PREN 1759-3 : DRAFT 94

Foreword
0 Introduction
1 Scope
2 Normative references
3 Definitions
4 Designation
  4.1 Range of nominal sizes
  4.2 Class designations
  4.3 Types of flanges
  4.4 Information to be supplied by the purchaser
5 General requirements
  5.1 Flange 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 and back facing
  5.9 Tolerances
  5.10 Marking
  5.11 Quality assurance
Figure and tables
  Figures
  Figure 1 : Types of flanges
  Figure 2 : Dimensions of Class 150 flanges
  Figure 3 : Dimensions of Class 300 flanges
  Tables
  Table 1 : Synoptic table for copper alloy
            and composite flanges
  Table 2 : Dimensions of Class 150 flanges
  Table 3 : Dimensions of Class 300 flanges
  Table 4 : Tolerances
  Table 5 : Copper alloy materials
  Table 6 : Steel materials for composite and
            Clad blank flanges
  Table 7 : Pressure / temperature ( p / T ) ratings -
            General application
  Table 8 : Pressure / temperature ( p / T ) ratings -
            elevated temperature application
  Table 9 : Pressure / temperature ( p / T ) ratings -
            for large size flanges
Annex A : ( Informative) Information to be supplied by
          the Purchaser
Annex B : ( Informative ) Application and installation

Defines the types of flanges and their facings, dimensions and tolerances, bolt sizes, surface finish of facings, marking, testing, quality assurance and materials together with associated pressure/temperature (p/T) ratings.