Marine riser and method for making
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United States of America Patent
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app pub date -
May 9, 2006
filing date -
May 9, 2006
priority date (Note) -
Abandoned
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Abstract
A method for forming an aluminum alloy riser includes forming a riser tube from an aluminum alloy. At least one flanged coupling is formed from the aluminum alloy. The flanged coupling is friction stir welded to one end of the tube. In one embodiment, an end of the tube is radially plastically expanded prior to welding the flange to the one end of the tube.
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