Diverless J-tube or I-tube seals are fitted to the host umbilical or flowline on the installation vessel. Njord J-tube S (Seals) are used to prevent the loss of the corrosion inhibitor solution used in the annulus between the host line and the J-tube bore.

Njord J-Tube S is secured to the host line by integral clamps. It can then be pulled into the J-tube or I-tube with the host line. Typically Njord J-Tube S will be installed in the J-tube just behind the entry bellmouth.  The interference fit provides the seal – no subsea activation procedure or intervention is necessary.