Corrosion resistant heat exchanger element and method of manufac

Details Corrosion resistant heat exchanger element and method of manufac Corrosion resistant heat exchanger element and method of manufac

1979-06-28

1981-10-27

Richter, Sheldon J.

Heat exchange

With coated, roughened or polished surface

291574, 165173, 165178, 165180, 285158, F28F 916, F28F 1904

Patent

active

042968046

ABSTRACT:
A heat exchanger element is provided with small-bore copper tubing jacketed with perfluoroalkoxy resin wherein the ends of the jacketed copper tubing are each telescoped over the end of a stainless steel nipple having a raised shoulder at its end and an annular groove adjacent thereto. A stainless steel ferrule surrounding a sleeve of polytetrafluoroethylene overlies the joint and for a short distance to either side and is contracted particularly in the region of said nipple groove to squeeze the copper tubing thereinto behind said shoulder. This interlocks the tube with the nipple and establishes a fluid-tight seal between the ferrule, the nipple and the metal tube. The nipples are joined to headers or manifolds by welding or in similar manner.

REFERENCES:
patent: 1901143 (1933-03-01), Brunner
patent: 2704074 (1955-03-01), Butler
patent: 2800145 (1957-07-01), Peierls et al.
patent: 3050786 (1962-08-01), St. John et al.
patent: 3794360 (1974-02-01), Bachle et al.
patent: 4193180 (1980-03-01), Press

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