Method for producing bimetallic line pipe
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United States of America Patent
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Oct 6, 2009
Grant Date -
Nov 17, 2005
app pub date -
Mar 4, 2005
filing date -
Apr 12, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention involves a system and method for producing bimetallic pipe. In one embodiment of the present invention, the method includes inserting an inner shell into an outer shell and reducing the outer shell to securely engage the inner shell by drawing the outer shell and inner shell through a die without the use of a mandrel placed in the inner shell. In another embodiment of the present invention, the method includes inserting an inner shell into an outer shell and reducing the outer shell to securely engage the inner shell by sizing the outer shell using at least one roller stand.
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