Methods and apparatus for use in pipe lining

Details Methods and apparatus for use in pipe lining Methods and apparatus for use in pipe lining

F - Mech Eng,Light,Heat,Weapons

16

L

189/12

F16L 55/165 (2006.01) B29C 63/46 (2006.01)

Patent

CA 1328830

METHODS AND APPARATUS FOR USE IN PIPE LINING ABSTRACT A pipe (11) e.g. a water main is lined by moving a thermoplastic liner (10) through a die (16) to reduce the cross-section of the liner, and introducing the reduced liner into the pipe. The liner subsequently moves into engagement with the inner surface of the pipe by recovery in cross-section on release of axial tension. A flexible expansion device may be moved through the liner to expand the liner into engagement with the pipe. The die may be mounted on the pipe and be in separable parts. The minimum cross-section of the die may be on a part replaceable by another part defining a different cross-section. The liner material may be polyolefin, polyamide, polyvinyl chloride, ABS.

611334

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