AS/NZS 4331.3:1995

Metallic flanges Copper alloy and composite flanges

Standards Australia

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1 - AS/NZS 4331.3:1995 METALLIC FLANGES - COPPER ALLOY AND COMPOSITE FLANGES
4 - PREFACE
6 - CONTENTS
7 - 0 Introduction
7 - 1 Scope and field of application
8 - 2 Definitions and designation
8 - 2.1 Definitions
8 - 2.1.1 nominal size (DN):
8 - 2.1.2 nominal pressure (PN):
8 - 2.2 Designation of types and facings
8 - 3 Pressure/temperature (p/T) ratings
8 - 3.1 General
8 - 3.2 Rating of flanged joints
8 - 3.3 Temperature
8 - 4 Materials
8 - 4.1 Range of materials
8 - 4.2 Gaskets
8 - 4.3 Bolting
9 - 5 Dimensions
9 - 5.1 Range of nominal sizes
9 - 5.2 Dimensional details
9 - 6 Joint facings and surface finish
9 - 7 Drilling and spot-facing
9 - 8 Tolerances
10 - 9 Marking
10 - 10 Inspection and test
10 - 11 Information to be supplied by the purchaser
28 - 12 Limitations for flanges attached by soft solder or silver brazing
31 - Bibliography
32 - Annex - Application and installation

Abstract

Specifies international requirements for circular copper alloy and composite flanges in nominal pressure designations, PN 10 to PN 50. Types of flanges, their facings, dimensions, tolerances, bolt sizes, flange face surface finish, marking, testing, inspection and materials are specified. Pressure/temperature ratings for flanges of nominated alloys are given. This Standard is identical with and has been reproduced from ISO 7005-3:1988.

Scope

This part of ISO 7005 for a single system of flanges specifies requirements for circular copper alloy and composite flanges in the following nominal pressure ratings:

Series 1* Series 2*
lSO PN10 lSO PN6
ISO PN16 ISO PN25
ISO PN20 ISO PN40
ISO PN50

Attention is drawn to the need to refer to the pressure/temperature (p/T) ratings in tables 10, 10a), 10b) and 10c) for the maximum permissible working pressures and temperatures, particularly for ISO PN20 and ISO PN50 flanges and for ISO PN6, ISO PN10, ISO PN16 and ISO PN25 flanges attached by soft solder or silver brazing.

This part of ISO 7005 specifies the types of flanges and their facings, dimensions, tolerances, bolt sizes (including copper alloy), flange face surface finish, marking, testing, inspection and materials.

NOTES
1 Dimensions of gaskets will be the subject of a future International Standard.
2 For guidance, information on the application and installation of flanges is given in the annex, which does not form an integral part of this part of ISO 7005.