Re: DESIGN

From: <Christopher>
Date: Tue Mar 18 2003 - 10:30:00 EST

>In looking at the ASME section 1 formula
>for wall thickness, the two key unknowns are the material and the
>pressure.

Cutting to the chase--the working pressure (and temperature) is usually set by the process involved. Material choices are determined by the economics and the media being conveyed. Much of the geometry comes from the system architecture--tank placement, supply arrival point, and destination for example. Usually the kinds of equipment needed is settled on beforehand when the process is designed and the piping and ancillary devices placed as required.

You don't 'rate' a pipe by testing it. You use design codes to determine what pressure thepipe can safely cary based on service life and pressure and temperature environment

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=1L3eagYwTlSx9IyWCYnxF_QLCCIJIYPkcNBmJDW5R7lWGZsv_kDqpAjVn3CoQ3gRgWTQ6_U5qpIcUpu8bZQ">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 Tue Mar 18 10:30:00 2003