1、 ANSI/AWWA C512-07 (Revision of ANSI/AWWA C512-04) Air-Release, Air/Vacuum, and Combination Air Valves for Waterworks Service AWWA Standard Effective date: May 1, 2008. First edition approved by AWWA Board of Directors June 20, 1992. This edition approved June 24, 2007. Approved by American National
2、 Standards Institute Jan. 14, 2008. 6666 West Quincy Avenue Advocacy Denver, CO 80235-3098 Communications T 800.926.7337 Conferences www.awwa.org Education and TrainingScience and TechnologySections SM The Authoritative Resource on Safe Water Copyright 2008 American Water Works Association. All Righ
3、ts 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 contain all of the engineering and administrative information normally contained in specifications. The AWWA standards
4、 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 publication of a standard does not constitute endorsement of any product or product type, nor does AWWA test, certify,
5、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 codes of any governmental authority. AWWA standards are intended to represent a consensus of the water supply industry that
6、 the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be placed on the first page of the classified advertising section of Journal AWWA. The action becomes effective on the first day of the month following the month
7、of Journal AWWA publication of the official notice. American National Standard An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general
8、 public. The existence of an American National Standard does not in any respect preclude anyone, whether that person has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Standards ar
9、e subject to periodic review, and users are cautioned to obtain the latest editions. Producers of goods made in conformity with an American 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
10、in conformity with particular American National Standards. Ca u t i o n n o t i C e : The American National Standards Institute (ANSI) approval 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 a
11、ny time. ANSI procedures require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards
12、 Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; (212) 642-4900. 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, except i
13、n the form of brief excerpts or quotations for review purposes, without the written permission of the publisher. Copyright 2008 by American Water Works Association Printed in USA Copyright 2008 American Water Works Association. All Rights Reserved.iii Committee Personnel The AWWA Standards Committee
14、 on Waterworks Air-Release Valves, which developed and approved this standard, had the following personnel at the time of approval: Miles E. Wollam, Chair General Interest Members J.B. Allen, *Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) J.J. Cusack Jr., Bryant Associates, Boston, Mass. (A
15、WWA) R.G. Fuller, HDR Engineering Inc., Denver, Colo. (AWWA) W.A. Hunt, Consulting Engineer, Bozeman, Mont. (AWWA) K.W. Kells, *Consulting Engineer, Ivoryton, Conn. (AWWA) W.L. Meinholz, AB&H, A Donahue Group, Chicago, Ill. (AWWA) T.J. Stolinski Jr., Black & Veatch Corporation, Kansas City, Mo. (AWW
16、A) R.J. Wahanik, Hystras, Wyommissing, Pa. (AWWA) R.A. Ward, Dufresne & Associates PC, Windsor, Vt. (AWWA) M.E. Wollam, MWH Inc., Pasadena, Calif. (AWWA) Producer Members D. Alexander, Cla-Val Company, Costa Mesa, Calif. (AWWA) J.V. Ballun, Val-Matic Valve & Manufacturing Corporation, Elmhurst, Ill.
