Title:
METHOD FOR INCREASING THE FATIGUE RESISTANCE OF WELDED PIPES
Document Type and Number:
WIPO Patent Application WO2003026827
Kind Code:
A8
Abstract:
The invention relates to a method for increasing the fatigue resistance of welded pipes, especially longitudinally welded large diameter pipes, comprising a weld seam (1) having a projection on the inner and outer sides. To this end, the sharp-edged, geometric transition obtained after welding, between the weld seam (1) and the adjacent pipe body (2), is rounded at least on the inner side by means of chip removing machining.
Inventors:
KNAUF GERHARD (DE)
MAREWSKI ULRICH (DE)
REEPMEYER OSCAR (DE)
MAREWSKI ULRICH (DE)
REEPMEYER OSCAR (DE)
Application Number:
PCT/DE2002/003259
Publication Date:
January 29, 2004
Filing Date:
September 11, 2002
Export Citation:
Assignee:
MANNESMANN ROEHREN WERKE AG (DE)
KNAUF GERHARD (DE)
MAREWSKI ULRICH (DE)
REEPMEYER OSCAR (DE)
KNAUF GERHARD (DE)
MAREWSKI ULRICH (DE)
REEPMEYER OSCAR (DE)
International Classes:
B21C37/08; B21C37/30; B23D79/00; B23C3/12; B23D79/02; (IPC1-7): B23D79/02; B21C37/08; B23K37/08
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