Formula Used:
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Twisting moment is defined as when we twist the end of the bar either clockwise or counterclockwise then bending moment will form. It is a measure of the torque applied to a structural element.
The calculator uses the formula:
Where:
Explanation: This formula calculates the twisting moment based on flange pressure, gasket area, friction coefficient, bolt diameter, and number of bolts.
Details: Accurate twisting moment calculation is crucial for proper flange joint design, ensuring adequate sealing pressure and preventing leakage in piping systems and pressure vessels.
Tips: Enter all values in appropriate units. Flange pressure in Pascals, gasket area in square meters, bolt diameter in meters. All values must be positive numbers.
Q1: What is flange pressure?
A: Flange pressure refers to the pressure exerted onto the flange (a projecting flat rim, collar, or rib on an object, serving for strengthening or attachment).
Q2: How is gasket area determined?
A: Gasket area is the space occupied by a flat surface or the shape of an object, typically calculated based on the gasket dimensions.
Q3: What are typical torque friction coefficient values?
A: Torque friction coefficients are typically based on friction coefficients of 0.12 between threads and 0.14 between nut and washer or head and washer.
Q4: Why is bolt diameter important?
A: Bolt diameter is a chord that runs through the center point of the circle and significantly affects the torque distribution and stress concentration.
Q5: How does number of bolts affect twisting moment?
A: The number of bolts distributes the load and affects the required torque per bolt for proper flange sealing.