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1、AS 40872004 (Incorporating Amendment No. 1) Australian Standard Metallic flanges for waterworks purposes AS 40872004 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 This Australian Standard was prepared by Committee WS-022, Valves For Water Supply Purposes. It was approved on behalf of the
2、Council of Standards Australia on 30 September 2004. This Standard was published on 26 October 2004. The following are represented on Committee WS-022: Australian Chamber of Commerce and Industry Australian Industry Group Certification Interests (Australia) Engineers Australia Master Plumbers Austra
3、lia Plastics Industry Pipe Association of Australia Victorian Employers Chamber of Commerce Water Industry Alliance Water Services Association of Australia Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currenc
4、y, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published
5、 since the Standard was purchased. Detailed information about Standards can be found by visiting the Standards Web Shop at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly maga
6、zine, The Global Standard, has a full listing of revisions and amendments published each month. Australian StandardsTM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop. We also welcome s
7、uggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.org.au, or write to the Chief Executive, Standards Australia, GPO Box 476, Sydney, NSW 2001. This Standard was iss
8、ued in draft form for comment as DR 03434. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004 Australian Standard Metallic flanges for waterworks purposes Originated as AS 40871993. Previous edition 1996. Third edition 2004. Reissued incorporating Amendment No. 1 (August 2005) COPY
9、RIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia, GPO Box 476, Sydney, NSW 2001, Austral
10、ia ISBN 0 7337 6313 8 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004 2 PREFACE This Standard was prepared by the Standards Australia Committee WS-022, Valves For Water Supply Purposes, to supersede AS 40871996. This Standard incorporates Amendment No. 1 (August 2005). The chang
11、es required by the Amendment are indicated in the text by a marginal bar and amendment number against the clause, note, table, figure or part thereof affected. The objective of this Standard is to provide manufacturers with requirements for metallic flanges for waterworks purposes and installers of
12、flanged components guidance on the most appropriate jointing requirements to achieve a satisfactory long-term watertight joint. The first flange standard published in Australia was AS B52-1931, which was an endorsement of BS 10, the inch series flange British Standard, Flanges and bolting for pipes
13、valves and fittings. Britain metricated in 1970 and adopted European (ISO) dimensions for flanges whilst Australia chose to continue with the same inch series flange dimensions. AS 2129, Flanges for pipes, valves and fittings, was published in 1978 to supersede AS B52 but incorporated soft metric di
14、mensions. The AS/NZS 4331 series, Metallic flanges, was published in 1995 as an endorsement of ISO hard metric flanges The most common AS 2129 flange tables used for waterworks purposes were Tables D, C, E, F and H with pressure ratings of 700, 1200, 1400, 2100 and 3500 kPa respectively. Table C fla
15、nges were subsequently re-rated to 1400 kPa in AS 21291991 to reflect industry experience. AS 4087 was published in 1993 to provide a dedicated flange Standard for waterworks purposes with a rationalized range of flanges. Table E was eliminated and flanges were designated by Class allowable operatin
16、g pressure (AOP). The table below indicates bolting compatibility between AS 4087 and AS 2129 flanges. Bolting compatibility AS 4087 Flange classification AS 2129 Flange classification PN 14 D, C PN 16 D, C PN 21 F, H PN 35 F, H The principal changes to this Edition are as follows: (a) Replacement o
17、f PN 14 with PN 16 for steel flanges. (b) Amendments to the allowable operating pressures (AOPs) to align with waterworks practices. (c) Deletion of sizes greater than DN 150 for copper alloys. (d) Inclusion of additional sizes for ductile cast iron and steel flanges. (e) Amendments to the specifica
18、tions for jointing materials. For applications outside the limits specified in this Standard the appropriate flange details may be determined from AS 2129, Flanges for pipes, valves and fittings, and AS/NZS 4331, Metallic flanges. Statements expressed in mandatory terms in notes to figures are deeme
