GAS BAR - uk gas production5 Jul 2022 19:21
The Milford Haven pipeline will operate between 70 – 94 bar. The National Gas Transmission System (NTS) currently operates pipelines at up to 85 bar in other parts of Great Britain. The NTS is made up of some 6,800 km of high pressure gas pipelines. Work on this system began in 1966 following the discovery of natural gas in the southern North Sea. The early network was largely constructed from 36ins diameter pipe running at 70 bar.
In the 1970s major gas finds were discovered in the northern North Sea. This led to the construction of an onshore gas terminal at St. Fergus, north of Aberdeen, and two pipeline feeders to take gas south. As gas input from the north increased extra feeders were built: another 36ins pipeline, followed by a 42ins pipeline. In 1999 the existing lines and these new lines were uprated to 85 bar. Finally, a 48ins feeder was added running as far south as Montrose. This is designed for 94 bar operation but currently runs at 85 bar due to supply constraints.
There are other onshore British pipelines which transport flammable substances at pressures higher than 94 bar.
Pipelines associated with gas terminals operate at up to 148 bar.
In Scotland and northern England the 1,200km ethylene pipeline network operates at 95 -100 bar. And offshore pipelines may operate at much higher pressures – some at over 300 bar.