Laars FT Series Installation And Operation Instructions Manual page 31

The FT Series Heating Only, Boiler
Natural Gas Pipe Sizing (Maximum)
Maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 0.5psi or less
and a pressure drop of 0.5 Inch water column. (Based of a 0.60 Specific gravity gas)
For reference only. Referenced from gas pipe manufacturer specifications for actual delivery capacity. The
DOE standard for Natural Gas is 1100 BTU/ft
Pipe
size
10
1/2˝ 82
3/4˝ 192
1˝ 383
1-1/4˝ 639
1-1/2˝ 1260
2˝ 2930
Table 10. Length of Corrugated Stainless Steel Pipe.
Pipe
size
10
1/2˝ 172
3/4˝ 360
1˝ 678
1-1/4˝ 1390
1-1/2˝ 2090
2˝ 4020
Table 11. Length of Black Iron Pipe (Schedule 40 Metallic)
. Contact the local gas supplier for actual BTU/ft
3
20 30 40
58 47 41
137 112 97
269 218 188
456 374 325
888 723 625
2080 1700 1470
20 30 40
118 95 81
247 199 170
466 374 320
957 768 657
1430 1150 985
2760 2220 1900
Length (ft)
50 60 80
37 37 29
87 80 69
168 153 132
292 267 232
559 509 440
1320 1200 1040
(Refer to the ANSI Z223.1 NATIONAL
Length (ft)
50 60 80
72 65 56
151 137 117
284 257 220
583 528 452
873 791 677
1680 1520 1300
(Refer to the ANSI Z223.1 NATIONAL
rating.
3
100 150 200
26 20 18
62 48 44
118 91 82
208 171 148
393 320 277
933 762 661
FUEL GAS CODE 2012 EDITION)
100 150 200
50 40 34
104 83 71
195 157 134
400 322 275
600 482 412
1160 928 794
FUEL GAS CODE 2012 EDITION)
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