The Babcock & Wilcox Company

David E Merker

Joel G Feldstein

Paul S Ayres

Charles M Weber

Louis E Stark

David P Edmonds

Henry Q Bibb

Dennis D Hartwig

A sleeve containing an explosive charge which is explosively welded along a tapered end to the inner surface of a tube for repairing a damaged section of the tube. No mechanical support is needed along the outer surface of the tube despite the explosive expansion and welding of the sleeve. The explosive charge is tapered at the end of the sleeve. A charge assembly for carrying the explosive charge includes a flange for centering the sleeve in the tube and for establishing a stand-off distance between the sleeve and the tube.

Apparatus for explosively welding a sleeve into a heat exchanger tube

Method for explosively welding a sleeve into a heat exchanger tube

A method and apparatus for eliminating microfissure defects in shape melted austenitic material components by closely controlling the deposited weld bead shape to a geometry where the underbead shape has no sharp discontinuties. Oscillation of the welding torch head during the process is used to smooth out the weldbead shape and is especially adapted for use with gas metal-arc welding processes.

Method and apparatus for controlling weld bead shape to eliminate

An apparatus and method for radially expanding a tubular member and comprising first and second spaced apart end caps rigidly connected to each other by a post. An expandable bladder fixed to each end cap and extending around the post to define an annular space. A propellant disposed in the annular space and ignition apparatus associated with the propellant. The propellant being of the type which burns rapidly to generate large amounts of gas for expanding the bladder. The tubular member being disposed around the bladder for radial expansion.

Method and apparatus for tube expansion

Explosive welding device

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Minerva, OH, United States of America

David E Merker