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What is the difference between INCH and DN 2020/11/01 23:42:33

Nominal Pipe Size (NPS) is based on inches, and DN (diamètre nominal/nominal diameter) in millimetres.

ISO 6708 norm defines Nomimal Diameter for pipe components.

Nominal Pipe SizeNominal DiameterNominal Pipe SizeNominal DiameterNominal Pipe SizeNominal Diameter
NPSDNNPSDNNPSDN
[inches][mm][inches][mm][inches][mm]
1/8"66150481200
1/4"88200521300
3/8"1010250561400
1/2"1512300601500
3/4"2014350641600
1"2516400681700
1-1/4"3218450721800
1-1/2"4020500761900
2"5024600802000
2-1/2"6528700882200
3"8032800962400
3-1/2"90369001042600
4"1004010001122800
4-1/2"1154210501203000
5"1254411001283200


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