Natural gas, formed deep within the earths crust between the Tertiary and Permiangeological periods and contained in reservoirs under the seas and land masses in many parts of the world, is the cleanest and least environmentally damaging of our fossil fuels.It is a major indigenous fuel source for many industrialised and developing countriesthat will be available for generations to come.The importance of providing clean dry gas for powering both industry and commerceas well providing domestic energy cannot be underestimated. > filtration group The infrastructure of the natural gas transmission...

Natural gas obtained from the offshore fields contains particulate and liquids such as water and condensates that need tobe reduced before the gas can enter the NTS. On the platform initial separation in the form of gross water removal in slug catchers and the first stage liquid/gas separation is performed typically at pressures above 100 bar. Glycol washers dry the gas further.Once the gas is received onshore at the beach terminal it can be necessary to employ further slug catchers dependingupon the gas/liquid characteristics of the stream. Main separators remove the main particulate and liquid...

The gas, now introduced into the NTS, must achieve a minimum cleanliness standard. This is necessary to preventdamage to any one of the 24 compressor stations strategically positioned around the country that enable the movement of gas anywhere in the system. Such facilities will usually be protected with a combination of particulate and liquid removal systems. The gas may be further cleaned after the compressor depending upon system requirements. The gas is now being moved about the NTS at a pressure up to 75 bar and a speed of approx. 12 m/s. The gas may also be placed into storage in either...

The gas pressure is reduced further to suit the lower pressure local transmission system via over 140 local distributionoff-take stations.At this stage the countries gas-fired power stations are supplied along with a number of large industrial consumers and the gas is made ready for the local distribution system. Filtration plays a vital role in maintaining particulate free gas to the specification required to protect the pressure reduction stations (PRSs). > The process now utilises generally higher efficiency solid particulate removal to ensure protection of the metering plants and downstream...

The gas is reduced in pressure at PRSs where an inlet pressure up to 38 bar from the LTS is reduced to below 7 bar. Thegas is now supplied to LDSs and ultimately to the consumer. To permit the necessary pressure supply to the consumer to be safely provided, of the order of only a few millibar, governors are used all over the countrywide system. These are essentially a self-controlling valve package with built-in standby systems and pressure relief systems. Such equipment requires the use of filters to prevent particulate from entering them and therefore filtration is performed at the higher pressure/velocity...

MF&T, 22 Dawkins Road Ind Est, Poole, Dorset BH15 4JYUK > Porvair Filtration Group Ltd., Fareham Industrial Park, Fareham, Hampshire PO16 8XG UKMicrofiltrex, Fareham Industrial Park, Fareham, Hampshire PO16 8XG UK Porvair Technology, Clywedog Road South, Wrexham Ind Est, Wrexham LL13 9XS UK Filters for Industry, Queensway, Stem Lane, New Milton, Hampshire BH25 5NN UK Porvair Filtration Group Inc., 454 South Anderson Road, BTC514, Rock Hill, SC 29730 USAMicrofiltrex, 454 South Anderson Road, BTC514, Rock Hill, SC 29730 USA Porvair Technology, 454 South Anderson Road, BTC514, Rock Hill, SC 29730...