FUSION PIPE JOINING SYSTEM AND METHOD

摘要

In a plastic pipe joining system a plastic sleeve 6 is provided to extend on both sides beyond the region of contact or closest approach to one another of pipes (2 and 4) to be joined with the sleeve being fused to both pipes, the sleeve heated to Curie temperature of high mu material excited by an externally generated high frequency magnetic field. The heaters (16 and 18) may be embedded in the sleeve (6) and the sleeve may also be employed with end caps (12 and 14) that extended over the sleeve, the end caps and sleeve being fused to one another and the pipes by heaters carried by the end caps or the sleeve. An external heater may also be employed which in conjunction with shaped end members provides the sleeve with beveled or tapered edges to enhance the ability of the sleeve to withstand cracking.