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Fuel Pipe Sizing
Figures 8 and 9 provide the maximum capacity of pipe in
cubic feet of gas per hour for gas pressures of 0.5 psi or less
and a pressure drop of 0.3 in. water column. Specific gravity
of gas is shown.
Figure 8 — NATURAL GAS (NG) Pipe Size - Gas Flow Chart, in cubic feet per hour
NPT
10ft
15ft
1/2"
168
146
3/4"
346
293
1"
653
549
Natural Gas (sg=0.65)
Figure 9 — LIQUID PROPANE (LP) GAS Pipe Size - Gas Flow Chart, in cubic feet per hour
NPT
10ft
15ft
1/2"
110
96
3/4"
277
192
1"
428
360
Liquid Propane (LP) (sg=1.50)
INSTALLATION
20ft
30ft
40ft
115
93
79
240
192
163
446
360
307
20ft
30ft
40ft
76
61
52
158
126
107
293
236
202
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Listed values compensate for a nominal amount of restriction
from bends, fittings, etc. If an unusual number of fittings,
bends, or other restrictions are used, please refer to federal
and local codes.
50ft
60ft
70ft
70
63
59
145
132
120
274
250
230
50ft
60ft
70ft
46
42
38
95
87
79
180
164
151
15
80ft
90ft
100ft
55
51
48
113
106
99
211
197
187
80ft
90ft
100ft
36
33
32
74
69
65
139
129
123
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