I created a semplified autopipe model (completely above ground, without soil) to try to verify formulas that it use to calculate the equivalent stress according to ASME B 31.4.
In correspondence of a node in a fully unrestrained pipe, the calculated equivalent stress is exact the same value of hoop stress;(see below values)
Category
Stress
Allowable
Hoop
229.1
322.68
Sustain
114.69
242.01
Expansion
0
Eq Tensile
403.34
in correspondence of a node in a fully restrained pipe, the calculated stress values are listed below
72.38
207.24
296
I’m not able to understand which equations it has been used.
Can someone help me?
Another question: in the result grid, is reported a column named “pressure”, what means?
Thanks in advanced.
Regards