RE: Re: Very High Pressure Piping - Limitations of Codes and Software

From: <Ben>
Date: Tue May 11 2004 - 15:57:00 EDT

Your situation can be applied by portions of ASME B31.3, Chapter IX, High Pressure Piping. It has special formulas for treating internal pressure and fatigue analysis of heavy wall piping components.

For the size and conditions you gave, calculations reveal an allowable pressure not even close to 40,000 psig, assuming 1 1/4Cr- 1/2Mo material.

Ben

-----Original Message-----
From: ceacs [mailto:ceacs@yahoo.com.br]
Sent: Tuesday, May 11, 2004 9:35 AM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Re: Very High Pressure Piping - Limitations of Codes and Software

Hi all and thanks for the great replies,

    I'm supposed to verify stiffness, strength and stability of a existent facility on a local petrochemical industry.

    The design pressure is 40000 psi (2800 bar) and the design temperature is 374°F (190°C).

    According to the process engineer this pipeline connects two reactors and a Heat Exchanger that perform mechanicly the union of the product molecules.

Regards,

    Carlos Eduardo

• In PipingDesign@yahoogroups.com, "ceacs" <ceacs@y...> wrote:
  > Hi all,
  >
  > I've recently been asked to performe a flexibility analysis as
  > follows:
  >
  > Pipe OD: 4"
  > Pipe ID: 1.1/2"
  > Pressure: 40.000 PSI
  > Material: High Alloy Steel
  >
  > My general thoughts up to now:
  > * I believe ASME B31.X codes won't work up to this pressure (but
  > i'm not sure).
  > * I'm very unconfortable with the idea of using Caesar II to
  > perform this calculation.
  > * I'm probably end up using Algor.
  > * How about plastic deformations? Creep? Geez...
  >
  > Any thoughts from you guys?
  

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PipingOffice - Excel Spreadsheets for Piping Calculations http://www.pipingoffice.us/

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