Use and Care Manual

Table 2. For 8” WC – 10.5” WC initial supply pressure
Maximum Natural Gas Delivery Capacity (3.0” Pressure Drop)
Va
lues in Table are in Cubic Feet of Gas per Hour (0.60 Specific Gravity, 3.0” Pressure Drop, 8.0” WC or greater supply pressure,
inlet
pressure
less than 2psi). Contact your gas supplier for BTU/Cubic Foot ratings. For simplification of your calculations, 1 Cubic Foot of
Gas is approximately equivalent to 1000 BTU.
Pipe
Size
Length (including fittings)
10' 20' 30'40' 50'60' 70'80' 90'100'125'
(3m) (6m) (9m) (12m) (15m)(18m) (21m)(24m) (27m)(30m) (38m)
1/2" 454 312 250 214 190 172 158147 138131 116
3/4" 949 652 524 448 397 360331 308 289 27
32
42
1" 1,787 1,228 986 844 748 678624 580 544 51
44
56
1 1/4" 3,669 2,522 2,025 1,733 1,5361,392 1,2801,191 1,1181,056 936
1 1/2" 5,497 3,778 3,034 2,597 2,3022,085 1,9191,785 1,6751,582 1,402
2" 10,588 7,277 5,844 5,001 4,4334,016 3,6953,437 3,2253,046 2,700
2 1/2" 16,87511,598 9,314 7,971 7,0656,401 5,8895,479 1,5404,856 4,303
3" 29,832 20,503 16,465 14,092 12,48911,31610,4119,865 9,0878,584 7,608
4" 43678 30,020 24,107 20,632 18,28616,56915,24314,18113,30512,56811,139
Ta
ble 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of
BtuH (0.5” WC Pressure Drop) [Schedule 40 Metallic Pipe
]
For reference only
. Please consult gas pipe manufacturer for actual pipe capacities.
Pipe
Size
10' 20' 30' 40' 50' 60' 80' 100' 125' 150' 175' 200'
(3m) (6m) (9m) (12m) (15m)(18m) (24m)(30m) (38m)(45m) (53m)(60m)
1/2" 291 200 160 137 122 110101 94 89 84 74 67
3/4" 608 418 336 287 255 231212 197 185 175 15
51
40
1" 1,150 787 632 541 480434 400372 349330 29
22
65
1 1/4" 2,350 1,620 1,3001,110 985 892821 763 716677 60
05
43
1 1/2" 3,520 2,420 1,940 1,660 1,480 1,3401,230 1,1401,070 1,010899 814
2" 6,790 4,660 3,750 3,210 2,840 2,5702,370 2,2002,070 1,9501,730 1,570