NOMINAL DIAMETER DN (MM) TO NOMINAL PIPE SIZE NPS (INCH)CONVERSION TABLE

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DN(mm)NPS(inches)OUT.DIA.(MM)
61⁄810,29
81⁄413,72
103⁄817,15
151⁄221,34
203⁄426,67
25133,4
3211⁄442,16
4011⁄248,26
502 60,33
6521⁄273,02
80388,9
1004114,3
1506168,27
2008219,08
25010273,05
30012323,9
35014355,6
40016406,4
45018457
50020508
55022559
60024610
65026660
70028711
75030762

These are just rough values. Please refer to your supplier’s datasheets for certain values.

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