F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/12, 257/15
F16L 55/16 (2006.01) F28F 9/02 (2006.01)
Patent
CA 1063043
ABSTRACT OF THE DISCLOSURE A method is disclosed for removing and replacing a ruptured expansion joint in the shell of a shell and tube heat exchanger having fixed tube sheets and at least one expansion joint in the shell thereof in which it is un- necessary to cut through the tubes of the heat exchanger. The method comprises: cutting through the shell wall trans- versely on each side of the ruptured expansion joint; cutting away the ruptured expansion joint to form two shell portions separated by an opening; forming an annular ring having an outer diameter greater than at least one tube sheet of the heat exchanger around the outer surface of each of the two shell portions adjacent the opening; welding each annular ring to the outer surface of its respective shell portion; sliding a portion of new shell having an inner diameter slightly greater than the outer diameter of the annular rings and containing a new expansion joint over one of the tube sheets of the heat exchanger and positioning it such that it straddles the two rings with each of its ends adjacent to a ring; and welding each end of the portion of shell containing the new expansion joint to its adjacent ring. An improved heat exchanger is also disclosed.
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