Method of manufacturing bimetallic tubes

Details Method of manufacturing bimetallic tubes Method of manufacturing bimetallic tubes

1982-06-01

1985-08-06

Envall, Jr., Roy N.

Electric heating

Metal heating

Of cylinders

219 95, 228131, 228132, 228243, H05B 500, H05B 600

Patent

active

045338060

ABSTRACT:
A method of manufacturing bimetallic tubes is disclosed. In this method, after an inner tube is inserted into an outer tube, the resulting tube assembly is heated, while pressurizing the inside of the inner tube with a gas, in the presence or absence of a solder material. When using no solder material, the materials of the inner and outer tubes are so selected that a thermal expansion coefficient of the inner tube is smaller than that of the outer tube.

REFERENCES:
patent: 1242589 (1917-10-01), Preschlin
patent: 2371348 (1945-03-01), Murray
patent: 3025596 (1962-03-01), Ward et al.
patent: 3397445 (1968-08-01), Ulmer et al.
patent: 3408728 (1968-11-01), Fickett et al.
patent: 4049184 (1977-09-01), Rozengart et al.

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