Mechanical and coil fusion combination seal

摘要

A combination mechanical and fusion seal for use with a pipe includes a thermoplastic sleeve, wherein the thermoplastic sleeve includes a first portion constructed of a first material and a second portion constructed of a second material, wherein the first material has a lesser density and/or durometer than the density and/or durometer of the second material; an electrical resistive wire embedded within the second material; and at least one exposed lead attached to the resistive wire. A piping system utilizing the combination mechanical and fusion seal is disclosed. The present invention is also drawn to a method of joining the seal of the pipe to another pipe is also described.