Include Axial Force in Expansion Stress - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

Enables the software to include calculated axial force in the expansion stress (SE). Choose one of the following settings:

No

Exclude axial forces from the (Expansion) Displacement Stress Range value. (This is Se in Eq. (17) of B31.3.)

|Sa| + Se

Include the absolute value of the axial force to the (Expansion) Displacement Stress Range, and report the sum as the (Expansion) Displacement Stress Range, Se. This selection is more conservative than (|Sa| + Sb)2.

(|Sa| + Sb)2

Include the absolute value for the axial force to the bending term in the (Expansion) Displacement Stress Range equation (Se, Eq (17) in B31.3). This selection is less conservative than |Sa| + Se. This option more closely follows theory.

Default

Follow the recommended setting for the axial force in expansion stress based on the piping code you specified for the job. (For example, the B31.3 piping code recommends using the (|Sa| + Sb)2 equation for axial force. So, when you set this configuration setting to Default, if the job uses the B31.3 piping code, the software uses the (|Sa| + Sb)2 option for calculating axial force in the expansion stress.)