STEELFLANGE

Tool 01

Bolt Torque Calculator

Estimate the torque required to develop a target bolt stress on a flange stud. Choose the bolt size, grade, lubrication, and target stress as a percentage of tensile strength. The calculation uses T = K x F x D with published tensile stress areas. Results are a reference for planning. Confirm against gasket manufacturer load requirements and ASME PCC-1.

Inputs

Calculated Result

473 ft-lbs

Target wrench torque using T = K x F x D

Clamp Load (F)
37,875 lbs
Bolt Stress
62,500 psi
Friction Factor (K)
0.15

Disclaimer: This calculator returns a reference value based on the standard T = K x F x D model with published tensile stress areas and ASTM tensile strengths. Actual joint makeup should follow the gasket manufacturer's seating stress, ASME PCC-1 procedures, and any project torque tables. Use a calibrated tool and a proper crosswise tightening pattern.

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