Method and apparatus for coating pipes

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 58/18 (2006.01) B29C 63/06 (2006.01) F16L 13/02 (2006.01) F16L 58/10 (2006.01)

Patent

CA 2683811

Method and apparatus for coating a pipe (2) or a pipe section with a layer of at least one polymer. The method comprises providing a pipe (2) or a pipe section having an outer surface defining the periphery of the pipe or pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle (3), which is mounted on a carriage capable of travelling along the periphery of the pipe (2) or pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe (2) or pipe section. The present invention is particularly useful for coating field joints in pipelines.

L'invention concerne un procédé et un appareil pour revêtir un tuyau (2) ou une section de tuyau par une couche d'au moins un polymère. Le procédé comprend les opérations consistant à disposer un tuyau (2) ou une section de tuyau ayant une surface externe définissant la périphérie du tuyau ou de la section de tuyau; à appliquer sur la surface externe du tuyau ou de la section de tuyau une couche d'au moins un matériau polymère à l'état fondu à l'aide d'une buse (3), qui est montée sur un chariot capable de se déplacer le long de la périphérie du tuyau (2) ou de la section de tuyau; et à déplacer le chariot le long d'au moins une partie de la périphérie pendant l'application du matériau polymère pour former une couche sur la surface du tuyau (2) ou de la section de tuyau. La présente invention est en particulier utile pour revêtir des raccords dans des canalisations.

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