DISPOSITIF POUR OBTURER LES TUBES DEFECTUEUX DES ECHANGEURS DE CHALEUR

摘要

The device for closing off a defective heat exchanger tube includes a metallic plug having a blind hole in which a sleeve of plastic, cardboard or the like is mounted. The plug has a cylindrical cross-section at the forward end to fit in the tube and a conically tapered outer surface at the open end. The sleeve encloses an explosive charge within the plane of the conically tapered outer surface of the plug and is provided with an enlarged end portion which projects from the plug. This end portion is conically tapered and slotted to jam in the heat exchanger tube. Upon detonation, the explosive charge expands and welds the conically tapered surface portion of the plug to the heat exchanger tube to close off the end of the tube.