AS 4795-2006.pdf.pdf

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1、 AS 47952006 Australian Standard Butterfly valves for waterworks purposes AS 47952006 This Australian Standard was prepared by Committee WS-022, Valves for Waterworks Purposes. It was approved on behalf of the Council of Standards Australia on 7 July 2006. This Standard was published on 30 August 20

2、06. The following are represented on Committee WS-022: Australian Chamber of Commerce and Industry Australian Industry Group Engineers Australia Master Plumbers Australia Plastics Industry Pipe Association of Australia Victorian Employers Chamber of Commerce Water Industry Alliance Water Services As

3、sociation of Australia This Standard was issued in draft form for comment as DR 05378. Standards Australia wishes to acknowledge the participation of the expert individuals that contributed to the development of this Standard through their representation on the Committee and through public comment p

4、eriod. Keeping Keeping Keeping Keeping Standards upStandards upStandards upStandards up- - - -totototo- - - -datedatedatedate Australian Standards are living documents that reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and n

5、ew 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 Standards may also be withdrawn.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 that may have been published since the Standard was published. Detailed inform

6、ation about Australian Standards, drafts, amendments and new projects can be found by visiting www.standards.org.auwww.standards.org.auwww.standards.org.auwww.standards.org.au Standards Australia welcomes suggestions for improvements, and encourages readers to notify us immediately of any apparent i

7、naccuracies or ambiguities. Contact us via email at mailstandards.org.aumailstandards.org.aumailstandards.org.aumailstandards.org.au, or write to Standards Australia, GPO Box 476, Sydney, NSW 2001. AS 47952006 Australian Standard Butterfly valves for waterworks purposes First published as AS 4795200

8、2. Second Edition 2006. COPYRIGHT 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 47

9、6, Sydney, NSW 2001, Australia ISBN 0 7337 7703 1 AS 47952006 2 PREFACE This Standard was prepared by the Joints Standards Australia/Standards New Zealand Committee WS-022, Valves for Waterworks Purposes, to supersede AS 47952002. The objective of this Standard is to provide material requirements an

10、d performance tests for butterfly valves used in water supply systems, including potable water, recycled water and screened wastewater systems, together with default compliance requirements for the use of manufacturers and certification bodies. Statements expressed in mandatory terms in notes to tab

11、les and figures are deemed to be requirements of this Standard. Support and contribution is acknowledged from the Water Services Association of Australia (WSAA) and manufacturers. The terms normative and informative have been used in this Standard to define the application of the appendix to which t

12、hey apply. A normative appendix is an integral part of a Standard, whereas an informative appendix is only for information and guidance. 3 AS 47952006 CONTENTS Page SECTION 1 SCOPE AND GENERAL 1.1 SCOPE 4 1.2 APPLICATION.4 1.3 REFERENCED DOCUMENTS 4 1.4 DEFINITIONS 4 1.5 DESIGNATION OF SIZE.5 1.6 AL

13、LOWABLE OPERATING PRESSURES.6 SECTION 2 MATERIALS AND COMPONENTS 2.1 GENERAL 7 2.2 CORROSION-RESISTANT MATERIALS.7 2.3 CONTAMINATION OF WATER.7 2.4 O-RINGS (ELASTOMERIC TOROIDAL SEALING RINGS).7 SECTION 3 DESIGN 3.1 GENERAL 9 3.2 END CONNECTIONS 10 3.3 COMPONENT DESIGN. 10 3.4 OPERATION. 13 3.5 MANU

14、AL ACTUATORS AND GEARBOXES 13 3.6 LIFTING DEVICES 14 3.7 FASTENERS. 15 SECTION 4 PROTECTIVE COATINGS 4.1 GENERAL 16 4.2 COMPONENTS 16 SECTION 5 PERFORMANCE TESTS 5.1 GENERAL AND TEST SEQUENCE 17 5.2 TYPE TESTS 17 5.3 BATCH RELEASE TESTS. 19 SECTION 6 MARKING AND PACKAGING 6.1 MARKING 20 6.2 DIRECTIO

15、N OF CLOSURE FOR HANDWHEELS AND CAPS. 20 6.3 PACKAGING 20 APPENDICES A MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD. 21 B PURCHASING GUIDELINES 26 C REFERENCED DOCUMENTS 30 D ALTERNATIVE MATERIAL REQUIREMENTS 32 E ALTERNATIVE COATING TWO-PACK HIGH-BUILD EPOXY COATING . 33 AS 47952006 4 Stan

16、dards Australia www.standards.org.au STANDARDS AUSTRALIA Australian Standard Butterfly valves for waterworks purposes 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 Classes 10, 16, 21 and 35 manually operated resilient-seated wafer, tapped lugged, an

17、d flanged butterfly valves for waterworks purposes, with a maximum operating temperature of 40C. This Standard covers the following: (a) Manual actuators, gearboxes and standard spindle caps. (b) Water supply applications that include drinking water and recycled water as well as screened wastewater.

