Re: Dear Sir...

From: <knight>
Date: Tue Jan 08 2008 - 11:50:00 EST

Dear Anbarasu,

                        To consider 12.5% of negative tolerance  on pipe wall

thickness,divide t(min) by 0.875(1-.125).This will give you the thickness required.Select the next higher thickness available in ASME B36.19. so, t(min) = 0.0479 inch
t(req) =0.0479/0.875 =0.05474 inch
select the next available thickness.

elie altawil <eliealtawil@yahoo.com> wrote:                               The

right answer to your question is to get a copy of "Pipeline Rules of Thumb" or Gas Processors Suppliers Association Handbook "GPSA" gpsa.gasprocessors.com and the type of pipeline sizing you wish to learn; wall thickness, optimal diameter, fluid velocity, pressure drop, etc.

    Good Luck.

  Elie AlTawil, Sr. Piping Engineer, PE
    Consulting Engineer
    Denver, Colorado

  anbu arasan <anbu_mass@yahoo.co.in> wrote:

            Dear sir...
  Im S.Anbarasan From Chennai(India)...
  Working as a piping Engineer...Sir can you send the std procedure of   pipe sizing Calculation...

  Regards ...
  S.Anbarasan

  elie altawil <eliealtawil@yahoo.com> wrote:   I came up with 0.048", however, you must obtain a copy of SS A-358 TP 321, if mill toterance applies to this materials, it should be added to "t".   t=tm+c+mill tolerance.

  sabirap <sabirap@yahoo.com> wrote:

  Hi Gents…is this calculation correct.

  PIPE WALL THICKNESS CACULATION   Code - ASME B 31.3

  Pipe Material - SS A-358 TP 321 CPI Welded

  Internal Design Pressure P 5.5 barg – 80 psig

  Temperature - 150 0 C – 302 F

  Allowable Stress S - 20000 psig

  Coefficient (Factor) Y - 0.4

  Quality Factor (Joint Efficiency) E - 1

  OD of Pipe D - 24''

  Corrosion Allowance c - 0

  t = PD / 2 (SE + PY)

  80 * 24 / 2[(20000 * 1) + (80 * 0.4)]

  1920 / 40064 = 0.0479 inch

  tm = t + c = 0.0479 + 0 = 0.0479 inch …is this calculation correct.

  I tried to search the Allowable Stress – S, for CS A-672 GR 60 Class   22 or 32, Longitudinally Welded, SAW. I couldn't find it in ASME   B31.3. Anybody can advice me on this…..?

  Thank you,

  Regards,

  Sabir

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[Non-text portions of this message have been removed] Received on Tue Jan 08 11:50:00 2008