1、AWWA Standard SM Swing-Check Valves for Waterworks Service, 2-In. Through 48-In. (50-mm Through 1,200-mm) NPS Effective date: June 1, 2017. First edition approved by AWWA Board of Directors June 20, 1976. This edition approved Jan. 14, 2017. Approved by American National Standards Institute Jan. 3,
2、2017. ANSI/AWWA C508-17 (Revision of ANSI/AWWA C508-09) Copyright 2017 American Water Works Association. All Rights Reserved. ii AWWA Standard This document is an American Water Works Association (AWWA) standard. It is not a specification. AWWA standards describe minimum requirements and do not cont
3、ain all of the engineering and administrative information normally contained in specifications. The AWWA standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specified by the user, the product or service is not fully defined. AWWA pub-
4、lication of a standard does not constitute endorsement of any product or product type, nor does AWWA test, certify, or approve any product. The use of AWWA standards is entirely voluntary. This standard does not supersede or take precedence over or displace any applicable law, regulation, or code of
5、 any governmental authority. AWWA standards are intended to represent a consensus of the water industry that the product described will provide satisfactory ser- vice. When AWWA revises or withdraws this standard, an official notice of action will be placed on the first page of the Official Notice s
6、ection of Journal American Water Works Association. The action becomes effective on the first day of the month following the month of Journal American Water Works Association publication of the official notice. American National Standard An American National Standard implies a consensus of those sub
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8、d or not, from manufacturing, marketing, purchasing, or using products, processes, or proce - dures not conforming to the standard. American National Standards are subject to periodic review, and users are cau- tioned to obtain the latest editions. Producers of goods made in conformity with an Ameri
9、can National Standard are encouraged to state on their own responsibility in advertising and promotional materials or on tags or labels that the goods are produced in conformity with particular American National Standards. Caution n oti Ce : The American National Standards Institute (ANSI) approval
10、date on the front cover of this standard indicates completion of the ANSI approval process. This American National Standard may be revised or withdrawn at any time. ANSI procedures require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of p
11、ublication. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; 212.642.4900; or emailing infoansi.org. hours of work by your fellow water pr
12、ofessionals. Revenue from the sales of this AWWA material supports ongoing product development. Unauthorized distribution, either electronic or photocopied, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of ISBN-13, print: 978-1-625
13、76-220-7 eISBN-13, electronic: 978-1-61300-420-3 DOI: http:/dx.doi.org/10.12999/AWWA.C508.17 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information or retrieval system
14、, except in the form of brief excerpts or quotations for review purposes, without the written permission of the publisher. Copyright 2017 by American Water Works Association Printed in USA Copyright 2017 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standard
15、s Subcommittee for Swing-Check Valves, which reviewed and approved this standard, had the following personnel at the time of approval: J.V. Ba llun, Chair S. Allen, Bray International, Houston, Texas. (AWWA) J.V. Ballun, Val-Matic Valve & Manufacturing Corporation, Elmhurst, Ill. (AWWA) D.E. Burczyn
16、ski, Kennedy Valve, Elmira, N.Y. (AWWA) P. Gifford, Mueller Company, Chattanooga, Tenn. (AWWA) T.C. Harbour, Mueller Company, Elmhurst, Ill. (AWWA) R.L. Larkin, American Flow Control, Birmingham, Ala. (AWWA) L. Larson, DeZURIK, Sartell, Minn. (AWWA) G.E. Laverick, UL LLC, Northbrook, Ill. (AWWA) T.
17、OShea, DeZURIK-APCO, Schaumburg, Ill. (AWWA) N. Peyton, Henry Pratt Company, Aurora, Ill. (AWWA) J.H. Wilber, American AVK, Littleton, Colo. (AWWA) The AWWA Standards Committee on Gate Valves and Swing-Check Valves, which reviewed and approved this standard, had the following personnel at the time o
18、f approval: Joseph J. Gemin, Chair General Interest Members J.M. Assouline, CH2M, Englewood, Colo. (AWWA) M.D. Bennett, MWH Americas, Cleveland, Ohio (AWWA) D. Dieffenbach, Carollo Engineers Inc., Phoenix, Ariz. (AWWA) J.J. Gemin, AECOM, Kitchener, Ont., Canada (AWWA) J. Hebenstreit, UL LLC, Northbr
19、ook, Ill. (AWWA) M.C. Johnson, Utah Water Research Laboratory, Logan, Utah (AWWA) J.S. Olson, Advanced Engineering and Environmental Services, Watford City, N.D. (AWWA) S.M. Passarelli,* Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) T.R. Volz, URS Corporation, Denver, Colo. (AWWA) * Liaison
20、, nonvoting Alternate Copyright 2017 American Water Works Association. All Rights Reserved. iv Producer Members J.V. Ballun, Val-Matic Valve & Manufacturing Corporation, Elmhurst, Ill. (AWWA) J. Bolender, J&S Valve Inc., Huffman, Texas (AWWA) D.E. Burczynski,* Kennedy Valve, Elmira, N.Y. (AWWA) S.S.
