1. What is Flange Bolt Torque Calculation?

Flange bolt torque calculation determines the appropriate tightening torque for bolts in flange connections. Proper torque ensures adequate sealing and prevents joint failure while avoiding over-tightening that could damage components.

2. How Does the Calculator Work?

The calculator uses the flange bolt torque equation:

Where:

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

Explanation: The equation calculates the required torque based on bolt dimensions, applied force, and friction characteristics represented by the torque coefficient.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for ensuring proper flange sealing, preventing leaks, maintaining structural integrity, and avoiding bolt failure in pressurized systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is a typical torque coefficient value?
A: For lubricated bolts, K is typically 0.15-0.25. For dry bolts, it can range from 0.20-0.30 depending on surface conditions.

Q2: How do I convert bolt diameter from mm to m?
A: Divide the millimeter value by 1000. For example, 20 mm = 0.020 m.

Q3: What factors affect the torque coefficient?
A: Surface finish, lubrication, thread condition, and material properties all influence the torque coefficient value.

Q4: Why is proper torque important in flange connections?
A: Proper torque ensures uniform bolt loading, prevents gasket crushing, maintains seal integrity, and prevents joint failure under operating conditions.

Q5: Should torque values be verified after installation?
A: Yes, torque should be verified and re-checked after a period of operation, especially in critical applications, as bolts can relax over time.