AS-1628-1999.pdf

AS 16281999 (Incorporating Amendment No. 1) Australian Standard Water supplyMetallic gate, globe and non-return valves AS 1628 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 This Australian Standard was prepared by Committee WS/22, Valves for Water Supply Purposes. It was approved on behalf of the Council of Standards Australia on 15 October 1999 and published on 5 December 1999. The following interests are represented on Committee WS/22: Australian Chamber of Commerce and Industry Australian Chamber of Manufactures Australian Industry Group Australian Valve Manufacturers Association Hunter Water Corporation Master Plumbers Australia Metal Trades Industry Association of Australia New Zealand Water and Wastes Association Society of Mechanical Engineers Australasia Water Services Association of Australia (WSAA) Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, 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 Standards may also be withdrawn.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 since the Standard was purchased. Detailed information about Standards can be found by visiting the Standards Australia web site at www.standards.com.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 magazine, The Australian Standard, has a full listing of revisions and amendments published each month. We also welcome suggestions for the improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.com.au, or write to the Chief Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001. This Standard was issued in draft form for comment as DR 99303. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 (Incorporating Amendment No. 1) Australian Standard Water supplyMetallic gate, globe and non-return valves Originated as AS B3101971. Previous edition AS 16281994. Final edition 1999. Reissued incorporating Amendment No. 1 (November 2001). COPYRIGHT © Standards Australia International 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 International Ltd GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0 7337 3036 1 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 162819992 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS/3, Valves for Water Supply Purposes, to supersede AS 16281994, Water supplyCopper alloy gate, globe and non-return valves. This Standard incorporates Amendment No. 1 (November 2001). The changes 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. This Standard is the result of a consensus among Australia/New Zealand representatives on the Committee to produce it as an Australian Standard. The objective of this Standard is to include design, materials and type tests required for valves nominated in this Standard. This edition includes modification to the title, amendments and additional smaller DN sizes. 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, whereas an informative appendix is only for information and guidance. Statements expressed in mandatory terms in notes to tables and figures are deemed to be requirements of this Standard. Support and contribution is acknowledged from water authorities, manufacturers, importers and Water Services Association of Australia (WSAA). Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 162819993 CONTENTS Page SECTION 1 SCOPE AND GENERAL 1.1SCOPE5 1.2REFERENCED DOCUMENTS5 1.3DEFINITIONS5 1.4DESIGNATION OF SIZE.5 1.5MARKING5 1.6ALLOWABLE PRESSURES6 SECTION 2 MATERIALS 2.1SCOPE OF SECTION.7 2.2COPPER .7 2.3COPPER ALLOY.7 2.4STAINLESS STEEL.7 2.5OTHER MATERIALS7 2.6CORROSION-RESISTANT METALLIC MATERIALS8 2.7CONTAMINATION OF WATER 8 SECTION 3 DESIGN AND MANUFACTURE 3.1SCOPE OF SECTION.9 3.2END CONNECTORS.9 3.3INTERCHANGEABILITY OF PARTS9 3.4SCREW THREADS (for factory-assembled components) 9 3.5THICKNESS OF METAL PARTS .10 3.6OPERATING METHODS FOR GATE AND GLOBE VALVES.10 3.7WATERWAY AND FLOW CAPABILITY11 3.8FLOW-WAY AREA.11 3.9FINISH12 SECTION 4 TESTING REQUIREMENTS 4.1SCOPE OF SECTION.13 4.2PRESSURE TESTS 13 4.3WATERTIGHTNESS.13 4.4STRENGTH OF OPERATING MECHANISM 13 4.5STRENGTH OF VALVE ASSEMBLY13 4.6TYPE TESTS13 SECTION 5 GATE AND GLOBE VALVES 5.1SCOPE OF SECTION.14 5.2BODY SEATS14 5.3FACE-TO-FACE DIMENSIONS14 5.4GATES .15 5.5STEMS .15 5.6BONNETS15 5.7GLANDS 15 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 162819994 Page SECTION 6 NON-RETURN VALVES 6.1SCOPE OF SECTION.16 6.2DESIGN16 6.3VALVE BODIES16 6.4NON-RETURN MECHANISM17 6.5COVERS.17 APPENDICES ALIST OF REFERENCED DOCUMENTS.18 BWATERTIGHTNESS TEST.20 CTORQUE TEST FOR OPERATING MECHANISM22 DSTRENGTH TEST FOR VALVE ASSEMBLY.24 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 www.standards.com.au© Standards Australia 5 STANDARDS AUSTRALIA Australian Standard Water supplyMetallic gate, globe and non-return valves S E C T I O N 1 S C O P E A N D G E N E R A L 1.1 SCOPE This Standard specifies requirements for metallic gate, globe and non-return valves of nominal sizes DN 8 to DN 100 for use in hot and cold water applications where the operating temperature does not exceed 99°C. 1.2 REFERENCED DOCUMENTS A list of the documents referred to in this Standard is given in Appendix A. 1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS/NZS 3500.0 and those below apply. 