All dimensions, weight and performances are for reference only and are subject to change without advice.
Each equipment can be custom made according customer specifications.

This machine has been designed and developed to help the laying of pipes in the sea. The main function of this machine is to apply to the pipes a maximum tension load of 175 tons at a maximum laying speed of 40 m/min.

The machine can be horizontally or vertically installed. It means that the laying line of the machine can be horizontal or vertical. When the tensioner is installed so that it can vertically lay (on a firing tower), the position of the laying line depends on the tower inclination.

The machine consists of a welded steel structure on which other subassemblies are installed.

Two track subassemblies (lower and upper ones) are installed on four screwed jacks that are part of the structure and that are used to move the tracks up and down and position them on the pipe; the necessary clamping load on the pipe is obtained through a pneumatic clamping device installed into both the tracks.

Each track is operated by two direct current motors through two gearboxes; the electric motors are equipped with auxiliary coolers. All the driving items are installed on the track frames. The operating speed of the motors, and so the laying speed of the process, can be controlled by two speedometer dynamos connected to the motors. The length of the laid pipe can be measured by two encoders installed on the motors.

The upward and downward movement of each track on the screwjacks is obtained though two electric motors and gearbox that are installed on the track frames.

Plates with screwed saddles have been installed on the tracks, supporting fixed rubber pads that equally distribute the contact pressure on the pipe surface to ensure a good friction coefficient.

The saddles can be replaced to fit the processed pipe diameter; the contact radius of the rubber pads must fit the pipe diameter in order to avoid a stress concentration that could damage the pipe envelope and in order to ensure the tension capability of the machine.

The tracks are supported by suspensions formed by a group of rollers that are installed on double supports screwed on the track structure.

Two load-cells are installed in the rear part of each tracks (motorization end). The traction load of the tensioner is strictly controlled during the operation.

The clamping operation is performed by clamping the pipe within the two tracks and then exert a uniform pressure all over the pipe. The pipe can then be moved onward or backward by the track motors to lay or recover at the desired tension. The machine operation is electronically controlled and managed; this guarantees the safety of the operations.