Applications & Industries
Bolt clamp load is critical everywhere!
There are several reasons for loosing clamp load in bolt joints:
Vibrations, changing temperatures and operation loads are among the most important.
Equally risky is the actual tightening procedure at initial installation. Tightening with some sort of hydraulic or pneumatic torque wrench there is a large uncertainty on how much of the specified torque that are actually resulting in axial clamp load. The uncertainty is coupled to the friction in the joint.
All in all, monitoring and control of the actual clamp load at installation and during the life of the bolt joint is needed to guarantee its’ intended functionality.