Patent ID: 7264279

Claim:
A conduit, comprising: a) a first conduit segment comprising: i) a first body having a first interior surface and a first joint face; and ii) a first layer of a first lining material secured to said first interior surface and to said first joint face; b) a second conduit segment comprising: i) a second body having a second interior surface and a second joint face facing said first joint face and spaced therefrom by a distance so as to form an interfacial space substantially coextensive with at least one of said first and second joint faces; and ii) a second layer of a second lining material secured to said second interior surface and to said second joint face; wherein said first lining material and said second lining material each extend into said interfacial space; and c) a fusion having at least a portion formed from said first lining material secured to said first joint face and from said second lining material secured to said second joint face so as to form a fused interfacial mass consisting of all of said first lining material located in said interfacial space and all of said second lining material located in said interfacial space, said fused interfacial mass having a solid thickness between said first and second joint faces, said solid thickness consisting only of said first lining material and said second lining material throughout said fused interfacial mass, said fused interfacial mass being monolithic with each of said first layer and said second layer.