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Flange Bolt Torque Equation:
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The Flange Bolt Torque equation calculates the required torque for tightening flange bolts based on the torque coefficient, applied force, and bolt diameter. It ensures proper sealing and structural integrity in flange connections.
The calculator uses the Flange Bolt Torque equation:
Where:
Explanation: The equation calculates the torque required to achieve proper bolt tension, accounting for friction and geometric factors through the torque coefficient.
Details: Accurate torque calculation is crucial for preventing flange leaks, ensuring joint integrity, avoiding bolt failure, and maintaining safety in pressurized systems.
Tips: Enter torque coefficient (typically 0.2-0.3 for lubricated bolts), applied force in Newtons, and bolt diameter in meters. All values must be positive numbers.
Q1: What is a typical torque coefficient value?
A: For lubricated steel bolts, K is typically 0.20-0.30. For dry or plated bolts, K can range from 0.15-0.35 depending on surface conditions.
Q2: Why is proper bolt torque important?
A: Proper torque ensures adequate clamping force to prevent leaks while avoiding over-tightening that can damage bolts or flanges.
Q3: How does lubrication affect torque calculation?
A: Lubrication reduces friction, allowing higher clamping force for the same applied torque. Always use the appropriate K value for the lubrication condition.
Q4: Should torque be checked after installation?
A: Yes, torque should be verified after initial tightening and periodically during service, as bolts can relax over time.
Q5: Are there industry standards for flange bolt torque?
A: Yes, standards like ASME B16.5 and API provide guidelines for flange bolt torque based on bolt material, gasket type, and service conditions.