This system has been initially developed by TECHLAM for the connection of a Flexible Joint through a Receptacle. Three main parts compose this system:
The I-tube which is welded on a Receptacle, linked to a FPSO or a Buoy for instance,
The Connector which is a part of the Flexible Joint,
And, the Hydraulic Jacks which maintain the Connector inside the I-tube.
The Jacks act as a bolt tensioning tool with a locking mechanism. Indeed they apply a pre-tension on the Connector thanks to a hydraulic pump (manual or electrical) and then, they are mechanically locked in position to maintain the pre-tension and the Connector in-place inside the Receptacle.
Example of connection sequence of an Export Line to a FPSO
- The Export Line is connected to the Pull In Line by the means of the Pulling Head. The pull in can start.
- The Flexible Joint is guided into the Receptacle.
- It gets in contact on the support face located in the Receptacle
- The four Jacks, part of the tensioning system, are tilted in order to get in contact on the Prestressring.
- The pressure of the four Jacks is then increased to produce the required pre-tension in the fitting, and locked in position.
- The Pulling Head is removed.
- The FPSO spool is finally connected to the Flexible Joint end flange.