(no subject)

From: <Geoff>
Date: Mon Sep 05 2005 - 17:05:00 EDT

Padmaja,

Suggest you also need to consider the "foloow up" effect. Any thermal strain will not be equally distributed in a pipeline with a low modulus such as PE in a warm climate or higher temperature service. the expansion will go to the weakest part of the pipe and it will buckle.

Another problem is local buckling on supports as the wall weakens at higher temperatures. Thus the pipe will hug the support and thus not slide as you want it too to relieve stresses.

PE is not a good product to consider using with expansion loops. Suggest you consider something else. Also read the websites I last posted, investigate Borealis and Driscopipe. If you learn everything on these sites we wont hear back from you for a month.

Padmaja.Maurya@ril.com wrote:

Hello sirs,

      I  am new in the piping design field, so I have limited experience and
      for PE pipe I am presently doing feasibility study, some points may be
      incorrect  or illogical.  I request experienced persons to correct me,
      if I m wrong.

      For expansion loops :

      Expansion co-efficient for PE 100 is 12 to 17 times higher than carbon
      steel  (referred  from one vendor's website). For using PE pipes in AG
      the  existing  expansion  loops  structure  may not be adequate for PE
      pipe. (No of loops required will be more.)

      Thanking you,

      Padmaja.

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

---

PipingOffice - Excel Spreadsheets for Piping Calculations http://www.pipingoffice.us/

---

Main site: http://www.pipingdesign.com

SPONSORED LINKS
Online mechanical engineering degree Process piping Mechanical engineering Mechanical engineering class Mechanical engineering college Mechanical engineering degree

---

YAHOO! GROUPS LINKS      Visit your group "PipingDesign" on the web.

     To unsubscribe from this group, send an email to:   PipingDesign-unsubscribe@yahoogroups.com

     Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

---

Design Detail and Development (a division of Blenray Pty Ltd)

Mail Address PO Box 1351 Castle Hill NSW 1765 Australia Tel Mob 0402 35 2313 Office 02 8850 2313 AH 02 8850 2324
We specialise in pipe network and waterhammer analysis, pipe stress analysis, the design of buried pipelines and thermoplastic pipe systems.

[Non-text portions of this message have been removed]
Received on Mon Sep 05 17:05:00 2005