Download: Construction and installation of a pipeline underwater

Construction of an underwater gas pipeline by Medgaz (Algeria Spain Europe gas pipeline)

The submarine pipeline will be built using a Lay Barge. This involves using a boat or mobile platform in which the tubes will be welded before being laid on the seabed.

There are two methods for this type of installation: "S-shaped" and "J-shaped". The former can be applied in both shallow areas and in very deep areas (up to 2.500 meters). This involves welding and laying the tubes in a horizontal position, so that the pipeline will adopt an "S" shape at the exit of the boat to the point where it rests on the seabed.

The "J-laying" involves welding the tubes in a vertical position. It is only used for depths between 400 and 3.500 meters, depending on the diameter of the tube. As the platform moves forward, the pipeline plunges under the sea vertically in a "J" shape, from the launching point to the bottom.

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MEDGAZ will be able to use the two systems for the construction of the pipeline in very deep waters. Next we describe the pose in J ...

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