04. How to model a Stub End, Swivel, or Misalignment Flange in AutoPIPE ?

Mike Dattilio — Mon, 18 Apr 2016 16:37:50 GMT

Current Revision posted to AutoPIPE Wiki by Mike Dattilio on 4/18/2016 4:37:50 PM


	Applies To

	Product(s):	AutoPIPE
	Version(s):	2004, XM, V8i, CONNECT;
	Environment:	N/A
	Area:	Modeling
	Subarea:
	Original Author:	Bentley Technical Support Group
	Date Logged & Current Version	Apr. 2016 10.01.00.05

Problem:

How to model a Stub End, Swivel, or Misalignment Flange in AutoPIPE ?

Solution:

The swivel flange is used with medium service pressures at points where the bolt holes in the mounting flanges are not precisely aligned. The swivel flange simplifies fitting between 2 fixed points.

For stress analysis purpose, the program needs to know the weight and SIF associated with a flange. Most ASME piping codes do not have established SIF values for these types of flanges. Whilst ASME 16.5 and 16.47 codes are applicable for weld neck flanges, they are not applicable to swivel ring flanges beyond the bolt pattern and bolt sizes. ASME offer alternative rules that consider swivel ring flanges as non-standard, or loose type, flanges.

Use the following modeling approach for these types of flanges:

Select the node point where the flange is to be located, press Insert> Flange>, on the flange dialog screen enter:

Flange type = NS
Pressure Rating = NS
Weight = Enter weight (see from vendor literature)
Joint End Type: User Defined
Joint SIF: Enter SIF value (contact flange manufacture for value to be used.)

Note: One could argue to set Joint end type = "Lap joint" in order to automatically calculate the SIF. However, since these types of joints are not covered by the applicable piping code, you will need to use engineering judgement or contact the manufacture. Bentley TSG cannot provide a definitive values.

External Links

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

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the "Comments" area below. THANK YOU!

Tags: Swivel, stub, AutoPIPE, Modeling, Flange

04. How to model a Stub End, Swivel, or Misalignment Flange in AutoPIPE ?

04. How to model a Stub End, Swivel, or Misalignment Flange in AutoPIPE ?

Problem:

Solution:

See Also

External Links

Comments or Corrections?