Pipe expansion and repair fitting

Claim 1

A pipe expansion and repair fitting for extending or repairing pipelines, said fitting comprising a bellows arrangement, said bellows arrangement including a central bellows section having first and second tubular ends for fitting around and connecting to ends of the pipeline being extended or repaired, flow tube means having first and second ends internally bridging the bellows section of said bellows arrangement to reduce turbulence of the bellows between the ends of the pipe, an internal recess at the second tubular end proximate to the bellows section of said bellows arrangement, a ridge at the first end of said flow tube means lockingly fitting into said recess and affixing said flow tube means into said bellows arrangement bridging said bellows section, the tubular ends of said bellows arrangement each having an external recess therein, a guard shell surrounding said bellows for protecting the bellows against the adverse effects of the surrounding environment, and beaded ridges at each end of said guard shell fitting into said external recess and locking said guard shell in place.