How to calculate the torque of a flange bolt?
Flange Bolt Torque Sequence 1 PASS 1 Torque Sequence: Torque to a maximum of 30% of the final torque value in accordance with the torque sequence. Check that gasket is getting compressed uniformly. 2 PASS 2 Torque Sequence: Torque to a maximum of 60% of the final torque value. 3 PASS 3 Torque Sequence: Torque to the final torque value (100%).
When to use hydraulic Torquing on a flange bolt?
The clamp load produced during tightening is higher than 75% of the fastener’s proof load. To achieve the benefits of the pre-loading, the clamping force in the screw must be higher than the joint separation load. When the bolt loading requires a torque higher than 678 Nm (500 ft-lbs.) to be applied, hydraulic bolt torquing is recommended.
Which is the correct sequence of torque passes for a flange?
Flange Bolt Torque Sequence. After the three basic torque passes are completed, repeat torquing the nuts at least once using the final torque in a “CRISS-CROSS” manner until no further rotation of the nut is observed. For easy handling, bolt numbering shall be done clockwise around the flange with the following sequence.
What are torque specifications for Land Rover Defender?
The manual does not state what grade of bolt these generic torque specifications are for (e.g. 8.8 or 10.9), but it may be assumed that any “special” grade bolt would have its own torque specified. The following recommendations are also made by Land Rover: Always tighten a nut or bolt to the recommended torque value.
How to find the torque of a flange bolt?
Flanges Look up flange bolt sizes and torque patterns in three taps with Flange Bolt. Just enter the flange size, type, and class, and the tool instantly shows the ASME values for: 1.
How to calculate the torque of an API bolt?
Enter 105000 for B7/L7 standard bolting. Enter percent of bolt Yield Strength. 50% specified by API 6A. 70% specified by API 17D. Modified bolting used in many API flanges requires de-rating. Reference API Spec 6A to identify these flanges and determine their de-rated working pressure.
How to calculate torque for ASTM A193 B7 flanges?
Use the following Torque Calculator for ASTM A193 B7 and ASTM A320 L7 bolting, as specified in API 6A, 16A and 17D for flanges. TPI for 1″ and smaller are UNC, 1-1/8″ and larger are 8 UN. Some flanges can be over-tightened to the point that the ring groove or the flange can be damaged.
What is the grade of torque lock nut clamp?
The prevailing torque lock nut clamp loads are listed at 75% of the proof loads specified for the appropriate grade bolt: Grade C – SAE J429 Grade 8, FNL Grade 9 – FNL Grade 9 bolt, Grade F – SAE J429 Grade 5, Grade G – SAE J429 Grade 8.