【AS澳大利亚标准】AS NZS 4158-2003 A1 Thermal-bonded polymeric coatings on valves and fittings for water industry purposes.doc
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1、AS/NZS 4158:2003(Incorporating Amendment No. 1)AS/NZS 4158:2003Australian/New Zealand StandardThermal-bonded polymeric coatings on valves and fittings for water industry purposesThe Standard is downloaded from Standard SharingAS/NZS 4158:2003This Joint Australian/New Zealand Standard was prepared b
2、y Joint Technical Committee WS-022, Valves for Water Supply Purposes. It was approved on behalf of the Council of Standards Australia on 3 January 2003 and on behalf of the Council of Standards New Zealand on 24 January 2003.This Standard was published on 5 March 2003.The following are represented o
3、n Committee WS-022:Australian Industry GroupAustralian Chamber of CommerceAustralian Valve Manufacturers AssociationBusiness New ZealandMaster Plumbers AustraliaNew Zealand Metal Casting Industry AssociationNew Zealand Water and Waste AssociationSociety of Mechanical Engineers AustraliaPlastics Pipe
4、 Institute Association of AustraliaWater Industry AllianceWater Services Association of AustraliaKeeping Standards up-to-dateStandards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions
5、 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 Standards may also be withdrawn.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 since the Standard was purchased.Detailed information about
6、 joint Australian/New Zealand Standards can be found by visiting the Standards Web Shop at .au or Standards New Zealand web site at www.standards.co.nz and looking up the relevant Standard in the on-line catalogue.Alternatively, both organizations publish an annual printed Catalogue with full detail
7、s of all current Standards. For more frequent listings or notification of revisions, amendments and withdrawals, Standards Australia and Standards New Zealand offer a number of update options. For information about these services, users should contact their respective national Standards organization
8、.We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Please address your comments to the Chief Executive of either Standards Australia or Standards New Zealand at the address shown on the
9、 back cover.This Standard was issued in draft form for comment as DR 02420.AS/NZS 4158:2003(Incorporating Amendment No. 1)Australian/New Zealand StandardThermal-bonded polymeric coatings on valves and fittings for water industry purposesOriginated as AS/NZS 4158.1:1994. Previous edition 1996.Second
10、edition 2003.Reissued incorporating Amendment No. 1 (September 2005).COPYRIGHT Standards Australia/Standards New ZealandAll 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 permiss
11、ion of the publisher.Jointly published by Standards Australia, GPO Box 476, Sydney, NSW 2001 and StandardsNew Zealand, Private Bag 2439, Wellington 6020ISBN 0 7337 5033 83AS/NZS 4158:2003The Standard is downloaded from Standard SharingPREFACEThis Standard was prepared by the Joint Standards Austral
12、ia/Standards New Zealand Committee WS-022, Valves For Water Supply Purposes, at the request of manufacturers and users of polymeric coatings for valves and fittings, to supersede AS/NZS 4158:1996.This Standard incorporates Amendment No. 1 (September 2005). The changes required by the Amendment are i
13、ndicated 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 requirements and performance tests for coating systems for valves and fittings used in supply systems including potable water, rec
14、ycled water and wastewater systems, together with default compliance requirements for the use of manufacturers and certification bodies.Changes to the previous edition area as follows:(a) The previous edition of the Standard covered fusion-bonded epoxies and polyamides which were typically used at t
15、hat time. This edition encompasses both thermoplastic and thermosetting coating materials(b) The limiting temperature for use has been changed to 50C to be consistent with the hot water immersion test temperature, which was reduced to accommodate thermoplastic coatings.(c) Limits on water absorption
16、 have been tightened to reflect current coating material performance.(d) Continuity testing has been updated to a high voltage test suitable for the typical coating thicknesses and cast substrates used for valve bodies and fittings.(e) Improvements have been made to other type tests, process verific
17、ation tests and the batch release tests. Batch release testing requirements have been placed on the coating material supplier.(f) Methods for demonstrating compliance with the Standard have been expanded and made mandatory.Polymeric coatings referred to in this edition of the Standard apply to both
18、thermoplastic and thermosetting, factory-applied, thermal-bonded coatings used to prevent corrosion of the internal and external surfaces of metallic valves and fittings.The terms normative and informative have been used in this Standard to define the application of the appendix to which they apply.
19、 A normative appendix is an integral part of a Standard, whereas an informative appendix is only for information and guidance.CONTENTSPageSECTION 1 SCOPE AND GENERAL1.1SCOPE . 41.2REFERENCED DOCUMENTS . 41.3DEFINITIONS . 4SECTION 2 REQUIREMENTS OF THE COATING SYSTEM2.1SCOPE OF SECTION . 62.2COATING
20、SYSTEM SPECIFICATION . 62.3TYPE TESTS . 62.4COATING MATERIAL SUPPLY REQUIREMENTS . 72.5EFFECT ON WATER QUALITY . 8SECTION 3 REQUIREMENTS FOR FACTORY-APPLIED COATING3.1SCOPE OF SECTION . 93.2COATING SYSTEM MATERIALS. 93.3PROCESS VERIFICATION. 93.4COATING APPLICATION AND BATCH RELEASE . 103.5REWORK. 1
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