Specifies the effective inside diameter for pressure thrust from the manufacturer's catalog. If left blank, or zero, then no axial thrust force due to pressure is calculated.
Typical units (depending on your unit system):
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in
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mm
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cm
For all load cases, including pressure, CAESAR II calculates the pressure thrust force tending to blow the bellows apart. Many manufacturers give the effective area of the expansion joint: Aeff. The Effective ID is calculated from the effective area by:
Effective ID = (4Aeff / p)1/2