Method for rating stick electrodes for pipe welding

Details Method for rating stick electrodes for pipe welding Method for rating stick electrodes for pipe welding

2007-12-04

2007-12-04

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

By arc

C219S13700R, C228S103000

Reexamination Certificate

active

11355552

ABSTRACT:
Stick welding electrode rating and ranking procedures are provided for determining stackability performance of stick electrodes for pipe welding operations. The rating technique involves performance of a standardized vertical down weld procedure using a stick electrode to form a weld bead in a test workpiece groove, in which the electrode is maintained during welding at a substantially constant angle relative to the workpiece groove. The electrode is advanced toward the groove at a slow speed to deposit molten metal in the groove while keeping the molten metal above the stick electrode end or the arc thereof without dripping. The resulting bead distance is measured along with the welding time and the stick electrode is rated according to a ratio of the weld time and the bead distance.

REFERENCES:
patent: 5676857 (1997-10-01), Parker
patent: 5961863 (1999-10-01), Stava
patent: 5981906 (1999-11-01), Parker
patent: 6093906 (2000-07-01), Nicholson et al.
patent: 6703585 (2004-03-01), Suzuki
patent: 6730875 (2004-05-01), Hsu

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