Method of lining a pipe with a tube including passing heated fluid through the bores of the tube
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United States of America Patent
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Oct 23, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Apr 12, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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