Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1985-01-07
1986-08-12
Scanlan, Jr., Richard J.
Pipe joints or couplings
With casing, lining or protector
Insulated
285347, 285354, F16L 1902
Patent
active
046052488
ABSTRACT:
An improved insulating union is provided of the type designed to prevent electrolytic corrosion in flow lines. The tail sub is physically separated from both the threaded sub and nut by a plastic layer. An annular groove is conventionally provided in the threaded sub for an O-ring to seal between the plastic layer and the threaded sub. Another O-ring groove is provided in a tail sub for sealing between the tail sub and the plastic layer to prevent leakage of high pressure gas from the union. The O-ring is inserted in the tail sub groove, and the plastic insulating layer is thereafter molded over the end of the tail sub.
REFERENCES:
patent: 2867463 (1959-01-01), Snider
patent: 3115354 (1963-12-01), Bowan et al.
Goldsmith John W.
Rullman Paul B.
Helmreich Loren
Horn Alec H.
J. M. Huber Corporation
Price Robert L.
Scanlan, Jr. Richard J.
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