Do high-pressure flanges need to be tightened after shutting down high-pressure hydrogenation?
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After the high-pressure hydrogenation unit is shut down, do the high-pressure flanges need to be tightened? Are there any requirements for tightening? Are there any devices that have been used for this?
Reply to 1# byrant: We perform thermal tightening on the high-pressure flanges that are not removed, when the temperature drops to around 280 degrees