Not all the imperfections of a pipeline require lining of an entire section. For (3) three lustrums EBD has been installing "Partliners" (a no dig rehab solution) to repair many imperfections. Cracks, Fractures, Holes, damaged joints, Root intrution, and ground water infiltration are efficiently repaired by use of a "Partliner" with minimum disruption.
EBD's "Partliner" utilizes epoxy / fiberglass liner materials for their unique properties. Epoxy / fiberglass allows the thickness to be reduced as compared to conventional polyester liners. Partlining with epoxy resin allows the fiberglass matte & resin to bond to the host pipe. (If properly cleaned) The "Partliners" can be installed in 6"-6' long segments in 5" to 24" Dia. and even larger Dia.'s if pipe access is made addiquite for packers. Multiple partliners can be overlapped to allow for longer length coverage. Because of it's high strength and bonding properties this is possible. Partliners can be installed most times w/o by-pass.
Unlike polyester resin products "Partliners" do not shrink. It is important for shorter liners to stay in place once installed into the pipe segment. The ends are tapered to allow for laminer flow of the liquid and/or seweline maintenence tools to glide over this internal point repair.