Propane Gas Piping - Capacity vs. Size
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The tables and diagrams below can be used to size propane gas pipe lines with pressures above 5 psig (35 kPa).
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| Pressure (psig) | Capacity of 100 ft Steel Pipe Schedule 40 (MBH) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Dimension (in) | |||||||||||
| Upstream | Downstream | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 | 3 | 4 | 5 |
| 10 | 9.5 | 606 | 1265 | 2385 | 4896 | 7335 | 14126 | 22514 | 39800 | 81180 | 146870 |
| 9.0 | 875 | 1830 | 3550 | 7083 | 10612 | 20439 | 32576 | 57590 | 117460 | 212500 | |
| 9 | 8.5 | 590 | 1239 | 2330 | 4785 | 7170 | 13810 | 22011 | 38910 | 79367 | 143590 |
| 8.1 | 810 | 1690 | 3190 | 6550 | 9810 | 18892 | 30112 | 53231 | 108575 | 196430 | |
| 8 | 7.6 | 510 | 1070 | 2020 | 4150 | 6215 | 11969 | 19076 | 33723 | 68785 | 124440 |
| 7.2 | 741 | 1550 | 2925 | 6006 | 8999 | 17330 | 27622 | 48830 | 99598 | 180190 | |
| 7 | 6.6 | 500 | 1046 | 1971 | 4050 | 6064 | 11678 | 18615 | 32904 | 67113 | 121420 |
| 6.3 | 675 | 1410 | 2658 | 5460 | 8178 | 15748 | 25100 | 44370 | 90500 | 163730 | |
| 6 | 5.7 | 419 | 875 | 1647 | 3380 | 5064 | 9750 | 15550 | 27481 | 56053 | 101400 |
| 5.4 | 605 | 1268 | 2387 | 4998 | 7339 | 14140 | 22530 | 39826 | 81233 | 146960 | |
| 5 | 4.7 | 407 | 850 | 1603 | 3290 | 4930 | 9490 | 15130 | 26748 | 54560 | 98710 |
| 4.5 | 536 | 1120 | 2110 | 4325 | 6481 | 12480 | 19890 | 35166 | 71730 | 129770 |
- inlet upstream pressure is more than 35 kPa (5 psig)
- one MBH is equivalent to 1000 BTU's per hour
- fittings factor 1.2 - equivalent pipe length = pipe length + 20%
- 1 CFM ≈ 2.54 MBH
- steel pipes schedule 40
Propane Gas Pipe Capacity Diagram - 10% Pressure Drop
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