Lined pipeline vent
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United States of America Patent
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Jul 25, 2006
Grant Date -
Apr 22, 2004
app pub date -
Oct 12, 2001
filing date -
Oct 14, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to apparatus for use in venting pipelines that have a plastic lining such as these used for transporting hydrocarbon fluids. A pipeline assembly comprises a pipeline (2), a corrosion resistance liner (3), and a micro-annulus (4) located between said pipeline and liner. The pipeline assembly also comprises a venting means (5) adapted for fitment in or through the corrosion resistance liner (3), wherein the venting means (5) allows gas to flow from the micro-annulus into the center of the pipeline assembly but not in the opposing direction.
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