AS 4087-2004

1 - AS 4087-2004 METALLIC FLANGES FOR WATERWORKS PURPOSES
4 - PREFACE
6 - CONTENTS
7 - FOREWORD
8 - SECTION 1 SCOPE AND GENERAL
8 - 1.1 SCOPE
8 - 1.2 REFERENCED DOCUMENTS
8 - 1.3 APPLICATION
8 - 1.4 DEFINITIONS
8 - 1.4.1 Allowable operating pressure (AOP)
8 - 1.4.2 Allowable site test pressure (ASTP)
8 - 1.4.3 Coating
8 - 1.4.4 DN (nominal size)
8 - 1.4.5 Flange contact surface
9 - 1.4.6 Flange face
9 - 1.4.7 Flange thickness
9 - 1.4.8 Fluid
9 - 1.4.9 Integral flange
9 - 1.4.10 Maximum allowable operating pressure (MAOP)
9 - 1.4.11 Pressure class (PN)
9 - 1.4.12 Temperature
9 - 1.5 CONFIGURATION
9 - 1.5.1 General
9 - 1.5.2 Type
10 - 1.5.3 Flange face
11 - 1.6 MARKING
12 - SECTION 2 CLASSIFICATION AND ALLOWABLE PRESSURES
13 - SECTION 3 MATERIALS
13 - 3.1 FLANGES
13 - 3.2 FASTENERS
14 - 3.3 FLANGE GASKETS
14 - 3.4 O-RINGS FOR FLANGES
14 - 3.4.1 Material
14 - 3.4.2 Method of manufacture
14 - 3.4.3 Dimensions
14 - 3.4.4 Assembly
15 - SECTION 4 MANUFACTURING REQUIREMENTS, DIMENSIONS AND TOLERANCES
15 - 4.1 DIMENSIONS AND TOLERANCES
15 - 4.1.1 Thickness of flange
15 - 4.1.2 Outside diameter of flange
15 - 4.1.3 O-ring groove
15 - 4.1.4 Height of raised face
15 - 4.1.5 Diameter of raised face
16 - 4.1.6 Bolt holes
16 - 4.2 CONTACT SURFACES
16 - 4.2.1 General
16 - 4.2.2 Tolerance on flatness
16 - 4.3 SPOT-FACING AND BACK-FACING OF FLANGES
16 - 4.3.1 Parallelism of bearing surfaces
16 - 4.3.2 Diameter of spot-facing
16 - 4.3.3 Back-facing
17 - 4.3.4 Thickness of flanges after spot-facing or back-facing
17 - 4.4 PREPARATION FOR THE ATTACHMENT OF FLANGES
17 - 4.4.1 Screw-on flanges
17 - 4.4.2 Plate flanges
18 - APPENDIX A - LIST OF REFERENCED DOCUMENTS
20 - APPENDIX B - DIMENSIONS OF FLANGES
20 - B1 SCOPE
20 - B2 DIMENSIONS
35 - APPENDIX C - FLANGE JOINTING GUIDLINES
35 - C1 SCOPE
35 - C2 Jointing Guidelines
37 - APPENDIX D - PURCHASING GUIDELINES
37 - D1 GENERAL
37 - D2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
37 - D3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER

Specifies requirements for circular flanges manufactured from copper alloy, ductile cast iron, grey cast iron, or steel. The flanges covered are for use on pipes, pipefittings, valves and other equipment that are primarily intended for the conveyance or storage of water or wastewater.

This Standard specifies requirements for circular flanges manufactured from copper alloy, grey cast iron, ductile cast iron, or steel. It covers nominal sizes with pressure ratings for PN14, 16, 21 and 35 at operating temperatures not exceeding 80(C. The Standard also specifies requirements for jointing materials.Flanges are suitable for use on pipes, pipe fittings, valves and other equipment that are primarily intended for the conveyance or storage of water or wastewater.

First published as AS 4087-1993.
Second edition 1996.
Third edition 2004.