Definition(s)
DN
Nominal Diameter.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
DN
Numerical designation of size that is common to all components in a piping system, other than components designated by outside diameters or by thread size.
- Note: 1 to entry: It is a convenient round number for reference purposes and is only loosely related to manufacturing dimensions.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
DN
Diametre nominal (nominal diameter).
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards