Foster Wheeler Energy Corporation

Foster Wheeler Development Corporation

Irwin Berman

Joseph W Schroeder

Robert Henschel

Anthony M Mack

Bernardino M Alfano

Charles F Nash

Joseph F Sheehan

A method for explosively welding a tube to a tubesheet having a cladding extending over an outer surface thereof. A layer of material is bonded over the cladding which absorbs the energy from the shock wave formed by the explosive welding, to prevent breaking up the bond between the cladding and the tubesheet.

Tubesheet and a method for explosively welding a tube to a tubesheet

An explosive activated assembly for repairing a heat exchange tube in which a grooved metal casing is inserted into the tube to be repaired and has a plurality of projections extending from the outer surface thereof. A force-transmitting member extends within a bore formed in the casing and contains an explosive member so that, upon detonation of the explosive member, the force-transmitting member and the casing are expanded radially outwardly to drive the projections against the tube. A booster is located within the casing and adjacent the charge and is activated by a transfer cord connected to an externally located detonator. The casing is formed with an extension that extends over a portion of the transfer cord and has a hole through which the cord extends to contain the debris and vapor caused by the explosion.

Debris free plug assembly for heat exchange tubes

A patch unit apparatus and method for expeditiously closing openings in metal walls by explosive welding. The patch unit comprises a metal plate having on one side an explosive charge located near the plate perimeter, and having on the opposite side a continuous double angled recess surface. After cleaning the wall surface, the patch unit is placed centrally over an opening to be closed and initially secured to the wall by an adhesive material provided on the plate side opposite from the explosive. If necessary, a mechanical type seal can also be used for improved sealing of the patch unit to the wall. The explosive charge is then detonated to explosively force the patch plate unit against the wall at high velocity, so as to weld the plate onto the metal wall to permanently close the opening, and thereby provide substantially the original strength to the metal wall.

Explosive welding patch unit and method

A method of measuring dimensional variations in a workpiece in which two spaced points are formed on the workpiece and their images transferred to an image transfer material. After the workpiece has been subjected to a mechanical and/or thermal load and then allowed to return to its original unloaded state, the images of the points are again transferred to an image transfer material and the difference in spacing between the images of the points is compared to ascertain the dimensional changes.

Growing community of inventors

Montclair, NJ, United States of America

Irwin Berman