Method of lining a pipe with a tube including passing heated flu

Details Method of lining a pipe with a tube including passing heated flu Method of lining a pipe with a tube including passing heated flu

1989-04-04

1990-10-23

Ball, Michael W.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

156287, 156294, 264516, 264573, B29C 6334

Patent

active

049650360

ABSTRACT:
The present invention is for a method of lining a pipe with a rigid to semirigid plastic tube which is inserted through the pipe by inflating the tube by application of heat and pressure. The method is characterized in that the tube has a large wall thickness and is formed with a multiplicity of bores extending through the tube wall axially thereof and arranged in parallel at a spacing circumferentially of the tube. The tube is heated by passing a heating fluid through the bores. The tube having the large wall thickness can be uniformly heated throughout the entire wall thickness so as to be inflated fully by the application of pressure, free of the likelihood of insufficient inflation or rupture and to line the pipe.

REFERENCES:
patent: 79220 (1868-06-01), Forsyth et al.
patent: 3996967 (1976-12-01), Takada
patent: 4474726 (1984-10-01), Ohta et al.
patent: 4585371 (1986-04-01), Jones-Hinton

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