Double-wall tube for a heat exchanger

Details Double-wall tube for a heat exchanger Double-wall tube for a heat exchanger

1985-04-29

1987-09-22

Marcus, Stephen

Pipes and tubular conduits

Plural duct

Surrounding radially spaced duct with axially spaced...

29455R, 228132, F16L 918

Patent

active

046948643

ABSTRACT:
A double-wall tube for a heat exchanger and method for producing same, the tube being formed by two tubular walls (1, 2) mounted one inside the other with a very small clearance (3)and then made to have a tight fit therebetween, the outer surface of the inner wall (2) and the inner surface of the outer wall (1) being interconnected by a thin layer of brazing metal in regions (4) which are discontinuous both in the circumferential direction and in the longitudinal direction of the tube. The brazed regions (4) represent 5 to 15% of the confronting surfaces of the inner wall (2) and outer wall (1) of the tube. The invention is in particular applicable to steam generators of fast neutron nuclear reactors.

REFERENCES:
patent: 3235947 (1966-02-01), Sohlemann
patent: 3299417 (1967-01-01), Sibthorpe
patent: 3977439 (1976-08-01), Lambert
patent: 4285396 (1981-08-01), Schwoerer et al.
Howard H. Manko, "Solders and Soldering", Second Edition, McGraw-Hill Pub., at pp. 92-93.

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