Diameter reduction insertion method for lining tubular members

Details Diameter reduction insertion method for lining tubular members Diameter reduction insertion method for lining tubular members

1994-08-19

1997-07-08

Maki, Steven D.

Plastic and nonmetallic article shaping or treating: processes

Prestressing solid body and uniting in stressed condition

264269, 264280, 264285, 264295, 405174, B29C 6342

Patent

active

056457847

ABSTRACT:
A method and apparatus are shown for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A series of downsizing rollers reduce the outside diameter of the liner a preselected amount. A series of shaping rollers form the downsized liner into an ellipse, thereby allowing the downsized liner to be guided around bends and turns into the interior of the tubular member. After insertion, the liner is allowed to expand to substantially its original outside diameter to secure the liner within the tubular member.

REFERENCES:
patent: 3720070 (1973-03-01), Raves
patent: 4504171 (1985-03-01), Florence
patent: 4923663 (1990-05-01), McMillan
patent: 5114634 (1992-05-01), McMillan et al.
patent: 5340524 (1994-08-01), McMillan et al.
Pipeline & Utilities Construction, "New Lining Technique", Jul. 1987, p. 13 .

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