Tube-in-shell heat exchangers

Details Tube-in-shell heat exchangers Tube-in-shell heat exchangers

1983-11-28

1985-05-28

Ostrager, Allen M.

Heat exchange

With repair or assembly means

165158, F28F 902, F16L 4108

Patent

active

045194459

ABSTRACT:
For protecting a tube to tube plate joint in a tube-in-shell heat exchanger, or for repairing a joint of the same kind which has become defective, a sleeve is employed to bridge the joint and is sealingly secured at one end to the tube plate within the bore thereof and at the other end within the tube. The joint with the tube is a brazed joint. The inside surface of the tube is machined to provide a tapered surface and the exterior surface of the sleeve is machined to provide a matching tapered surface. A land and grooves are formed in the tapered surface, the sleeve is fitted within the tube with the surfaces in engagement, and the brazed joint is made with braze material contained in grooves flowing into a capillary clearance which is of uniform and reproducible dimension from joint to joint.

REFERENCES:
patent: 3317222 (1967-05-01), Maretzo
patent: 3782450 (1974-01-01), Swozil

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