METHOD FOR JOINING MULTI-LAYERED PIPE

摘要

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) .