Kellogg Equivalent Pressure Method - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

Converts piping axial forces and bending moments into an equivalent pressure on the flange. After the conversion is complete, the software adds this equivalent pressure to the pressure defined in the load case. It then compares this sum to the allowable pressure rating for the flange at the appropriate temperature. (The pressure-temperature table is defined in the model input and the temperature is specified on the Load Cases tab of the Static Analysis - Load Case Editor.) The formula for the total equivalent pressure displays below:

Peq = 16M/(p)G3 + 4F/ (p)G2 + PD

Where:

Peq = total equivalent pressure (for checking against flange rating)

M = calculated bending moment on flange

G = diameter of effective gasket reaction

F = absolute value of the calculated axial force on flange

PD = pressure specified in the load case (for example, P1 for W+T1+P1)

SHARED Tip The allowable pressure rating will be multiplied by the occasional load factor specified on the Load Cases tab.