UNI EN 1759-3 : 2004

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
  4.1 General
  4.2 Standard designation
  4.3 Information to be supplied by the equipment
       manufacturer
5 General requirements
  5.1 Materials
  5.2 Repairs
  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
Annex A (informative) Information to be supplied by the equipment
                       manufacturer
Annex B (informative) Application and installation
Annex C (informative) Use of metric bolting in lieu of imperial
                       bolting
  C.1 General
  C.2 Gaskets
  C.3 Comparable nominal bolt sizes
  C.4 Imperial/metric bolt comparisons
Annex D (informative) Approximate masses of flanges and collars
Annex ZA (informative) Relationship between this European Standard
                       and the Essential Requirements of EU
                       Directive 97/23/EC
Bibliography

Defines requirements for circular copper alloy flanges and copper alloy collars combined with loose steel plate flanges in Class designations Class 150 and Class 300 and nominal sizes from DN 10 to DN 900.