Bolt Torquing vs Bolt Tensioning
Bolt Torquing vs Bolt Tensioning
(OP)
Please advise me when should we use bolt torque wrench (torquing) and bolt tensioning ?
when we want to joint flange 26" #900, should we use bolt tensioner ?
thanks for advise
Regards
when we want to joint flange 26" #900, should we use bolt tensioner ?
thanks for advise
Regards





RE: Bolt Torquing vs Bolt Tensioning
For high pressure flanges I suggest you use a tensioner to get the correct gasket loading.
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RE: Bolt Torquing vs Bolt Tensioning
Torquing, as implied above, can also be utilized. However, then one foregoes the previously-described benefits. Furthermore, in order to deal with the inherent innacuracies of any torque-tightening procedure of critical flanges, the bolt bolt stress MUST be verified after tightening. This is imperative since it will enable the operator to "tune" the applied torque at each fastener so that it applies the necessary clamp load. In so doing, one will usually find that it's necessary to apply a different torque to each fastener in oredr to ensure that they are all equally "tight".
RE: Bolt Torquing vs Bolt Tensioning
Among these benefits are:
- Assurance of uniform bolt loading and gasket compression
- Quicker assembly, disassembly of the joint
- Safety, prevention of accidents
- Prevention of fastener damage
The disadvantages, as I see them are:
- Cost, training, maintenance of tensioning equipment
- Need for adequate thread length above the nut for device engagement
RE: Bolt Torquing vs Bolt Tensioning
RE: Bolt Torquing vs Bolt Tensioning