Method of manufacturing a weld neck flange
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United States of America Patent
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-
Oct 8, 1985
Issued Date -
N/A
app pub date -
Jul 30, 1984
filing date -
Aug 16, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pipe flange with a heavy welding neck which is hot formed from a circular section of steel plate having a small co-axial hole in the center. The steel around the hole is shear-formed downward and outward by a tapered die plug which is forced through the small hole, forming an integral neck on the flange. A supporting ring die is radiused at its inner corner to form a suitable fillet radius at the junction of the neck with the flange proper. A suitable preforming or post-forming operation may be required to compensate for any deflection in the workpiece out of planar configuration.
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