Re: Natural Gas piping design

From: <alwyn>
Date: Fri May 02 2003 - 11:35:00 EDT

You absolutely have to have an engineer do these for you. The codes require this and the laws of every country enforce the codes.

It is MUCH TOO DANGEROUS to be playing around with these when you clearly dont understand the issues.

People will definitely get injured or worse killed if you try to do this out of your depth.

PLease take what I am telling you here seriously. I hope everybody else will also pay attention. This is NOT a TRIVIAL matter.

This is how serious failures and accidents occur.

regards
Al

• Original Message ----- From: sudir To: PipingDesign yahoo group Sent: Friday, May 02, 2003 8:01 AM Subject: [PipingDesign] Natural Gas piping design

   Hi friends,
   I am a new member in this group.
   I request everybody to accept me as a member of this group.    I am having some probs.

1. How to calculate the following things for given volumetric flow of gas:
   1. Pipe dia.
   2. Pipe thickness/ pipe schedule no.
   3. Pressure drop/kilometer of pipe length.
2. For most economical transmission of gas through pipe at what pressure the gas is to be transmitted? On what factors it depends, please elucidate.
3. What is the maximum gas velocity allowed in the pipe?
4. What are limiting factors for deciding the above things?
5. How to calculate the compressor power required for boosting the pressure of the gas?
6. Due to flow of gas through pipe there may be increase in temperature of the gas; how to calculate the temperature rise due to friction?

   Does it have any safety related aspects?    If yes then how to counteract this?

   7. What is the value of the natural gas viscosity?    8. I have tried two formulas

1. Waymouth &
2. Fanning's formula Even though both are applicable for the gas flow through pipe but the pressure drop calculated by these formulas gives different values. Please clarify.

   For e.g.     Volume flow  = 40 mmscmd
     Inlet pressure  =  10 bar
     Inlet temperature =  30 oC
     Pipe length  =  500 km

   Your answers are highly appreciated

   Regards
   Sudhir

   [Non-text portions of this message have been removed]

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[Non-text portions of this message have been removed] Received on Fri May 02 11:35:00 2003