Abstract: A flexible pipe suitable for transporting fresh water is described. The pipe has a circular cross-section when it is pressurized and which can collapse in on itself. The pipe has an outer diameter of between 1 and 7 meters and a length of between 200 and 3000 meters and includes an envelope which is sealed from the transported liquid, and at least two peripheral reinforcing elements increasing the mechanical resistance of the pipe to a positive differential pressure so that the pipe can support a positive differential pressure of between 1 and at least 10×105 Pa without bursting or cracking.

Abstract: The invention relates to the implementation of a fluid transportation pipe. In order to achieve this, the pipe is equipped with a ballasting system, and, along a laying axis, the pipe, thus equipped, is immersed in a fluid having movement, such as the sea. A ballast mass of the ballasting system then substantially causes at least this ballasting system to sink.

Abstract: A flexible pipe suitable for transporting fresh water is described. The pipe has a circular cross-section when it is pressurised and which can collapse in on itself. The pipe has an outer diameter of between 1 and 7 meters and a length of between 200 and 3000 meters and includes an envelope which is sealed from the transported liquid, and at least two peripheral reinforcing elements increasing the mechanical resistance of the pipe to a positive differential pressure so that the pipe can support a positive differential pressure of between 1 and at least 10×105 Pa without bursting or cracking.

Abstract: The invention relates to an assembly that includes a pipe for transporting liquid, deformable between an internal circular cross-section and a flattened internal cross-section that can be null and that can be folded on itself longitudinally, and a device for installing the pipe. The device includes a rotating turret about which the pipe is wound and flattened, presentation means for presenting one opposite the other in a commonly conformed state, two pipe sections, assembly means for a water-tight link between said sections, optional tensioning means for transmitting an axial tension to the elongated pipe, and means for attaching ballast to the elongated pipe.

Abstract: The invention relates to the implementation of a fluid transportation pipe. In order to achieve this, the pipe is equipped with a ballasting system, and, along a laying axis, the pipe, thus equipped, is immersed in a fluid having movement, such as the sea. A ballast mass of the ballasting system then substantially causes at least this ballasting system to sink.

Abstract: The invention relates to an assembly that includes a pipe for transporting liquid, deformable between an internal circular cross-section and a flattened internal cross-section that can be null and that can be folded on itself longitudinally, and a device for installing the pipe. The device includes a rotating turret about which the pipe is wound and flattened, presentation means for presenting one opposite the other in a commonly conformed state, two pipe sections, assembly means for a water-tight link between said sections, optional tensioning means for transmitting an axial tension to the elongated pipe, and means for attaching ballast to the elongated pipe.