1.3.1 Component That part, or a sub-assembly of parts, which contribute to the construction of a total assembly by choice or design which may offer variations of fitment for the application to the major element of the product, whether produced by that same manufacturer or not. 1.3.2 Dashpot A device, usually an integral component of a valve, designed for the purpose of reducing the fluid velocity or damping vibration in the valve and the associated connected pipework system. 1.4 DESIGNATION OF SIZE The size of a valve that is nominally designated shall be the nominal size of the pipe with which it is intended to be used. 1.5 MARKING 1.5.1 Marking requirements All valves shall be legibly marked by a casting or indenting process with the following: (a)Manufacturers name or mark. (b)Nominal size. (c)Maximum operating pressure (d)An arrow (), permanently marked on the handwheel, showing the openclosure operating direction. (e)In the case of non-return valves, an indication on the top of the valve showing direction of flow. (f)For copper alloy valves the letters DR. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 © Standards Australiawww.standards.com.au 6 The marking shall be placed where it will be readily visible after installation. If this is not possible, an additional sticker shall be attached to the valve where it will be visible after installation. 1.5.2 Space for mark of certifying body Provision shall be made on every valve for the reception of the mark of the certifying body. The area shall be of sufficient size to accommodate the mark. Indented marks shall be applied in such a way as not to deform or otherwise damage the valve. Manufacturers may agree with the certifying body whether or not the mark will be applied to individual components in a valve that passes the required tests. 1.5.3 Components Components shall bear the manufacturers identification mark as a minimum requirement. The only exception being that in the event that the component is too small to be marked effectively with the manufacturers identification mark and the other marking as defined in this Standard, then the item being offered for sale shall be suitably packaged and marked in accordance with the nominated marking requirements. 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. 1.6 ALLOWABLE PRESSURES Allowable pressures for all valve classes shall be in accordance with Table 1.1. TABLE 1.1 ALLOWABLE PRESSURES Class of valve Allowable operating pressure, kPa Allowable maximum operating pressure,* kPa Allowable test pressure, kPa 14 21 35 1 400 2 100 3 500 1 600 2 500 4 000 2 100 3 150 5 250 *Seat leakage may occur at allowable maximum operating pressures. However, structural damage shall not be allowed. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 www.standards.com.au© Standards Australia 7 S E C T I O N 2 M A T E R I A L S 2.1 SCOPE OF SECTION The Section specifies requirements for the materials for valves and component parts of valves. 2.2 COPPER Copper shall comply with the following: (a)Wrought productsAS 2738.2. (b)Tubular componentsCopper tube with AS 1432. 2.3 COPPER ALLOY Copper alloy shall comply with the following: (a)Castings AS 1565, or capable of passing the requirements of Item (e) provided that the alloy contains not less than 58% copper and not more than 1% aluminium. (b)Hot pressings AS 1568 or an alloy complying with AS 2345. (c)Rod for machined parts AS 1567 or an alloy complying with AS 2345. (d)Tubular components Copper alloy tube with AS 1572 alloy designation 259. Where bent or stamped in the fabrication process, the tube shall be sufficiently stress- relieved so that it is capable of passing the mercurous nitrate test specified in AS 2136 after all fabrication processes are completed. For the purpose of this test, the entire tube component shall be tested before any coating or plating operation. (e)Dezincification resistance Copper alloys with AS 2345. 