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RE: Pipe Analysis

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    You might look for a materials engineer.  Beyond your melting point question, the temperature change only matters if the pipe is restrained (I think).  The pipe will expand according to the thermal coefficient, you can find that number in the back of the AISC manual.  If you restrain it, you get a force which will likely pull the rest of the building over.  If its free to move, it just moves.
    No clue what R211 is, good luck.
Jake Watson
-----Original Message-----
From: MBREngineering(--nospam--at) [mailto:MBREngineering(--nospam--at)]
Sent: Thursday, October 09, 2003 4:56 PM
To: seaint(--nospam--at)
Subject: Pipe Analysis

This might be a little off subject but it deals with stress analysis on pipes, maybe I should go into the ME email group, but let me try anyways.
I am currently working on a pipe that requires a thermal expansion analysis.  The pipe is an exhuast pipe for  a generator.  The material of the pipe consist of low carbon steel.
First Question:
Specs call for a differential temperature of 50F to 1500F.  My comment was that the pipe will melt at 1500F.  Typically I am use to seeing a max temp of 1100F for carbon steel.  I have notified the spec writers and informed them of the concern I have.  Any comments on the max temp of carbon steel?
2nd Question:
We have typically designed pipes under the ANSI B31.1 code but the specs call for ANSI R211.  Is anyone familiar with this R211 code.  I can't seem to find it anywhere.
Thanks for any help that you guys might be willing to give.