| 摘要 |
PROBLEM TO BE SOLVED: To reduce piping work and cost by integrating a reception piping and return BOG piping into one, as viewed from the outside in a low tempera ture liquid (LNG or the like) receiving station, and prevent the generation of troubles, such as liquid shock phenomenon caused by the condensated return BOG in the piping. SOLUTION: A piping line of double pipe structure composed of Invar (R) material is arranged at a part between an LNG tanker and an LNG storage tank, and the LNG is passed to be received in the storage tank form the tanker 1, on the side of the inner pipe 11 of the double pipe, while the BOG is passed to be received in the tank in the LNG tanker from the LNG storage tank, on the side of the outer pipe 12. The sides of inner and outer pipe 11, 12 are composed of invar material having a small linear expansion coefficient. A part of a cold insulator 13 on the side of outer pipe 12 is cut to expose the outer pipe 12 to the atmosphere.
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