Composite pipe formed by a metallic outer pipe with inner lining of plastic material, method for manufacturing said pipe, and its use

Abstract From the Canadian patent

A method for manufacturing a composite pipe formed by an outer metallic pipe with a plastic material inner lining is described. The pipe exhibits resistance to, internal and external pressure and resistance to aggressive agents defined by the, plastic material. The inner lining is a prefabricated plastic material pipe inserted into, the metallic pipe, interposing a means able to transmit internal pressure within the, plastic material pipe to the metallic pipe. The method comprises the steps of: grasping, said prefabricated plastic material pipe by one end; and dragging it into the metallic, pipe; simultaneously injecting a setting filling material by means of an injection tool, into …