1、AWWA Standard SM Calcium Chloride Effective date: June 1, 2017. First edition approved by AWWA Board of Directors June 23, 1985. This edition approved Jan. 14, 2017. Approved by American National Standards Institute Oct. 13, 2016. ANSI/AWWA B550-17 (Revision of ANSI/AWWA B550-10) Copyright 2017 Amer
2、ican 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 normally containe
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5、sensus of the water industry that the product described will provide satisfactory ser- vice. When AWWA revises or withdraws this standard, an official notice of action will be placed on the first page of the Official Notice section of Journal American Water Works Association. The action becomes effe
6、ctive on the first day of the month following 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 National St
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8、cesses, or proce - dures not conforming to the standard. American National Standards are subject to periodic review, and users are cau- tioned to obtain the latest editions. Producers of goods made in conformity with an American National Standard are encouraged to state on their own responsibility i
9、n 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 the ANSI a
10、pproval 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 This American National Standard may be revised or withdrawn at any time.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 publication. Purchasers of American National Standards may receive current i
11、nformation 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. hours of work by your fellow water professionals. Revenue from the sales of this AWWA material supports ongoing
12、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: 978-1-62576-217-7 eISBN-13, electronic: 978-1-61300-417-3 DOI: http:/dx.doi.org/10.1
13、2999/AWWA.B550.17 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 excerpts or quotations for review purposes, w
14、ithout the written permission of the publisher. Copyright 2017 by American Water Works Association Printed in USAiii Committee Personnel The AWWA Standards Committee on Softening and Conditioning Chemicals, which reviewed and approved this standard, had the following personnel at the time of approval: Clyde R. Dugan, Chair General Interest Members W.J. Conlon, Parsons Corporation, Tampa, Fla. (AWWA) N.E. McTigue,* EE write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at standardsawwa.org. Copyright 2017 American Water Works Association. All Rights Reserved.
