Pipes and tubular conduits – Repairing – Patches
Patent
1998-12-02
1999-11-16
Brinson, Patrick
Pipes and tubular conduits
Repairing
Patches
138 97, 427230, 264269, B05D 722
Patent
active
059839481
ABSTRACT:
A method of repairing an existing pipeline including a main pipe and a branch pipe, includes the steps of introducing a first lining pig, a first batch of a resin, and some other pigs into the branch pipe and supplying a first batch of a liquid into the branch pipe until the first lining pig reaches a branching position; introducing a second lining pig, a second batch of a resin, and some other pigs into the main pipe and supplying a second batch of a liquid into the main pipe until the second lining pig reaches an inner end thereof; drawing back the second batch of the liquid out of the main pipe so as to cause the second batch of the resin to move back toward an open end of the main pipe, thereby forming a resin lining layer on the internal surface of the main pipe; drawing back the first batch of the liquid out of the branch pipe so as to cause the first batch of the resin to move back toward an open end of the branch pipe, thereby forming a resin lining layer on the internal surface of the branch pipe.
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patent: 5873390 (1999-02-01), Satake et al.
Itagaki Masaaki
Morita Kenji
Yagi Shuichi
Brinson Patrick
Tokyo Gas Co. Ltd.
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