Loading and unloading system

Abstract

The liquefied hydrogen loading and unloading system 1A includes a loading arm 11, a recovery pipe 5, a pressure holding pipe 6, and a flushing pipe 7. The loading arm 11 includes a plurality of swing joints 13. Each swing joint 13 has a first sealing member separating the aforementioned liquefied hydrogen flow path from the recovery area, a second sealing member separating the aforementioned recovery area from the pressure holding chamber, and a third sealing member separating the aforementioned pressure holding chamber from the flushing area. The recovery pipe 5 passes through the aforementioned recovery area via the swing joint 13, the pressure holding pipe 6 passes through the aforementioned pressure holding chamber via the swing joint 13, and the flushing pipe 7 passes through the aforementioned flushing area via the swing joint 13. A hydrogen concentration meter 91 is provided in the flushing pipe 7 downstream of the swing joint 13. none

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