Cylindrical corrosion barrier for pipe connections

An apparatus for providing a continuous corrosive barrier at a welded connection of pipe having an internal corrosion resistant barrier therein, comprising:

• a heat and corrosion resistant monolithic sleeve member comprising inner and outer cylindrical surfaces, opposed ends received within the pipe adjacent the weld connection, and a circumferential recess disposed intermediate the opposed ends and aligned with the weld connection;
• a circumferential metal ring member disposed within the recess, the ring having an outer diameter slightly less than the inner diameter of the pipe and an inner diameter sufficiently less than the outer diameter of the recess so that the sleeve is secured relative to the ring;
• an insulative member disposed between the ring and the sleeve.

A continuous corrosion barrier for welded interconnections of pipe ends, comprising:

• a sleeve having cylindrical outer surface and a cylindrical inner surface and opposed first and second ends;
• a plurality of removable pins extending outwardly from said sleeve, adjacent the midpoint between said opposed first and second ends;
• wherein said sleeve further includes a recess formed therein adjacent said midpoint, and wherein said pins are received on a support member received in said recess.