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Stud Bolt Calculator

ASME B16.5 · Flange Bolting · Torque

ASME B16.5 Flange Bolt Calculator
Determines stud bolt size, quantity, length, and bolt circle diameter per ASME B16.5. Calculates recommended torque values using ASME PCC-1 methodology for leak-free joints.
Calculation Mode:

Flange Specifications

flanges

Bolt Material & Torque

% yield
%
Engineering Notes:
  • Bolt lengths are for raised-face (RF) flanges with standard gaskets per ASME B16.5 Table E-1
  • Torque calculated using T = K × d × F per ASME PCC-1 (K = nut factor based on lubricant)
  • Target bolt stress of 40-60% yield provides gasket seating while maintaining bolt integrity
  • For ring-type joint (RTJ) flanges, add 0.25-0.50" to bolt length

📚 Learn the Theory

Complete coverage of ASME B16.5 flange bolt sizing, torque calculations with K-factor, and gasket seating stress per ASME PCC-1.

Read Engineering Guide →

About This Calculator

Provides ASME B16.5 stud bolt specifications and ASME PCC-1 torque recommendations for pipeline and process flanges.

Key Features:

  • ASME B16.5: NPS 1/2" - 24", Classes 150-2500
  • Bolt Materials: A193 B7, B7M, B8/B8M, A320 L7
  • Torque: Calculated per PCC-1 with K-factor
  • BOM Mode: Generate consolidated bolt list

References:

  • ASME B16.5-2020
  • ASME PCC-1-2022
  • ASTM A193/A194

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