Sleeve preparation method

Details Sleeve preparation method Sleeve preparation method

B - Operations, Transporting

23

K

26/155, 113/83

B23K 1/20 (2006.01)

Patent

CA 1196175

16 ABSTRACT OF THE DISCLOSURE The method comprises applying a braze material to a sleeve in a manner so that the sleeve may be attached to a tube so as to bridge the defective region of the tube. The sleeve is constructed to have a groove on the outside surface thereof that extends around the entire circumference. The groove is filled with braze material and a flux is applied to the braze material in a manner to prevent the braze material and flux from becoming removed. Once such a sleeve has been inserted into the defective tube, the sleeve is internally expanded in the area of the sleeve wherein the groove is located. The expansion of the sleeve in the area wherein the groove is located causes the braze material to closely contact the inside surface of the tube. The other end of the sleeve can then be either similarly placed in contact with the tube or welded to the tube. Next, the area of the tube wherein the braze material is located is internally heated so as to create a brazed joint between the sleeve and the tube. When the joint has cooled, a leaktight joint is formed between the sleeve and the tube.

411575

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