| 摘要 |
A sleeving method wherein a metal sleeve (16) is inserted into a tube (10) so as to bridge a defective region of the tube (10). The sleeve (16) has teeth (40) on the outside thereof which tightly contact the inside surface of the defective tube (10) and create a labyrinth-type seal. The sleeve (16) is then internally pressurized in the area where the teeth (40) are located. This expansion of the sleeve (16) causes the teeth (40) to engage the tube (10). The other end of the sleeve (16) can then be either similarly attached to the tube (10) or welded to the tube (10). Next, the remainder of the sleeve (16) is expanded which causes the sleeve (16) to shrink in length which results in the teeth slightly penetrating the inside surface of the tube thereby creating a leak tight seal therebetween. |
