Process for plugging a tube of a straight-tube heat exchanger

Details Process for plugging a tube of a straight-tube heat exchanger Process for plugging a tube of a straight-tube heat exchanger

1991-08-08

1992-12-01

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

376286, 29890031, 285 19, G21C 1900, F28F 1100

Patent

active

051679078

ABSTRACT:
The tube (4) to be plugged is cut at its ends adjacent to the first and to the second branch (14, 15) and the metal of the junction zones (16, 16') of the tube (4) with each of the branches (14, 15) is eliminated. At least one portion of the tube (4) adjacent to at least one of the branches (14, 15) is cut and eliminated. Into each of the ends of the tube (4) in place inside the heat exchanger is introduced a plug (24, 30) of tubular shape, the diameter of which is smaller than the inside diameter of the tube (4), so that the plug has a closed end (24a, 30a) inside the tube (4) and an opposite end located inside the corresponding branch (14, 15). The plugs (24, 30) are fixed in place in the branches (14, 15), and a continuous sealing weld is made between each of the plugs (24, 30) and the corresponding branch (14, 15 ), the tube (4) having some freedom of movement in the longitudinal direction in relation to the plugs (24, 30).

REFERENCES:
patent: 2344698 (1944-03-01), Howe
patent: 3962767 (1976-06-01), Byerley et al.
patent: 4081325 (1978-03-01), Aubert et al.
patent: 4413765 (1983-11-01), Tracy
patent: 4941512 (1990-07-01), McParland
"Research Disclosure" 181-May 1979, GB, (18146), p. 211.

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