Pipe lining method

Details Pipe lining method Pipe lining method

1999-10-21

2000-07-11

Hook, James

Pipes and tubular conduits

Repairing

Patches

138 97, 156287, 264 3617, F16L 55162

Patent

active

060857943

ABSTRACT:
A pipe lining method is provided for simply positioning a flange of a branch pipe liner bag to a branch pipe opening of a main pipe in a short period of time, and preventing the branch pipe liner bag from having a locally insufficient strength. A branch pipe liner bag is everted and inserted into a branch pipe with a fluid pressure. With the branch pipe liner bag pressed onto the inner wall of the branch pipe, a hardenable resin impregnated in the branch pipe liner bag is hardened to line the branch pipe. Then, a main pipe liner bag is everted and inserted into a main pipe with a fluid pressure. With the main pipe liner bag pressed onto the inner wall of the main pipe, a hardenable resin impregnated in the main pipe liner bag is hardened to line the main pipe. The fluid pressure acting inside the main pipe liner bag is adjusted such that a portion of the hardenable resin impregnated in the main pipe liner bag is oozed out. The oozed hardenable resin is introduced into a clearance space, and hardened therein.

REFERENCES:
patent: 5329063 (1994-07-01), Endoh
patent: 5454401 (1995-10-01), Kamiyama et al.
patent: 5498389 (1996-03-01), Kamiyama et al.
patent: 5916406 (1999-06-01), Kamiyama et al.
patent: 5971031 (1999-10-01), Kamiyama et al.
patent: 6006787 (1999-12-01), Kamiyama et al.

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