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Table 13. Suggested Pipe Size For Multiple Gas Appliances (Natural)
Table 14. Suggested Pipe Size For Multiple Gas Appliances (Propane Gas)Length of Pipe in Feet (Metres)
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.
(based on 0.60 Specific Gravity Gas w/Heating Value of 1,000 BTU’s/Ft3)
Nominal
Iron Pipe
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)
1 1/4" BTU/hr 1,400,000 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
kW 410 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1 1/2" BTU/hr 2,100,000 1,460,000 1,180,000 990,000 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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 - - - - - - - - -
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
kW 1,845 1,274 1,031 879 776 703 659 600 571 542 483 439 401 375
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
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
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
Length of Pipe in Feet (Metres)
Nominal
Iron Pipe
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)
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 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
kW 640 434 352 302 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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
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
4" 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
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.
(based on 1.53 Specific Gravity Gas w/Heating Value of 2,500 BTU’s/Ft3)