17、 (AWWA) R. DiLorenzo, Cla-Val Automatic Control Valves, Wauconda, Ill. (AWWA) K. Hall, APCO Willamette/Valve & Primer, San Clemente, Calif. (AWWA) P.O. Landon, Val-Matic Corporation, Elmhurst, Ill. (AWWA) J.E. Lescovich, GA Industries Inc., Cranberry Township, Pa. (AWWA) B.J. Lewis, Crispin Multiple
18、x Manufacturing Company, Berwick, Pa. (AWWA) W.J. Nicholl, GA Industries Inc., Cranberry Township, Pa. (AWWA) J.M. Radtke, Aqua-Dynamic Systems Inc., Wilkes-Barre, Pa. (AWWA) D.L. Smith, APCO Willamette/Valve & Primer, Schaumburg, Ill. (AWWA) N. Zloczower,* A.R.I. Flow Control Accessories, Israel (A
19、WWA) User Members A. Ali, Greater Vancouver Water District, Burnaby, B.C. (AWWA) J.H. Bambei Jr., Denver Water Department, Denver, Colo. (AWWA) N.E. Gronlund, East Bay Municipal Utility District, Oakland, Calif. (AWWA) * Liaison, nonvoting Alternate Copyright 2008 American Water Works Association. A
20、ll Rights Reserved.iv M.I. Schwartz, Loudon County Sanitation Authority, Leesburg, Va. (AWWA) J.A. Wilke, Seattle Public Utilities, Seattle, Wash. (AWWA) Copyright 2008 American Water Works Association. All Rights Reserved.v Contents All AWWA standards follow the general format indicated subsequentl
21、y. Some variations from this format may be found in a particular standard. Foreword I Introduction vii I.A Background. vii I.B History vii I.C Acceptance vii II Special Issues viii II.A Advisory Information on Product Application viii II.B Venting viii II.C Throttling and Slow-Closing Devices ix II.
22、D Pipeline Water Column Separation Protection . ix 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 1 1.3 Application. 2 2 References 2 3 Definitions 3 4 Requiremen
23、ts 4.1 Data to Be Provided by Manufacturer or Supplier . 4 4.2 Materials 4 4.3 General Design and Detailed Design Requirements 6 4.4 Workmanship and Painting 8 5 Verification 5.1 Testing . 8 5.2 Inspection 9 5.3 Rejection 10 6 Delivery 6.1 Marking . 10 6.2 Preparation for Shipment . 10 6.3 Affidavit
24、 of Compliance . 10 SEC. PAGE SEC. PAGE Copyright 2008 American Water Works Association. All Rights Reserved.This page intentionally blank. Copyright 2008 American Water Works Association. All Rights Reserved.vii Foreword This foreword is for information only and is not a part of AWWA C512. Introduc
25、tion I. Background. I.A. This standard describes three types of air valves: air-release valves, air/vacuum valves, and combination air valves. Air-release valves, also called small-orifice valves, are designed to automatically 1. release small pockets of accumulated air from a pipeline while the sys
26、tem operates un- der pressure exceeding atmospheric pressure. Air/vacuum valves, also called large-orifice valves, are designed to exhaust 2. large quantities of air automatically during pipeline filling and to admit large quanti- ties of air automatically when the internal pressure in the pipeline
27、drops below atmo- spheric pressure. Combination air valves are designed to perform the same function as air/vac- 3. uum valves but, in addition, they will automatically release small pockets of air from the pipeline while under pressure, like an air-release valve. History I.B. . The AWWA Standards C
28、ommittee on Waterworks Air -Release Valves was authorized on Nov. 17, 1984, to respond to a request for a standard on air valves. The first edition of this standard, AWWA/ANSI C512, was approved by the AWWA Board of Directors on Jan. 26, 1992, the second edition on June 20, 1999, and the third editi
29、on on June 13, 2004. This edition was approved on June 24, 2007. Acceptance I.C. . In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certificatio
30、n program for direct and indirect drinking water additives. Other members of the original consortium included the American Water Works Association Research Foundation (AwwaRF) and the Conference of State Health and Environmental Managers (COSHEM). The American Water Works Association (AWWA) and the
31、Association of State Drinking Water Administrators (ASDWA) joined later. In the United States, authority to regulate products for use in, 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
32、. To evaluate the health effects of products and drinking water additives from such products, state and local * Persons outside the United States should contact the appropriate authority having jurisdiction. Copyright 2008 American Water Works Association. All Rights Reserved.viii agencies may use v
33、arious references, including An advisory program formerly administered by USEPA, Office of Drinking 1. Water, discontinued on Apr. 7, 1990. Specific policies of the state or local agency. 2. Two standards developed under the direction of NSF, NSF 3. * /ANSI 60, Drinking Water Treatment ChemicalsHeal
