1、 AWWA Standard SM Cold-Water Meters Multijet Type Effective date: Apr. 1, 2015. First edition approved by AWWA Board of Directors Jan. 20, 1976. This edition approved Jan. 24, 2015. Approved by American National Standards Institute Oct. 16, 2014. ANSI/AWWA C708-15 (Revision of ANSI/AWWA C708-11) Cop
2、yright 2014 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 and administrative information n
3、ormally 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- lication of a standard does not constitute endorsement of a
4、ny 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. AWWA standards are intended to
5、 represent a consensus of the water supply 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 - American Water Works Association. The action becomes
6、 effective on the first day of the month fol- lowing 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 substantially concerned with its scope and provisions. An American Na
7、tional Standard is intended as a guide to 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 ap - proved the standard or not, from manufacturing, marketing, purchasing, or using p
8、roducts, processes, or procedures not conforming 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 encour - aged to state on their own respon
9、sibility 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 date on the front cover of this standard indicates completion of
10、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 ANSI approval. Purchasers of American National Standards may recei
11、ve 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. ISBN-13, print: 978-1-62576-057-9 eISBN-13, electronic: 978-1-61300-319-0DOI: http:/dx.doi.org/10.12
12、999/AWWA.C708.15 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 in the form of brief excerpts or quotations for review purposes, wi
13、thout the written permission of the publisher. Copyright 2015 by American Water Works Association Printed in USA hours of work by your fellow water professionals. Revenue from the sales of this AWWA material supports ongoing product development. Unauthorized distribution, either electronic or photoc
14、opied, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of Copyright 2014 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Subcommittee on Multijet Vane- T ype Meters, which reviewed, developed,
15、and approved this revision of AWWA C708, had the following personnel at that time: John H. Standi Jr., Chair M.L. Aigen, Boston Water and Sewer Commission, Roxbury, Mass. (NEWWA) R.A. Barillas, Badger Meter, Milwaukee, Wis. (AWWA) G.H. De Jarlais, Badger Meter, Milwaukee, Wis. (AWWA) A. Dudley, Itro
16、n, West Union, S.C. (AWWA) L. Gregory, RG3 Meter Company, Longview, Texas (AWWA) A. Hendey Sr., Hendey Meter, Beaumont, Calif. (AWWA) M.C. Johnson, Utah State University, Logan, Utah (AWWA) T.A. Kelly Jr., Washington Suburban Sanitary Commission, Laurel, Md. (AWWA) R.N. Koch, Master Meter Inc., Pitt
17、sburgh, Pa. (AWWA) D. Lee, HD Supply Waterworks, Morrisville, N.C. (AWWA) S. Pagley, Town of Kure Beach Public Works Department, Kure Beach, N.C. (AWWA) J. Pintok, RG3 Meter Company, Sanford, Fla. (AWWA) J.A. Reiss, Elster AMCO Water LLC, Ocala, Fla. (AWWA) T. Smith, Sensus, Raleigh, N.C. (AWWA) J.H
18、. Standi Jr., Golden State Water Company, Fontana, Calif. (AWWA) S.M. Swanson, Sensus, Uniontown, Pa. (AWWA) W.J. Vetter, Master Meter Inc., Mansfield, Texas (AWWA) A.M. Watson, Elster AMCO Water LLC, Ocala, Fla. (AWWA) The AWWA Standards Committee on Water Meters, which reviewed and approved this r
19、evision, had the following personnel at the time of approval: Thomas A. Kelly Jr., Chair Michael L. Mastic, Secretary General Interest Members D. Faber, Faber the basic principle of this meter is to design it in such a manner that, over the working range of the instrument, the speed of rotation of t
20、he rotor bears a linear relationship to the velocity of flow through the meter. In multijet meters, the moving element takes the form of a multiblade rotor mounted on a vertical spindle within a cylindrical measuring chamber. The liquid enters the measuring chamber through several tangential orifice
21、s around the circum- ference and leaves the measuring chamber through another set of tangential orifices placed at a different level in the measuring chamber. I.B. History. Advances made in the development of nonmetallic materials for water meter construction have been recognized in the materials se
22、ction of this standard. Several plastic materials are currently being used successfully for meter components. Several suitable plastic materials are included in this revision. The first edition of the standard was approved by the AWWA Board of Direc - tors on June 20, 1976. Subsequent editions of th
23、is standard were approved on Feb. 1, 1982; Jan. 27, 1991; June 23, 1996; Jan. 16, 2005; and June 12, 2011. This edition was approved on Jan. 24, 2015. I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF Intern
24、ational (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 Research Foundation (formerly AwwaRF) and the Conference of State Health and Environmental Mana
25、gers (COSHEM). The * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 2014 American Water Works Association. All Rights Reserved. x American Water Works Association (AWWA) and the Association of State Drinking Water Administrators (ASDWA) joined
26、 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. To evaluate the health effects of products and drinking water a
27、dditives from such products, state and local agencies may use various references, including 1. An advisory program formerly administered by USEPA, Office of Drinking Water, discontinued on Apr. 7, 1990. 2. Specific policies of the state or local agency. 3. Two standards developed under the direction
28、 of NSF : NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. 4. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agenc
29、y. Various certification organizations may be involved in certifying products in accor- dance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certi- fication organizations may vary fro
30、m jurisdiction to 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 co
31、ntaminants” are 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. In an alternative approach to inadvertent drinking water additives, some jurisdic- tions (incl
32、uding California, Louisiana, Maryland, and Vermont, at the time of this writing) are calling for reduced lead limits for materials in contact with potable water. Various third-party certifiers have been assessing products against these lead content criteria, and a new ANSI-approved national standard
33、, NSF/ANSI 372, Drinking Water System ComponentsLead Content, was published in 2010. * Persons outside the United States should contact the appropriate authority having jurisdiction. NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. Both publications available from National Academy of Sciences, 500 Fifth Street NW, Washington, DC 20001. Copyright 2014 American Water Works Association. All Rights Reserved.
