RE: Thick and High Pressure Pipe

From: <Christopher>
Date: Wed Jun 20 2001 - 10:19:00 EDT

>This now leads to the question when should one use the b31.1 or b31.3 ( as
>oppose to what's the difference between b31.1 and b31.3 or between Div 1
>and 2 - is Div.3 out?)

In general, you use the original design code for the system. If nothing in the original Code applies you are pretty much on your own. No code provides rules for every detail and the intent in such cases is to provide details which will provide the same design margins as used for the original code.

That intent means several things:
First don't mix Code rules. Don't use Div 2 in Div 1 construction, for example.
Second, you have to understand the original code fully to understand the original design margins.
Third, you'll probably have to do some careful engineering design and analysis to make sure your new detail does in fact have the same margins as the original.

Christopher Wright P.E. |"They couldn't hit an elephant from <a href="/group/PipingDesign/post?postID=T9FO7LBBxuJuE_3dwfULMtwokc3KiHr_vEqgs4Y6gLWdu2HaDx9XIL738RoINTxKGwQxXUOwW6S5QnOQzQ">chrisw@skypoint.com</a> | this distance" (last words of Gen.

___________________________| John Sedgwick, Spotsylvania 1864)

<a href="http://www.skypoint.com/~chrisw">http://www.skypoint.com/~chrisw</a> Received on Wed Jun 20 10:19:00 2001