As part of the Nordseecluster offshore wind project, Chantiers de l’Atlantique called on Pronal to ensure the success of the offshore installation of the jacket. Through the supply and installation of its Grout seals, Pronal guarantees the stability and reliability of the structure under the demanding conditions of the North Sea.

A Pronal solution at the heart of a major offshore project.

The Nordseecluster project, located in the North Sea, aims to connect several offshore wind farms to the onshore power grid in order to produce sustainable, decarbonized energy. For this mission, Chantiers de l’Atlantique, experts in shipbuilding and offshore construction based in Saint-Nazaire, designed and assembled the electrical substation.

Subjected to significant mechanical, hydrodynamic, and corrosive stresses, the structure must ensure perfect sealing between the foundation piles and the platform. This technical challenge was successfully met thanks to Pronal’s expertise in designing tailor-made sealing solutions.

Grout seals ensure the stability of jacket installation

Pronal Grout seals are passive seals designed to create a watertight seal between the jacket’s steel structure and the piles.
For this platform, eight grout seals were supplied, two per leg on each of the jacket’s four legs. Made from high-strength elastomer and vulcanized, they are designed to withstand concrete pressure during the grouting process, securing the installation and maintaining optimal performance throughout installation.

These components play an essential role in ensuring :

  • Complete sealing between the foundation pile and the structure,

  • Resistance to seawater,

  • Optimal safety for the entire jacket.

Comprehensive technical support on site

Pronal’s involvement was not limited to the manufacturing and supply of the Grout seals.
Factory tests demonstrated the performance and reliability of the products.

In early July, technical teams traveled to the construction site to supervise the installation and ensure the quality of integration prior to the jacket’s departure.

The structures left Chantiers de l’Atlantique in August to reach their final site in Germany, marking the start of the offshore installation phase.

Nordseecluster chantier de l'atlantique, Grouts seals Pronal

A collaboration focused on innovation and performance

This partnership with Chantiers de l’Atlantique illustrates Pronal’s ability to deliver technical solutions tailored to the specific needs of the offshore industry.
Thanks to its expertise in flexible sealing and offshore solutions, Pronal directly contributes to the success of the Nordseecluster project and to the development of offshore renewable energy.

Grout seals Pronal installation Chantier de l'Atlantique

Pronal tailor-made solutions at the heart of offshore projects

Pronal designs and develops tailor-made solutions adapted to the specific constraints of each offshore project, with solutions capable of reaching up to 3 meters in diameter and withstanding pressures exceeding 3 bar.
In addition, Pronal teams provide supervision and installation support, both onshore and offshore, to ensure performance, reliability, and safety in the field.

Would you like more information on this project?

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