21、 Dalton,* Val-Matic Valve & Manufacturing Corporation, Elmhurst, Ill. (AWWA) P. Gifford,* Mueller Company, Chattanooga, Tenn. (AWWA) T.C. Harbour, Mueller Company, Decatur, Ill. (AWWA) D. Johnston,* East Jordan Iron Works Inc., East Jordan, Mich. (AWWA) R.L. Larkin,* American Flow Control, Birmingha
22、m, Ala. (AWWA) R. Looney, American AVK, Minden, Nev. (AWWA) T.J. Mettler, Waterous Company, South Saint Paul, Minn. (AWWA) J. Riese, Clow Valve Co., Oskaloosa, Iowa (AWWA) D.B. Scott, AMERICAN Flow Control, Birmingham, Ala. (AWWA) J.H. Wilber,* American AVK, Littleton, Colo. (AWWA) K.J. Wright, East
23、 Jordan Iron Works, East Jordan, Mich. (AWWA) User Members M. Garcia, Standards Council Liaison, Denver Water, Denver, Colo. (AWWA) B. Hasanabadi, Colorado Springs Utilities, Colorado Springs, Colo. (AWWA) S. Hattan, Tarrant Regional Water District, Ft. Worth, Texas (AWWA) K.S. Jeng-Bulloch, City of
24、 Houston/PW & Engineering, Houston, Texas (AWWA) M. MacConnell, Metro Vancouver, Vancouver, B.C., Canada (AWWA) A. Quiniones, US Bureau of Reclamation, Denver, Colo. (AWWA) D. M. Rausch, Aurora Water Department, Aurora, Colo. (AWWA) P. Ries, Denver Water, Denver, Colo. (AWWA) * Alternate Liaison, no
25、nvoting Copyright 2017 American Water Works Association. All Rights Reserved. v Contents All AWWA standards follow the general format indicated subsequently. Some variations from this format may be found in a particular standard. SEC. PAGE SEC. PAGE Foreword I Introduction vii I.A Background . vii I
26、.B History vii I.C Acceptance vii II Special Issues. . viii III Use of This Standard ix III.A Purchaser Options and Alternatives ix III.B Modification to Standard x IV Major Revisions . x V Comments x Standard 1 General 1.1 Scope 1 1.2 Purpose . 3 1.3 Application 3 2 References 3 3 Definitions . 5 4
27、 Requirements 4.1 Permeation 6 4.2 Data to Be Supplied by Manufacturer 7 4.3 Materials . 7 4.4 General Design . 10 4.5 Fabrication 15 5 Verification 5.1 Inspection . 16 5.2 Testing 16 5.3 Nonconformance 17 6 Delivery 6.1 Marking 17 6.2 Packaging and Shipping 17 6.3 Affidavit of Compliance 17 Appendi
28、x A Installation, Operation, and Maintenance of Swing-Check Valves for Waterworks Service 19 A.1 General . 19 A.2 Unloading . 19 A.3 Storage 19 A.4 Inspection Prior to Installation 20 A.5 Installation 20 A.6 Field Testing 20 A.7 Owners Records . 21 A.8 Operation 21 A.9 Maintenance . 21 Copyright 201
29、7 American Water Works Association. All Rights Reserved. vi SEC. PAGE SEC. PAGE Figure 1 Various Types of Swing-Check Valves 2 Tables 1 Copper Alloys . 8 2 End-To-End Dimensions for Flanged-End Valves . 11 3 Minimum Thickness for Ductile-Iron Connecting End Flanges . 12 4 Excess Flange Thickness 13
30、Copyright 2017 American Water Works Association. All Rights Reserved. vii Foreword This foreword is for information only and is not a part of ANSI*/AWWA C508. I. Introduction. I.A. Background. The swing-check valve has been commonly used in the waterworks industry for over a century. Swing-check val
31、ves are designed to prevent backflow by automatically closing upon flow reversal. I.B. History. Following approval by the AWWA Standards Council on June 25, 1970, the Standards Committee on Gate Valves and Swing-Check Valves was assigned the project of preparing a new AWWA standard for swing-check v
32、alves. Committee discussion of the first draft began on Nov. 18, 1970. Following an extensive period of discussion and development by user, producer, and general-interest members of that committee, and after extensive review by Committee 112 of the Manufacturers Standardization Society of the Valve
33、and Fittings Industry, the first edition was approved on June 20, 1976. Subsequent editions were approved by the AWWA Board of Directors on Feb. 1, 1982, Jan. 31, 1993, Jan. 21, 2001, and Jan. 25, 2009. This edition was approved on Jan. 14, 2017. I.C. Acceptance. In May 1985, the US Environmental Pr
34、otection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additives. Other members of the original consortium included the Water
