These riser and J tube plugs are designed to be inserted and set
Variants can be made up for flanged and bellmouth risers and J-tubes.
The materials are resistant to seawater together with the biocides
and inhibitors used to protect the inside of the tubes.
The plugs are near neutrally buoyant in seawater minimising trim
changes on the ROV during installation.
High pullout forces can be resisted and the plugs are fitted with
relief valves to vent excess head pressure from within the J-tube.
These plugs are a practical solution to underwater engineering
requirements for long term temporary riser and J tube sealing requirements.
Alongside you can see one of the plugs undergoing a pull-out resistance
The plugs can be produced in diameters from 30mm to 1200mm.
Data Sheet (.pdf)