RE: EXPANSION STRESS RANGE

From: <trajyagu@ltcis.ltindia.com>
Date: Mon Sep 16 2002 - 23:20:00 EDT

Cold Allowable Stress (Sc) = 2 / 3 x Sy(cold), Hence, Syield(cold) = 3 / 2 x Sc
Similarly, Syield(Hot) = 3 / 2 x Sh

Allowable stress = Syield(cold) + Syield(Hot) = 1.5 ( Sc + Sh ) Code seems to have divided above value with Factor of safety to arrive at 1.25 value instead of 1.5 in above equation.

Tushar.

<a href="/group/PipingDesign/post?postID=oBy_pJLOrdOvvG5SlLd5UfbdwDa1drTyJVmdrRWROae67w3yjjO54EmQ273W9fvxn-9k8UcEe-MUXQ">Sachin_Bapat@ril.com</a> on 09/17/2002 09:26:28 AM

Please respond to <a href="/group/PipingDesign/post?postID=Tjo7L6UTWemQzwme6ARevtBA1-KVHfxM-sTyasc1SqR5xAJhDZgNSnUvXQ27_DeeEIywVQ_728kFuWMIQOQTHNdoq1pQJhY">PipingDesign@yahoogroups.com</a>

To: <a href="/group/PipingDesign/post?postID=Tjo7L6UTWemQzwme6ARevtBA1-KVHfxM-sTyasc1SqR5xAJhDZgNSnUvXQ27_DeeEIywVQ_728kFuWMIQOQTHNdoq1pQJhY">PipingDesign@yahoogroups.com</a> cc: (bcc: TUSHAR K RAJYAGURU/L&T-CHIYODA) Subject: RE: [PipingDesign] EXPANSION STRESS RANGE

Piping code B31.3 gives value of expansion stress range as follows

                       Sa=f((1.25(Sc +Sh) - Sl)

where Sc ,Sh, Sl,f have their usal meaning as defined in code.   My query is
How the code has decided upon this value of 1.25 ? What is the physical significance of this value?
Views are invited from team members on the subject matter. Regards
Sachin Bapat

Texas Flange - a good source for information on industrial flanges, all they ask is for referrals for designs they help with. 877-610-8924.
www.texasflange.com

---

unsubscribe: <a href="/group/PipingDesign/post?postID=WOtMEshjnyHRQw660ybi0m2oEKkj-NFKO2Ecs3sN5sISj0xs47lngUgp38rmUb5QROzAILfl5mx4vkkRcDcFLC0WqMVu-3Xybr2Axv8D7g">PipingDesign-unsubscribe@yahoogroups.com</a>

Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Mon Sep 16 23:20:00 2002