Re: Horizontal Dummy Leg Question

From: <Gordon.Reddek@Alcan.com>
Date: Thu Apr 15 2004 - 21:26:00 EDT

Paul,

I can not recall seeing that particular detail however it would not worry me to use it. I don't think the stresses generated are likely to be greater than those on a dummy leg welded to a 90 degree elbow. I expect you are concerned about the stresses generated at the joint between the elbow and the leg. The bending moment is spread over a much larger area at the contract point in this case compared to the 90 degree elbow case so I would expect the stresses to be less.

Gordon Reddek

"Paul Bowers" <pbowers@pipingdesign.com> 16/04/2004 09:50 AM
Please respond to PipingDesign

         To:     <PipingDesign@yahoogroups.com>
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         Subject:        [PipingDesign] Horizontal Dummy Leg Question

Has anyone ever seen a horizontal dummy leg used on a 45 degree elbow?

Here's a quick sketch:

http://www.pipingdesign.com/drawings/dummy.jpg

It is assumed that the non-penetrating weld between the DL and the elbow would overlap, although the sketch doesn't show this.

Paul

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[Non-text portions of this message have been removed] Received on Thu Apr 15 21:26:00 2004