35、 Research Foundation (formerly AwwaRF) and the Conference of State Health and Environmental Managers (COSHEM). The American Water Works Association (AWWA) and the Association of State Drinking Water Administrators (ASDWA) joined later. In the United States, authority to regulate products for use in,
36、 or in contact with, drinking water rests with individual states. Local agencies may choose to impose requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives from such products, state and local agencies may use various ref
37、erences, including 1. Specific policies of the state or local agency. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Water Research Foundation, 6666 West Quincy Avenue, Denver, CO 80235. Persons outside the United States should contact the appropriate
38、 authority having jurisdiction. Copyright 2017 American Water Works Association. All Rights Reserved. viii 2. Two standards developed under the direction of NSF*: NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. 3. Other
39、references including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agency. Various certification organizations may be involved in certifying products in accor- dance with NSF/ANSI 61. Individual states or local agencies
40、have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certi- fication organizations may vary from jurisdiction to jurisdiction. Annex A, “Toxicology Review and Evaluation Procedures,” to NSF/ANSI 61 does not stipulate a maximum allowable level
41、(MAL) of a contaminant for substances not regulated by a USEPA final maximum contaminant level (MCL). The MALs of an unspecified list of “unregulated contaminants” are based on toxicity testing guidelines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures
42、 may not always be identical, depending on the certifier. ANSI/AWWA C508 does not address additives requirements. Thus, users of this standard should consult the appropriate state or local agency having jurisdiction in order to 1. Determine additives requirements including applicable standards. 2. D
43、etermine the status of certifications by all parties offering to certify prod- ucts for contact with, or treatment of, drinking water. 3. Determine current information on product certification. II. Special Issues. 1. The m ajority of swing-check valves supplied for pump check installations are provi
44、ded with an assisted closure feature such as a counterweight or spring to reduce check-valve slam. These requirements should be reviewed with the valve manufacturer. 2. Check valves may be subject to excessive wear if there is insufficient flow to open the valve fully. Manufacturers can supply infor
45、mation during the valve sizing process to prevent this from occurring. 3. This standard requires that the valves be seat tested at the rated working pressure of the valve (Sec. 5.2.2). For applications where a low operating pressure will be encountered, a special low-pressure leak test pressure shou
46、ld be specified. * NSF International, 789 North Dixboro Rd., Ann Arbor, MI 48113. Both publications available from National Academy of Sciences, 500 Fifth Street, NW, Washington, DC 20001. Copyright 2017 American Water Works Association. All Rights Reserved. ix 4. Chlorine and chloramine degradation
47、 of elastomers: The selection of materi- als is critical for water service and distribution piping in locations where there is a pos- sibility that elastomers will be in contact with chlorine or chloramines. Documented research has shown that elastomers such as gaskets, seals, valve seats, and encap
48、su- lations may be degraded when exposed to chlorine or chloramines. The impact of degradation is a function of the type of elastomeric material, chemical concentration, contact surface area, elastomer cross section, and environmental conditions as well as temperature. Careful selection of and speci
49、fications for elastomeric materials and the specifics of their application for each water system component should be considered to provide long-term usefulness and minimum degradation (swelling, loss of elasticity, or softening) of the elastomer specified. III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A. Purchaser Options and Alternatives. The following information should be provide
