Steam Pipes - Max. Flow and Pressure Drop

Pressure drop and maximum allowable flow in steam pipes.

	Mains	Laterals
Pressure(psi)	600	175	30	600	175	30
Pressure Drop (psi per 100 ft pipe)	0.7	0.5	0.3	1	0.7	0.5
Nominal Pipe Size (in)	Maximum Flow (10³* lb/h)*
3	6.2	2.7	0.9	7.5	3.6	1.2
4	12	5.7	2.5	15	7.5	3.2
6	33	16	6.6	40	21	8.5
8	63	32	14	76	42	18
10	108	58	25	130	76	32
12	158	87	39	190	115	50
14	217	117	54	260	155	70
16	300	166	78	360	220	100
18		227	101		300	130
20			132			170

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Steam Pipes - Max. Flow and Pressure Drop

Pressure drop and maximum allowable flow in steam pipes.

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