Sizing Steam Pipes (lb/h)

Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure.

This table below can be used for fast calculation of steam pipes sch. 80.

in general - 80 ft/sec is a recommended steam velocity

Sizing Steam Pipes - in SI units (kg/h)

For full table with larger dimensions - rotate the screen!

Sizing of Steam Pipes (lb/h)
Capacity (lb/h)
Gauge Pressure (psi)	Steam Velocity (ft/s)	Pipe Size (in)
		1/2"	3/4"	1"	1 1/4"	1 1/2"	2"	2 1/2"	3"	4"	5"	6"	8"	10"	12"
		Inside Diameter (in)
		0.55	0.74	0.96	1.28	1.5	1.94	2.32	2.9	3.83	4.81	5.76	7.63	9.56	11.38
5	50	15	27	45	80	110	184	263	411	716	1130	1620	2843	4464	6325
	80	24	43	72	128	176	294	421	657	1146	1808	2593	4550	7142	10121
	120	35	64	108	192	264	441	631	986	1720	2712	3889	6824	10713	15181
10	50	18	33	55	97	134	224	320	500	873	1377	1974	3464	5438	7705
	80	29	52	88	156	214	358	512	801	1396	2203	3159	5542	8701	12329
	120	43	78	132	234	321	537	769	1201	2095	3304	4738	8313	13051	18493
20	50	25	45	76	135	186	310	444	694	1210	1909	2737	4803	7540	10684
	80	40	72	122	216	297	497	710	1110	1936	3054	4379	7685	12064	17095
	120	60	108	182	324	445	745	1066	1665	2904	4581	6569	11527	18096	25642
30	50	31	57	96	170	234	391	559	873	1522	2401	3443	6042	9485	13440
	80	50	91	153	272	374	625	894	1396	2436	3842	5509	9667	15176	21504
	120	75	136	230	408	560	937	1341	2095	3654	5762	8264	14500	22763	32256
40	50	38	69	116	206	282	472	676	1056	1842	2905	4165	7309	11474	16258
	80	61	110	185	329	452	756	1081	1689	2947	4647	6664	11694	18358	26013
	120	91	165	278	494	678	1134	1622	2534	4420	6971	9997	17541	27537	39020
60	50	51	92	155	275	378	633	905	1414	2466	3889	5577	9787	15364	21771
	80	81	147	248	441	605	1012	1448	2262	3946	6223	8924	15659	24582	34833
	120	122	221	372	661	908	1518	2172	3393	5918	9334	13386	23488	36873	52250
80	50	64	115	194	344	473	791	1132	1768	3084	4864	6975	12239	19213	27225
	80	102	184	310	551	757	1266	1810	2829	4934	7782	11160	19582	30741	43560
	120	153	276	465	827	1135	1899	2716	4243	7401	11673	16739	29373	46112	65340
100	50	76	138	233	413	568	950	1358	2122	3702	5839	8373	14693	23066	32684
	80	122	221	372	662	909	1520	2173	3396	5923	9342	13397	23508	36905	52294
	120	183	332	558	992	1363	2280	3260	5094	8885	14014	20096	35262	55358	78442
120	50	89	161	271	482	661	1106	1582	2472	4312	6801	9752	17112	26864	38066
	80	142	258	433	771	1058	1770	2531	3955	6899	10881	15603	27379	42982	60906
	120	213	386	650	1156	1587	2655	3797	5933	10348	16321	23405	41069	64473	91359
150	50	108	196	330	587	806	1349	1929	3013	5256	8290	11888	20859	32747	46402
	80	173	314	528	939	1290	2158	3086	4821	8409	13264	19020	33375	52394	74243
	120	260	471	793	1409	1935	3236	4628	7232	12614	19895	28530	50062	78592	111364
200	50	139	251	423	752	1032	1727	2469	3858	6730	10614	15221	26708	41928	59412
	80	222	402	676	1203	1652	2763	3951	6173	10767	16982	24353	42732	67084	95058
	120	333	603	1015	1804	2477	4144	5926	9260	16151	25473	36529	64098	100627	142588