National Grid awards Humber pipeline contract

National Grid has awarded the contract to design and replace the high pressure pipeline running under the River Humber to Skanska, PORR Bau GmbH and A.Hak.

National Grid awards Humber pipeline contract

National Grid said it has chosen the three companies for the three-year project costing £150 million because it needs “partners with experience and a proven track record.”

The pipeline will be 3.36 miles long, with a 5km tunnel built underneath the river. A single string of 42 inch steel pipe will be inserted to connect into the above ground installations at Paull and Goxhill, transporting natural gas at a pressure of 70barg.

When completed, the pipeline will be the longest gas pipeline in a tunnel, inserted in a single string, in the world.

National Grid’s senior project manager Phil Croft said: “Skanska, PORR and A.Hak were able to demonstrate their expertise and knowledge throughout the tender process, giving us the confidence that this was the right company to build this tunnel and pipeline in such an environmentally sensitive and commercially busy river.”

The contract is subject to planning consent, which National Grid expects the Planning Inspectorate to award in September 2016.

Skanska operations director Colin Nicol said: “The joint venture was formed to bring together international expertise to deliver, in an innovative, sustainable and collaborative way, a tunnel that will protect the pipeline for the long term, helping National Grid to provide a vital service to millions of people.”

The River Humber pipeline is part of the national transmission system connecting the import terminal at Easington on the East Yorkshire coast to the wider network.

In 2010 an innovative short-term engineering solution was put in place to stop erosion from tidal patterns exposing the pipeline, but due to the importance of the pipeline, a full replacement is now required.


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