34、th Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. Other references, including AWWA standards, 4. Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agenc y. Various certification organizations may be involved in ce
35、rtifying products in accordance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdiction. Accreditation of certification organizations may vary from jurisdiction to jurisdiction. Annex A, “Toxicology Review and E
36、valuation Procedures,” to NSF/ANSI 61 does not stipulate a maximum allowable level (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 (noncarcinog
37、ens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. AWWA/ANSI C512 does not address additives requirements. Users of this standard should consult the appropriate state or local agency having jurisdiction in orde
38、r to Determine additives requirements, including applicable standards. 1. Determine the status of certifications by parties offering to certify products for 2. contact with, or treatment of, drinking water. Determine current information on product certification. 3. Special Issues. II. Advisory Infor
39、mation on Product Application. II.A. For additional guidance regarding selecting, sizing, locating, and installing air-release, air/vacuum, and combination air valves, see AWWA Manual M51, Air-Release, Air/Vacuum, & Combination Air Valves. Venting II.B. . When selecting types of valves, it must be n
40、oted that air/vacuum * NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105. American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Both publications available from National Academy of Sciences, 500 Fifth Street NW, Washington, DC 20001. Copyright 2008 A
41、merican Water Works Association. All Rights Reserved.ix valves, once closed, will not reopen to vent air while a pipeline is full and under pressure. To vent air from a pipeline under pressure, an air-release valve or combination air valve is required. Throttling and Slow-Closing Devices. II.C. When
42、 air/vacuum or combination valves are used where pressure surges can occur, such as on the discharge of vertical turbine deep-well pumps, a throttling device or slow-closing device option should be considered. Pipeline Water Column Separation Protection. II.D. On pipeline applications where water co
43、lumn separations may occur, a vacuum breaker with air-release valve or an air valve with restricted outflow should be considered.Use of This Standard. III. 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 p
44、articular application being considered. Purchaser Options and Alternatives. III.A. This standard includes certain options and alternatives, summarized in the following list, that the purchaser should designate when purchasing valves described in this standard. The purchaser should review each item a
45、nd make appropriate provisions in specifications to stipulate additional requirements. The following items should be provided by the purchaser: Standard usedthat is, AWWA/ANSI C512, Air-Release, Air/Vacuum, and 1. Combination Air Valves for Waterworks Service, of latest revision. Valve size. 2. Maxi
46、mum working pressure of each valve. 3. Quantity required. 4. Type of installation (underground, in-plant, in-vault, or outdoor). 5. Warranty statement, if other than manufacturers standard warranty. 6. Whether compliance with NSF/ANSI 61, Drinking Water System Components 7. Health Effects, is requir
47、ed. Valve type, air-release valve, air/vacuum, or combination air valve (Section 3). 8. Catalog data, if specified (Sec. 4.1.1). 9. Certified drawings, if specified (Sec. 4.1.2). 10. Operating manual, if specified (Sec. 4.1.3). 11. Details of other federal, state or provincial, and local requirement
48、s 12. (Sec. 4.2.1). Body inlet configuration, threaded or flanged (Sec. 4.3.2.1). 13. Valve material of construction (Sec. 4.3.2.1.1 and 4.3.2.9). 14. Flanges, if other than flat-faced (Sec. 4.3.2.2.1). 15. Copyright 2008 American Water Works Association. All Rights Reserved.x Cover outlet configura
49、tion, threaded, flanged, or hooded (Sec. 4.3.2.10). 16. Whether an adjustable throttling device is required on the valve out- 17. let and whether the device must provide full-size flow area in the reverse direction (Sec. 4.3.3). Whether a slow-closing device is required on the valve inlet (Sec. 4.3.4). 18. Internal protective coating, if specified (Sec. 4.4.2.2). 19. Special external protective coatings, if other than the manufacturers stan- 20. dard primer (Sec. 4.4.2.3). Records of tests, if specified (Section 5). 21. Lower test pressure, if specified (
