Process for reducing stress corrosion in a weld by applying an overlay weld
AssigneeGeneral Electric Company
InventorsRodney E. Hanneman, Richard M. Chrenko, Donald B. Kittle
Life of this patent
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Abstract
The stress corrosion tendency of a welded pipe in service in a nuclear reactor water line is reduced by applying to the outside of the pipe a secondary weld bridging the primary weld of the joint beyond the axial extremities of the primary weld heat affected zone and particularly that part of the zone at the inner surface of the pipe.
Claims5
The method of eliminating or substantially reducing the stress corrosion tendency in a weld constraint zone terminating within a primary weld heat affected zone of a butt welded austenitic steel pipe joint in a pipe in service in a nuclear reactor which comprises the step of applying to the outside of the pipe a secondary or overlay weld extending across the pipe joint and bridging on each side of the pipe joint beyond the axial extremities of the primary weld heat affected zone at the inner surface of the pipe.
Dependencies are inferred from the claim text.