19 Terms
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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.
Industry: Energy
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Natural gas
Flow control element
Energy; Natural gas
The part of a valve that obstructs and controls fluid flow; it determines the valve type and the nature of fluid control for which the valve is suited.
Blowdown
Energy; Natural gas
The difference between the set (opening) pressure and the disc reseating pressure of a pressure relief valve, which is usually expressed as a percentage of the set pressure.
Body
Energy; Natural gas
The part of a valve that houses the flow control element, contains seating surface, retains fluid pressure, and in most valve designs, has ends for attaching to connecting pipe.
Bubble tight
Energy; Natural gas
A phrase used to describe the tightness of valve seating surfaces. It derives from a seat tightness test in which compressed air is used for the test. with water on the downstream side of the seat so ...
Bolted bonnet
Energy; Natural gas
A body-bonnet joint design in which the bonnet is fastened to the body using studs or bolts and nuts; it uses a gasket to provide joint sealing.
Butt weld end
Energy; Natural gas
A valve end machined to the proper dimensions to enable butt welding to connecting pipe.
