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Copper Tubes - Heat Losses

Heat loss from uninsulated copper tubes vs. temperature differences between tube and air.

Values from the table below can be used to indicate the heat losses from uninsulated copper pipes:

Copper Tubes - Heat Losses
Nominal bore		Heat Loss
		(W/m)			(Btu/hr ft)
		Temperature difference (^oC)			Temperature difference (^oF)
(mm)	(inches)	22	38	55	40	68	99
15	1/2	21	32	45	22	34	47
22	3/4	28	43	60	29	45	53
28	1	34	53	76	36	56	79
35	1 1/4	41	64	89	43	67	93
42	1 1/2	47	74	104	49	77	108
54	2	59	93	131	62	97	136
67	2 1/2	71	111	156	74	116	162
76	3	83	129	181	87	135	189
108	4	107	165	232	111	172	241

1 W = 3.4 Btu/hr
1 ft (foot) = 0.3048 m

Copper Tubes - Uninsulated heat loss

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