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DN to Inches

 

Diameter Nominal
DN (mm)
Nominal Pipe Size
NPS (inches)
Outside diameter
(OD) inches (mm)
6 1/3 0.405 in (10.29 mm)
8 1/4 0.540 in (13.72 mm)
10 3/8 0.675 in (17.15 mm)
15 1/2 0.840 in (21.34 mm)
20 3/4 1.050 in (26.67 mm)
25 1 1.315 in (33.40 mm)
32 1 1/4 1.660 in (42.16 mm)
40 1 1/2 1.900 in (48.26 mm)
50 2 2.375 in (60.33 mm)
65 2 1/2 2.875 in (73.02 mm)
80 3 3.500 in (88.90 mm)
100 4 4.500 in (114.30 mm)
150 6 6.625 in (168.27 mm)
200 8 8.625 in (219.08 mm)
250 10 10.75 in (273.05 mm)