1、ANSI/AWWA B504-18 (Revision of ANSI/AWWA B504-12) AWWA Standard SM Monosodium Phosphate, Anhydrous and Liquid Effective date: July 1, 2018. First edition approved by AWWA Board of Directors Jan. 25, 1988. This edition approved Jan. 20, 2018. Approved by American National Standards Institute Feb. 27,
2、 2018. Copyright 2018 American Water Works Association. All Rights Reserved. ii 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.
3、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 usually contai
4、n 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, or approve any
5、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 represent a consensus of the water industry that the product described
6、will provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be in the Official Notice section of Journal - American Water Works Association. The action becomes effective on the first day of the month following the month of Journal AWWA publicati
7、on 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 public. The existence of
8、 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 are subject to periodic rev
9、iew, 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 in conformity with part
10、icular 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 Standard may be revised or withdrawn at any time. ANSI procedures require
11、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 calling or writing the American National Standards Institute, 25 West 43rd Street
12、, Fourth Floor, New York, NY 10036; (212) 642-4900, or emailing infoansi.org. ISBN-13, print: 978-1-62576-295-5 eISBN-13, electronic: 978-1-61300-476-0DOI: http:/dx.doi.org/10.12999/AWWA.B504.18 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any m
13、eans, 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. Copyright 2018 by American Water Works Association Printed in USA Copyright 2018 A
14、merican Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Scale and Corrosion-Control Chemicals, which reviewed and approved this standard, had the following personnel at the time of approval: Robert A. Ryder, Chair General Interest Members N.J. Ed
15、man, *Standards Group Liaison, AWWA, Denver, Colo. E.H. Leung, *California State Water Board, Richmond, Calif. N.E. McTigue, EE & T, Inc., Newport News, Va. D. Orozco, Robert Cole & Associates Engineers, Safety Harbor, Fla. R.A. Ryder, Kennedy/Jenks Consultants, San Francisco, Calif. R.D. Vaidya, Ch
16、astain Skillman, Inc., Lakeland, Fla. Producer Members H.T. Belcher Jr., Corrtrac Systems Corporation, Currituck, N.C. C.P . Principi, Carus Corporation, Belmont, N.C. H. Stiefel, Aqua Smart, Inc., Atlanta, Ga. User Members D.M. Lafalam, City of Worcester Water Filtration Plant, Holden, Mass. J.D. M
17、usinski, Village of Arlington Heights, Arlington Heights, Ill. R.M. Powell, Pinellas County Utilities, Spring Hill, Fla. Y. Zhang, Long Beach Water Department, Long Beach, Calif. * Liaison, nonvoting. Copyright 2018 American Water Works Association. All Rights Reserved. This page intentionally blank
18、. Copyright 2018 American Water Works Association. All Rights Reserved. v Foreword I Introduction. . vii I.A Background . vii I.B History vii I.C Acceptance vii II Special Issues. viii II.A Storage and Handling Precautions viii III Use of This Standard . ix III.A Purchaser Options and Alternatives .
19、 ix III.B Modification to Standard ix IV Major Revisions . ix V Comments x Standard 1 General 1.1 Scope. 1 1.2 Purpose . 1 1.3 Application 1 2 References 2 3 Definitions . 2 4 Requirements 4.1 Physical Requirements . 3 4.2 Chemical Requirements 3 4.3 Impurities 4 5 Verification 5.1 Sampling . 4 5.2
20、Test Procedures 6 5.3 Notice of Nonconformance . 7 6 Delivery 6.1 Marking 8 6.2 Packaging and Shipping 8 6.3 Affidavit of Compliance or Certified Analysis 9 Table 1 Sample Size Determination for Orthophosphate Analysis 6Contents All AWWA standards follow the general format indicated subsequently. So
21、me variations from this format may be found in a particular standard. SEC. PAGE SEC. PAGE Copyright 2018 American Water Works Association. All Rights Reserved. This page intentionally blank. Copyright 2018 American Water Works Association. All Rights Reserved. vii Foreword This Foreword is for infor
22、mation only and is not a part of ANSI*/AWWA Standard B504. I. Introduction. I.A. Background. Phosphate chemicals are among the few recognized substances that can be safely and effectively used in water for corrosion inhibitor treatment. There are several phosphate technologies available, one of whic
23、h is monosodium phosphate (NaH 2 PO 4 ). Monosodium phosphate is a manufactured product obtained by combining a comparatively pure chemical, soda ash (Na 2 CO 3 ) or caustic soda (NaOH, sodium hydroxide), with phosphoric acid (H 3 PO 4 ). Monosodium phosphate, anhydrous, is a white, crystalline soli
24、d, commercially available in granular and powder forms. Monosodium phosphate is also found as a clear liquid and is soluble in water. A solution of 1 lb/gal (0.12 kg/L, 34 percent by weight) has a specific gravity of approximately 1.30 at 20C (70F). For information on safety, refer to safety data sh
25、eets available from the supplier or manufacturer. I.B. History. In 1985, the AWWA Standards Committee on Scale and Corrosion-Control Chemicals recognized the need for a standard for monosodium phosphate, anhydrous and liquid, used as a corrosion-control product in the treatment of potable water. The
26、 AWWA Standards Council authorized development of this standard on Nov. 18, 1985, and the first edition was approved on Jan. 25, 1988. Subsequent editions were approved by the AWWA Board of Directors on June 19, 1994, Jan. 21, 2001, June 12, 2005, and Jan. 22, 2012. This edition was approved on Jan.
