Re: Natural Gas piping design

Dear Sudhir,

Research CODE below.

API-14E - Design and Installation of Offshore Production Platform Piping Systems.
API-14C - Recommended Pratice for Analisis, Design, Installation, and testing of Basic Suface Safity Systems for Offshore Production Plataforms.
ANSI 31.8 - Gas Tramsmission and Distribution Piping Systems. CNGA - California Natural Gasoline Association. Magazine ChemicalEngineering, Dec. 23,1974.

Goood Lock.

Custodio

> 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 volumetri
c 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 w
hat 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 boosti
ng 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 fricti
on?
>
> 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
>
> a. Waymouth &
> b. Fanning's formula
> Even though both are applicable for the gas flow through pip
e but the
> pressure drop calculated by these formulas gives different v
alues.
> 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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