Briggs & Stratton Generator owner manual Fuel Pipe Sizing

Briggs & Stratton Power Products Home Standby Generator

Installation, Start-Up and Owner’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.

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.

Figure 8 — NATURAL GAS (NG) Pipe Size - Gas Flow Chart, in cubic feet per hour

NPT	10ft	15ft	20ft	30ft	40ft	50ft	60ft	70ft	80ft	90ft	100ft
1/2”	168	146	115	93	79	70	63	59	55	51	48
3/4”	346	293	240	192	163	145	132	120	113	106	99
1”	653	549	446	360	307	274	250	230	211	197	187
Natural Gas (sg=0.65)
Figure 9 — LIQUID PROPANE (LP) GAS Pipe Size - Gas Flow Chart, in cubic feet per hour
NPT	10ft	15ft	20ft	30ft	40ft	50ft	60ft	70ft	80ft	90ft	100ft
1/2”	110	96	76	61	52	46	42	38	36	33	32
3/4”	277	192	158	126	107	95	87	79	74	69	65
1”	428	360	293	236	202	180	164	151	139	129	123

Liquid Propane (LP) (sg=1.50)

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