18、 (c) Valves of the following nominal sizes: (i) Seal-on-disc: DN 300 to DN 2000. (ii) Seal-in-body: DN 80 to DN 2000. (iii) Seal-on-body: DN 80 to DN 2000. (d) The capability of the valves to be fitted with electric, hydraulic or pneumatic actuators and to be operated using portable actuators. NOTE:

19、 Purchasing requirements that should be agreed upon at time of inquiry or order are given in Appendix B. 1.2 APPLICATION Means for demonstrating compliance with this Standard are given in Appendix A. 1.3 REFERENCED DOCUMENTS The documents referred to in this Standard are listed in Appendix C. 1.4 DE

20、FINITIONS 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 pressure (ASTP) The maximum internal hydrostatic pressure that can be applied on site to a component in a newly installed p

21、ipeline. 1.4.3 Bonded Glued or adhered where it can be removed. 1.4.4 Bulkhead test A test where the testing machine provides external restraint to make a watertight joint at each end of the valve. 5 AS 47952006 www.standards.org.au Standards Australia 1.4.5 Disc clearance dimension The dimension eq

22、uivalent to the minimum internal diameter of an adjacent pipe or flange, which will allow the disc to open fully without interference or damage to the disc sealing edge. 1.4.6 Free-end seat test A test where one side of the valve is pressurized with the disc in the closed position and the other side

23、 is unrestrained so that the valve liner is not externally compressed on the downstream end, which simulates a valve in a terminal position fastened at the upstream end only. 1.4.7 Maximum allowable operating pressure (MAOP) The maximum internal pressure, including surge, which a component can safel

24、y withstand in service. 1.4.8 Nominal size (DN) An alphanumeric designation of size for components of a pipework 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 th

25、e bore, or outside diameter of the end connections. 1.4.9 Pressure class (PN) A classification of valves by a PN number based on the allowable operating pressure expressed in hundreds of kilopascals. 1.4.10 Seal on disc A seal that is attached to the perimeter of the disc of the valve. 1.4.11 Seal i

26、n body A seal that is either clamped or retained integrally in the body of the valve. 1.4.12 Seal on body A seal that encapsulates the wetted part of the body and is also an integral part of the flange face, replacing the need for a gasket. 1.4.13 Type test A set of tests carried out to demonstrate

27、performance and repeated at a frequency nominated in Table A1. 1.4.14 Vulcanize To adhere the seal to the body by application of high temperature and the use of an agent. 1.5 DESIGNATION OF SIZE Valve size shall be designated by the nominal size as follows: (a) Seal-on-disc: DN 300, 350, 400, 450, 5

28、00, 600, 700, 750, 800, 900, 1000, 1200, 1400, 1600, 1800 and 2000. (b) Seal-in-body: DN 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 750, 800, 900, 1000, 1200, 1400, 1600, 1800 and 2000. (c) Seal-on-body: DN 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 750, 800

29、, 900, 1000, 1050, 1200, 1400, 1500, 1600, 1800 and 2000 AS 47952006 6 Standards Australia www.standards.org.au 1.6 ALLOWABLE OPERATING PRESSURES Allowable operating pressures shall be as given in Table 1.1. TABLE 1.1 CLASSIFICATION AND RATING Maximum flow velocity m/s PN AOP kPa MAOP kPa ASTP kPa R

30、ated Emergency 10 1 000 1 200 1 250 5 7.5 16 1 600 1 920 2 000 5 7.5 21 2 100 2 520 2 525 5 7.5 35 3 500 4 200 4 375 5 7.5 7 AS 47952006 www.standards.org.au Standards Australia S E C T I O N 2 M A T E R I A L S A N D C O M P O N E N T S 2.1 GENERAL The basic materials that shall be used for the man

31、ufacture of the valve components are listed in Table 2.1. The materials listed are the minimum acceptable standard materials. Alternative materials to those listed in Table 2.1 may be used, provided they are equivalent in performance, particularly with respect to strength, corrosion-resistance, valv

32、e operation and durability. Other permitted alternative materials, as listed in Appendix D, may be specified by the purchaser. Non-metallic materials used in the componentry of valves shall be fit for the intended purpose and shall exhibit dimensional stability after extended periods of time immerse

33、d in water and wastewater. NOTE: Material equivalence will be considered by a ruling committee of purchasers and suppliers selected by the Water Services Association of Australia (WSAA) from standing members of Committee WS-022. 2.2 CORROSION-RESISTANT MATERIALS For the purposes of this Standard, th

34、e following materials are deemed to be corrosion- resistant: (a) Copper alloys complying with AS 1565, AS/NZS 1567 or AS/NZS 1568 and complying with AS 2345. (b) Austenitic stainless steel complying with ASTM A276, series 300 containing not less than 8% nickel, except that Grade 303 is not permitted

