1、 AWWA Standard SM Cold-Water Meters Singlejet Type Effective date: Apr. 1, 2015. First edition approved by AWWA Board of Directors Jan 20, 2002. This edition approved Jan. 24, 2015. Approved by American National Standards Institute Oct. 20, 2014. ANSI/AWWA C712-15 (Revision of ANSI/AWWA C712-10) Cop
2、yright 2015 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: 978-1-62576-059-3 eISBN-13, electronic: 978-1-61300-321-3DOI: http:/dx.doi.org/10.12
12、999/AWWA.C712.15 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 2015 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Subcommittee on Singlejet Meters, which developed this standard, had the
15、 following personnel at the time of approval: Mark L. Aigen, Chair M.L. Aigen, Boston Water and Sewer Commission, Roxbury, Mass. (NEWWA) R.A. Barillas, Badger Meter, Milwaukee, Wis. (AWWA) D. Casper, Mueller Systems, Cleveland, S.C. (AWWA) G.H. De Jarlais, Badger Meter, Milwaukee, Wis. (AWWA) A. Dud
16、ley, Itron, West Union, S.C. (AWWA) W.F. Dunnill, Consolidated Utility District of Rutherford County, Murfreesboro, Tenn. (AWWA) M.C. Johnson, Utah State University, Logan, Utah (AWWA) R.N. Koch, Master Meter Inc., Pittsburgh, Pa. (AWWA) D.J. Kullmann, Neptune Technology Group Inc., Marietta, Ga. (A
17、WWA) M. Laird, MetronFarnier LLC, Boulder, Colo. (AWWA) J.A. Reiss, Elster AMCO Water LLC, Ocala, Fla. (AWWA) F.S. Salser Jr., Floyd S. Salser Jr. & Assoc. MARS Company, Ocala, Fla. (AWWA) J.R. Scarborough III, Neptune Technology Group Inc., Tallassee, Ala. (AWWA) M. Shamley, MetronFarnier LLC, Boul
18、der, Colo. (AWWA) T. Smith, Sensus, Raleigh, N.C. (AWWA) S.M. Swanson, Sensus, Uniontown, Pa. (AWWA) M.A. Thomas, Mueller Systems, Cleveland, S.C. (AWWA) M.D. Westrich, Blend-Rite Industries Inc., Bloomfield, N.J. (AWWA) W.J. Vetter, Master Meter Inc., Mansfield, Texas (AWWA) A.M. Watson, Elster AMC
19、O Water LLC, Ocala, Fla. (AWWA) Th e AWWA Standards Committee on Water Meters, which reviewed and approved this standard, had the following personnel at the time of approval: Thomas A. Kelly Jr., Chair Michael L. Mastic, Secretary General Interest Members D. Faber, Faber & Associates, Columbus, Ind.
20、 (AWWA) R.C. Graff, Poway, Calif. (AWWA) Copyright 2015 American Water Works Association. All Rights Reserved. iv D.E. Hood, M.E. Simpson Company Inc., Valparaiso, Ind. (AWWA) M.C. Johnson, Utah State University, Logan, Utah (AWWA) M.J. Kebles, Water Industry Consultant, Las Vegas, Nev. (AWWA) F.S.
21、Kurtz,* Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) M.L. Mastic, MARS Company, Ocala, Fla. (AWWA) R.A. Richter, National Institute of Standards and Technology, Gaithersburg, Md. (AWWA) F.S. Salser Jr., Floyd S. Salser Jr. & Associates MARS Company, Ocala, Fla. (AWWA) R. San Giacomo, R & D
22、 Engineering P.C., Orchard Park, N.Y. (AWWA) J.A. Welsh, Measurement Canada, Ottawa, Ont., Canada (AWWA) Producer Members F.J. Begale, Badger Meter, Milwaukee, Wis. (AWWA) T.D. Bianchi, Neptune Technology Group Inc., Tallassee, Ala. (AWWA) D. Casper, Mueller Systems, Cleveland, S.C. (AWWA) G.H. De J
23、arlais, Badger Meter, Milwaukee, Wis. (AWWA) A. Dudley, Itron, West Union, S.C. (AWWA) L. Gregory, RG3 Meter Company Inc., Longview, Texas (AWWA) A. Hendey Sr., Hendey Meter, Beaumont, Calif. (AWWA) M.J. Keilty, Endress + Hauser Flowtec AG, Estes Park, Colo. (AWWA) R.N. Koch, Master Meter Inc., Pitt
24、sburgh, Pa. (AWWA) D.J. Kullmann, Neptune Technology Group Inc., Marietta, Ga. (AWWA) M. Laird, Metron-Farnier LLC, Boulder, Colo. (AWWA) J. Panek Jr., McCrometer Inc., Rowley, Iowa (AWWA) J. Pintok, RG3 Meter Company Inc., Sanford, Fla. (AWWA) J.A. Reiss, Elster AMCO Water LLC, Ocala, Fla. (AWWA) M
25、. Shamley, Metron-Farnier LLC, Boulder, Colo. (AWWA) T. Smith, Sensus, Raleigh, N.C. (AWWA) S.M. Swanson, Sensus, Uniontown, Pa. (AWWA) M.A. Thomas, Mueller Systems, Cleveland, N.C. (AWWA) W.J. Vetter, Master Meter Inc., Mansfield, Texas (AWWA) G.M. Voss, McCrometer Inc., Hemet, Calif. (AWWA) A.M. W
26、atson, Elster AMCO Water LLC, Ocala, Fla. (AWWA) * Liaison, nonvoting Alternate Copyright 2015 American Water Works Association. All Rights Reserved. v User Members M.L. Aigen, Boston Water and Sewer Commission, Roxbury, Mass. (NEWWA) J. Alongi, Kansas City Water Services Department, Kansas City, Mo
27、. (AWWA) M.J. Aragon, Denver Water, Denver, Colo. (AWWA) M.C. Bowen, City of Columbus, Division of Water, Columbus, Ohio (AWWA) W.F. Dunnill, Consolidated Utility District of Rutherford County, Murfreesboro, Tenn. (AWWA) W.M. Garfield, Arizona Water Company, Phoenix, Ariz. (AWWA) D. Griffin, City of
28、 Winnipeg Water and Waste Department, Winnipeg, Man., Canada (AWWA) P.A. Hayes, Mammoth Community Water District, Mammoth Lakes, Calif. (AWWA) N.D. Kaufman, Truckee Donner Public Utility District, Truckee, Calif. (AWWA) T.A. Kelly Jr., Washington Suburban Sanitary Commission, Laurel, Md. (AWWA) M.S.
