1 Scope
This standard gives the definition of nominal size when applied to components of a pipework system, and specifies the nominal size series used for pipework components.
This standard is applicable to pipework components whose nominal size is designated by DN.
2 Terms and definitions
For the purposes of this document, the following term and definition apply.
2.1
nominal size
an alphanumeric designation of size for components of a pipework system, which is used for reference purposes and comprises the letters DN followed by a dimensionless whole number
Notes:
1 This dimensionless number is directly related to the physical size (in mm), of the bore or outside diameter of the end connections.
2 The number following the letters DN does not represent a measurable value and shall not be used for calculation purposes except where specified in the relevant standard.
Foreword i
1 Scope
2 Terms and definitions
3 Nominal size series and selection
Annex A (Informative) Corresponding relation between nominal size DN and NPS
1 Scope
This standard gives the definition of nominal size when applied to components of a pipework system, and specifies the nominal size series used for pipework components.
This standard is applicable to pipework components whose nominal size is designated by DN.
2 Terms and definitions
For the purposes of this document, the following term and definition apply.
2.1
nominal size
an alphanumeric designation of size for components of a pipework system, which is used for reference purposes and comprises the letters DN followed by a dimensionless whole number
Notes:
1 This dimensionless number is directly related to the physical size (in mm), of the bore or outside diameter of the end connections.
2 The number following the letters DN does not represent a measurable value and shall not be used for calculation purposes except where specified in the relevant standard.
Contents of GB/T 1047-2019
Foreword i
1 Scope
2 Terms and definitions
3 Nominal size series and selection
Annex A (Informative) Corresponding relation between nominal size DN and NPS
