Pipe joints or couplings – With casing – lining or protector
Patent
1980-08-11
1983-08-16
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
285 53, 285107, 2853342, 2853343, 2853344, 285383, 285369, 285423, 285DIG16, 156293, 156294, F16L 5500
Patent
active
043987540
ABSTRACT:
A connection between two pipes of a pipeline includes a pair of coupling members having externally threaded ends with sealing surfaces projecting from the ends. The threaded ends are advanced into opposite ends of an insulating sleeve fabricated of electrically nonconductive material. Internally threaded end portions of the sleeve are separated by an annular recessed portion. A resilient, nonconductive annular spacer is retained within the annular recessed portion. The spacer includes a pair of inclined inner sealing surfaces positioned in overlying sealing relation with the coupling member sealing surfaces and an outer sealing surface sealingly engaging the insulating sleeve to form a fluid and pressure tight seal around the annular space between the coupling members and the insulating sleeve in addition to electrically insulating the coupling members from each other. Upon the application of internal fluid pressure within the coupling members the sealing surfaces of the annular spacer are wedged into increasing sealing engagement with the coupling member sealing surfaces and the insulating sleeve so that the sealing forces generated between the respective components increase proportionally with an increase in the pipeline pressure.
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Caroleo Steven J.
Schmitt Edward L.
Adams John M.
Arola Dave W.
Kerotest Manufacturing Corp.
Price, Jr,. Stanley J.
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