Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1980-09-17
1983-01-04
Callaghan, Thomas F.
Pipe joints or couplings
With casing, lining or protector
Lined
285173, 285286, 285333, 285417, F16L 914, F16L 1500
Patent
active
043669719
ABSTRACT:
A corrosion resistant tube assembly is disclosed comprising a corrosion susceptible metal tubing having an outside surface, an inside surface and end surfaces. Peripheral end portions of the tubing are provided with an overlay of corrosion resistant metal extending along a portion of the outside surface and across the end surfaces of the peripheral end portions of the corrosion susceptible metal tubing. The overlay has an inside surface and an outside surface provided with threads at a depth less than that which would expose the outside surface of the corrosion susceptible tubing. The assembly also includes a corrosion resistant, tubular metallic liner having an outside surface disposed adjacent the inside surface of the corrosion susceptible metal tubing, and end surfaces extending beyond the end surfaces of the corrosion susceptible metal tubing. The end surfaces of the liner are secured to the inside surface of the overlay around the circumference thereof such that all inside surfaces of the tube assembly comprise corrosion resistant material. Multiple tubes of this invention may be longitudinally aligned and threaded to one another, or to a common metallic convector having a corrosion resistant inside surface.
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Allegheny Ludlum Steel Corporation
Callaghan Thomas F.
Viccaro Patrick J.
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