35、, and duplex (ferritic- austenitic) stainless steels UNS S32750, S32304, S31803 and S31500. (c) Stainless steel complying with ASTM A313. (d) Phosphor bronze complying with AS 2738, C51000. (e) Copper nickel alloy complying with AS 2738 C70610 or C71630. Other materials may be considered based on pu

36、blished corrosion resistance data. 2.3 CONTAMINATION OF WATER Valves shall comply with AS/NZS 4020. A scaling factor of 0.01 shall be applied. 2.4 O-RINGS (ELASTOMERIC TOROIDAL SEALING RINGS) O-rings shall be made of elastomer that is not injuriously affected by the fluid, temperature or environment

37、al conditions to which the O-rings will be subjected in service. AS 47952006 8 Standards Australia www.standards.org.au TABLE 2.1 BASIC MATERIAL REQUIREMENTS Basic material Component Material Standard Grade Body Ductile cast iron* AS 1831 5007 40015 Ductile cast iron* AS 1831 5007 40015 Aluminium br

38、onze AS 1565 C95810 Ductile cast iron* AS 1831 5007 40015 Disc (seal-in-body, seal-on-body, seal-on-disc) Stainless steel ASTM A743 CF8M Stainless steel ASTM A276 316 or 431 Shaft and shaft extension Monel ASTM B164 Leaded tin bronze AS 1565 C92710, C93500, C93700 Shaft bearings (upper and lower) PT

39、FE, steel-lined Internal seal clamp ring and seal-facing ring Stainless steel ASTM A276 316 or 420 Liner, seals and O-rings Synthetic elastomer AS 1646.2 or AS 1646.3 CR, SBR, NBR EPDM Flat gasket Reinforced elastomer BS 5292 Fasteners Stainless steel ASTM A276 316 Disc pins Stainless steel ASTM A27

40、6 316 or 431 External spindle tube Hot-dip-galvanized steel AS/NZS 4680 External fasteners and eyebolts Hot-dip-galvanized steel AS 1214 * To be coated in accordance with Section 4. Higher tensile strength ductile irons in accordance with AS 1831 are acceptable. Materials other than those in BS 5292

41、 may be used for greater than Class 10. Pins may be plated. 9 AS 47952006 www.standards.org.au Standards Australia S E C T I O N 3 D E S I G N 3.1 GENERAL Valves shall be designed and sized to give satisfactory performance in meeting the specified operating conditions (see Note). All valve component

42、s and spare parts shall be interchangeable between valves of the same size, type and manufacture. NOTE: For information that should be supplied by the purchaser, see Appendix B. Valves shall be designed (a) for installation with the shafts horizontal, for use as isolating valves in water mains and s

43、creened wastewater mains, with the disc opening in the direction of the flow from the bottom; (b) for a minimum operating life of 50 years in buried installations; (c) for operation under full unbalanced head (maximum differential head) and opening and closing against maximum specified flows, includ

44、ing emergency flows in either direction; (d) for operation by hand-held portable actuators for valves larger than DN 300, which may impose torques on the spindle or gearbox input shaft as described in Clause 3.5.1; (e) for the capability to be fitted with electric, hydraulic or pneumatic actuators a

45、nd to be operated using portable actuators; and (f) for drop-tight sealing at AOP or a derated AOP in the closed position without the need for downstream flanges in lugged and double-flanged body patterns. NOTES: 1 Where the purchaser nominates that a lined valve be capable of acting as an end-of-li

46、ne fitting, agreement needs to be reached between the purchaser and supplier as to whether (a) a lined double-flanged or lugged bodied valve capable of maintaining drop tight sealing at AOP without the need for downstream flanges to secure the liner be supplied; or (b) where the operating conditions

47、 permit, a lined double-flanged or lugged bodied valve de-rated in accordance with Clause 5.2.6 be supplied. 2 De-rated, lined, double-flanged or lugged-bodied valves are only recommended for end- of-line use at operating pressures of 500 kPa or less. Calculations showing the stresses and deformatio

48、ns of valve components occurring under the most adverse conditions specified shall be provided on request (see Note). The head loss coefficient (Kv) shall be not greater than 0.8 when calculated by the following equation: gV H K 2/ 2 v = where H = total head loss, in metres V = velocity of flow, in

49、metres per second g = acceleration due to gravity, in metres per second squared Head loss coefficient (Kv) shall be based on hydraulic model or prototype testing. Details of the testing and calculation of the coefficient shall be provided if requested. AS 47952006 10 Standards Australia www.standards.org.au 3.2 END CONNECTIONS 3.2.1 General Valve bodies and end connections shall be flanged, wafer or tapped lugged. 3.2.2 Flanged Valves shall be flanged