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South-North Corridor GRIP 2017
Image courtesy of FluxSwiss
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:
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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.
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Lostorf interconnection station: works includes the exchange of regulation
valves in order to be able to control gas flows in both directions.
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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.
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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.
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Däniken valve station: installation of gas quality measurement (THT and sulfur).
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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.