Hi Everyone,
can someone help me out with this question.
I have been given a flow of 2000 cfh = 33.33 cf min
and have been asked if a pipe diament of 2" at the customer service end is sufficient.
I am not in the gas industry., but is there some way to gauge how much gas service a given size can give you?
How much service can a 4" give you?
(the contractor ewants to reduce from 4 to 2")
cool i appreciate any links or helpful way in my learning about how to calculate this!
natural gas pipe diameter and flows
Re: natural gas pipe diameter and flows
What pressure is in gas line?
You can use calculator at:
http://www.pipeflowcalculations.com/naturalgas/
or read some theory on:
http://www.pipeflowcalculations.com/pip ... l-flow.php
- on that page look at last equation for pressure drop - Renouard Equation
You can use calculator at:
http://www.pipeflowcalculations.com/naturalgas/
or read some theory on:
http://www.pipeflowcalculations.com/pip ... l-flow.php
- on that page look at last equation for pressure drop - Renouard Equation
Pipe flow calculations - since 2000
Re: natural gas pipe diameter and flows
HI
not sure what ConEd New York uses for pressure, ive heard that for residential service i should use .5psi
what would commercial pressure be?
this is service for two restaurants ?
not sure what ConEd New York uses for pressure, ive heard that for residential service i should use .5psi
what would commercial pressure be?
this is service for two restaurants ?
Re: natural gas pipe diameter and flows
You must also know the length of pipe to make accurate calculation.
Anyway my assumption is that you will be ok with 2" pipe as velocity is about 7 m/s as in my experience it is velocity that you afford.
To do calculation yourself, try with calculator mentioned earlier.
Here is report that I have from it:
1. volumetric flow rate (q): q = 33 ft3/min
2. mass flow rate (w): w = 43.73246 kg/h
3. length (L): L = 20 m
4. diameter (D): D = 2 in
5. density (ρ): ρ = 0.78 kg/m3
6. temperature (T): T = 288 K
7. volumetric flow rate at the start (q1): q1 = 57.705853 m3/h
8. volumetric flow rate at the end (q2): q2 = 57.85179 m3/h
9. pressure on the pipe start (p1): p1 = 15.054387 psi
10. pressure on the pipe end (p2): p2 = 15.016408 psi
11. pressure drop (p1-p2): p1-p2 = 0.037976634 psi
12. velocity at the start (V1): V1 = 7.908614 m/s
13. velocity at the end (V2): V2 = 7.928615 m/s
Residential pressure is about 25 mbar, but commercial can be 25 mbar, 100 mbar, or more as it depends on consumers. For your consumption of 33 cfm I presume it is 25 mbar, or 15.05 absolute pressure (atmospheric + gauge) as given above
Anyway my assumption is that you will be ok with 2" pipe as velocity is about 7 m/s as in my experience it is velocity that you afford.
To do calculation yourself, try with calculator mentioned earlier.
Here is report that I have from it:
1. volumetric flow rate (q): q = 33 ft3/min
2. mass flow rate (w): w = 43.73246 kg/h
3. length (L): L = 20 m
4. diameter (D): D = 2 in
5. density (ρ): ρ = 0.78 kg/m3
6. temperature (T): T = 288 K
7. volumetric flow rate at the start (q1): q1 = 57.705853 m3/h
8. volumetric flow rate at the end (q2): q2 = 57.85179 m3/h
9. pressure on the pipe start (p1): p1 = 15.054387 psi
10. pressure on the pipe end (p2): p2 = 15.016408 psi
11. pressure drop (p1-p2): p1-p2 = 0.037976634 psi
12. velocity at the start (V1): V1 = 7.908614 m/s
13. velocity at the end (V2): V2 = 7.928615 m/s
Residential pressure is about 25 mbar, but commercial can be 25 mbar, 100 mbar, or more as it depends on consumers. For your consumption of 33 cfm I presume it is 25 mbar, or 15.05 absolute pressure (atmospheric + gauge) as given above
Pipe flow calculations - since 2000