Flange Clamp

Install your foundations efficiently and safely with our Flange Clamp Tool. Flange Clamp Tools are used to temporarily secure the axial connection between the flanges of tower and substructure of a wind turbine generator prior and during the installation of permanent bolting. After installing the majority (or all) of the installation bolts, all Flange Clamp Tools are removed.

Once the Flange Clamp Tool is added to the structures, there is no need for personnel in the wind turbine during the installation procedure. This increases safety during offshore operations. In addition, this temporary connection also reduces the installation time (no vessel needed during bolting), which increases the efficiency.

The Flange Clamp Tool is multifunctional and is mostly used at offshore floating wind projects, but can also be used in other on- and offshore projects.


A Flange Clamp Tool system consists of a predetermined number of preinstalled Flange Clamp Tools, preferably equally divided over the circumference of the tower flange. Each system is connected to a Termination Panel that is remotely operated.

Once the Flange Clamp Tool are installed, the tower can be placed on the substructure and the temporary connection can be made with the Flange Clamp Tools. After the temporary connection, the bolts can be placed by personnel safely and the Flange Clamp Tools can be removed once all the bolts are fixed and tensioned.

The Flange Clamp Tool consist of two separate double acting cylinders who extend and clamp the flanges to make a fail safe connection.


  • Capacities up to 60t
  • Fail safe principle
  • Complete system includes: Termination Panels, HPU, Control Unit and Umbilical Reel
  • Available for purchase and rental


  • Increases safety and efficiency
  • Ensures a pre-tension to create a safe environment prior to, and during installation of the bolts
  • Remotely operated to ensure a safe work environment
  • Can be used for multiple solutions on- and offshore
  • Pre-tension can be up to 600kN for each tool used


Let’s build together and make that temporary connection that is needed for your project. Are you interested in our Flange Clamp Tools? Do not hesitate to contact us. We are more than happy to help you.

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