1、 ANSI/AWWA B451-10 (Revision of ANSI/AWWA B451-04) AWWA Standard Effective date: Dec. 1, 2010. First edition approved by AWWA Board of Directors June 14, 1987. This edition approved June 20, 2010. Approved by American National Standards Institute Oct. 6, 2010. 6666 West Quincy Avenue Advocacy Denver
2、, CO 80235-3098 Communications T 800.926.7337 Conferences www.awwa.org Education and TrainingScience and TechnologySections The Authoritative Resource on Safe WaterPoly(Diallyldimethyl- ammonium Chloride) Copyright 2011 American Water Works Association. All Rights Reserved. ii AWWA Standard This doc
3、ument 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 specifi- cations. The AWWA standards usually contain options that must
4、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, or approve any product. The use of
5、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 the product described will provide
6、 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 of Journal AWWA publication of the
7、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 public. The existence of an Americ
8、an 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. Ameri- can National Standards are subject to periodic review, and
9、 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 in conformity with particular Ame
10、rican National Standards. Caution n oti Ce : 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 any time. ANSI procedures require that act
11、ion 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 Institute, 25 West 43rd Street, Fourth F
12、loor, New York, NY 10036; (212) 642-4900, or e-mailing infoansi.org. 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
13、brief excerpts or quotations for review purposes, without the written permission of the publisher. Copyright 2010 by American Water Works Association Printed in USA Copyright 2011 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Polyelect
14、rolytes, which developed, reviewed, and approved this standard, had the following personnel at the time of approval: Francis J. Mangravite, Chair General Interest Members P.H. Hargette, Black only laboratory testing, pilot plant studies, or full-scale plant trials can discern product efficacy. 6. Po
15、lyDADMACs manufactured in solution form may contain inactive ingredients, such as sodium chloride, depending on the manufacturing method and formulation. 7. PolyDADMACs manufactured in emulsion form contain inactive petro- leum solvents and surfactants and may also contain sodium chloride and other
16、inactive ingredients, depending on the manufacturing method and formulation. 8. PolyDADMACs manufactured in powder form may contain sodium chlo- ride and other inactive ingredients, depending on the manufacturing method and formulation. The user should consult both the material safety data sheet (MS
17、DS) and the prod- uct technical data sheet for the specific polyDADMAC product being used for infor- mation on the products composition, physical properties, safety procedures, feeding and storage guidelines, and other important information. The supplier should provide copies of the product technica
18、l data sheet along with the MSDS. I.B. History. The AWWA Standards Council authorized the development of this standard in 1979. The standard was developed by the AWWA Standards Committee on Polyelectrolytes and was approved by the AWWA Board of Directors on June 14, 1987. The second edition of the s
19、tandard was approved on June 18, 1992. The third edition of the standard was approved on Jan. 25, 1998. The fourth edition of Copyright 2011 American Water Works Association. All Rights Reserved. ix the standard was approved by the Board of Directors on June 13, 2004. This edition of the standard an
20、d was approved on June 20, 2010. I.C. Acceptance (water supply service applications). 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 certific
21、ation program for direct and indirect drinking water additives. Other members of the original consortium included the American Water Works Association Research Foundation (AwwaRF, now Water Research Foundation ) and the Conference of State Health and Environmental Managers (COSHEM). The American Wat
22、er 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 requirements more stringe
23、nt 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 two standards developed under the direction of NSF, NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Ef
24、fects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. Various certification organizations may be involved in certifying products in accor- dance with NSF/ANSI 60. Individual states or local agencies have authority to accept or accredit certification organizations within their juris
25、diction. Accreditation of certi- fication organizations may vary from jurisdiction to jurisdiction. Annex A, “Toxicology Review and Evaluation Procedures,” to NSF/ANSI 60 does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA final maximum contami
26、nant level (MCL). The MALs of an unspecified list of “unregulated contaminants” are based on toxicity testing guide- lines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. ANSI/AWWA B451 addresses
27、 additives requirements in Sec. 4.3 of the standard. The transfer of contaminants from chemicals to processed water or the residual solids is becoming a problem of great concern. The language in Sec. 4.3 is a recommenda- tion only for direct additives used in the treatment of potable water to be cer
28、tified by an accredited certification organization in accordance with NSF/ANSI 60, Drinking * NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. Water Research Foundation, 6666 W. Quincy Avenue, Denver, CO 80235. Persons outside the United States should contact the appropriate authority having jurisdiction. Copyright 2011 American Water Works Association. All Rights Reserved.