29、 Krause, Desert Water Agency, Palm Springs, Calif. (AWWA) A. Land, Dallas Water Utilities, Dallas, Texas (AWWA) S.U. Mills-Wright,* Standards Council Liaison, City of Arlington, Arlington, Texas (AWWA) K.C. Molli, Veolia Water North America, Chicago, Ill. (AWWA) J.A. Novak, Milwaukee Water Works, Mi
30、lwaukee, Wis. (AWWA) J.H. Standi Jr., Golden State Water Company, Fontana, Calif. (AWWA) * Liaison, nonvoting Copyright 2015 American Water Works Association. All Rights Reserved. This page intentionally blank. Copyright 2015 American Water Works Association. All Rights Reserved. vii Contents All AW
31、WA 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 . ix I.A Background ix I.B History . ix I.C Acceptance x II Special Issues. . xi II.A Fire Flow xi III Use of This Standa
32、rd xi III.A Purchaser Options and Alternatives xi III.B Modification to Standard xii IV Major Revisions . xii V Comments . xiii Standard 1 General 1.1 Scope 1 1.2 Purpose . 1 1.3 Application 1 2 References 2 3 Definitions . 3 4 Requirements 4.1 Materials . 4 4.2 General Design . 7 4.3 Detailed Desig
33、n 9 5 Verification 5.1 Basis for Rejection . 14 6 Delivery 6.1 Marking 14 6.2 Packaging and Shipping 14 6.3 Affidavit of Compliance 14 Appendix A Supplemental Information A.1 Units of Measure . 15 A.2 Tests 15 A.3 Testing Equipment 17 A.4 Registration Accuracy . 17 A.5 Periodic Tests 19 A.6 Meter St
34、orage 20 A.7 Installation 20 Tables 1 Operating Characteristics 7 2 Meter Dimensions . 8 3 Meter ConnectionsCompanion Flange Dimensions 10 4 Maximum Indication on Initial Dial And Minimum Register Capacity 12 A.1 Most Frequently Used Interval Between Meter Tests 19 Copyright 2015 American Water Work
35、s Association. All Rights Reserved. This page intentionally blank. Copyright 2015 American Water Works Association. All Rights Reserved. ix Foreword This foreword is for information only and is not a part of ANSI*/AWWA C712. I. Introduction. I.A. Background. The subcommittee that drafted this standa
36、rd was formed in June 1998 from the AWWA Standards Committee on Water Meters. Singlejet meters have been available commercially in the United States and Canada for use in potable water applications since 1991. The singlejet type, like some class I turbine (with helical blades or flat blades) and mul
37、tijet types, is an inferential meter in which the moving element is a multibladed rotor mounted on a vertical spindle within a cylindrical cavity. The operating objective is that the speed of rotation of the rotor is linearly proportional to the velocity of water flow through the meter. The singleje
38、t-type meter has one large opening at the inlet side that gradually reduces in diameter, resulting in the water flow becoming a jet, usually integral with the main case that directs the water flow against the rotor. The opening is sized to achieve the above-linear speed objective. Most singlejet met
39、ers do not have a separate measuring chamber to house the rotor and jet nozzle. Also, the singlejet type differs from other meters in that it does not usually employ a valved bypass to adjust the rotor speed, as is done on many multijet and turbine-type meters. In a singlejet, rotor speed adjustment
40、s are made by either gear selection in the register or by moving the upper or lower damping vanes position relative to the rotor surfaces, thereby adjusting the fluid drag effects on rotor speed. I.B. History. Early European references to singlejet (originally called Faller) meters date back to the
41、turn of the 20th century. An early text reference can be found in an article by G. Daries, engineer for the Water Service in Paris, France, entitled “Note on Water Meters,” published in 1911, in which he questioned the early designs accuracy and longevity. These meters were used primarily in Europe
42、and Asia, where low price was of more concern than performance. In the 1950s and 1960s, some US water meter companies produced low-cost singlejet meters in relatively small numbers for the submetering and export markets. With the advent of the modern singlejet meter in the 1970s, the deficiencies in
43、 performance and durability were reduced from the earlier designs of singlejet meters. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 2015 American Water Works Association. All Rights Reserved. x The first edition of ANSI/AWWA C712 was appro
44、ved by the AWWA Board of Directors on Jan. 20, 2002. The second edition was approved Jan. 17, 2010. This edi - tion was approved 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 International
45、 (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 Managers (C
46、OSHEM). 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
47、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 references, including 1. An advisory program formerly administered by USEPA, Office of Drinking Water, di
48、scontinued on Apr. 7, 1990. 2. Specific policies of the state or local agency. 3. 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. 4. Other references, including AWWA st
49、andards, 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 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 stipulat
