Compressor Stations

Performs well under pressure. Compressor stations along the pipelines keep the gas moving.

Natural gas is pushed along our pipelines at a pressure of about 70 bar. The average flow velocity is 8 m/sec or about 28 kpm. Due to friction and changes in elevation, the gas steadily loses pressure and thus speed. Because of this, compressor stations are located at intervals of 70–200 km to maintain a constant flow. 

25,000 kilowatt for 84 bar

A turbine drives a compressor, which returns the gas to approx. 70 bar. The turbine, similar to an aero engine, has an output of up to 25,000 kW. Since gas heats up when it is compressed it is cooled before being returned to the pipeline. This is because of the need to protect the plant life in the vicinity of the pipeline. 

Close to customers

Branch points transfer the gas from the main transit pipelines to the downstream distribution networks that carry it to consumers. The closer the line gets to the end user, the narrower it becomes, meaning that the pressure and flow rate also drop. The consumers include power and industrial plants, as well as private households. 

Learn how a compressor station works.