Method of covering inside surface of steel connection part
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United States of America Patent
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Sep 4, 2012
Grant Date -
May 21, 2009
app pub date -
Jun 15, 2006
filing date -
Jul 5, 2005
priority date (Note) -
Expired
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Abstract
A method of covering the inside surface of a steel connection part having an empty inside volume defined by the inside surface, with a liner constituted by a layer of substantially uniform thickness of a thermoplastic material. The connection part including at least two open tubular ends suitable for being connected respectively to at least two steel pipe elements, each including the same internal liner. A rotary molding method is implemented in which the connection part acts as a mold. A connection part obtained by the rotary lining method is provided, and methods of assembling a connection part, as obtained by rotary lining, with a likewise lined pipe element.
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