| 摘要 |
<p>A method of repairing a defective tube (5) in a heat exchanger of the tube-in-shell type comprises inserting a tubular sleeve (37) into the defective tube and extending through the tube from one tubeplate (7) to the other (9), and bonding the sleeve to each tubeplate. The extremities (39,41) of the sleeve are preferably welded to the outer surface (43,45) of the respective tubeplate. In repairing a defective tube which has one end which is bonded to a tubular tubeplate boss (21) having a bore which is of larger diameter than the external diameter of the tube, the diameter of a portion of the sleeve is preferably expanded to fit the bore of the tubeplate boss after insertion of the sleeve into the tube.</p> |
