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1、The Authoritative Resource for Safe Drinking WaterSM ANSI/AWWA C116/A21.16-03 (Revision of ANSI/AWWA C116/A21.16-98) AWWA Standard Effective date: Oct. 1, 2003. First edition approved by AWWA Board of Directors June 21, 1998. This edition approved by AWWA Board of Directors Jan. 19, 2003. Approved b
2、y American National Standards Institute July 23, 2003. Protective Fusion-Bonded Epoxy Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings for Water Supply Service Advocacy Communications Conferences Education and Training ? Science and Technology Sections 6666 West
3、 Quincy Avenue Denver, CO 80235-3098 T 1.800.926.7337 www.awwa.org Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo reproduction or networking permitted without license fr
4、om IHS -,-,- 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 contained in specifications. The AWWA standard
5、s usually contain 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,
6、 or approve any product. The use of AWWA standards is entirely voluntary. AWWA standards are intended to represent a consensus of the water supply industry that the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an official notice of action will be
7、 placed on the first page of the classified advertising section of Journal AWWA. The action becomes effective on the first day of the month following the month of Journal AWWA publication of the official notice. American National Standard An American National Standard implies a consensus of those su
8、bstantially 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 American National Standard does not in any respect preclude anyone, whether that person has approved the standa
9、rd or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Standards are subject to periodic review, and users are cautioned to obtain the latest editions. Producers of goods made in conformity with an American
10、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 particular American National Standards. CAUTION NOTICE:The American National Standards Institute (ANSI) approval date on
11、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 action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publicati
12、on. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, 25 W. 43rd St., Fourth Floor, New York, NY 10036; (212) 642-4900. Science and Technology AWWA unites the drinking water community by develop
13、ing and distributing authoritative scientific and technological knowledge. Through its members, AWWA develops industry standards for products and processes that advance public health and safety. AWWA also provides quality improvement programs for water and wastewater utilities. All rights reserved.
14、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, without the written permission of the pu
15、blisher. Copyright 2003 by American Water Works Association Printed in USA Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo reproduction or networking permitted without li
16、cense from IHS -,-,- iii Committee Personnel Subcommittee 4, Coatings and Linings, which developed this standard, had the following personnel at the time: Troy F. Stroud, Chair Kenneth W. Henderson, Vice-Chair Consumer Members K.A. Alms, Missouri American Water Company, St. Louis, Mo.(AWWA) D.T. Bra
17、dley, South Fork Water Board, Oregon City, Ore.(AWWA) R.R. Goold, Kansas City Water Department, Kansas City, Mo.(AWWA) T.C. Moreno, Bexar Metropolitan Water District, San Antonio, Texas(AWWA) D.W. Russom, Central Arkansas Water, North Little Rock, Ark.(AWWA) C.R. Schwenker, Fairfax County Water Auth
18、ority, Merrifield, Va.(AWWA) R.L. Worden, Guadalupe-Blanco River Authority, Seguin, Texas(AWWA) General Interest Members K.W. Henderson, Malcolm Pirnie Inc., White Plains, N.Y.(AWWA) M.G. Hoover, Tetra Tech ASL, Pasadena, Calif.(AWWA) D.A. Lincoln, Aurora Pipe Line Company, Commerce City, Colo.(AWWA
19、) P.I. McGrath Jr., Consultant, Birmingham, Ala.(AWWA) J.R. Plattsmier, Montgomery Watson, Sunrise, Fla.(AWWA) W.H. Smith, Flora, Ill.(AWWA) K.E. Wilson, Post Buckley Schuh Jernigan, Tampa, Fla.(AWWA) Producer Members D.R. Charko, Atlantic States Cast Iron Pipe Company, Phillipsburg, N.J.(AWWA) A.M.
20、 Horton, US Pipe or write to the group at 6666 West Quincy Avenue, Denver, CO 80235- 3098; or e-mail at standardsawwa.org. Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo
21、 reproduction or networking permitted without license from IHS -,-,- 1 AWWA Standard ANSI/AWWA C116/A21.16-03 (Revision of ANSI/AWWA C116/A21.16-98) Protective Fusion-Bonded Epoxy Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings for Water Supply Service SECTION
22、1:GENERAL Sec. 1.1Scope This standard describes protective fusion-bonded epoxy coatings for the interior and exterior surfaces of ductile-iron and gray-iron fittings used for water supply service. The standard describes the material, application, and performance require- ments for these coatings. Th
23、is standard does not describe coatings agreed on between the purchaser and the manufacturer for special service conditions, such as saltwater, sewers, wastewater, acid, high temperature, and so forth. Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Emp
24、loyees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo reproduction or networking permitted without license from IHS -,-,- 2AWWA C116/A21.16-03 Sec. 1.2Purpose The purpose of this standard is to provide purchasers and manufacturers with the minimum requirements for fusion-bon
25、ded epoxy coatings and linings for the interior and exterior of fittings. Sec. 1.3Application This standard, or sections of this standard, can be referenced in specifications for purchasing fittings with an interior and exterior fusion-bonded epoxy coating. SECTION 2:REFERENCES This standard referen
26、ces 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 prevail. ANSI*/AWWA C110/A21.10Standard for Ductile-Iron and Gray-Iron Fit- tings, 3 In. Through 48 I
27、n. (76 mm Through 1,219 mm), for Water. ANSI/AWWA C153/A21.53Standard for Ductile-Iron Compact Fittings for Water Service. ANSI/NSF 61, Drinking Water System ComponentsHealth Effects. ASTM G14Standard Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test). ASTM G62Standard Test
