1、 ANSI/AWWA C110/A21.10-12 (Revision of ANSI/AWWA C110/A21.10-08) AWWA Standard Effective date: May 1, 2012. First edition approved by AWWA Board of Directors May 4, 1951. This edition approved Jan. 22, 2012. Approved by American National Standards Institute Feb. 23, 2012. 6666 West Quincy Avenue Adv
2、ocacy Denver, CO 80235-3098 Communications T 800.926.7337 Conferences www.awwa.org Education and TrainingScience and TechnologySections The Authoritative Resource on Safe WaterDuctile-Iron and Gray-Iron Fittings SM Copyright 2012 American Water Works Association. All Rights Reserved. ii AWWA Standar
3、d 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 specifi- cations. The AWWA standards usually contain options
4、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 product. T
5、he 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 that the product described wi
6、ll provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be placed 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 - America
7、n 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 Standard is intended as a guide to aid the manufacturer, the consumer, and t
8、he general public. The existence of 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. Ameri- can National
9、Standards are subject to periodic review, 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 a
10、re 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 approval process. This American National Standard may be revised or withdrawn
11、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 information on all standards by calling or writing the American National Stand
12、ards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; (212) 642-4900, or e-mailing infoansi.org. ISBN-13, soft cover: 978-1-58321-883-9 eISBN-13, ebook: 978-1-61300-141-7 ISBN-10, soft cover: 1-583231-883-1 eISBN-10, ebook: 1-61300-141-X All rights reserved. No part of this publicat
13、ion 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, without the written permission of the publisher. Copyright 2012
14、by American Water Works Association Printed in USA Copyright 2012 American Water Works Association. All Rights Reserved. iii Committee Personnel Subcommittee 3, Fittings, which reviewed this standard, had the following personnel at the time: Larry R. Dunn, Chair General Interest Members P.I. McGrath
15、 Jr., Consultant, Birmingham, Ala. (AWWA) E.S. Ralph,* Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) P.A. Selig, Birmingham, Ala. (AWWA) Producer Members S. Bhattacharji, Sigma Corporation, Cream Ridge, N.J. (AWWA) M. Bowsher, Star Pipe Products Inc., Houston, Texas (AWWA) S.J. Box, Sigma C
16、orporation, Cropwell, Ala. (AWWA) L.R. Dunn, US Pipe however, it continues to maintain its representation on the A21 Committee. In 1997, AGA withdrew as co-secretariat. The present scope of Committee A21 activity is the development of standards and manuals addressing ductile-iron pressure pipe for w
17、ater and ductile-iron and gray-iron fittings for use with such pipe. These standards and manuals include topics, such as design, dimensions, materials, coatings, linings, joints, accessories, methods of inspec- tion and testing, and installation. The work of Committee A21 is conducted by subcommitte
18、es. The scope of Subcom - mittee 3, Fittings, includes the periodic review of current A21 standards for fittings and the preparation of revisions and new standards, when needed, for fittings to be used with cast-iron and ductile-iron pressure pipe included in A21 standards. I.B. History. The evoluti
19、on of AWWA and ANSI standards for fittings is presented in this foreword to provide information relating to systems having aged cast- iron pipe and fittings still in service. The earliest record of an AWWA standard for cast-iron pipe is contained in the Report of Proceedings of the Tenth Annual Meet
20、ing of the American Water Works Association (1890). In 1902, NEWWA adopted a more detailed standard titled “Standard Specification for Cast Iron Pipe and Special Castings.” The next AWWA standard for pipe and fittings, AWWA 7C.1-1908, was approved May 12, 1908. A second edition, AWWA C100-52T, was a
21、pproved by AWWA Dec. 31, 1952, and by NEWWA Jan. 23, 1953. The third edition, AWWA C100-54T, * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. Copyright 2012 American Water Works Association. All Rights Reserved. x was approved by AWWA Oct. 25, 1954, and
22、 finally issued as AWWA C100-55, hav- ing been advanced from tentative to standard without change June 17, 1955. AWWA C100-55 covered fittings in the size range 4 to 60 in. (100 to 1,500 mm). The fittings were bell and spigot (caulked joint) of the so-called long-radius design. The outside diameter
23、(OD) for spigots varied with wall thicknesses, which were designated classes A, B, C, and D. Fittings 4 to 12 in. (100 to 300 mm) were made to class D patterns, having only one OD and pressure rating. Fittings 14 to 24 in. (350 to 600 mm) in size were provided in classes B and D, and fittings 30 to
24、60 in. (750 to 1,500 mm) in size were provided in classes A, B, C, and D. Fittings made in accordance with AWWA 7C.1-1908 and C100-55 had the class identification cast on the fitting. ASA* A21.10-1952 (AWWA C110-52) was approved by ASA Sept. 30, 1952, fol- lowing approval by AWWA May 4, 1951. The st
25、andard described 3- to 12-in. (80- to 300-mm) fittings of the so-called short-body design, which were the subject of exten- sive research and tests by Committee A21. The rated pressure given by the standard was 250 psi (1,724 kPa) plus water hammer. The standard provided a safety factor of 2.5 plus
26、water hammer based on burst tests. Hydraulic losses were determined and compared with those found with long-radius fittings manufactured in accordance with AWWA Standards. The minimum grade of cast iron in the standard was 25,000 psi (172.4 MPa) tensile strength. ASA A21.10-1964 (AWWA C110-64) was a
27、pproved by ASA Jan. 9, 1964. The revi- sion described 2- to 48-in. (50- to 1,200-mm) fittings. The design of the 14- to 48-in. (350- to 1,200-mm) fittings in the revision was based on an exhaustive series of burst tests. The minimum grade of cast iron (25,000 psi 172.4 MPa tensile strength) was reta
28、ined, and higher grades up to 35,000 psi (241.3 MPa) tensile strength were used to secure higher pressure ratings without radically changing the thicknesses. Ductile iron, grade 80-60-03, was also added in the 14- to 48-in. (350- to 1,200-mm) sizes with a rated working pressure of 250 psi (1,724 kPa
29、), having the same wall thicknesses as 150-psi (1,034-kPa) rated gray-iron fittings. The minimum safety factor based on burst tests of representative fittings of the weakest type was three times the rated working pressure. Tables for flanged fittings and mechanical-joint fittings were added for the first time. * American Standards Association (ASA) is the former name of the American National Standards Institute. Copyright 2012 American Water Works Association. All Rights Reserved.
