Help with Proper Torque Spec

Hello,

I am trying to determine a minimum torque requirement for sealing a flame proof enclosure that has 26 M14 bolts. Per the manufacturer, the couple of tightening of A2-70 M14 bolts of 117N/sq. mm.

Using 7mm as the radius of the cross section, we get a required force of the bolt to be approximately 18 kN (117 * pi * 7^2). For the tightening, we’re using a driver (force straight down) as opposed to a wrench, so I’m not sure what the arm radius was, but let’s say it’s 200mm (~8 inches) ar, that gives us a torque of 3600Nm, or an ungodly number of inch pounds.

Can you please let me know what I’m doing wrong? I would appreciate it. Thank you.

Joe