Method for water leakage prevention in pipeline.

摘要

A method for water leakage prevention in a portion (10) connecting a first pipeline (12) to a second pipeline (14) having one end communicated with a portion of the first pipeline, comprises the steps of passing elastically deformable drawing means (46,48) from the side of the other end of the second pipeline to the side of one end of the first pipeline, engaging an impermeable cut-off member having an expandable hose portion (22) and a flange portion (24) provided integrally with one end of the hose portion with the drawing means at the side of one end of the first pipeline at the hose portion, drawing the cut-off member from the side of the hose portion into the first and second pipelines by drawing back the drawing means toward the other end of the second pipeline under the engaged condition, and disposing the cut-off member in the first and second pipelines so that the flange portion is positioned within the first pipeline and that the hose portion extends within the second pipeline. <IMAGE>