As compared to traditional tightening methods, bolt tensioning is one of better ways of tightening large diameter bolts. The concept works well for a number of critical industrial applications and is extremely accurate. It can be used for tightening bolts in industries that use heat exchangers and pipeline flanges to name a few. Here are some quick facts.
Why use bolt tensioning?
For many industries, where accuracy matters more than anything else, bolt tensioning is probably the best option available. With the help of hydraulic tensioners, you don’t have to bother about torsional loading, and there are no added concerns related to direct loading either, which can lead to damages during the assembly process. For most of the critical tasks and applications related bolt and stud tightening, hydraulic tensioners work perfectly and are extremely easy to use. As mentioned earlier, accuracy, effectiveness and repeatability are the core advantages with such tools. These are also feasible for applications that need automation.
Tips for buying
If you want invest in hydraulic tensioners, you need to find first a manufacturer you can rely on. Industrial requirements vary, and so do the styles and sizes of hydraulic tensioners. You can find a number of manufacturers who can handle custom orders, but before you get ahead, check the overall prices of the products. Ideally, you will get an estimate, which can be discussed further. Once the price has been agreed upon, you need to ensure that the concerned manufacturer will not budge in offering support. Apart from the basic support that’s required for the right use of bolt/hydraulic tensioners, you also need to get aftersales assistance. Make sure that the manufacturer is a known one and has worked in the industry for a minimum of five to ten years. You can also check their clientele to know more about the kind of work and size of orders they can manage.
Even loading in each stud is important, especially in applications with gaskets. HTI recommends multiple Hydraulic Stud Tensioners for applications with more than one stud. These Hydraulic Tensioners are inner connected to each other and to the pump. As the hydraulic pressure increases, the tension in each stud is the same, and the flange comes together simultaneously and evenly.
Time and Labor Saving
Multiple Hydraulic Stud Tensioners, working together, save time. Using Hydraulic Tensioners is usually faster than using hydraulic torque wrenches. Compared to torque, using one Hydraulic Tensioner for every four studs on the flange, or “25% cover” will typically cut the tightening time by fifty percent (50%). With one Hydraulic Tensioner for every two studs, or “50% cover”, the time can be cut by an additional one-third (33%).