumatic test

Energy; Natural gas

A test in which a valve is tested with air - usually a seat closure test.

Porosity

Energy; Natural gas

A defect found in castings or welds consisting of gas bubbles or voids in the solidified metal.

Position indicator

Energy; Natural gas

Any external device which visually indicates the open and closed position of valve.

Positive position

Energy; Natural gas

The installation position of a multi-port valve such that the valve's flow control element is between the pressure inlet body openings and the body openings that are closed off, thereby assisting in ...

Pressure relief valve

Energy; Natural gas

A valve that automatically opens at a set fluid pressure, allows fluid to discharge, and automatically reclosed when the fluid pressure drops below the set pressure.

Pressure seal joint

Energy; Natural gas

A design of body-bonnet joint that uses the fluid pressure ot compress a specially designed seal ring to form a tight seal and prevent external leakage.

Pressure-temperature ratings

Energy; Natural gas

The maximum allowable working pressures at specified temperatures. For steel valves, the ratings are defined by "classes" and found in ASME B16.34. For iron and bronze valves, the ratings are defined ...

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