Abstract:
840,952. Liquefied gas storage containers. CHICAGO BRIDGE & IRON CO. Nov. 24, 1958 [Sept. 22, 1958], No. 37684/58. Class 8(2). Prevention of displacement of particulate heat insulating material 25, Fig. 2, e.g. silica gel, granulated cork, shredded foamed polystyrene, fibre glass located between inner and outer walls 21, 22 of a liquefied gas container subjected to thermal expansion and contraction is effected by means of a resilient blanket 24 between the walls and forming a layer completely surrounding said inner wall 21. As shown an upper hemispherical layer of resin bonded fibre glass sheaths the upper portion of the inner spherical vessel whilst a lower hemispherical layer lines the outer vessel. The latter is supported by column 26 and supports the inner vessel by rods 23. In a modification the resilient layer comprises a plurality of coil springs 33, Fig. 3, extending between the inner vessel 30 and a thin membrane 32 between which and the outer vessel 31 is located granular material 34. The springs may be of undulating strip form. In a further modification the resilient layer comprises a plurality of inflatable cells and in a still further modification a fluid impermeable membrane 32, Fig. 6, is resiliently held against granular material 34 by means of sub-atmospheric pressure maintained between the voids thereof.
Abstract:
967,753. Storing liquefied gas. GAZ DE FRANCE. July 26, 1961 [Aug. 10, 1960], No. 27165/61. Heading F4P. A liquefied gas storage chamber 3 is excavated from a pit 2 dug in the ground and water is injected around the chamber during the filling thereof with liquefied gas to form about the chamber a layer of frozen water or of a watersoaked and frozen material. An inspection plate 5 is supported in a circular recess 4 in the pit 2 and piping 6, 7 and 8 for removing fluid from the chamber extends through the plate 5. Holes 9, 10, 11 and 12 are provided for injecting the water; the lower ends of the holes may lie close to the pit 2 and the chamber 3. Heat probes 13, 14 and 15 may be provided so that the temperature of the ground may be taken. A layer of sand or loose rocks or stones is disposed on the'plate 5, and this layer may be sprinkled with water so that it will freeze and form a fluid-tight seal. The water is preferably injected when the chamber walls are at a temperature below 32‹ F.
Abstract:
869,130. Tankers. CONCH INTERNATIONAL METHANE Ltd. March 17, 1960 [April 9, 1959], No. 9471/60. Class 113. [Also in Group XXVIII] Liquified methane tanks 22 are arranged in pairs in the hold of a double-hulled ship and adjacent pairs are separated by transverse coffer dams 18 which together with the inner surfaces of the walls of the inner hull 14 are lined with heat insualting material 20. Specifications 854,705, 854,706 and 854,707 are referred to.