Flexible heat-insulated pipe-line for in particular cryogenic fl

Details Flexible heat-insulated pipe-line for in particular cryogenic fl Flexible heat-insulated pipe-line for in particular cryogenic fl

1981-02-02

1983-11-29

Shepperd, John W.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138122, 138131, 138139, 138148, F16L 1100

Patent

active

044176031

ABSTRACT:
A fluid-conveying, flexible, lagged pipe for building up in particular a liquefied natural gas carrying pipe-line connecting an off-shore platform for working submarine oil fields or like underwater pools to a tanker ship and comprising an inner tubular duct including an inner helical metal spring, an intermediate layer of yielding composite material and an outer helical metal spring like the inner spring but longitudinally offset by half a pitch of turns with respect to the latter so that the turns of said outer spring be nested between those, respectively, of said inner spring.

REFERENCES:
patent: 1179578 (1916-04-01), Sundh
patent: 1259952 (1918-03-01), Beckmann
patent: 2858854 (1958-11-01), Daggett
patent: 3388724 (1968-06-01), Mowell et al.
patent: 3453716 (1969-07-01), Cook
patent: 3527258 (1970-09-01), Farr
patent: 4287245 (1981-09-01), Kikuchi

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