Bolt Torqueing VS Bolt Tensioning, Which Is Better?

 Bolt Torqueing VS Bolt Tensioning, Which Is Better?


There are two methods for changing a bolt's tension: torquing and bolt tensioning. Bolts are tightened and loosened using torque, which is the capacity to apply rotational force. Bolt tensioning refers to the tightening of the bolt's nut against the bolt's head. By tightening it, you increase the bolt's rigidity and stop it from slipping while you're using it. The size of the bolt typically affects how a torque wrench is used, but bolt tensioners can be utilised with practically any size of bolt. Read the article to know which one is better between bolt tensioning and bolt torquing. 


Torque


The stud or bolt need to be tightened to a certain load. By rotating the nut, you can stretch. The thread's angle of inclination causes the nut to revolve on the clamped component's surface. The degree of friction between the component surface and the nut grows to a specified level as the clamping load increases.


Main feature

  • Cheaper

  • More versatile

  • More widely used

  • Typically utilised for fasteners, bolts and joints to achieve optimum integrity

  • Accuracy is lessened compared to hydraulic bolt tensioning

Torque has a greater cost-effectiveness than tensioning, which is its main benefit. The success and precision of torque tightening, however, are largely dependent on the user's level of expertise with the torque wrench. 


The k factor is also essential for obtaining the optimum torque and tension relationship. (Note: The friction coefficient and the k-factor are not the same.) To determine how much torque must be delivered, the proper k-factor must be known. Along with these factors, you also need to take into account the bolt diameter and the friction of the bearing surface.


Additionally, the torque can also be extremely precise with practice. The tension is more precise.


Tools used to measure torque are typically accurate to within 30%. The actual bolt load of your fastener ranges from 35 KSI to 65 KSI if your desired load is 50 KSI. A rather straightforward method is torque. 


The torque accuracy can be considerably greater than 30% when the assemblers are properly taught, there is adequate lubrication, and the k factor is calculated correctly (based on experiments). Getting an accuracy of +/- 15%, for instance, is straightforward for a skilled assembler.


Tension


Stretching the stud or bolt to a specific load is the goal of tensioning. By applying pressure, stretch the handle.


The hydraulic cylinder's pushing or pulling force accomplishes this. After that, you can manually tighten the nut with a torque wrench, only needing a minimal amount of rotational effort. For the tensioning cylinder to be connected and removed after use, there must be some more threads above the nut.


Main feature:


  • Most frequently applied on big bolts

  • Typically more costly than other methods

  • Extremely precise

  • Dependable and simple to control


Unlike torque, tension does not exert a torsion force on fasteners. Bolt tensioners are primarily utilised with rotating machinery like long threaded bolts and reciprocating rods. For large diameter bolts, tensioning has an additional benefit. Large-diameter bolts may be tightened more effectively.


Tension measurements are accurate within 10%. Your fastener's actual bolt load ranges from 45 to 55 KSI if the desired pressure is 50 KSI. Torque wrench is simpler and cheaper; tensioning is both. In order to use a bolt tensioner, skilled employees are needed.

Torquing is adaptable, flexible and more affordable. Making your choice only based on price would be incorrect, though. It can be expensive to resolve a problem with a crucial flange joint in the future.


More precision is provided via bolt tensioners. They are more complicated, frequently more expensive, and faster. Remember that some joints may require to be tensioned gradually if the space between the studs is small. A suitable bolting design should be employed in that situation.


Why Go for ABS Group Services?


Our team of more than 150 highly trained specialists, who have been industry leaders for almost 2 decades, has provided bolt tensioning services and other on-site machining services to various renowned organizations. 







Content Sources :- ABSGroup

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