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Gas carrying capacities for pipes in sizes 1/2" to 8"
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Carrying capacities for gas pipes size 1/2" to 8" can be found in the table below. Due to the pressure loss, the capacity decrease with length of pipe.
| Gas Carrying Capacities for House Piping (cubic feet per hour) | ||||||||||
| Length of pipe (feet) | Nominal Diameter of Pipes (inches) | |||||||||
| 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 3 | 4 | 6 | 8 | |
| 15 | 76 | 172 | 345 | 750 | 1,220 | 2,480 | 6,500 | 13,880 | 38,700 | 79,000 |
| 30 | 52 | 120 | 241 | 535 | 850 | 1,780 | 4,700 | 9,700 | 27,370 | 55,850 |
| 45 | 43 | 99 | 199 | 435 | 700 | 1,475 | 3,900 | 7,900 | 23,350 | 45,600 |
| 60 | 38 | 86 | 173 | 380 | 610 | 1,290 | 3,450 | 6,800 | 19,330 | 39,500 |
| 75 | . | 77 | 155 | 345 | 545 | 1,120 | 3,000 | 6,000 | 17,310 | 35,300 |
| 90 | . | 70 | 141 | 310 | 490 | 1,000 | 2,700 | 5,500 | 15,800 | 32,250 |
| 105 | . | 65 | 131 | 285 | 450 | 920 | 2,450 | 5,100 | 14,620 | 29,850 |
| 120 | . | . | 120 | 270 | 420 | 860 | 2,300 | 4,800 | 13,680 | 27,920 |
| 150 | . | . | 109 | 242 | 380 | 780 | 2,090 | 4,350 | 12,240 | 25,000 |
| 180 | . | . | 100 | 225 | 350 | 720 | 1,950 | 4,000 | 11,160 | 22,800 |
| 210 | . | . | . | 205 | 320 | 660 | 1,780 | 3,700 | 10,330 | 21,100 |
| 240 | . | . | . | 190 | 300 | 620 | 1,680 | 3,490 | 9,600 | 19,740 |
| 270 | . | . | . | 178 | 285 | 580 | 1,580 | 3,250 | 9,000 | 18,660 |
| 300 | . | . | . | 170 | 270 | 545 | 1,490 | 3,000 | 8,500 | 17,660 |
| 450 | . | . | . | 140 | 226 | 450 | 1,230 | 2,500 | 7,000 | 14,420 |
| 600 | . | . | . | 119 | 192 | 390 | 1,030 | 2,130 | 6,000 | 12,480 |
The table can be used for low pressure gas with specific gravity 0.6. The pressure drop is 0.3 inches of water for the whole length of pipe.
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