Njord J-Tube B (Bungs)

Njord J-Tube B (Bung)

Njord J-Tube B are used to prevent the loss of corrosion inhibitor solution used in the annulus between the hostline and the J-Tube bore.

Modular design

The seal is secured to the host line by an integral clamp. It can then be pulled into the J-Tube or I-Tube with the host line. Typically the seal will be installed in the J-Tube just behind the entry bellmouth.  It is installed by diver.

Interference fit

Polyurathane seal elements are used to provide an interference fit to hold the host line and the J-Tube bore. The interference fit provides the seal by diver activation.  This means there is no resistance during the flexible or umbilical pull in operation.

Corrosion inhibitor retention

J-Tube seals are primarily used to prevent the loss of corrosion inhibitor within the J-Tube annulus.

Key Applications


Centralizing action


product sheet
J-Tube Bung, Trelleborg Offshore

Njord J-Tube B (Bung)


View J-Tube B

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Other Trelleborg Offshore products in the Cable & Flowline Protection