27、 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) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additi
28、ves. 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 Water Works Association and the Association of State Drinking
29、Water Administrators (ASDWA) joined later. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 2018 American Water Works Association. All Rights Reserved. viii In the United States, authority to regulate products for use in, or in contact with, d
30、rinking 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 additives from such products, state and local agencies may use various references, including tw
31、o standards developed under the direction of NSF , NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. Various certification organizations may be involved in certifying products in accordance with NSF/ANSI 60. Individual stat
32、es 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 Evaluation Procedures,” to NSF/ANSI 60 does not stipulate a maximu
33、m 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 (noncarcinogens) and risk characterization methodology (carcinogens). Use of
34、Annex A procedures may not always be identical, depending on the certifier. The maximum concentration limit in drinking water varies by producer. ANSI/AWWA B504 addresses additives requirements in Sec. 4.3 of the standard. The transfer of contaminants from chemicals to processed water or to the resi
35、dual solids is becoming a problem of great concern. The language in Sec. 4.3.3 is a recommendation only for direct additives used in the treatment of potable water to be certified by an accredited certification organization in accordance with NSF/ANSI 60. However, users of the standard may opt to ma
36、ke this certification a requirement for the product. Users of this standard should also consult the appropriate state 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
37、certify products for contact with, or treatment of, drinking water. 3. Determine current information on product certification. II. Special Issues. II.A. Storage and Handling Precautions. Monosodium phosphate, anhydrous, is slightly deliquescent in nature and must be stored under dry conditions. Expo
38、sure to * Persons outside the United States should contact the appropriate authority having jurisdiction. NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 2018 American Water Works
39、Association. All Rights Reserved. ix humidity produces a caked condition. This results in poor flow and caking that interferes with the rate of dilution. Liquid monosodium phosphate is considered nonhazardous. However, because the pH is between 4 and 5, handle as an acidic solution. Store in polyeth
40、ylene, fiberglass reinforced plastic, epoxy, rubber-lined mild steel, or stainless- steel containers in a cool, dry area. Protect containers from physical damage and freezing. Refer to the material safety data sheets available from the manufacturer or supplier for additional information. III. Use of
41、 This Standard. 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 particular application being considered. III.A. Purchaser Options and Alternatives. The following information should be provided by the purch
42、aser: 1. Standard usedthat is, ANSI/AWWA B504, Monosodium Phosphate, Anhydrous and Liquid, of latest revision. 2. Whether compliance with NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects, is required. 3. Details of federal, state, and local requirements (Sec. 4). 4. Physical form(s) and
43、 quantity (Sec. 4.1.1 and Sec. 4.1.2). 5. Specific maximum impurity content limits, if required (Sec. 4.3). 6. Whether the purchaser will reject product from containers or packaging with missing or damaged seals. The purchaser may reject product from bulk containers or packages with missing or damag
44、ed seals unless the purchasers tests of representative samples, conducted in accordance with Sec. 5.2, demonstrate that the product meets the standard. Failure to meet the standard or the absence of, or irregularities in, seals may be sufficient cause to reject the shipment. 7. Form of shipmentbulk
45、or package, type, and size of container (Sec. 6.2). 8. Whether alternative security measures have been adopted to replace or augment the security measures set out in Sec. 6.2.3 and Sec. 6.2.4. 9. Affidavit of compliance or certified analysis, or both, if required (Sec. 6.3). III.B. Modification to S
46、tandard. Any modification to the provisions, definitions, or terminology in this standard must be provided by the purchaser. IV. Major Revisions. Major changes made to the standard in this revision include the following: 1. Removal of T est procedure for P 2 O 5content (Sec. 5.2.3) 2. Revision of th
47、e Notice of Nonconformance (Sec. 5.3) 3. Revision to Alternative method wording (Sec. 6.2.4.3) Copyright 2018 American Water Works Association. All Rights Reserved. x V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering & Technical Services at 303.794.
48、7711, FAX at 303.795.7603, write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098, or e-mail at standardsawwa.org. Copyright 2018 American Water Works Association. All Rights Reserved. 1 Monosodium Phosphate, Anhydrous and Liquid SECTION 1: GENERAL Sec. 1.1 Scope This standard des
49、cribes monosodium phosphate, anhydrous and liquid, for use in the treatment of potable water, wastewater, and reclaimed water. The product described is an orthophosphate used as formulated and in blends to inhibit corrosion of water conveyance systems. The product described by this standard is also known as sodium phosphate, monobasic, anhydrous and liquid. Sec. 1.2 Purpose The purpose of this standard is to provide the minimum requirements for monosodium phosphate, anhydrous and liquid, including physical, chemical, sampling, packaging, shipping, and
