BS 7159 Pressure Stiffening - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

Displays the method used to calculate the effect of pressure stiffening on the bend SIFs. The BS 7159 code explicitly requires that the effect of pressure stiffening on the bend SIFs be calculated using the design strain (this is based upon the assumption that the FRP piping is fully pressurized to its design limit). This is the default method for CAESAR II.

When the piping is pressurized to a value much lower than its design pressure, it may be more accurate to calculate pressure stiffening based on the actual pressure stress, rather than its design strain.

This alternative method is a deviation from the explicit instructions of the BS 7159 code.