	Applies To
	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i
	Area:	Results
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Aug. 2015 09.06.02.06

Problem:

What is the reasoning for taking only gravity and thermal expansion bending moments into account for Equiv2 and not pressure? If you have thermal expansion you have pressure as well. You can't just have thermal expansion without pressure. In your competitor's program they are taking bending moments from all cases into account (pressure, gravity and thermal).

Solution:

Pressure cases contain pressure extension/elongation forces and moments, which piping codes do not clearly require to be included in calculations. Longitudinal Pressure Stress component (P*Ap/As) is always included regardless of Pressure case being a part of the combination or not.

Note:

As = Cross sectional area of pipe, in2

Ap = Pressure area of pipe, in2

P = Design internal pressure, psi

04. What is the reasoning for taking only gravity and thermal expansion bending moments into accou

Problem:

Solution:

See Also