ENTSOG South-North Corridor GRIP 2017 - Main Report

6.3.2 IN SWITZERLAND: REVERSE FLOW TRANSITGAS SWITZERLAND

The Transitgas pipeline in Switzerland is currently dedicated to transport gas from Germany and France towards Italy and at the same time to satisfy the Swiss gas market needs. In order to implement the physical reverse flow, Transitgas has obtained the necessary permits to make the required modifications to its transmission system and is ready to start construction. The Transitgas reverse flow project from Griespass to Wallbach and Oltingue envisages the modifications and expansion of the following system facilities in order to allow physical reverse flow: \\ Ruswil compressor station: works will allow flows to be reversed and to compress gas from south to north. Additionally, as the new deodorisation plant in Germany will always allow to compress gas from France to Germany and vice versa, additional regulation capability and flow measurement will be installed in Ruswil. \\ Lostorf interconnection station: works includes the exchange of regulation valves in order to be able to control gas flows in both directions. \\ Wallbach metering station: works includes the installation of bi-directional US (Ultra-Sound) gas flow meters as well as the automation of several valves. Additionally, gas quality measurements will also be installed. \\ Brislach station: installation of gas quality measurement (THT and sulfur) as a pre-warning for the odorisation plant built by GRTgaz in Oltingue for reverse flow. \\ Däniken valve station: installation of gas quality measurement (THT and sulfur). \\ Obergesteln valve station: works include the installation of a Pressure Control Valve in the bypasses of the existing valve station (foreseen in 2018). Permits have already been received. Engineering, design phases and tender for EPC have been completed in 2016. The preparation of the works started early 2017 and the works have been initiated end of March 2017 in the Wallbach, Ruswil and Lostorf stations. Commissioning is planned for October 2017.

Image courtesy of FluxSwiss

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South-North Corridor GRIP 2017