To suppress the motion of the shell part in operation and earthquakes and reduce the stress of support structure.
This pressure vessel is provided with a support structure below a hollow cylinder shell part 1, stood on the building base 6 with the support structure and contains high temperature and high pressure fluid. In this case, the support structure is constituted of a cylindrical support member 30 projecting to the lower periphery of the shell part 1 and annular movement prevention member supporting the shell part 1 freely sliding in horizontal direction via the support member 30 and suppressing the movement in upward direction or circumferential direction and the movement prevention member is fixed to the building base 6. The movement prevention member consists of a support plate 20 fixed to the building base 6 and letting the support member 30 slide and the movement prevention member fixed together with the support plate 20 and formed by floating prevention member 29 and an annular projection 32 suppressing the upward motion of the shell part 1 below a specific degree via the support member 30.
URAGAMI YOJI
KUBO MASAO
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