Internal electrofusion ring coupler

摘要

An internal ring coupler for fusing and sealing abutted ends of two pipes is provided. The ring coupler formed by a plastic ring having a substantially flat outer surface with at least two bands of thermoplastic welding rod encircling the outer surface of the plastic ring is provided. The coupling is placed on the inner circumference of two abutted plastic pipe ends. An electrical current is applied to the bands fusing the ring coupler to the interior of the ends of the two pipes to fuse the welding rod between the pipes and the coupler forming a seal over the pipe join.