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Condensate Generated in Insulated Steam Pipes (kg/h per 100m)

Heat loss from steam pipes generates condensate which must be drained from the system

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The diagram and table below can be used to indicate condensate generated due to heat loss in insulated steam pipes.

Condensate generated in insulated steam pipes

Insulated steam pipes and generated condensate - Imperial units

Condensate Load (kg/h per 100 m)
Steam Pressure (bar)	Pipe Size (mm)
Steam Pressure (bar)	50	65	80	100	125	150	200	250	300
0.7	9	10	13	16	19	24	30	36	44
2	11	13	16	20	24	29	37	46	55
4	15	18	21	28	37	42	51	63	75
7	18	22	26	32	41	48	60	75	89
12	24	28	34	39	49	57	79	99	117
16	29	35	43	54	67	80	99	123	147
20	31	38	46	57	71	83	105	131	155
28	34	41	50	63	78	92	117	145	173
35	41	50	59	74	92	110	137	172	204
42	45	59	66	83	103	124	155	193	229

1 inch = 25.4 mm

The table is based on a surrounding temperature of 20^oC and 80% insulation efficiency compared with uninsulated pipes.

At a surrounding temperature -20^oC approximately 50% condensate load should be added.

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Related Topics

Steam and Condensate - Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more
Steam - Heat Loss and Insulation - Steam and condensate pipes - heat loss uninsulated and insulated pipes, insulation thickness and more

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Engineering ToolBox, (2003). Condensate Generated in Insulated Steam Pipes (kg/h per 100m). [online] Available at: https://www.engineeringtoolbox.com/condesate-insulated-steam-pipes-d_263.html [Accessed Day Mo. Year].

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