Heat exchanger and method of making

Details Heat exchanger and method of making Heat exchanger and method of making

F - Mech Eng,Light,Heat,Weapons

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F28F 1/42 (2006.01) B23P 15/26 (2006.01) F28D 7/10 (2006.01) F28F 9/02 (2006.01) F28F 13/12 (2006.01)

Patent

CA 1123423

ABSTRACT OF THE DISCLOSURE A method of making a rigid stainless steel, cor- rosion resistant, weldment, tubular heat exchanger and the resulting heat exchanger for exchanging heat between fluids in which a pair of steel tubes with stainless surfaces are arranged in internested spaced relationship, providing a pair of cylindrical steel fittings with stainless steel surfaces at each end of the outer tube and welded to the outer tube on a shoulder of the outer tube by projection welding in which the contacting surfaces of the fitting and the tube are electric resistance-heated to a molten condition, the ends of the innter and outer tubes being similarly projection welded together.

349895

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