The National Transmission System is the high pressure part of National Grid’s transmission system and it consists of more than 6,600 Kilometers of top quality welded steel pipeline operating at pressures of up to 85 bar. The gas is pushed through the system using 26 strategically placed compressor stations. From over 140 off-take points, the NTS supplies gas to 40 power stations, a small number of large industrial consumers and the twelve Local Distribution Zones (LDZs) that contain pipes operating at lower pressure which eventually supply the consumer.