Method for repairing sewer pipes

Details Method for repairing sewer pipes Method for repairing sewer pipes

1976-02-05

1979-10-09

Aegerter, Richard E.

Pipes and tubular conduits

Repairing

F16L 5518

Patent

active

041702484

ABSTRACT:
A sewer pipe is repaired by inserting a thin, flexible liner within the sewer pipe. The liner has an outer diameter less than the inner diameter of the sewer pipe, whereby an annular space is presented between the liner and the sewer pipe. This annular space is filled with a low viscosity magnesium based cement, such as magnesium oxychloride cement or magnesium oxysulfate cement, which has a maximum Marsh funnel viscosity of 40 seconds per quart.

REFERENCES:
patent: 3163181 (1964-12-01), Xenis et al.
patent: 3211573 (1965-10-01), Hight et al.
patent: 3261374 (1966-07-01), Anderson et al.
patent: 3562056 (1971-02-01), Olson
patent: 3662045 (1972-05-01), Tierling
patent: 3773874 (1973-11-01), Long
patent: 3774403 (1973-11-01), Cushing
patent: 3816148 (1974-06-01), Barthel

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