Method and apparatus for relining an underground gas line or...

Details Method and apparatus for relining an underground gas line or... Method and apparatus for relining an underground gas line or...

F - Mech Eng,Light,Heat,Weapons

16

L

61/4.8

F16L 1/00 (2006.01) F16L 55/165 (2006.01)

Patent

CA 1176855

ABSTRACT OF THE DISCLOSURE A method and apparatus for repairing or relining an underground pipeline without having to excavate the pipe is enabled by attaching an expandable sealing unit to the end of a predetermined length of flexible tubing and feeding it through the pipeline. The flexible tubing is fed through the existing pipeline from a point beyond where the existing pipeline exits the earth, usually within the basement of a building. Once positioned in the desired location, the expandable sealing unit is expanded to form a tight seal at the desired location within the pipe by means of heating the expandable sealing unit by a heating unit connected to the source of energy through electrical conductors which pass through the flexible tubing.

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