19、d to be requirements of this Standard. A1 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 3 AS 40872004 The terms normative and informative have been used in this Standard to define the application of the appendix to which they apply. A normative appendix is an integral part of a Standard,
20、whereas an informative appendix is only for information and guidance. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004 4 CONTENTS Page FOREWORD5 SECTION 1 SCOPE AND GENERAL 1.1 SCOPE 6 1.2 REFERENCED DOCUMENTS 6 1.3 APPLICATION.6 1.4 DEFINITIONS 6 1.5 CONFIGURATION.7 1.6 MARKING9
21、 SECTION 2 CLASSIFICATION AND ALLOWABLE PRESSURES 10 SECTION 3 MATERIALS 3.1 FLANGES. 11 3.2 FASTENERS. 11 3.3 FLANGE GASKETS 12 3.4 O-RINGS FOR FLANGES 12 SECTION 4 MANUFACTURING REQUIREMENTS, DIMENSIONS AND TOLERANCES 4.1 DIMENSIONS AND TOLERANCES. 13 4.2 CONTACT SURFACES 14 4.3 SPOT-FACING AND BA
22、CK-FACING OF FLANGES 14 4.4 PREPARATION FOR THE ATTACHMENT OF FLANGES. 15 APPENDICES A LIST OF REFERENCED DOCUMENTS . 16 B DIMENSIONS OF FLANGES 18 C FLANGE JOINTING GUIDLINES. 33 D PURCHASING GUIDELINES 35 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 5 AS 40872004 FOREWORD Limitations o
23、n the use of flanges specified in this Standard may be imposed by one or more of the following: (f) Material of construction. (g) Pressure class (h) Configuration. (i) DN (nominal size). (j) Whether installed in buried or submerged or above-ground and for the last, the method of support, i.e., beam
24、action. (k) Requirements of any relevant product Standard. Where a pipeline component or appurtenance has an allowable operating pressure (AOP) that is different to an available flange pressure class for the relevant material, the next highest flange pressure class should be specified. For example a
25、 PN 10 grey cast iron butterfly valve should incorporate a Figure B2 PN 14 flange and a PN 25 ductile iron fitting should incorporate a Figure B6 PN 35 flange. The designer of a pipeline or pressure-retaining equipment should evaluate the possible conditions to which flanges will be exposed. The des
26、igner should determine whether flanges according to this Standard are suitable for the proposed application. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004 6 Standards Australia .au STANDARDS AUSTRALIA Australian Standard Metallic flanges for waterworks purposes S E C T I O N 1
27、 S C O P E A N D G E N E R A L 1.1 SCOPE 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 PN 14, 16, 21 and 35 at operating temperatures not exceeding 80C. The Stan
28、dard 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. 1.2 REFERENCED DOCUMENTS The documents referred to in this Standard are listed i
29、n Appendix A. 1.3 APPLICATION Flange dimensions shall be in accordance with Appendix B. NOTES: 1 Guidelines for designers and installers on the selection of correct jointing requirements for flanges are detailed in Appendix C. 2 Guidelines for purchasers on information that should be supplied at the
30、 time of enquiry or order are detailed in Appendix D. 1.4 DEFINITIONS For the purpose of this Standard, the definitions below apply. 1.4.1 Allowable operating pressure (AOP) The allowable internal pressure, excluding surge that a component can safely withstand in service. 1.4.2 Allowable site test p
31、ressure (ASTP) Maximum pressure applied on site in a newly installed pipeline (includes a safety factor and allowances for surge). 1.4.3 Coating A corrosion-inhibiting medium applied to the surface of a flange. 1.4.4 DN (nominal size) An alphanumeric designation of size for components of a pipework
32、system, which is used for reference purposes. It comprises the letters DN followed by a dimensionless whole number, which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections. 1.4.5 Flange contact surface That part of the flange face upon
33、 which the gasket is compressed. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 7 AS 40872004 .au Standards Australia 1.4.6 Flange face The reference plane, which is perpendicular to the axis of the flange and coincident with the front of the flange (see Figure 1.2 and Appendix B). 1.4.7 F
34、lange thickness The distance from either the back face of a flange or, if the boltholes are spot-faced, the spot facing to the flange face (see Appendix B). 1.4.8 Fluid Water or wastewater at temperatures not exceeding 80C. 1.4.9 Integral flange A flange that is cast or forged as part of a pressure-
