nat. gas piping size ?

[techtooler]

We have a 1.5" nat gas line that runs 150' to a neck down to 1" for about 20'. Can a 1" line supply the necessary flow rate and pressure to the following appliances:

item manifold pressure req. BTU CF/hr
range 5" WCP 153000 145.7
furnace 3.5" WCP 33000 31.4
furnace 3.5" WCP 33000 31.4
tankless heater 3.5" WCP 85,000 81.0
dryer 3.5 WCP 22,000 21.0

total 326,000 310.5 if all on simultaneously

[admin]

Yes, it should be ok, but it really depends on the pressure that you have on the start of the pipe.

Here is the report that I have for 1.5" pipe with calculator:
http://www.pipeflowcalculations.com/nat ... /index.htm

Compressible natural gas flow calculator CALCULATION REPORT
1. volumetric flow rate (q): q = 5.175 ft3/min
2. mass flow rate (w): w = 6.858045 kg/h
3. length (L): L = 150 ft
4. diameter (D): D = 1.5 in
5. density (ρ): ρ = 0.78 kg/m3
6. temperature (T): T = 288 K
7. volumetric flow rate at the start (q1): q1 = 8.945907 m3/h
8. volumetric flow rate at the end (q2): q2 = 8.95283 m3/h
9. pressure on the pipe start (p1): p1 = 1.05 bar
10. pressure on the pipe end (p2): p2 = 1.0491879 bar
11. pressure drop (p1-p2): p1-p2 = 0.8120465 mbar
12. velocity at the start (V1): V1 = 2.179628 m/s
13. velocity at the end (V2): V2 = 2.1813147 m/s