Method of connecting a branch-pipe to a main-pipe which has been renovated using a plastic relining pipe

摘要

The method for joining a connecting pipe (16) to a main pipe (18) fitted with a plastic relining sleeve (19) comprises locating the mid-point of the end of the connecting tube from inside the main pipe. An opening is then produced in this area by heating the lining from the inside and this is widened by continuing to heat and exerting pressure towards the connecting pipe. The relining material is then inserted into the connecting tube, smoothed out and fixed to it.