Corrosion-resistant pipe coupling structures

Details Corrosion-resistant pipe coupling structures Corrosion-resistant pipe coupling structures

1982-03-16

1985-04-09

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Lined

285286, 2853824, 285383, F16L 1500

Patent

active

045097763

ABSTRACT:
A corrosion-resistant pipe coupling made of carbon steel has on its inner surface an intermediate annular projection directed radially inward. At least an innermost part of the annular projection is formed or corrosion-resistant material such as stainless steel. The annular projection is covered by a corrosion-resistant annular member or which is secured by friction welding, electron beam welding, an adhesive or mechanical engagement. The annular member prevents corrosion of the coupling by corrosive fluids flowing in pipes.

REFERENCES:
patent: 474322 (1892-05-01), Harrington
patent: 2017994 (1935-10-01), Spang
patent: 3253841 (1966-05-01), Ahmad
patent: 3266821 (1966-08-01), Safford
patent: 3442537 (1969-05-01), Courtot et al.
patent: 3620555 (1971-11-01), Hinds et al.
patent: 4305607 (1981-12-01), Westerlund et al.
patent: 4400019 (1983-08-01), Fruck

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