Abstract:
864,685. Storing liquefied gases. CONCH INTERNATIONAL METHANE Ltd. June 23, 1959 [July 1, 1958 ; July 7, 1958], No. 21451/59. Class 8(2). A liquefied gas e.g., methane storage tank 14, Fig. 1, is lined with a plurality of downwardly inclined spaced superposed louvres 36 each overlapping the upper end portion of the adjacent lower louvre so as to provide vapour pockets 38 adjacent the vertical wall 16 of the tank which may be of circular or rectangular cross-section having its bottom 18 lined with cork or aerogel heat insulating material 40 in which are embedded metal pans 20 having upturned rims 28 extending between the lowermost louvres 36. Thermal expansion of the louvres is accommodated by a plurality of radially extending circumferentially spaced corrugations. In a modification the lower ends of louvres 36 Fig. 14 have skirts 110 which assisted by baffles 118 serve to support heat insulation material 112 held in porous bags 114.
Abstract:
853,585. Liquefied gas storage vessels. UNION CARBIDE CORPORATION. July 1, 1957 [July 16, 1956], No. 20748/57. Class 8(2). The evacuated insulation space 11, Fig. 1 between double walls 10a, 10b of a liquefied gas storage vessel is occupied by alternative layers 13, Fig. 2 of low conductivity material e.g., fibre glass and layers 14 of radiant heat reflecting material, e.g. aluminium foil. The layers 13, 14 may be wound round the cylindrical body of the vessel or may be arranged concentric therewith ; the domed top being occupied by supplementary layers of insulation. The radiant heat reflecting layers 14 which may also comprise tin, silver, gold and also metal coated plastic vary in thickness between 0À002 and 0À2 millimetres and the low conductivity layers 13 may comprise fibres of diameter between one and 50 microns or powder insulation or a mixture of fibres and powder. Specification 853,584 is referred to.