Refrigeration tubing joint

Details Refrigeration tubing joint Refrigeration tubing joint

1986-07-23

1987-09-15

Husar, Cornelius J.

Pipe joints or couplings

Elbow

285287, 285381, F16L 1300, F16L 5800

Patent

active

046935010

ABSTRACT:
A heat exchanger tube assembly having one end of a copper tube soldered to the end of an aluminum tube, and a method of minimizing galvanic corrosion at the soldered joint. The aluminum tube, having a roughened inner surface for enhanced heat transfer, fits inside the copper tube at the soldered joint. A heat shrinkable thermoplastic tube having a thermosetting adhesive inner coating is placed around the joint and then heated. The heat shrinks the thermoplastic tube, causing it to contract and to adhere tightly against and around the joint. The plastic tube with its adhesive inner coating protects the joint from atmospheric moisture and thus inhibits galvanic corrosion that would eventually create a leak in the tube joint.

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