28、 Methods for Holiday Detection in Pipeline Coatings. Food and Drug Administration Document, Title 21 of the Code of Federal Regulations on Food Additives, Sec. 175.300, Resinous and Polymeric Coatings. SECTION 3:DEFINITIONS The following definitions shall apply in this standard: *American National S
29、tandards Institute, 25 W. 43rd St., Fourth Floor, New York, NY 10036. American Society for Testing and Materials, 100 Barr Harbor Dr., West Conshohocken, PA 19428. Available from the US Government Printing Office, Superintendent of Documents, Washington, DC 20402. Copyright American Water Works Asso
30、ciation Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo reproduction or networking permitted without license from IHS -,-,- FUSION-BONDED EPOXY COATINGS3 1.Application:The method by which the coating material is a
31、pplied or deposited on the fitting. Methods of application include, but are not restricted to, a fluidized bed or an electrostatic spray system. Both processes require a preheating or a postheating process, or both. 2.Coating:A protective material on the surfaces of fittings that meets the requireme
32、nts of this standard. 3.Coating applicator:The party that applies a coating that meets the requirements of this standard. The coating applicator may or may not be the manufacturer of the fittings. 4.Coating material:An epoxy material applied in powder form that provides a heat-activated, chemically
33、cured coating. 5.Coating system:Those materials and procedures used to produce a coating that meets the requirements of this standard. 6.Holiday test:A nondestructive test of the coating of a fitting performed in accordance with this standard to determine by electric potential the presence of voids
34、or holidays in the coating. 7.Manufacturer:The party that manufactures, fabricates, or produces materials or products. 8.Purchaser:The person, company, or organization that purchases any materials or work to be performed. SECTION 4:REQUIREMENTS Sec. 4.1Materials 4.1.1Coating material.The coating mat
35、erial shall be a powder epoxy. The coating material shall be formulated from materials deemed acceptable by one of the following: 1.Food and Drug Administration Document, Title 21 of the Code of Federal Regulations on Food Additives, Sec. 175.300, Resinous and Polymeric Coatings. 2.ANSI/NSF 61, Drin
36、king Water System ComponentsHealth Effects. Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02 MDTNo reproduction or networking permitted without license from IHS -,-,- 4AWWA C116
37、/A21.16-03 Sec. 4.2Surface Preparation 4.2.1General.Surfaces shall be clean and preparation shall be in accordance with the coating manufacturers recommendation and shall be adequate to provide a coating that meets the performance requirements of this standard. 4.2.2Visual examination.Before surface
38、 preparation, each fitting to be coated shall be visually inspected for damages and conditions detrimental to coating system application. Sec. 4.3Coating Application 4.3.1Coating areas.The protective fusion-bonded epoxy coating shall be applied to the surfaces to be coated in accordance with the coa
39、ting manufacturers recommendation and in such a manner that meets all requirements of this standard. 4.3.2Joint areas.As a result of critical dimensional tolerances in joint areas, it may be necessary to limit the protective coating thickness in these areas to maintain a leakproof joint. However, th
40、e thickness in the joint area shall not be less than 4 mil. Sec. 4.4Coating System Qualification 4.4.1Type.The coating materials shall conform to Sec. 4.1.1 of this standard. 4.4.2Performance testing.The coating system shall be tested in accordance with Sec. 5.1 of this standard. 4.4.3Changes to coa
41、ting system.If either the chemical composition or application procedure parameters of the coating material are modified from the original composition or parameters, the modified coating system shall be retested in accordance with protocols in Sec. 4.1.1 and Sec. 5.1 of this standard. SECTION 5:VERIF
42、ICATION Sec. 5.1Qualification Testing 5.1.1Test coupon.The coating material shall be applied to a test coupon cut from a section of a fitting approximately 6 in. (150 mm) in diameter and approximately 4 in. (100 mm) in length, split lengthwise into two approximately equal sections so that both the c
43、oncave and convex surfaces are accessible for examination. The test coupon shall be made of the same material as the product to Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:24:02
44、MDTNo reproduction or networking permitted without license from IHS -,-,- FUSION-BONDED EPOXY COATINGS5 be coated, and surface roughness of the test coupon shall be similar to the body of the product to be coated. The coating shall be applied to the convex and concave surfaces. The surface preparati
45、on, coating application procedures, coating thickness, and curing parameters shall be the same as those to be used for the body of the fitting. In no case shall the coating thickness of the test coupon be less than 4 mil. 5.1.2Disbondment or blistering.An X shall be scribed with a sharp instru- ment
46、 through the coating material to the metal surface beneath for the maximum length possible on both the concave and convex cylindrical surfaces of the test coupon. No disbondment or blistering of the coating material applied to the scribed test coupon shall be visible after 500 hr of immersion in 150
47、F (66C) distilled water. 5.1.3Direct impact.No cracking nor disbonding of the coating material under the indentor of an impact apparatus similar to that described in ASTM G14* shall be visible without magnification after a direct impact of 20 in.-lbf (2.26 J) is applied near the center of the convex
48、 and concave cylindrical surfaces of the test coupon. Sec. 5.2Production Testing 5.2.1Test frequency.Tests described in Sec. 5.2.2 and Sec. 5.2.3 shall be performed on fittings at a frequency adequate to ensure compliance with the performance requirements of this standard but no less than once per hour. 5.2.2Visual examination.Visual examination of all coated surfaces shall disclose no blisters, cracks, or lack of coating coverage. 5.2.3Coating thickness.The dry film thickness of the coating shall be randomly measured with a nondestructive instrument on selected fittings. The