Double wall cargo tank for transporting cryogenics

Details Double wall cargo tank for transporting cryogenics Double wall cargo tank for transporting cryogenics

1973-09-11

1976-09-07

Blix, Trygve M.

Ships

Building

Freighters

62 55, 220 9LG, B63B 2516

Patent

active

039788083

ABSTRACT:
A double wall tank for the transportation of cryogenic materials such as liquefied natural gas by ship. The inner wall of the tank is the primary barrier and defines the cargo space. The primary barrier is substantially planar and is liquid and gas-impervious. A plurality of primary structural support webs are welded to the inner surface of the primary barrier and extend into the cargo space. The primary structural support webs preferably comprise a plurality of web rings extending between the centerline longitudinal bulkhead and the sides of the inner tank and having plurality of tension trusses extending transversely in the inner tank and connecting opposite sides of the web rings. A plurality of stiffeners are welded to the outer surface of the primary barrier and extend substantially perpendicular to the plane of the primary structural support webs. The outer wall of the tank is the secondary barrier, is spaced from the primary barrier and is supported by the stiffeners. The secondary barrier is formed from thin sheets of metal, is non-self-supporting and is liquid and gas-impervious. Insulation, preferably in the form of a plurality of insulation panels, is located outside of the secondary barrier for thermally insulating the tank.

REFERENCES:
patent: 3312076 (1967-04-01), Clarke et al.
patent: 3319431 (1967-05-01), Clarke et al.
patent: 3811593 (1974-05-01), Bridges et al.

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