LINING METHOD OF INNER FACE OF EXISTING PIPING

Japanese Patent JP3850423

B2

PROBLEM TO BE SOLVED: To provide a lining method of an inner face of existing piping capable of preventing deterioration of workability caused by increased tube thickness for enhancing pressure resistance, and also preventing deterioration of pressure resistance caused by decreased tube thickness, which are common problems of conventional lining methods for repairing existing piping from inner faces by using lining tubes as coating materials inside pipes.
SOLUTION: A cylindrical net 2 and an uncured lining material 3 are used as a lining material of the inner face of the existing piping 1. The cylindrical net 2 is inserted from an opening of one end of the piping 1, and the uncured lining material 3 is poured inside the opening of one end of the cylindrical net 2 inserted in the piping 1. The lining tube 42 is inserted from the opening of one end of the cylindrical net 2 so that the uncured lining material 3 is pressed forward so as to fill into meshes of the cylindrical net 2 on the entire circumferential area. The pressure inside the lining tube 42 is maintained until the uncured lining material 3 is hardened. After the lining material 3 is hardened, the lining tube 42 is drawn out from the piping 1 so that a cured lining layer B with the cylindrical net is formed on an inner circumferential face of the piping 1.

Eiji Nishihata
Shigeki Matsuoka
Shigenori Ito
Tsuneo Watanabe
Sumitomo Shoto
Yoshihiko Shigeoka
Tadashi Kunda

JP2004211644A

November 29, 2006

July 20, 2004

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Chubu Electric Power Co., Inc.
Shiden Engineering Co., Ltd.

B29C63/34; B05D7/22; F16L55/16; B29K105/08

JP6285985A
JP57087870A
JP5046305B2
JP9225398A

Hiroshi Ohama

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