How to determine the value of P in the wall thickness formula (PXDN) / (2.3X[σL]-P)
Thread Content
Question: The formula for calculating the wall thickness of a valve body is: (PXDN) / (2.3X-P). (This formula is from Lu Peiwen’s Valve Design Manual.) In the formula, P refers to the operating pressure; should this be the rated pressure, or 1.5 times the rated pressure (since 1.5 is used in the pressure testing of the valve body)? Thank you!!!!
Why isn’t anyone participating in the discussion? So disappointed. . .
The calculated pressure refers to the pressure used to determine the thickness of a component at the corresponding design temperature. The design pressure refers to the maximum pressure specified at the top of the container, and together with the corresponding design temperature, it serves as the design load condition. Therefore, the calculated pressure is not equal to the design pressure. Under normal circumstances, the design pressure should be greater than the calculated pressure.
In my understanding, it should refer to the nominal pressure of the valve.
The calculated pressure is not equal to the design pressure