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Condensate Generated in Cold Steam Pipes - SI Units

Huge amounts of condensate are generated when cold steam pipes are heated up must be drained from the pipes.

When cold steam pipes are heated up huge amounts of condensate are generated and must be drained from the pipes. It is important that steam traps are designed to handle start-up loads.

The diagram and table below can be used to roughly estimate the load of warm-up condensate generated when a steam system is heated up.

Condensate load generated i cold steam pipes at start-up - diagram

Condensate Generation in Cold Steam Pipes - Imperial Units

For full table - rotate the screen!

Condensate Generated in Cold Steam Pipes vs. Steam Pressure - SI Units
Steam Pressure (bar)	Condensate Generation (kg/100 m)
	Nominal Pipe Dimension (mm)
	50	65	80	100	125	150	200	250	300	350	400	450	500	600
0	9.2	14.4	19	27	37	47	71	101	134	159	208	262	308	309
0.35	10	15.9	20.8	29	40	52	69	112	146	174	227	287	338	470
0.7	11.3	17.8	23.4	33	45	58	88	125	165	196	255	322	379	529
1	12.2	19.5	25.4	36	50	64	96	135	179	212	277	350	412	575
2.5	13.4	21.3	27.8	39	53	70	105	148	195	232	303	383	450	627
4	15.8	25.2	33	47	63	82	123	175	233	276	360	454	535	745
5.5	17.8	28	37	52	71	92	138	196	260	308	402	507	598	832
7	19.3	30.6	40	57	77	100	151	214	284	335	438	553	651	906
8.5	20.1	31.8	42	59	80	104	157	223	293	349	455	574	676	942
10	20.8	33.1	43	62	83	108	162	230	305	361	472	595	700	997
12	22.6	35.8	47	67	90	117	176	250	331	392	513	646	760	1059
14	24.2	38.2	50	71	96	125	189	267	353	418	546	689	811	1130
16	28.1	45	58	83	113	146	219	312	412	489	638	805	947	1320
20	36	55	74	108	150	205	312	463	637	764	981	1228	1503	1700
25	39	59	80	117	162	222	338	502	692	828	1065	1362	1631	2315
30	41.5	64	85	124	173	237	360	534	735	882	1134	1420	1763	2464
40	44.3	68	91	132	184	253	385	570	784	940	1210	1514	1852	2627

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