Process and prepressing pipe for laying a pipeline in the earth
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United States of America Patent
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-
Nov 12, 1985
Grant Date -
N/A
app pub date -
Oct 22, 1982
filing date -
Oct 23, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for laying a prepressed pipeline and pipe advantageously employed therein are described. Concrete pipe sections have an inner lining of a polymeric material anchored by flexible projections to the inner surface of the pipe. The thickness of the lining is increased at the ends of the pipe to form an elongated sealing surface and a stress absorbing region. A compression seal may thereby be employed. Stresses created by the seal are absorbed both by the thickened region and by a shoulder formed in the concrete wall of the pipe. In use, compression is maintained as the result of friction between the pipe well and the surrounding earth.
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