Help calculate the bolt pre-tension of the reactor
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The reactor has a design pressure of 2 Mpa, a design temperature of 550 degrees, a diameter of 700 millimeters. The bolts used are of size M36 and M27; there are 32 bolts in total, and the gaskets used are graphite-metal wound gaskets
Why are there two different bolt sizes? Please be more specific – what is the diameter, and how many bolts of each type are required along with their specifications?
A reactor with a bottom flange; there are 32 M36 fastening bolts. It also has an upper flange, with 32 M27 fastening bolts
Yes, what is the preload torque required at cold temperature and the tightening torque at hot temperature?
Is this the preload torque at low temperature? Is there a specific value for it? What is the tightening torque at high temperature then? Thank you
Take the larger value in the hot state, and the smaller value in the cold state
Calculations are carried out in accordance with the requirements of the standard \"Technical Specifications for the Installation of Flange Joints\" GB/T.