| 摘要 |
<p>1,107,662. Storing liquified gases. TECHNIGAZ. 28 May, 1965 [1 June, 1964], No. 22908/65. Heading F4P. The pressure of nitrogen gas within the heat insulation space 4 between a liquid methane container 2 and an outer tank 3 is maintained within predetermined limits above the pressure of the surrounding atmosphere by connecting space 4 by ducting 5, 9, 9a to a flexible chamber 8 within a container 10 supplied with compressed air from a source 13 whereby the nitrogen can pass between the space 4 and the flexible chamber 8 without loss of volume. The upper limit of the nitrogen pressure is governed by the setting of an air relief valve 14 on the container 10 and the lower limit by the pressure available from a nitrogen make-up source 6 and pressure reducing valve 7. The outer tank 3 also has a relief valve 15 set to open at a higher pressure than said upper limit.</p> |
