Cathodic protection device for flexible pipes

C - Chemistry – Metallurgy – 23 – F

Patent

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C23F 13/02 (2006.01) F16L 58/00 (2006.01)

Patent

CA 2382078

The flexible pipe comprises a plastic sealing sheath and an inner plastic sheath which define an annular space in which structural elements are placed. The structural elements comprise at least one armor ply consisting of metal wires wound helically with a long pitch. An end fitting is provided at each end of the flexible pipe. At least one external anode is electronically connected to the at least one armor ply. The anode is placed in an intermediate region of the flexible pipe distal from the end fittings. The anode is connected to at least one of the metal wires of the armor ply or plies in the intermediate region.

La conduite flexible comprend une gaine plastique d'étanchéité et une gaine plastique interne qui délimitent un espace annulaire dans lequel sont disposés des éléments structurels comportant au moins une nappe d'armures constituée de fils métalliques enroulés hélicoïdalement à pas long, un embout de connexion (12, 13) étant monté à chaque extrémité de ladite conduite flexible (1), le dispositif (14) comprenant au moins une anode externe électriquement reliée par des moyens de liaison à ladite nappe d'armures, et il est caractérisé en ce que l'anode est disposée dans une zone intermédiaire (40) de la conduite flexible (1) distale desdits embouts, les moyens de liaison reliant l'anode à au moins un des fils métalliques dans ladite zone intermédiaire. Applications notamment aux conduites flexibles de grande longueur et reposant sur le fond marin.

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