Electric heating – Metal heating – By arc
Patent
1994-09-23
1996-06-25
Shaw, Clifford C.
Electric heating
Metal heating
By arc
29890031, 228184, B23K 900
Patent
active
055302190
ABSTRACT:
A welded bracket for use in repairing a shroud in which one or more shroud girth seam welds have experienced stress corrosion cracking. A plurality of the welded brackets are placed around the outer circumference of the shroud at a plurality of azimuthal positions at the elevation of the top guide support ring. Each bracket is constructed by welding curved plates. Welding productivity is increased by using an extremely thin weld joint design with a non-circular cylindrical, thin welding electrode having an elongated cross-sectional shape. During welding, the elongated dimension is aligned parallel with the length of the weld joint. This combination enables joining of the welded bracket parts with both the initial weld joint preparation and the completed weld having a uniquely thin width and with a high aspect ratio of depth to width. This high aspect ratio reduces the number of weld beads needed to build the weld joint. The high aspect ratio, in combination with torch travel speeds of 12 or more inches per minute, increase welding productivity, thereby reducing reactor downtime resulting from shroud repair.
REFERENCES:
patent: 1995546 (1935-03-01), Meier
patent: 4285503 (1981-08-01), Calhoun et al.
patent: 4294662 (1981-10-01), Guignard et al.
patent: 4299658 (1981-11-01), Meuschke et al.
patent: 4409466 (1983-10-01), Commeau
patent: 5402570 (1995-04-01), Weems et al.
GE Proposal No. 894-1D7DM-EK1, Revision 1, Core Spray Line Crack Repair, Dec. 9, 1993.
Shroud Repair, Description of Alternatives, Alan N. Baker, Mar. 1994.
Apr. 22, 1994 letter from Al Kozusko & Thomas Sliva of AEA O'Donnell, Inc. to Victor Bain of General Electric Company with annexed Description, facsimile cover sheet and drawings.
Presentation No. 94-004 dated May 2, 1994, by Welding Services Inc. and Structural Integrity Associates, Inc.
Patent Abstracts of Japan, vol. 7, No. 179 (M-234), Aug. 9, 1983 & JP-A-58081592 (Shimamoto Takijirou), May 16, 1983.
Charnley James E.
Erbes John G.
Grycko Lawrence M.
Jensen Grant C.
Offer Henry P.
General Electric Company
McGinness James E.
Shaw Clifford C.
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