Table 7-23
Maximum Capacity of Steel IPS Pipe in Cubic Feet Per Hour with a Gas Pressure of 0.5 psi or less and a Pressure Drop of 0.5 in. WC (based on a 0.60 specific gravity gas)
Nominal Iron Pipe Size (in.)	Internal Diameter (in.)	Tubing Length (ft)
Nominal Iron Pipe Size (in.)	Internal Diameter (in.)	10	20	30	40	50	60	70	80	90	100	125	150	175	200
1/4"	0.364	43	29	24	20	18	16	15	14	13	12	11	10	9	8
3/8"	0.493	95	65	52	45	40	36	33	31	29	27	24	22	20	19
1/2"	0.622	175	120	97	82	73	66	61	57	53	50	44	40	37	35
3/4"	0.824	360	250	200	170	151	138	125	118	110	103	93	84	77	72
1"	1.049	680	465	375	320	285	260	240	220	205	195	175	160	145	135
1-1'4"	1.380	1400	950	770	660	580	530	490	460	430	400	360	325	300	280
1-1/2"	1.610	2100	1460	1180	990	900	810	750	690	650	620	550	500	460	430
2"	2.067	3950	2750	2200	1900	1680	1520	1400	1300	1220	1150	1020	950	850	800
2-1/2"	2.469	6300	4350	3520	3000	2650	2400	2250	2050	1950	1850	1650	1500	1370	1280
3"	3.068	11000	7700	6250	5300	4750	4300	3900	3700	3450	3250	2950	2650	2450	2280
4"	4.026	23000	15800	12800	10900	9700	8800	8100	7500	7200	6700	6000	5500	5000	4600

*Table reproduced from National Fuel Gas Code NFPA-54

603 Hendee Street • P.O. Box 90054 • Springfield, MA 01139-0054
Tel 413.739.5631 • Toll Free 800.662.0208 • Fax 413.739.7325
www.gastite.com • gastite@titeflex.com