low pressure gas flow 1

[pardal]

Here in my country the gas piping for low pressure is handled by the POOLE formula , for natural gas up to 200 mm water column.

The formula is as follow
D= ( F^2 * 2 * S* L / H )^1/5
where
D= DIAMETER [CM]
F= FLOW [M3/HOUR]
S= SPECIFIC WEIGHT [0.65 FOR NATURAL GAS]
L= LENGTH [M]
H= ALLOWED PRESSURE DROP IN MM WATER COLUMN.

I did a search for some background on this formula , with no results.

Could you give me some reference to it?

Thanks in advance






Pardal

 

[TD2K]

Pardal, no luck finding anything in my reference books but wanted to say hi to you, haven't seen you around for a while.

 

[CRG]

I have a gas pipe sizing program that references its formulas are from CSA B1.49.1-00. The solutions from the program mirror the IFGC tables. Perhaps it includes your referenced formula. I do not have the CSA standard.

 

[25362]

Pardal, I found an old (1851!) formula by a Dr Pole, not Poole, in british units, which is one of the first flow equations in the natural gas industry that might correspond to your formula, when making the appropriate conversion of units, as follows:

F = 1350 D[sup]2.5[/sup] ([Δ]P/L.S)[sup]0.5[/sup]

D, pipe diameter, inches
F, std cfm
L, pipe length, yards
S, gas specific gravity, dimensionless
[Δ]P , inches water

with an equivalent friction factor f= 0.0291

I've not tried to adjust to metric units. However, I hope this is what Pardal was after.

 

[25362]

Correction . F is in standard CFH. I have made a simple check and both formulas gave equal results.

The website:

http://www.psig.org/papers/2001/0112.pdf

 

[TD2K]

25362, I hope that 1851 paper wasn't from your personal library ;-)

 

[pardal]

TD2K.

Maybe the 25362's paper is not at his personal library , but I have a Phisic Book whose author is A GANOT published in PARIS and MADRID in 1972 , with pictures, not photo ,of the aparatus presented at the 1867 UNIVERSAL EXPOSITION OR TRADE OF PARIS .
If I'm not wrong this was when the EIFFEL tower was set.

This book was the one used by our pre pre engineering students in my country , Argentina by that time.

About the formula I will check it too


Pardal

 

[pardal]

PARIS and MADRID in 1972 ,

it is 1872

Pardal

 

[quark]

spooky!!!(if I got TD2K right and also Guinness Book has a much smaller record on human age)

This is an excellent piece of information by 25362 as usual.

 

[MortenA]

pardal the formula that you have referred to look somewhat similar to other gas flow dP formula e.g. the one found in API 14E. I do however miss the friction factor, Z and temp. If your formula however is limited to use for specific systems (your own national gas grid) and maybe include som "factor" not included in your post then this might be an explanation?

Best regards

Morten

 

[pardal]

MortenA:

Yes , we only use steel pipe , new , so the friction factor could be asumed , and the temperature is the normal on a house or building.



Pardal