J-tube supports and protects cables between the bottom of the sea and the top part of the offshore wind foundation, where they are connected to the substation or the offshore wind turbine. J-tubes provide the necessary protection of the cables and are an essential part of any offshore wind foundation structure. The product consists of steel tubes that are bent into the required J or S shape to make up the full length of a J-tube.

Our typical J-tube sizes are between 457mm and 610mm in diameter. These tubular are supplied in seamless or welded condition, depending on the customer’s and end user’s needs.

Pipes are bent according to project requirements. When bending radius allows, cold bending is applied as this is a reliable and the most cost-effective option. Pipes can also be induction bent.

After the completion of bending, pipes are cut to length at required tolerances, including end bevels or internal tapering. Depending on customer specifications, J-tubes are then shot blasted and primed. Together with the J-tubes, the support structure (J-tube supports or guides) is often supplied as a complete package.

We are able to offer either a bespoke design or make use of a vast array of existing designs of J-tubes to suit a wide range of pipes, umbilicals and cables. Get in touch and let me know about your requirements!

Found more our subsea cable accessories here.

Learn more about Cable Protection System here.