Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1985-12-23
1989-07-04
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Insulated
285136, 285190, 285276, 285904, 285915, F16L 1112
Patent
active
048445142
ABSTRACT:
A device forming a swivel joint for a cryogenic liquid with at least one central duct for the flow of said cryogenic liquid through the joint and comprising at least one annular duct co-axially surrounding said central duct for the return of the cold gas originating from the vaporization of the moving liquid, said annular duct comprising gas inlet and outlet pipes; a stationary portion and a portion mounted in rotating relation to said stationary portion by means of a ball or roller bearing operating at a temperature close to ambient temperature, a double set of sealing gaskets also operating at a temperature close to ambient temperature; and heat insulation of at least the parts of said stationary and movable portions forming said annular duct and contacted by said cold gas, so arranged as to prevent any cooling-down of said sealing gaskets through convection or radiation; the device being applicable in particular to the off-shore transfer of liquefied natural gas.
REFERENCES:
patent: 3411526 (1968-11-01), Schaefer
patent: 3921273 (1975-11-01), Kondo et al.
patent: 4018059 (1977-04-01), Hatch
patent: 4103938 (1978-08-01), Lasater et al.
patent: 4323268 (1982-04-01), Wilson
Chauvin Jean-Michel
Chilardi Jean-Pierre R. F.
Arola Dave W.
Entreprise D'Equipments Mecanique et Hydrauliques E.M.H.
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