| 摘要 |
PURPOSE:To greatly reduce thermal stress applied to a loading arm by supplying ultra-low temperature gas into the flow passage of the aforesaid loading arm to previously cool the loading arm, and thereafter loading a ultra-low temperature fluid. CONSTITUTION:Upon loading a fluid with use of a loading arm 1, the valve 10b of a fluid transport pipe 10 is first closed, and then with a valve 32 previously opened, a pump 22 is operated. A ultra-low temperature fluid such as liquid nitrogen contained in a tank 21 is sprayed from a nozzle 31 into the flow passage of an inboard arm 5 or an outboard arm 7. Hereby, the loading arm 1 is uniformly and effectively cooled by a stream of the vaporized ultra-low temperature fluid. After cooling is complete, the valve 32 is closed, and the valve 10b is opened to operate a transfer pump 36, thus allowing a ultra-low temperature fluid such as LNG to be loaded drom a storage tank 34. |
