Method for joining multi-layered pipe

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

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F16L 47/03 (2006.01) B29C 65/02 (2006.01)

Patent

CA 2598232

A method for joining a multi-layered pipe (37) to a coupling (35), the multi- layered pipe (37) including at least an outer (1) and an inner (5) layer of thermoplastic material and a core layer (3) of metal or other conductive material, the coupling (35) comprising a thermoplastic material, the method comprising; providing a coupling (35) including a recess (R) for receiving an end of a multi-layered pipe (37), the recess (R) being configured, in use, to permit the coupling (35) to contact the inner (5) and outermost (1) layers of a multi-layered pipe (37) received in the recess (R); fitting an end of the multi-layered pipe (37) into the recess (R) of the coupling (35); introducing heat to both the coupling (35) sufficient to cause local melting at the interface between the coupling (35) and either the inner layer (5) alone or both the inner (5) and outer (1) layers of the multi-layered pipe (37).

Procédé de raccordement d'un tuyau multicouche (37) à un accouplement (35), le tuyau multicouche (37) comprenant au moins une couche extérieure (1) et une couche intérieure (5) en matériau thermoplastique et une couche d'âme (3) en métal ou autre matériau conducteur, l'accouplement (35) comportant un matériau thermoplastique, le procédé consistant à : mettre à disposition un accouplement (35) comprenant un renfoncement (R) destiné à recevoir une extrémité d'un tuyau multicouche (37), le renfoncement (R) étant configuré, en utilisation, pour permettre à l'accouplement (35) de venir au contact des couches intérieure (5) et extérieure (1) extrêmes d'un tuyau multicouche (37) reçu dans le renfoncement (R) ; ajuster une extrémité du tuyau multicouche (37) dans le renfoncement (R) de l'accouplement (35) ; appliquer à la fois à l'accouplement (35) et au tuyau multicouche (37) une chaleur suffisante pour provoquer une fusion locale à l'interface entre l'accouplement (35) d'une part, la couche intérieure (5) seule ou à la fois les couches intérieure (5) et extérieure (1) du tuyau multicouche (37) d'autre part.

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