1、ANSI/AWWA C507-18 (Revision of ANSI/AWWA C507-15) AWWA Standard SM Ball Valves, 6 In. Through 60 In. (150 mm Through 1,500 mm) Effective date: August 1, 2018. First edition approved by AWWA Board of Directors Sept. 14, 1973. This edition approved Jan. 20, 2018. Approved by American National Standard
2、s Institute Feb. 14, 2018. Copyright 2018 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 contain all of the engineering an
3、d 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 publication of a standard does not
4、 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 any governmental authority. AW
5、WA standards are intended to represent a consensus of the water industry that the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be placed in the Official Notice section of Journal AWWA. The action becomes effectiv
6、e on the first day of the month following the month 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
7、 aid the manufacturer, the consumer, and the general 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 confor
8、ming to the standard. American National Standards are 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 materia
9、ls or on tags or labels that the goods are produced in conformity with particular American National Standards. Caution Notice : 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
10、 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 ANSI approval. Purchasers of American National Standards may receive current information on all standards by callin
11、g or writing the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; (212) 642-4900, or e-mailing infoansi.org. ISBN-13, print: 978-1-62576-298-6 eISBN-13, electronic: 978-1-61300-479-1DOI: http:/dx.doi.org/10.12999/AWWA.C507.18 All rights reserved. No part
12、of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including scanning, recording, or any information or retrieval system. Reproduction and commercial use of this material is prohibited, except with written permission from the publisher. Copyri
13、ght 2018 by American Water Works Association Printed in USA If you are interested in using any part of this publication for training, creating a derivative work, or for any commercial use, written permission from AWWA is required. Please send your request to permissionsawwa.org. Copyright 2018 Ameri
14、can Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Ball Valves, which reviewed and approved this standard, had the following personnel at the time of approval: Steve Carpenter, Chair General Interest Members M.L. Altland, Mot MacDonald, Iselin,
15、N.J. M.D. Bennett, Stantec, Cleveland, Ohio B.E. Bosserman, Consultant, Mission Viejo, Calif. F .L. Hinker, Consulting Engineer, Santa Rosa, N.Mex. M.B. Horsley, Horsley Engineering LLC, Overland Park, Kans. C.H. Kirby, Lockwood, Andrews Jan. 24, 1999; Jan. 16, 2005; and Jan. 23, 2011. The 2015 edit
16、ion of ANSI/AWWA C507 added updated actuator requirements and was approved on Jan. 24, 2015. This edition was approved on Jan. 20, 2018. I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF)
17、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 Research Foundation (formerly AwwaRF) and the Conference of State Health and Environmental Managers (COSHEM).
18、 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, or in contact with, drinking water rests with individual states. Local agencies may choose to impose requirem
19、ents 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 references, including 1. Specific policies of the state, provincial, or local agency. * American National Standar
20、ds Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Persons outside the United States should contact the appropriate authority having jurisdiction. Copyright 2018 American Water Works Association. All Rights Reserved. viii 2. Two standards developed under the direction of NSF * : NS
21、F/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. 3. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agency. Various c
22、ertification organizations may be involved in certifying products in accordance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certification organizations may vary from jurisdiction t
23、o jurisdiction. Annex A, “Toxicology Review and Evaluation 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
24、based on toxicity testing guidelines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. ANSI/A WWA C507 does not address additives requirements. Users of this standard should consult the appropriate
25、 state, provincial, or local agency having jurisdiction in order to 1. Determine additives requirements, including applicable standards. 2. Determine the status of certifications by parties offering to certify products for contact with, or treatment of, drinking water. 3. Determine current informati
26、on on product certification. To minimize inadvertent drinking water additives, some jurisdictions (including California, Maryland, Vermont, and Louisiana, at the time of this writing) are calling for reduced lead limits for materials in contact with potable water. Various third- party certifiers hav
27、e been assessing products against these lead content criteria, and a new ANSI-approved national standard, NSF/ANSI 372, Drinking Water System ComponentsLead Content, was published in 2010. On Jan. 4, 2011, legislation was signed revising the definition for “lead free” within the Safe Drinking Water
28、Act (SDWA) as it pertains to “pipe, pipe fittings, plumbing fittings, and fixtures.” The changes went into effect on Jan. 4, 2014. In brief, the new * NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. Both publications available from The National Academies Press, 500 Fifth Street NW, K
29、eck 360, Washington, DC 20001. Copyright 2018 American Water Works Association. All Rights Reserved. ix provisions to the SDWA require that these products meet a weighted average lead content of not more than 0.25 percent. II. Special Issues. II.A. General. The actuating forces required to operate a
30、 ball valve of a given size vary considerably and depend on the size of the valve, the differential operating pressure, the quantity of water flow, the configuration of waterway passages, and the seal design used. This standard covers the design of these valves and their actuators operating at a max
31、imum differential pressure equal to or less than the design pressure and a maximum full-open port fluid velocity of 35 ft/s (10.7 m/s). Ball valves capable of operating under pressurevelocity conditions exceeding those found in this standard are available but are outside the scope of this standard.
32、Fluid port velocities greater than 35 ft/s (10.7 m/s) have a higher probability of causing cavitation in piping systems, especially if valves are used to throttle flows. The 35-ft/s (10.7-m/s) port fluid velocity is not an upper limit to the flow that can be satisfactorily handled by ball valves. Pi
33、ping systems capable of producing higher velocities should be studied by the system owner, system designer, or purchaser and manufacturer to ensure the most appropriate valve selection. II.B. Considerations for Throttling Service. If a valve is to be installed for throttling service, the system owne
34、r, system designer, or purchaser must carefully evaluate the full range of differential pressures across the valve versus the downstream pressures in order to avoid damage by cavitation. Differential pressures across the valve versus downstream pressures for all angles of the ball, together with the
35、 hydraulic characteristics of the valve, must be determined and evaluated to ensure a successful installation. See AWWA Manual M49 for further explanation and information. II.C. Valve and Piping Supports. To maintain the integrity of the valve, it is important to avoid subjecting the valve to pipe l
36、oads or external loads that drive the valve out of round, such as the use of valve foundations or supports without proper pipe supports. The valve should be supported independently of the adjacent piping, and the adjacent piping should be supported independently of the valve. Piping to and from the
37、valve should be adequately supported and controlled. Valve inlet and outlet piping should be supported as near to the valve as practical. This arrangement removes most of the static load and allows identification of piping fit problems during installation and easier removal of the valve for maintenance. Design considerations should include allowable flange loadings, thermal expansion and contraction, and differential settlement. Copyright 2018 American Water Works Association. All Rights Reserved.
