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It’s worth noting that the only correct method of transmitting torque through a flange joint is via friction of the two mating surfaces.
If the friction between the two flanges is overcome (by not having the correct type and number of bolts, tightened to the correct torque), then the bolts are placed in shear….which is an unacceptable situation.
A bolt should never be in shear in a torque transmission situation.
Cheers,
Glen
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