Consultation on hot tightening of high-temperature reactor flange bolts, as well as high-temperature pipeline flanges and valve bolts?

2017-06-28View Original

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There is a fluidized bed reactor with a diameter of 4.6 meters and a height of 33 meters; it is made of material Q345R. The upper and lower ends of the reactor are connected via flanges. The design temperature is 420°C, while the design pressure is 0.3 MPaG. The operating temperature is 380°C, and the operating pressure is 70 KPaG. Before feeding material into this reactor, it needs to be heated to 380°C. How many times does heat tightening need to be carried out to raise the temperature from room temperature to 380°C, and at what temperatures does this take place? Additionally, for high-temperature pipelines operating at 360°C, at what temperatures must the bolts of components such as flanges, valves, and expansion joints on these pipelines be heat-tightened? Which expert can provide a detailed answer? Thank you!

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Consultation on hot tightening of high-temperature reactor flange bolts, as well as high-temperature pipeline flanges and valve bolts?

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