Fuel Pipe Sizing - Briggs & Stratton 40220 Installation, Start-Up And Operator's Manual

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
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