2.4 STAINLESS STEEL Stainless steel components can be produced using wrought, forged or cast stainless steel of the following types: (a)ASTM/AISI types 304, 316 or A276. (b)UNS types S32304, S32750, S31803 Duplex (ferritic-austenitic stainless steels). NOTE: ASTM A269, stainless steel types 304 or UNS 32304 are not recommended for water with chloride levels greater than 200 mg/L. 2.5 OTHER MATERIALS Other materials that may be used are the following: (a)Ceramics Ceramic materials may be used. (b)Filler metals Filler metals shall comply with the following: (i)Silver brazing alloy containing not more than 0.05% cadmium, complying with AS 1167.1. (ii)Copper-phosphorus brazing alloy complying with the requirements AS 1167.1 and having a minimum of 1.8% silver. (iii)Solder complying with the requirements of AS 1834.1 and having a maximum of 0.1% lead. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 © Standards Australiawww.standards.com.au 8 (c)Material for springs Materials for springs shall comply with one of the following: (i)Stainless steel to ASTM A313 A313M, types 304 or 316. (ii)Phosphor bronze to AS 2738.2, Alloy 518. NOTE: Grade 316 stainless steel or superior grade may be necessary for applications where exposure to higher concentration of chlorine than normal is likely. (d)Nickel-copper-iron Nickel-copper-iron shall comply with one of the following: (i)AS 2738.2, Alloy 713. (ii)ASTM B127, ASTM B163, ASTM B164 and ASTM B165. (e)Plastics Plastic materials may be used. Acetal plastics shall be copolymer. (f)Zinc alloy die castings Zinc alloy die castings shall comply with AS 1881 and shall be used only for handles and covers. Zinc alloy die castings shall not be threaded or splined. (g)Washers and sealing rings Washers and sealing rings shall comply with Clause 2.7 and the following: (i)Jointing washersBS 5292. (ii)Valve washersBS 3457. (iii)Gland packingasbestos-free and suitable for hot or cold water. (iv)O-ringsAS 1646, as applicable. (h)Lubricants Lubricants shall comply with Clause 2.7. NOTE: Handles and covers, other than T-head handles, may be manufactured from other materials not specified in this Section. 2.6 CORROSION-RESISTANT METALLIC MATERIALS For the purpose of this Standard, the following materials are deemed to be corrosion- resistant: (a)Copper as specified in Clause 2.2. (b)Copper alloy as specified in Clause 2.3. (c)Stainless steel as specified in Clause 2.4. (d)Materials for springs as specified in Clause 2.5(c). 2.7 CONTAMINATION OF WATER Materials in contact with potable water shall comply with AS/NZS 4020. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS 16281999 www.standards.com.au© Standards Australia 9 S E C T I O N 3 D E S I G N A N D M A N U F A C T U R E 3.1 SCOPE OF SECTION This Section specifies the requirements for the design and manufacture of valves. 3.2 END CONNECTORS 3.2.1 Union-end connectors Union-end connectors shall comply with AS 3688. 3.2.2 Compression ends Ends for connections to copper tubes by compression joint shall comply with the relevant requirements of AS 3688, as applicable. 3.2.3 Capillary ends Ends for connection to copper tubes by capillary joint shall comply with the relevant requirements of AS 3688, as applicable. 3.2.4 Flanged ends Flanged end dimensions and drillings shall comply with AS 2129 or AS 4087. 3.2.5 Screwed ends Internally screwed ends shall comply with AS 1722.1 Series RP. 3.3 INTERCHANGEABILITY OF PARTS All valve parts shall be interchangeable between units of the same size and model from any one manufacturer. 3.4 SCREW THREADS (for factory-assembled components) 3.4.1 General Threads of factory-assembled components may be right-hand or left- hand and shall comply with this Clause (3.4). 3.4.2 Fastening pipe threads Fastening pipe threads shall comply with AS 1722.2. Internal threads shall be Series G. External threads shall be Series GA or Series GB, unless otherwise specified in this Standard. 3.4.3 Other screw threads Other screw threads shall comply with a recognized Standard for threaded form and shall be marked accordingly. 3.4.4 Thread engagement 3.4.4.1 Other screw threads The minimum number of threads engaged for other screw threads shall comply with AS 3688. 3.4.4.2 Threaded ends The design of internally threaded parts shall make allowance for accommodating external pipe threads up to the maximum lengths of useful thread given in Column 2 of Table 3.1. A1 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 AS