Propane Gas - Pipe Sizing

Sizing pipes with propane gas - for pressure above 5 psig (35 kPa)

The tables below can be used for sizing propane gas pipes with pressure above 5 psig (35 kPa).

Capacity of 100 ft Steel Pipe Schedule 40 (MBH)
Pressure Pipe Dimension (in)
Upstream
(psig)
Downstream
(psig)
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

propane gas pipe sizing diagram

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