1. What is the Flange Bolt Torque Equation?

The Flange Bolt Torque Equation calculates the required torque for tightening flange bolts based on the torque coefficient, axial force, and bolt diameter. It ensures proper sealing and structural integrity in flange connections.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( T \) — Torque (Nm)
• \( K \) — Torque coefficient (dimensionless)
• \( F \) — Axial force (N)
• \( D \) — Bolt diameter (m)

Explanation: The equation calculates the required torque based on the relationship between the applied force, bolt diameter, and the friction coefficient.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for ensuring proper bolt tension, preventing leakage in flange joints, and maintaining structural integrity in mechanical assemblies.

4. Using the Calculator

Tips: Enter the torque coefficient (typically 0.15-0.25 for lubricated bolts), axial force in Newtons, and bolt diameter in meters. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical K value for flange bolts?
A: For lubricated steel bolts, K typically ranges from 0.15 to 0.25. The exact value depends on surface finish and lubrication.

Q2: How does lubrication affect the K value?
A: Proper lubrication reduces the K value, meaning less torque is required to achieve the same bolt tension.

Q3: Why is accurate torque important in flange connections?
A: Proper torque ensures uniform bolt loading, prevents gasket damage, and maintains seal integrity under operating conditions.

Q4: What factors can affect torque accuracy?
A: Surface finish, lubrication quality, bolt material, and measurement accuracy can all affect the actual torque required.

Q5: Should torque values be verified after installation?
A: Yes, torque values should be verified after initial tightening and periodically during service to ensure maintained integrity.