SUGGESTED HANGER SPACING AND ROD SIZE FOR STRAIGHT HORIZONTAL RUNS - METRIC
HANGER SPACING, M
NOMINAL O.D., MM.	STANDARD STEEL PIPEª		COPPER TUBE	ROD SIZE, MM.
	WATER	STEAM	WATER
15	2.1	2.4	1.5	6.4
20	2.1	2.7	1.5	6.4
25	2.1	2.7	1.8	6.4
40	2.7	3.7	2.4	10
50	3.0	4.0	2.4	10
65	3.4	4.3	2.7	10
80	3.7	4.6	3.0	10
100	4.3	5.2	3.7	13
150	5.2	6.4	4.3	13
200	5.8	7.3	4.9	16
250	6.1	7.9	5.5	19
300	7.0	9.1	5.8	22
350	7.6	9.8	x	25
400	8.2	10.7	x	25
450	8.5	11.3	x	32
500	9.1	11.9	x	32

Source: Adapted from MSS Standard SP-69
ªSpacing does not apply where span calculations are made or where concentrated loads are placed between supports such as flanges, valves, specialties, etc.

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