Section 2 — Installation
2-16 Part No. 750-263
Table 2-5: 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 2,350 4,920 9,270 19,000 28,500 54,900 87,500 155,000 316,000
20 1,620 3,380 6,370 13,100 19,600 37,700 60,100 106,000 217,000
30 1,300 2,720 5,110 10,500 15,700 30,300 48,300 85,400 174,000
40 1,110 2,320 4,380 8,990 13,500 25,900 41,300 75,100 149,000
50 985 2,060 3,880 7,970 11,900 23,000 36,600 64,800 132,000
60 892 1,870 3,520 7,220 10,300 20,300 33,200 58,700 120,000
70 821 1,720 3,230 6,640 9,950 19,200 30,500 54,000 110,000
80 764 1,600 3,010 6,180 9,260 17,800 28,400 50,200 102,000
90 717 1,500 2,820 5,800 8,680 16,700 26,700 47,100 96,100
100 677 1,420 2,670 5,470 8,200 15,800 25,200 44,500 90,300
125 600 1,250 2,360 4,850 7,270 14,000 22,300 39,500 80,500
150 544 1,140 2,140 4,400 6,590 12,700 20,200 35,700 72,900
175 500 1,050 1,970 4,040 6,060 11,700 18,600 32,900 67,100
200 465 973 1,830 3,760 5,640 10,900 17,300 30,600 62,400
500 283 593 1,120 2,290 3,430 6,610 10,300 18,600 38,000
1000 195 407 897 1,380 2,360 4,550 7,240 12,000 26,100
1500 156 327 616 1,270 1,900 3,650 5,820 10,300 21,000
**Fuel: Natural Gas
**Inlet Pressure: 3.0 psi
**Pressure Drop: 2.0 psi
**Specific Gravity: 0.60
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