| 摘要 |
PROBLEM TO BE SOLVED: To reduce stress in small diameter piping, etc., which stress is caused by the difference of the thermal deformation in large diameter piping and small diameter piping. SOLUTION: A piping apparatus comprises the large diameter piping 1 which at least partially moves because of thermal deformation caused by temperature change during an installed time and an operating time, the small diameter piping 3 one end of which is connected to the large diameter piping, and a support 7 for preventing a lateral movement of the small diameter piping. The support is arranged so as to shift within the range smaller than the movement of the jointed portion by preliminarily applying a load to the small diameter piping in the direction of the movement of the jointed portion of the small diameter piping and the large diameter piping due to the thermal deformation. The large diameter piping and the small diameter piping are used, for example, as the piping in a nuclear power plant. COPYRIGHT: (C)2005,JPO&NCIPI
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