Patent ID: 7203419

Claim:
A conduit comprising: a pipe; an electrical heater extending along the length of the pipe; a thermally insulating jacket extending around the pipe and heater; wherein the pipe comprises a plastics inner tube, the plastics inner tube being received within a deformable metal tube such that the plastics inner tube and deformable metal tube form a composite double-walled structure; wherein the heater is in the form of a cable incorporating longitudinally extending wires between which a heating element is electrically connected, the cable being mounted on the pipe; and wherein the insulating jacket comprises first and second preformed layers mounted on the pipe, the first layer extending around the pipe from side surfaces of the cable and having a thickness substantially the same as the thickness of the cable measured from a lower surface of the cable in contact with the pipe, and the second layer extending over the first layer and an upper surface of the cable remote from the pipe.