Applies To
	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i
	Environment:	N/A
	Area:
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Mar. 2015 09.06.01.10

Problem:

Fittings of type B according to PN-EN 10253-2 have diversified wall thickness in opposite to type A. If so, what would be the difference in modeling those fittings for hoop stress category according to PN-EN 13480 in Autopipe?

Answer:

From what our understanding, Type B fittings as per prEN 10253-2 may have fitting body wall thickness which is slightly higher than that of the connecting pipes. This would mean that there will be a certain tapering of the wall thickness that would occur across the fitting. AutoPIPE cannot model a tapered wall thickness for a component. So there can be the following options in this case:

1. Use the connecting pipe wall thickness for the component and to account for the additional weight of the component insert distributed load
2. Use the thicker fitting wall thickness for the fittings by defining a different Pipe ID
3. The analysis results (as well as stress results) may vary depending on which wall thickness is being used for the components, so it may be a good idea to analyze the system for both of these conditions so that the most conservative solution could be reached

See Also

Bentley AutoPIPE

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

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