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Thread Tools Search Thread Rate This Thread Display 04-14-2008, 05:45 PM #1 WAT © i

Junior Member pon ates Apr 2008

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6 pipe diameter

I need to calculate pipe diameter for natural gas pipe line as the following details

Flow rate : 37000 m3/h (at 0.00 g)

presure : 7 bar

Gas temperatueer : 20 C

pipe length : 6000 m

pipe type : steel

thanks in avance

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| 05-31-2008, 04:23 PM #3 |

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You need to use PIPESIM 2003 whose link in available on this forum to find the optimum size

It depends how much you need pressure at the end!!! and how is the pipeline layed? buried or non-buried?, how is the

pipeline elevation profile, how much is the ambient temp, etc

If you still have problem, get back to me

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Q3-15-2009, 05:12 PM #4 raf b ® Join Date: Feb 2008 Junior Member Posts: 5

you can use olga 2000 for simulation and you need pvtsim for use the table fluid

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03-21-2009, 11:57 AM #5

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if you are doing according to ASME then refer ansi B31.2 where you can find formula for pipe thickness calculation

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Any way you can get the outer diameter of the pipe from the vendor or you can take the diameter of the nozzle of the

tank or pressure vessel Then you can place your tappings or reducers or any other components according to your

distribution and pressure you require at the end

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Well firstly, Pipe diameter are depends on Flowrate, Velocity, Compressibility, temperature and Pressure Here is the

equation/formula that i ussualy use for pipe sizing calculation But the most important thing is that you have to design the velocity (velocity limitation : below acceptable noise levels, it's about 60 to 80 ft/sec and if the gas contains liquids we have

to refer to API RP 14 E which is the minimum velocity should be limited to about 10 ft/sec)

V=1440* Z*Q*T/(d*d*P)

Where V =velocity ft/sec

Z = compressibility (ussualy 0.94)

Q = Flowrate, million cu ft/hr

T = temperature, R

d = inside diameter of pipe, inch

P = operating pressure, Psia

Good lụck ^_^

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Well firstly, Pipe diameter are depends on Flowrate, Velocity, Compressibility, temperature and Pressure Here is the

equation/formula that i ussualy use for pipe sizing calculation But the most important thing is that you have to design the velocity (velocity limitation : below acceptable noise levels, it's about 60 to 80 ft/sec and if the gas contains liquids we have

to refer to API RP 14 E which is the minimum velocity should be limited to about 10 ft/sec)

V= 1440 *Z*Q*T/(d*d*P)

Where V =velocity ft/sec

Z = compressibility (ussualy 0.94)

Q = Flowrate, million cu ft/hr

T = temperature, R

d = inside diameter of pipe, inch

P = operating pressure, Psia

Good luck *_“”

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Guillermo Culebro Nieves © Join Date: Jun 2008 Junior Member Posts: 13

@@ Originally Posted by WAT r3

I need to calculate pipe diameter for natural gas pipe line as the following details Flow rate : 37000 m3/h (at 0.00 g)

presure : 7 bar Gas temperatueer : 20 C pipe length : 6000 m pipe type : steel

thanks in avance

Usa la eucación de Wymouth que es:qsc=433.9*[tsc/psc ]*[[p1^2-p2^2]*d^5.333/[s*L*Tm*Zm]]^0.5=435.9* (536.67/14.7)*((101.55^2-14.7^2)*d^5.,333*0.9/(0.9*3.73*527*%0.94))^0.5*Eficiencia de tubería

S=gravedad espedifica densidad/densidad del aire

Zm0O factor de compresibilidd 0.94 típico, Tm temperatura promedio °R de la tubería,tsc temperatura a

condiciones estandar °R, psc psia, presik#243;n a condiciones estandard, L longitud de tubería millas,p1

presik#243;n de entrada, p2 presion de salida de la tubería

d diametro interno de tubería in, d= 12.8 in, debes encontrarlos datos correctos, como gravedad espec&#237 ; fica,

t de entrada y salida, presion de entrada y salida, puedes usar Pandhandle, Ao B y te dará el diámetro interior

de la tubería

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Guillermo Culebro Nieves ° Join Date: Jun 2008 Junior Member Posts: 13

@@ Originally Posted by Guillermo Culebro Nieves —

14.7^2)*d^5.333*0.9/(0.9* 3.73*527*0.94))^0.5* Eficiencia de tubería

S=gravedad espedifica densidad/densidad del aire Zm0 factor de compresibilidd 0.94 tí pico, Tm temperatura promedio °R de la tubería,tsc temperatura a condiciones estandar °R, psc

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psia, presi& #243;n a condiciones estandard, L longitud de tubería millas,p1 presión de entrada, p2 presion de salida de la tubería

d diametro interno de tubería in, d= 12.8 in, debes encontrarlos datos correctos, como gravedad espec& #237;fica, t de entrada y salida, presion de entrada y salida, puedes usar Pandhandle, Ao By te dará el diámetro interior de la tubería

qsc

ft*3/dia, ese dato es 31359427(37000m%3/h)

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