Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
    3.1 Flange
    3.2 DN (nominal size)
    3.3 PN
    3.4 Ductile iron
    3.5 Grey iron
    3.6 Malleable iron
    3.7 Joint
4 Designation and types
    4.1 Range of DN
    4.2 Range of PN designations
    4.3 Types of flanges
    4.4 Standard designation
    4.5 Information to be supplied by the purchaser
5 General requirements
    5.1 Flange material
    5.2 Repairs by welding
    5.3 Bolting
    5.4 Gaskets
    5.5 Pressure/Temperature (p/T) ratings
    5.6 Dimensions
    5.7 Flange facings
    5.8 Spot facing or back facing
    5.9 Tolerances
    5.10 Marking and stamping
    5.11 Quality assurance
Annex A (normative) Information to be supplied by the
purchaser
Annex B (informative) Notes to tables 6 to 12
Annex C (informative) Bibliography
Tables
1 Numerical values of the surface finish parameters
    (Ra and Rz) of flange jointing faces
2 Synoptic table for ductile iron flanges
3 Synoptic table for grey iron flanges
4 Synoptic table for malleable iron flanges
5 Dimensions for type B flange facings
6 Dimensions of PN 2,5 flanges
7 Dimensions of PN 6 flanges
8 Dimensions of PN 10 flanges
9 Dimensions of PN 16 flanges
10 Dimensions of PN 25 flanges
11 Dimensions of PN 40 flanges
12 Dimensions of PN 63 flanges
13 Tolerances on dimensions
14 Materials and assigned PN values
15 Pressure/temperature ratings for high strength
    ductile iron flanges
16 Pressure/temperature ratings for low strength ductile
    iron flanges
17 Pressure/temperature ratings for grey iron flanges
18 Pressure/temperature ratings for malleable iron
    flanges
Figures
1 Types of flanges
2 Flange facing types A and B
3 Dimensions of PN 2,5 flanges
4 Dimensions of PN 6 flanges
5 Dimensions of PN 10 flanges
6 Dimensions of PN 16 flanges
7 Dimensions of PN 25 flanges
8 Dimensions of PN 40 flanges
9 Dimensions of PN 63 flanges