Method of producing a composite pipe and such a composite pipe
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United States of America Patent
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Feb 2, 2016
Grant Date -
Mar 7, 2013
app pub date -
Mar 17, 2011
filing date -
Mar 25, 2010
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Abstract
A composite pipe comprises a polyetheretherketone innermost pipe around which a reinforcing overwrap is arranged. A protective sheath surrounds the overwrap. Such a composite pipe may be made by selecting a polyetheretherketone pipe having an outer region having a crystallinity of less than 25%; overlaying the selected pipe with overwrap; and subjecting the combination to heat, thereby causing the crystallinity of the outer region of the polyetheretherketone pipe to increase. The method reduces the risk of pipe failure.
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