RapidBoltBolting Calculators & Engineering Tools
Practical tools for engineers and procurement teams specifying flange bolting — torque and bolt load estimation, ASME B16.5 stud requirements and the dimensional standards behind them.
Stud Bolt Torque & Bolt Load Calculator
Estimate target bolt load and tightening torque by grade, thread size, percentage of yield and coating friction factor, with the ASME B16.5 stud requirement for the flange.
Flange Bolting & Dimensional Tables
Stud quantity, diameter and length for ASME B16.5 Class 150 through 2500, stud weight charts, thread data and material cross-references between ASTM, EN and UNS.
Dimensional Standards Reference
How stud bolts, hex bolts and nuts are measured and toleranced, thread series comparisons and the dimensional standards that govern each fastener type.
A note on using these tools
Every figure here is a reference estimate to support specification, take-off and material selection. Bolt-up on site is governed by the joint's own procedure, which accounts for gasket seating stress, flange condition, tightening sequence, tool accuracy, the actual coating friction data and any hot re-torque requirement. Where a calculation drives a safety-critical joint, send us the flange schedule and service conditions and our team will review the bolting specification with you.