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  • Hywind Tampen

The world’s largest floating offshore wind farm built with our ropes

Hywind Tampen will soon be the world’s largest floating offshore wind farm. It is currently in construction, using 200 tonnes of specialty ropes produced in France by ArcelorMittal WireSolutions Bourg-en-Bresse.

Wind energy to reduce emissions

Hywind Tampen is a 88 MW floating wind project in the Norwegian North Sea, located approximately 140 km off the Norwegian coast consisting of 11 wind turbines supplying the electricity for two offshore platforms. It will be the world’s first floating wind farm to power offshore oil and gas platforms. The wind power solution will help reduce the use of gas turbine power, while also offsetting 200,000 tonnes of CO2 emissions and 1,000 tonnes of NOx emissions per year.

Our mooring wires secure the turbines

In April 2020, ArcelorMittal Bourg-en-Bresse was selected by Equinor and Aker Solutions to supply a complete package of bridle mooring wires for the fabrication of Equinor’s Hywind Tampen.

This year, ArcelorMittal Bourg-en-Bresse delivered 70 segments of sheathed spiral mooring wires fitted with forged sockets required for the project, representing approximately 200 tonnes of steel. The mooring wires have a diameter between 77 and 105 mm, a length of 85 metres, and will form part of the anchoring system that ensures the stability of the wind turbines.

Fruitful collaboration between ArcelorMittal’s business divisions

ArcelorMittal won the contract for the Hywind Tampen project thanks to a very good cooperation between ArcelorMittal WireSolutions Bourg-en-Bresse and ArcelorMittal Projects. Since 2020 ArcelorMittal Projects has been supporting Bourg-en-Bresse for the prospection of all the ropes projects. For this project, we took advantage of the already existing frame and cooperation agreement between AkerSolutions and ArcelorMittal Projects on other steel products (plates, beams and tubes). This gave us a great competitive advantage.

Congratulating the project team, Jean-Marc Liegeois, CEO of ArcelorMittal WireSolutions and Revigny said: “I would like to congratulate the teams working on this project, as it confirms ArcelorMittal Bourg-en-Bresse’s ability to produce specialty ropes in a short time. It also shows that we have the competencies, the required know-how, and the market position to become a major player in the growing industry of floating wind farms. Once completed in 2022, Hywind Tampen will be the world’s largest floating offshore wind farm and will produce the world’s first renewable power for the offshore oil and gas industry, reinforcing our low-carbon commitment.”


© 2021 Equinor ASA


Our ropes before shipment 


Mooring wires from Bourg-en-Bresse