Re: Banching from pipes

From: <conor.walshe@alcan.com>
Date: Tue May 04 2004 - 18:54:00 EDT

I never came across stub-ins and stub-ons until I moved from Pharmaceutical into the Alumina game (from small pipes to big ones). Stub-ons v tee's. You need to analyse the cost of the tee and labour to install, v the cost of fabrication and welding of the stub-on. I think (but you will need to verify yourself) that for the bigger diameter pipes you will start making allot more cost savings.

Note that stub-ins are not standard B16.9 fitting and will hence require checking for re-inforcement. Also the Stress Intensification factors are far higher for stub-ins/ons. Keep this in mind if the piping system may be highly stressed.

Conor Walshe
Mechanical Design Engineer
Alcan Engineering Australia Pty Limited
A member of the Alcan Group of companies Tel: (07) 3218 3648
Fax: (07) 3236 0155
e-mail: <a href="/group/PipingDesign/post?postID=kh2YcaVEgdOOZmtrsNIp4IdpzRfjiG5zXtb0nk-7NKis9Cm8zmf2S1524gvnmnj2DUEf3Im0aVXfObYsIYo">conor.walshe@alcan.com</a>

"A.R.Mani" <firreza@yahoo.com> 04/05/2004 06:35 PM
Please respond to PipingDesign

         To:     <a href="/group/PipingDesign/post?postID=fqeXY4a_rPalZcSJWVyWeWROy88G-bv1KjAArLfCQ4cdFygWQYCPUjnjyc4S9DvK2BdeeLjBZAjgJ80atZRkkrqRimzpVA">PipingDesign@yahoogroups.com</a>
         cc:
         Subject:        [PipingDesign] Banching from pipes

Hi Everybody

I was wondering of a statement once I read in a Contract ,said that all branch connections shall be made by fittings for all sizes and services. I would like to know about your experiences and good practice regarding this issue.
Is there any refrences or some general guidlines or some sample PMS's available to refer to, regarding this issue ? By a comparison between direct pipe to pipe connection and making use of fittings or self reinforced fittings for taking branch ,it goes without saying that the quality and easiness of the job would be much better in the latter case but regarding cost the former would be cheaper.

Do you have any idea in this issue?

Cheers

A.R.Mani

---

Do you Yahoo!?
Win a $20,000 Career Makeover at Yahoo! HotJobs

[Non-text portions of this message have been removed]

---

PipingOffice - Excel Spreadsheets for Piping Calculations <a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>

---

Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>

Yahoo! Groups Links

[Non-text portions of this message have been removed]
Received on Tue May 04 18:54:00 2004