Re: [PipingDesign] Sloped headers

From: <John>
Date: Tue Jan 15 2008 - 08:30:00 EST

Yes this is one of the concerns... MW Kellogg company in their 2cd book on design was quite specific requiring that trunnions/ staunchions be used on high temperature lines...

Best Regards,
John C. Luf
Cleveland Ohio U.S.A when I'm not in Austria

Member B31.3, Piping Engineer - Stress Analysis, Pipe Supports, Component Design, and Surge Analysis... according to my daughters master of unimportant trivia

http://suntzuquote.blogspot.com/

             John,

If the difference in thermal growths along the pipe, at the pipe and at the

shoe bottom, is appreciable. I suppose the shoe would literally arch away

from the pipe. Is that the high strain?

Sajit

so while where its attached to the pipe it may be at 1100F at the bottom of

the saddle or shoe it may only be @ 300 - 400 F. This differential may

cause extremely high strains to form at the weld line.

Save a tree...please don't print this e-mail unless you really need to.

<!--

#ygrp-mkp{

border:1px solid #d8d8d8;font-family:Arial;margin:14px 0px;padding:0px 14px;}
#ygrp-mkp hr{

border:1px solid #d8d8d8;}
#ygrp-mkp #hd{

color:#628c2a;font-size:85%;font-weight:bold;line-height:122%;margin:10px 0px;}
#ygrp-mkp #ads{

margin-bottom:10px;}
#ygrp-mkp .ad{

padding:0 0;}
#ygrp-mkp .ad a{

color:#0000ff;text-decoration:none;}
-->

<!--

#ygrp-sponsor #ygrp-lc{

font-family:Arial;}
#ygrp-sponsor #ygrp-lc #hd{

margin:10px 0px;font-weight:bold;font-size:78%;line-height:122%;}
#ygrp-sponsor #ygrp-lc .ad{

margin-bottom:10px;padding:0 0;}
-->

<!--

#ygrp-mlmsg {font-size:13px;font-family:arial, helvetica, clean, sans-serif;}
#ygrp-mlmsg table {font-size:inherit;font:100%;}
#ygrp-mlmsg select, input, textarea {font:99% arial, helvetica, clean,
sans-serif;}
#ygrp-mlmsg pre, code {font:115% monospace;}
#ygrp-mlmsg * {line-height:1.22em;}
#ygrp-text{

font-family:Georgia;
}
#ygrp-text p{

margin:0 0 1em 0;}
#ygrp-tpmsgs{

font-family:Arial;
clear:both;}
#ygrp-vitnav{

padding-top:10px;font-family:Verdana;font-size:77%;margin:0;}
#ygrp-vitnav a{

padding:0 1px;}
#ygrp-actbar{

clear:both;margin:25px 0;white-space:nowrap;color:#666;text-align:right;}
#ygrp-actbar .left{

float:left;white-space:nowrap;}
.bld{font-weight:bold;}
#ygrp-grft{

font-family:Verdana;font-size:77%;padding:15px 0;}
#ygrp-ft{

font-family:verdana;font-size:77%;border-top:1px solid #666; padding:5px 0;
}
#ygrp-mlmsg #logo{

padding-bottom:10px;}

#ygrp-vital{

background-color:#e0ecee;margin-bottom:20px;padding:2px 0 8px 8px;}
#ygrp-vital #vithd{

font-size:77%;font-family:Verdana;font-weight:bold;color:#333;text-transform:upp\ ercase;}
#ygrp-vital ul{

padding:0;margin:2px 0;}
#ygrp-vital ul li{

list-style-type:none;clear:both;border:1px solid #e0ecee; }
#ygrp-vital ul li .ct{

font-weight:bold;color:#ff7900;float:right;width:2em;text-align:right;padding-ri\ ght:.5em;}
#ygrp-vital ul li .cat{

font-weight:bold;}
#ygrp-vital a{

text-decoration:none;}

#ygrp-vital a:hover{

text-decoration:underline;}

#ygrp-sponsor #hd{

color:#999;font-size:77%;}
#ygrp-sponsor #ov{

padding:6px 13px;background-color:#e0ecee;margin-bottom:20px;}
#ygrp-sponsor #ov ul{

padding:0 0 0 8px;margin:0;}
#ygrp-sponsor #ov li{

list-style-type:square;padding:6px 0;font-size:77%;}
#ygrp-sponsor #ov li a{

text-decoration:none;font-size:130%;}
#ygrp-sponsor #nc{

background-color:#eee;margin-bottom:20px;padding:0 8px;}
#ygrp-sponsor .ad{

padding:8px 0;}
#ygrp-sponsor .ad #hd1{

font-family:Arial;font-weight:bold;color:#628c2a;font-size:100%;line-height:122%\ ;}
#ygrp-sponsor .ad a{

text-decoration:none;}
#ygrp-sponsor .ad a:hover{

text-decoration:underline;}
#ygrp-sponsor .ad p{

margin:0;}
o{font-size:0;}
.MsoNormal{
margin:0 0 0 0;}
#ygrp-text tt{

font-size:120%;}
blockquote{margin:0 0 0 4px;}
.replbq{margin:4;}
-->       

________________________________________________________________________________\


Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

[Non-text portions of this message have been removed] Received on Tue Jan 15 08:30:00 2008

This archive was generated by hypermail 2.1.8 : Tue Mar 09 2010 - 00:21:22 EST