Pipe Line Sizing by Velocity for Gases | Simple Science

This video explains sizing of pipe lines OR tubes used in process industries by calculating velocity of gases.
★ Flow velocity calculation for Gases
★ Recommended Gas velocity for pipe selection
★ Factors to be considered during pipe sizing

[@manucenthilnathan3241]

Great video. Have been searching for this! Thanks

[@Kayandlaylay564]

battling with how you got 0.01184 for 1/2'' NPS Schedule 160 and 0.0207 for 1''

[@nawazmotiwala1989dsg]

What is 0.1 in formula, Also What is 273.15 in denominator?

[@harshchande687]

For 3/4 NPS SCH160 , Gas velocity is 24 m/s. Therefore pipe size is also recommended.

[@zayedaljabri5454]

What is the inner diameter ?

[@Hardheadskill]

@@zayedaljabri5454 0.0155

[@user-cv8bz9nf5w]

Gas velocity ~ 16, 3/4" is also recommended for this application

[@praveenmanogaran5677]

i got this value too, i got 15.47 m/s

[@muhammadshehzad5990]

Kindly make more videos

[@mohsenk5985]

Please keep making these videos

[@dialgang7872]

may i know how to get 120 Nm3/hr in velocity of gas ? or it is assumption ?

[@user-ow9de1vg8g]

Hello, great video but why use the minimum operating pressure?

[@livingmax383]

Very informative.. Thanks

[@harithgodz]

Hello sir. Where did you get the recommended gas velocity? does this apply to compressed air too?

[@abhijeetsingh7824]

Thank you

[@Mr.DX_Official]

its a saver thanks

[@PremKumar-py7hm]

How to calculate velocity of a power plant chimny by stack kit

[@fassaaug03]

Why does "in general" the gas velocity should be under 40 m/s?
Laminar/turbulent flow?
It is very far from the speed of sound that might cause any sort of undesirable effects

[@bipl8989]

Noise and pipe erosion. Pressure drop is also usually too much. Actually for a more optimum economy for long distances, 20 to 30m/s is even better.

[@AliAlias]

Thanks very much.
What about natural gas with mixture component c1, c2, c4, c5, h2s..@ high pressure for example 15~24 bar

[@SimpleScience]

You can use same method

[@abhisheksrini9807]

Recommended velocity less than 25 m/s? How the value is taken?

[@ShrinathSasane-nd6dq]

For 3/4" line size Velocity = 23.09m/s

[@kaustubhdikshit439]

What about gas compressible factor

[@LeeeJim]

Thank you so much. But where does 273.15 and 0.1 came from?

[@LeeeJim]

I just found 273.15 is absolute zero. What about 0.1 value sir?

[@benibensa]

@@LeeeJim it is related to the pressure. The original formula for normal volume flow rate and actual volume flow rate is (normal means at 273.15 kelvin and approx 100 000 pascal):
Q = Q0 * (Z * T * p0) / ( Z0 * T0 * p)
Z and Z: are compressibility and normal compressibility, not considered in this video
The 0.1 in the formula (in the video) is due to p being in MPa and to p0 not being explicitly included in the formula.

[@joergdyckerhoff471]

@@LeeeJim 1 atm. From combined gas law.

[@gitapandya2371]

What mean of cubeak gas line

[@yuvarajprasanna5775]

273.15 ? why the value came

[@adityaram7493]

temperature is in kelvin unit

[@jig577]

please what is the name of the actual flow rate equation

[@joergdyckerhoff471]

Combined gas law

[@Imsama123]

may i know which reference these formulas came from?

[@Imsama123]

what is 3600 and 0.1 in the formula?

[@adityaram7493]

@@Imsama123 hour unit was converted into seconds = 1 hour = 3600 seconds

[@benibensa]

@@Imsama123 0.1 is related to the pressure. The original formula for normal volume flow rate and actual volume flow rate is (normal means at 273.15 kelvin and approx 100 000 pascal):
Q = Q0 * (Z * T * p0) / ( Z0 * T0 * p)
Z and Z: are compressibility and normal compressibility, not considered in this video
The 0.1 in the formula (in the video) is due to p being in MPa and to p0 not being explicitly included in the formula.

[@Hello-qv4xm]

How to calculate inner dia

[@SimpleScience]

You can Google it.. Or use pipe data app from playstore

[@vijaychauvhan6143]

23.13 m/s

[@vijaylondhe05]

Gas velocity =23.13 m/s