Section 2 — Installation
Part No. 750-263 2-15
Table 2-4: Gas Line Capacity - Schedule 40 Metallic Pipe
Pipe Size
Nominal 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4"
Actual I.D. 0.622 0.824 1.049" 1.380" 1.610" 2.067" 2.469" 3.068" 4.026"
Length in feet **Maximum Capacity in Cubic Feet of Gas per Hour (cfh)
10 1,510 3,040 5,560 11,400 17,100 32,900 52,500 92,800 189,000
20 1,070 2,150 3,930 8,070 12,100 23,300 57,100 65,600 134,000
30 869 1,760 3,210 6,590 9,880 19,000 30,300 53,600 109,000
40 753 1,520 2,780 5,710 8,550 16,500 26,300 46,400 94,700
50 673 1,360 2,490 5,110 7,650 14,700 23,500 41,500 84,700
60 615 1,240 2,270 4,660 6,980 13,500 21,400 37,900 77,300
70 569 1,150 2,100 4,320 6,470 12,500 19,900 35,100 71,600
80 532 1,080 1,970 4,040 6,050 11,700 18,600 32,800 67,000
90 502 1,010 1,850 3,810 5,700 11,000 17,500 30,900 63,100
100 462 954 1,710 3,510 5,260 10,100 16,100 28,500 58,200
125 414 836 1,530 3,140 4,700 9,060 14,400 25,500 52,100
150 372 751 1,370 2,820 4,220 8,130 13,000 22,900 46,700
175 344 695 1,270 2,601 3,910 7,530 12,000 21,200 43,300
200 318 642 1,170 2,410 3,610 6,960 11,100 19,600 40,000
500 192 401 717 1,470 2,210 4,250 6,770 12,000 24,400
1000 132 275 493 1,010 1,520 2,920 4,650 8,220 16,800
1500 106 221 396 812 1,220 2,340 3,740 6,600 13,500
**Fuel: Natural Gas
**Inlet Pressure: 2.0 psi
**Pressure Drop: 1.0 psi
**Specific Gravity: 0.60
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