| 摘要 |
PURPOSE:To facilitate detection of minute leakage, by providing two types of hermetically sealed pipe structures in the vicinity of weak points of piping such as welded parts. CONSTITUTION:An outer pipe 46 is attached to annular protruded parts 44, which are attached to the outer part of a pipe 41 in the vicinity of welded part 42 by bolts and nuts 44. A rupture disk 48, which is broken when the pressure of leakage detecting fluid 47 filled in a gap formed by the pipe 41 and the outer pipe 46 becomes larger than limit pressure, is provided in the outer pipe 46. A minute leakage detecting sensor 49 is provided in the vicinity of the welded part 42. Even though cracks are generated at the weak point 42 such as welded parts of the pipes and working fluid 43 leaks, the leakage can be detected by the sensor 49 while the amount is minute because the space is hermetically sealed. When the cracks are expanded and the amount of leakage is increased, the pressure of the leakage detecting fluid 47 is increased, and the rupture disk 48 is broken. Even though the cracks are further expanded and the pipe 41 is separated therefrom, the pipe is constrained by the outer pipe 46, and damage of neighboring equipment is not caused. |
