Secondary confinement pipe having segments with interlocking rib and groove joints and coextruded sealant layers #4
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United States of America Patent
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Nov 6, 1990
Grant Date -
N/A
app pub date -
Jan 23, 1989
filing date -
Jan 23, 1989
priority date (Note) -
Expired
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Abstract
A secondary confinement pipe is assembled from identical segments of extruded polyvinylchloride with tenon and groove formations along longitudinal edges enabling the segments to be interfitted. The joints are sealed by flexible synthetic resin coextruded with one of the formations at respective edges.
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