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

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DN(mm)NPS(inches)OUT.DIA.(MM)
61810,29
81413,72
103817,15
151221,34
203426,67
25133,4
3211442,16
4011248,26
502 60,33
6521273,02
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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