1、 ANSI/AWWA C115/A21.15-11 (Revision of ANSI/AWWA C115/A21.15-05) AW WA Standard Effective date: Oct. 1, 2011. First edition approved by AWWA Board of Directors Jan. 26, 1975. This edition approved June 12, 2011. Approved by American National Standards Institute July 12, 2011. 6666 West Quincy Avenue
2、 Advocacy Denver, CO 80235-3098 Communications T 800.926.7337 Conferences www.awwa.org Education and Training Science and Technology Sections The Authoritative Resource on Safe Water Flanged Ductile-Iron Pipe With Ductile- Iron or Gray-Iron Threaded Flanges SM Copyright2011AmericanWaterWorksAssociat
3、ion.AllRightsReserved. ii AWWA Standard This document is an American Water Works Association (AWWA) standard. It is not a specication. AWWA standards describe minimum requirements and do not contain all of the engineering and administrative information normally contained in speci- cations. The AWWA
4、standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specied by the user, the product or service is not fully dened. AWWA publication of a standard does not constitute endorsement of any product or product type, nor does AWWA test, cert
5、ify, 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 codes of any governmental authority. AWWA standards are intended to represent a consensus of the water supply industry
6、 that the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an ofcial notice of action will be placed in the ofcial notice section of Journal AWWA. The action becomes effective on the rst day of the month following the month of Journal AWWA publicatio
7、n of the ofcial 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
8、 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. Ameri- can National Standards are subject to periodic revi
9、ew, 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 particu
10、lar 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 that
11、 action be taken to reafrm, revise, or withdraw this standard no later than ve 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 2011 by American Water Works Association Printed in USA Copyright2011AmericanWaterWorksAssociation.AllRightsReserved. iii Committee Personnel Subcommittee 1, Pipe, which developed this standa
14、rd, had the following personnel at the time: Maury D. Gaston, Chair General Interest Members M.B. Horsley, Black however, it continues to maintain its representation on the A21 Committee. In 1997, AGA withdrew as co-secretariat. e present scope of Committee A21 activity is the development of standar
15、ds and manuals addressing ductile-iron pressure pipe for water and ductile-iron and gray-iron ttings for use with such pipe. ese standards and manuals include topics such as design, dimensions, materials, coatings, linings, joints, accessories, methods of inspec- tion and testing, and installation.
16、e work of Committee A21 is conducted by subcommittees. e scope of Sub- committee 1, Pipe, includes the periodic review of all current Committee A21 stan- dards for pipe, the preparation of revisions and new standards, and other matters pertaining to pipe standards. I.B. History. Flanged ttings, size
17、s 3 in. through 48 in. (80 mm through 1,200 mm), are described in ANSI/AWWA C110/A21.10, Standard for Ductile-Iron and Gray-Iron Fittings. Flanged ttings, sizes 54 in. through 64 in. (1,400 mm through 1,600 mm), are covered in ANSI/AWWA C153/A21.53, Standard for Ductile-Iron Compact Fittings. e ange
18、d pipe used with these ttings has been purchased for many years in accordance with users, manufacturers, and fabricators standards. An ANSI/AWWA standard was needed for anged pipe. Consequently, Subcommittee 1 submitted a proposed standard for anged pipe to Committee A21 in 1974. e rst edition of th
19、e standard was adopted in 1975. Subsequent revisions to ANSI/AWWA C115/A21.15 were approved by the AWWA Board of Directors in 1983, 1988, 1994, * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright2011AmericanWaterWorksAssociation.AllRightsReserved
20、. x 1999, and 2005. Subcommittee 1 reviewed the 2005 edition and submitted a proposed revision to Committee A21 in 2010. is seventh edition of ANSI/AWWA C115/ A21.15 was approved on June 12, 2011. I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative
21、 agreement with a consortium led by NSF* International (NSF) to develop voluntary third-party consensus standards and a certication program for direct and indirect drinking water additives. Other members of the original consortium included the American Water Works Association Research Foundation (Aw
22、waRF, now Water Research Foundation ) and the Conference of State Health and Environmental Managers (COSHEM). e 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
23、 in contact with, drinking water rests with individual states. Local agencies may choose to impose requirements more stringent than those required by the state. To evaluate the health eects of products and drinking water additives from such products, state and local agencies may use various referenc
24、es, including 1. An advisory program formerly administered by USEPA, Oce of Drinking Water, discontinued on Apr. 7, 1990. 2. Specic policies of the state or local agency. 3. Two standards developed under the direction of NSF, NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Eects, and NSF/ANSI
25、61, Drinking Water System ComponentsHealth Eects. 4. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, and other standards considered appropriate by the state or local agency. Various certication organizations may be involved in certifying products in accor- da
26、nce with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certication organizations within their jurisdiction. Accreditation of certi- cation organizations may vary from jurisdiction to jurisdiction. * NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105.
27、Water Research Foundation, 6666 W. Quincy Avenue, Denver, CO 80235. Persons outside the United States should contact the appropriate authority having jurisdiction. Both publications available from National Academy of Sciences, 500 Fifth Street, N. W., Washington, DC 20418. Copyright2011AmericanWater
28、WorksAssociation.AllRightsReserved. xi Annex A, “T oxicology Review and Evaluation Procedures,” to NSF/ANSI 61 does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA nal maximum contaminant level (MCL). e MALs of an unspecied list of “unregulated
29、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 certier. ANSI/AWWA C115/A21.15 does not address additives requirements. Users of this standard should
30、 consult the appropriate state or local agency having jurisdiction in order to 1. Determine additives requirements, including applicable standards. 2. Determine the status of certications by parties oering to certify products for contact with, or treatment of, drinking water. 3. Determine current in
31、formation on product certication. II. Special Issues. II.A. Flange Material Properties. Because this standard requires the material properties of gray-iron and ductile-iron anges to comply with ANSI/AWWA C110/ A21.10, the following material properties specied in ANSI/AWWA C110/A21.10 are listed for
32、information purposes. 1. Gray-iron anges, in accordance with ANSI/AWWA C110/A21.10, shall be manufactured of the following minimum tensile-strength iron listed in Table F.1. 2. Ductile-iron anges made in accordance with ANSI/AWWA C110/A21.10 shall be manufactured of grades of ductile iron with the f
33、ollowing minimum physical properties: 70,000 psi (483,000 kPa) tensile strength, 50,000 psi (345,000 kPa) yield strength, and 5 percent elongation; or Table F.1 Gray-iron ange minimum tensile strength Nominal Size* in. Minimum Tensile Strength psi (kPa) 0312 25,000 (172,000) 1424 30,000 (207,000) *Purchasers of gray-iron anges greater than 24 in. should contact the manufacturer or fabricator for strength requirements. To convert inches to millimeters, multiply by 25.4. Copyright2011AmericanWaterWorksAssociation.AllRightsReserved.
