I Calculating Torque for 100 Ton Steel Tube Press

[Tony2560]

I have a problem,
I need to calculate the torque required to rotate a steel tube 150mm OD, 90mm ID which is being pressed against a identical tube with a force of 100 Tons
also the estimated torque imparted if the above parts come into contact with one part static and the second part rotating at 200 rpm

 

[tech99]

100t = 10^5 kg = 10^6 N.
To gain a ball-park idea, assume mu = 1
Torque = diameter x force = (150/1000) x 10^6 = 1.5 x 10^5 N-m
If one part is moving or stationary will make a difference to mu.
Power to rotate tube = torque x speed = 1.5 x 10^5 x (200/60) = 5 x 10^5 W
You will require about 500kW to rotate the tube, which may melt, depending on its mass/length.