35、containing component. 1.4.10 Maximum allowable operating pressure (MAOP) Maximum internal pressure, including surge, that a component can safely withstand in service. 1.4.11 Pressure class (PN) A classification of flanges by PN number, based on the allowable operating pressure (AOP) expressed in Meg
36、apascals (PN = 10 AOP). 1.4.12 Temperature The temperature of the fluid contained by the pressure-containing component to which the flange is attached. 1.5 CONFIGURATION 1.5.1 General Flange configuration is determined by (a) the type, as specified in Clause 1.5.2; and (b) the face, as specified in
37、Clause 1.5.3. 1.5.2 Type The types of flanges are as follows (see Figure 1.1): (a) Blank (steel and ductile iron). (b) Plate fixed by brazing or welding (copper alloy and steel). (c) Screw-on (ductile iron). (d) Integral (i) with neck (ductile iron); and (ii) without neck (grey iron, copper alloy an
38、d steel). NOTE: For convenience, only the flat face variant of each type has been illustrated. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004 8 Standards Australia .au (a) Blank(b) Plate(c) Screw-on With neckWithout neck (d) Integral FIGURE 1.1 FLANGE TYPES 1.5.3 Flange face Fl
39、anges shall be manufactured with a flat face, with or without an O-ring groove, or raised face. This is summarized in Table 1.1. TABLE 1.1 SUMMARY OF FLANGE FACE TYPES Material Pressure class Face type Copper alloy 14 Flat 14 Flat 21 Flat Grey cast iron 35 Flat 16 Raised Ductile cast iron 35 Raised
40、16 Flat, O-ring or raised 21 Flat, O-ring or raised Steel 35 Flat, O-ring or raised (a) Flat(b) Raised(c) Flat O-ring groove Flange face FIGURE 1.2 FLANGE FACES Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 9 AS 40872004 .au Standards Australia 1.6 MARKING Flanges (other than integral fla
41、nges) shall be permanently and legibly marked on the rim or on the back of the flange between the rim and the pitch circle diameter, with the following information: (a) The number of this Standard, i.e., AS 4087. (b) DN (nominal size). (c) Pressure class, PN. (d) Material, e.g., DI, steel. (e) Manuf
42、acturers name or trademark. (f) Where thread sealants not complying with AS/NZS 4020 are used with screwed flanges, a warning statement Not for water supply. Integral flanges need not be marked in accordance with this Standard if the product Standard specifies information to be marked on the product
43、. NOTE: Manufacturers making a statement of compliance with this Australian Standard on a product, packaging, or promotional material related to that product are advised to ensure that such compliance is capable of being verified. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 AS 40872004
44、10 Standards Australia .au S E C T I O N 2 C L A S S I F I C A T I O N A N D A L L O W A B L E P R E S S U R E S The classification and allowable pressures for flanges shall be in accordance with Table 2.1. The integrity of a flanged joint is dependent upon the correct selection of jointing material
45、s and the correct method of assembly. NOTE: For guidelines on flange jointing, see Appendix C. The various types of flanges are not necessarily applicable to all Classifications and nominal sizes (see Table 2.1 and Appendix B). TABLE 2.1 CLASSIFICATION AND ALLOWABLE PRESSURES DN range (inclusive) Pr
46、essure Class PN AOP kPa MAOP kPa ASTP kPa Copper alloy Grey cast iron Ductile cast iron Steel 14 1 400 1 680 1 750 15 to 150 80 to 1 200 16 1 600 1 920 2 000 80 to 1 200 50 to 1 200 21 2 100 2 520 2 625 80 to 1 200 50 to 1 200 35 3 500 4 200 4 375 80 to 600 80 to 1 200 50 to 1 200 A1 Accessed by UNI
47、VERSITY OF SOUTH AUSTRALIA on 16 Mar 2009 11 AS 40872004 .au Standards Australia S E C T I O N 3 M A T E R I A L S 3.1 FLANGES Materials from which flanges are manufactured shall be free from defects that could affect the performance or function of the flanges at the allowable test pressures and ser
48、vice conditions. Flange material grades shall be in accordance with Table 3.1 and (a) for an integral flange, be of the same type or grade as the parent article; or (b) for a non-integral flange, be compatible with the material of the parent article to which it is to be joined. TABLE 3.1 FLANGE MATE
49、RIAL GRADES Material Standard Grades Copper alloy AS 1565 C83600, C90250, C90810, C92410 Ductile cast iron AS 1831 500/7, 450/10, 400/12,400/15 Grey cast iron AS 1830 T200, T250 Steel* AS 2074 AS 3678 ASTM A240M AS 2074 C3 250 304, 304L, 310, 316, 316L, 321 H3A, H3B, H3C, H5A, H5B, H5C, H6A, H6B, H6C * Other grades of steel or alloy steel may be used subject to the yield st