Re: Re: pIPING THICKNESS CALCULATOR

From: <Geoff>
Date: Mon Dec 19 2005 - 23:40:00 EST

Tom,

   How do you know if it is needed or not? The Code requires that you determine it. It doesnt say "if you are having a bad hair day just calculate the wall thickness and everything will be OK". Indeed unless you calculate it or test for it your knowledge is meagre and unsatisfactory. Check out Lord Kelvins Quote below.

   Geoff

       “In physical science the first essential step in the direction of learning any subject is to find principles of numerical reckoning and practicable methods for measuring some quality connected with it. I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science, whatever the matter may be."

   Lord Kelvin [PLA, 1883-05-03]”

tomcruz55 <tomcruz55@yahoo.com> wrote:

   Geoff,
You don't really need all this stuff if all you need is the number for the pipe wall thickness. OK let us say you want a stress analysis on a pipe - plus you thrown in some other goodies. If you don't have the right software, the analysis is still possible (to a certain degree) using graphs/charts, tables and some elementary strength equation granting you have a working knowledge of the B31 Code and granting you are aware of the process environment – and as long as youre willing to accept a certain margin of error. How far off? Well it depends but normally the result is pretty much within acceptable range.

tomcruz55

• In PipingDesign@yahoogroups.com, Geoff Stone DD&D Australia <blenrayaust@y...> wrote:
  >
  > You may also want to consider fatigue analysis, surge analysis to
  determine the actual design pressure that you have selected a pipe for, the bending stresses based on how you will support the pipe, earthquake, wind, vibration, impact loads, concentrated loads, local buckling, corrosion, how the stuff is going to be joined together etc etc. Hey, you might want to become a piping engineer.
  >
  

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[Non-text portions of this message have been removed] Received on Mon Dec 19 23:40:00 2005