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

Problem:

why is the code allowable for ASME B31.4 - 2012 is different from B31.4-2009 for Stresses Due to Sustained Loads?

Solution:

According to AutoPIPE help section: Reference Information> Code Compliance Calculations> ASME 31.4 2012>

A. Stresses Due to Sustained Loads allowable:

"AutoPIPE reports Sl, and the allowable stress (0.75×Sy), where Sy is the specified minimum yield strength."

B. According to ASME B31.4 code:

Stress Values for steel pipe during operation shall not exceed the allowable values of table 403.3.1-1 as calculated by this chapter.