Method for heat-treating straight bead welded pipes
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United States of America Patent
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-
Dec 4, 1990
Issued Date -
N/A
app pub date -
Jul 25, 1988
filing date -
Jan 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for welding and heat treating straight bead welded pipes made of austenitic, ferritic or austenitic-ferritic rust-resistant steel includes welding a straight bead on a pipe forming a welding seam region, a heat affected zone and a remaining region, and annealing the pipe after welding the straight bead by only partially solution-annealing in the welding seam region and the heat affected zone, while heat treating the remaining region at a reduced temperature. An apparatus is also provided for carrying out the method.
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