1、AWWA Standard SM Sodium Polyphosphate, Glassy (Sodium Hexametaphosphate) Effective date: Sept. 1, 2017. First edition approved by AWWA Board of Directors June 1, 1967. This edition approved June 11, 2017. Approved by American National Standards Institute June 16, 2017. ANSI/AWWA B502-17 (Revision of
2、 ANSI/AWWA B502-11) Copyright 2017 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 admin
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12、of this AWWA material supports ongoing product development. Unauthorized distribution, either electronic or photocopied, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of ISBN-13, print: 978-1-62576-256-6 eISBN-13, electronic: 978-1
13、-61300-443-2 DOI:http:/dx.doi.org/10.12999/AWWA.B502.17 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 excerpt
14、s or quotations for review purposes, without the written permission of the publisher. Copyright 2017 by American Water Works Association Printed in USAiii Committee Personnel The AWWA Standards Committee on Scale and Corrosion-Control Chemicals, which reviewed and approved this standard, had the fol
15、lowing personnel at the time of approval: Robert A. Ryder, Chair General Interest Members E. Leung,* California State Water Board, Richmond, Calif. (AWWA) M.S. McFadden, HDR Engineering Inc., Denver, Colo. (AWWA) N.E. McTigue, EE write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3
16、098; or email at standardsawwa.org. Copyright 2017 American Water Works Association. All Rights Reserved. This page intentionally blank.1 AWWA Standard ANSI/AWWA B502-17 (Revision of ANSI/AWWA B502-11) Sodium Polyphosphate, Glassy (Sodium Hexametaphosphate) SECTION 1: GENERAL Sec. 1.1 Scope This sta
17、ndard describes sodium polyphosphate, glassy, for use in the treatment of potable water, wastewater, and reclaimed water. This material is also known as sodium hexametaphosphate, sodium tetrapolyphosphate, and Grahams salt. Sec. 1.2 Purpose The purpose of this standard is to provide the minimum requ
18、irements for sodium polyphosphate, glassy, including physical, chemical, sampling, packaging, shipping, and testing requirements. Sec. 1.3 Application This standard can be referenced in documents for purchasing and receiving sodium polyphosphate, glassy, and can be used as a guide for testing the ph
19、ysical and chemical properties of sodium polyphosphate, glassy, samples. The stipula- tions of this standard apply when this document has been referenced and only to sodium polyphosphate, glassy, used in the treatment of potable water, wastewater, and reclaimed water. Copyright 2017 American Water W
20、orks Association. All Rights Reserved. 2 AWWA B502-17 SECTION 2: REFERENCES This standard references the following documents. In their latest editions, they form a part of this standard to the extent specified within the standard. In any case of conflict, the requirements of this standard shall prev
21、ail. APHA,* AWWA, WEF Standard Methods for the Examination of Water and Wastewater. ASTM E11Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves. NSF /ANSI 60Drinking Water Treatment ChemicalsHealth Effects. SECTION 3: DEFINITIONS The following definitions shall apply in this stand
22、ard: 1. Day: A day is defined as a 24-hour period. 2. Manufacturer: The party that manufactures, fabricates, or produces materials or products. 3. Potable water: Water that is safe and satisfactory for drinking and cooking. 4. Purchaser: The person, company, or organization that purchases any materi
23、als or work to be performed. 5. Reclaimed water: Wastewater that becomes suitable for beneficial use as a result of treatment. 6. Sodium polyphosphate, glassy: A glassy solid that is a soluble sodium phos- phate containing Na 2 O and P 2 O 5in a molar ratio of approximately 1.1 Na 2 O to 1.0 P 2 O 5
24、 . It is an amorphous mixture of long-chain polyphosphates with the for- mula Na n+2 P n O n+1 . The approximate value of n is either 1216 or 1821. 7. Supplier: The party that supplies material or services. A supplier may or may not be the manufacturer. 8. Tamper-evident packaging: Packaging having
25、one or more indicators or barriers to entry that if breached or missing, can reasonably be expected to provide visible evidence to the purchaser that tampering has occurred. The tamper-evident * American Public Health Association, 800 I Street, NW, Washington, DC 20001. Water Environment Federation,
26、 601 Wythe Street, Alexandria, VA 22314. ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. 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 2017 American Water Works Association. All Rights Reserved.
