J-Tube bung
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AIS is a global leader in the engineering, manufacture and application of insulation and passive fire protection systems, as well as buoyancy and SURF (subsea, umbilicals, risers and flowlines) products.
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J-Tube bung

Sealing system for J-tube annulus protection

J-tube bungs prevent loss of corrosion inhibitor within the annulus between host line and J-tube bore, using a diver-installed polyurethane seal to maintain protection during offshore installation and operation.

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Benefits

Reliable sealing for J-tube annulus systems

J-tube bungs create an interference fit seal between the host line and J-tube bore, preventing loss of corrosion inhibitor. Installed by divers, they allow smooth pull-in operations without added resistance while maintaining annulus integrity throughout service life.

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Simple installation
Designed for straightforward diver installation, allowing efficient deployment in subsea environments without complex tooling or procedures while maintaining effective sealing performance within the J-tube annulus.
Corrosion retention
Prevents loss of corrosion inhibitor solution within the J-Tube annulus, maintaining long-term protection of the host line and surrounding internal environment.
Interference fit
Polyurethane sealing elements provide an interference fit between host line and J-tube bore, ensuring effective sealing without adding resistance during pull-in operations.

Specifications

Applications

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