Table 13. Suggested Pipe Size For Multiple Gas Appliances (Natural)
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| Maximum Capacity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W.C. (0.5 psi) or Less and a Pressure Drop of 0.5 in. W.C. |
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Nominal |
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| (based on 0.60 Specific Gravity Gas w/Heating Value of 1,000 BTU’s/Ft3) |
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| Length of Pipe in Feet (Metres) |
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Iron Pipe |
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Size | Cap. | 10 Ft. | 20 Ft. | 30 Ft. | 40 Ft. | 50 Ft. | 60 Ft. | 70 Ft. | 80 Ft. | 90 Ft. | 100 Ft. | 125 Ft. | 150 Ft. | 175 Ft. | 200 Ft. | |
(Inches) |
| (3.05) | (6.10) | (9.14) | (12.19) | (15.24) | (18.29) | (21.34) | (24.38) | (27.43) | (30.48) | (38.10) | (45.72) | (53.34) | (60.96) | |
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1 1/4" |
| BTU/hr | 1,400,000 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - |
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| kW | 410 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - |
1 1/2" |
| BTU/hr | 2,100,000 | 1,460,000 | 1,180,000 | 990,000 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - |
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| kW | 615 | 428 | 346 | 290 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - |
2" |
| BTU/hr | 3,950,000 | 2,750,000 | 2,200,000 | 1,900,000 | 1,680,000 | 1,520,000 | 1,400,000 | 1,300,000 | 1,220,000 | 1,150,000 | 1,020,000 | - - - | - - - | - - - |
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| kW | 1,157 | 805 | 644 | 556 | 492 | 445 | 410 | 381 | 357 | 337 | 299 | - - - | - - - | - - - |
2 1/2" |
| BTU/hr | 6,300,000 | 4,350,000 | 3,520,000 | 3,000,000 | 2,650,000 | 2,400,000 | 2,250,000 | 2,050,000 | 1,950,000 | 1,850,000 | 1,650,000 | 1,500,000 | 1,370,000 | 1,280,000 |
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| kW | 1,845 | 1,274 | 1,031 | 879 | 776 | 703 | 659 | 600 | 571 | 542 | 483 | 439 | 401 | 375 |
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3" |
| BTU/hr | 11,000,000 | 7,700,000 | 6,250,000 | 5,300,000 | 4,750,000 | 4,300,000 | 3,900,000 | 3,700,000 | 3,450,000 | 3,250,000 | 2,950,000 | 2,650,000 | 2,450,000 | 2,280,000 |
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| kW | 3,222 | 2,255 | 1,830 | 1,552 | 1,391 | 1,259 | 1,142 | 1,084 | 1,010 | 952 | 864 | 776 | 718 | 668 |
4" |
| BTU/hr | 23,000,000 | 15,800,000 | 12,800,000 | 10,900,000 | 9,700,000 | 8,800,000 | 8,100,000 | 7,500,000 | 7,200,000 | 6,700,000 | 6,000,000 | 5,500,000 | 5,000,000 | 4,600,000 |
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| kW | 6,736 | 4,627 | 3,749 | 3,192 | 2,841 | 2,577 | 2,372 | 2,197 | 2,109 | 1,962 | 1,757 | 1,611 | 1,464 | 1,347 |
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Table 14. Suggested Pipe Size For Multiple Gas Appliances (Propane Gas)
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| Maximum Capacity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W.C. (0.5 psi) or Less and a Pressure Drop of 0.5 in. W.C. |
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Nominal |
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| (based on 1.53 Specific Gravity Gas w/Heating Value of 2,500 BTU’s/Ft3) |
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| Length of Pipe in Feet (Metres) |
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Size | Cap. | 10 Ft. | 20 Ft. | 30 Ft. | 40 Ft. | 50 Ft. | 60 Ft. | 70 Ft. | 80 Ft. | 90 Ft. |
| 100 Ft. | 125 Ft. | 150 Ft. | 175 Ft. | 200 Ft. |
(Inches) |
| (3.05) | (6.10) | (9.14) | (12.19) | (15.24) | (18.29) | (21.34) | (24.38) | (27.43) | (30.48) | (38.10) | (45.72) | (53.34) | (60.96) | |
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1" | BTU/hr | 1,060,800 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | |
| kW | 311 | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | - - - | |
1 1/4" | BTU/hr | 2,184,000 | 1,482,000 | 1,201,200 | 1,029,600 | - - - | - - - | - - - | - - - | - - - |
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| kW | 640 | 434 | 352 | 302 | - - - | - - - | - - - | - - - | - - - |
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1 1/2" | BTU/hr | 3,276,000 | 2,277,600 | 1,840,800 | 1,544,400 | 1,404,000 | 1,263,600 | 1,170,000 | 1,076,400 | 1,014,000 |
| - - - | - - - | - - - | - - - | - - - |
| kW | 959 | 667 | 539 | 452 | 411 | 370 | 343 | 315 | 297 | - - - | - - - | - - - | - - - | - - - | |
2" | BTU/hr | 6,162,000 | 4,290,000 | 3,432,000 | 2,964,000 | 2,620,800 | 2,371,200 | 2,184,000 | 2,028,000 | 1,903,200 | 1,794,000 | 1,591,200 | 1,482,000 | 1,326,000 | 1,248,000 | |
| kW | 1,805 | 1,256 | 1,005 | 868 | 768 | 694 | 640 | 594 | 557 | 525 | 466 | 434 | 388 | 366 | |
2 1/2" | BTU/hr | 9,828,000 | 6,786,000 | 5,491,200 | 4,680,000 | 4,134,000 | 3,744,000 | 3,510,000 | 3,198,000 | 3,042,000 | 2,886,000 | 2,574,000 | 2,340,000 | 2,137,200 | 1,999,800 | |
| kW | 2,878 | 1,987 | 1,608 | 1,371 | 1,211 | 1,097 | 1,028 | 937 | 891 | 845 | 754 | 685 | 626 | 585 | |
3" | BTU/hr | 17,160,000 | 12,012,000 | 9,750,000 | 8,268,000 | 7,410,000 | 6,708,000 | 6,084,000 | 5,772,000 | 5,382,000 | 5,070,000 | 4,602,000 | 4,134,000 | 3,822,000 | 3,556,800 | |
4" | kW | 5,026 | 3,518 | 2,856 | 2,421 | 2,170 | 1,965 | 1,782 | 1,690 | 1,576 | 1,485 | 1,348 | 1,211 | 1,119 | 1,042 | |
BTU/hr | 35,880,000 | 24,648,000 | 19,968,000 | 17,004,000 | 15,132,000 | 13,728,000 | 12,636,000 | 11,700,000 | 11,232,000 | 10,452,000 | 9,360,000 | 8,580,000 | 7,800,000 | 7,176,000 | ||
| kW | 10,508 | 7,219 | 5,848 | 4,980 | 4,432 | 4,021 | 3,701 | 3,427 | 3,290 | 3,061 | 2,741 | 2,513 | 2,284 | 2,102 | |