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    Review of Design and Experience with Thermoplastic Outfall Piping

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    Flexible pipes of thermoplastics such as polyethylene and polypropylene are excellently suited for the construction of submarine outfall systems because they can be extruded in long sections, towed fully equipped with anchoring weights to the outfall site from the production base, and sunk directly on to a seabed with a minimum of underwater work. When lying on the seabed they can yield to extreme wave and current forces and conform to the seabed when underscoured without failure. This factor allows a light structure, a short implementation time and a cost-effective outfall system.


    ocean outfall, submarine pipeline, flexible piping, polyethylene pipe

    Author Information:

    Janson, Lars-Eric
    Head of Research and Development, Dr Sc. M. ASCE. VBB Consulting Ltd, STOCKHOLM,

    Committee/Subcommittee: D20.15

    DOI: 10.1520/STP42130S