When it comes to industrial construction particularly in the bolt torqueing service area, a tight bolt is a good bolt. Bolt that are not tightened enough can prove to be quite dangerous as the structure it is holding will be compromised. When workers in the industrial construction project or in fabrication shops are tightening bolts, they have to make sure that all bolts have a uniform tightness meaning the tension they hold will be all the same. But that doesn’t really mean they have to use the same amount of torque on all of the bolts due to the fact that torque doesn’t translate into tension in a fixed ratio due to other factors.
Those who work in bolt torqueing services in factories know that even the smallest variations in the nut and bolt can mean a difference in the way tension is produced from the torqueing. Bolt that are rusty and old need more torque to achieve a desired tension force compared to smooth and new bolts. If you are working with an old bolt you will find that you will need to twist it more to have the same tension with a new bolt. This is because old and rusty bolts no longer have as much strength compared to new ones. Even when you compare new bolts small variations in their shape can mean a significant difference in the torque to tension relationship.
When you are working in bolt torqueing service, it is a common practice to first grease and lubricate the bolts before torqueing them. The application of grease will help to reduce the needed amount of torque in order for a bolt to be tightened. Dry and unlubricated bolts need a little extra torque to become tight compared to lubricated ones.
Tightening a bolt is very important in industrial construction due to the fact that it is the nuts and bolts that hold together the several pieces in a framework. However, the integrity of the bolt itself may become compromised and that will cause it to break. In cases like this, one would think that the bolt was tightened too much but if you get down to it, it was actually torqued too much. When you look at how tight a bolt is you look at the tension which has to be a uniform force. However, the torque in uniform tension bolts isn’t the same so one bolt can have more torque than the other even though they have similar tension.
During the tightening of a bolt, it is important to make sure that the bolt is not put under too much torque but still have the right tension needed. There are bolts that hold as much as 30klbs of tension but if its torque just goes over 1klbs then it would eventually break. In order to avoid the breakage of bolts, bolt torqueing service workers have to make sure to use grease to lubricated the bolts and to get rid of old bolts that aren’t strong and need more torque.