Re: pIPING THICKNESS CALCULATOR

Geoff
The simple answer is the B31 Code itself and the way the query was posted - note reference to the use of "calculator".

Then Consider b31.3 para 304 equation 3(a) - no mention of "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." as you have stated.

Heck if it its more, then you need more than a calculator to work out the numbers.

Tomcruz

• In PipingDesign@yahoogroups.com, Geoff Stone DD&D Australia <blenrayaust@y...> wrote:
  >
  > 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@y...> 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.
  > >
  >
  >
  >
  >
  >
  >
  > =========================================
  > PipingOffice - Excel Spreadsheets for Piping Calculations
  > <a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
  > =========================================
  > Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
  >
  >
  >
  >
  > ---------------------------------
  > YAHOO! GROUPS LINKS
  >
  >
  > Visit your group "PipingDesign" on the web.
  >
  > To unsubscribe from this group, send an email to:
  > <a href="/group/PipingDesign/post?postID=GnMH8Pzomh65t06uO32Vjb1HT-V8g1Lafu4bKhAtBGvDmw6CQa0Io0muBXn15l_tOKGFweCB9YbzpsxkWs5vJBzQ26kDILKdgHE6wPqN4w">PipingDesign-unsubscribe@yahoogroups.com</a>
  >
  > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
  Service.
  >
  >
  > ---------------------------------
  >
  >
  >
  >
  >
  >
  >
  > Design Detail and Development (a division of Blenray Pty Ltd)
  >
  > Mail Address PO Box 1351 Castle Hill NSW 1765 Australia Tel Mob
  0402 35 2313 Office 02 8850 2313 AH 02 8850 2324
  > We specialise in pipe network and waterhammer analysis, pipe
  stress analysis, the design of buried pipelines and thermoplastic pipe systems.
  >
  >
  >
  >
  >
  >
  >
  >
  >
  >
  >
  >
  >
  >
  > [Non-text portions of this message have been removed]
  >