Corrugated metal pipe
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United States of America Patent
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Mar 31, 2015
Grant Date -
Jul 3, 2014
app pub date -
Mar 7, 2014
filing date -
Dec 14, 2011
priority date (Note) -
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Abstract
A metal pipe of single piece construction including a wall formed of a single corrugated metal sheet. The sheet has opposing first and second edges extending longitudinally along the sheet. The wall includes a seam that is formed by abutting portions of the first and second edges. The seam extends helically about and along a length of the wall. The sheet has a cross-sectional profile defining 3 corrugation peaks at an exterior wall surface and 3 flat segments, wherein each corrugation peak is separated from an adjacent corrugation peak by a respective one of the 3 flat segments. The sheet has a flattened sheet width of approximately 27 inches and a finished sheet width of approximately 24 inches. The wall defines a pipe diameter of at least 96 inches.
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