AWWA-C224-2002.pdf
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1、American Water Works Association (1 st Edition) ANSIIAWWA C224-O1 AWWA STANDARD FOR TWO-LAYER NYLON-11 -BASED POLYAMIDE COATING SYSTEM FORTHE INTERIOR AND EXTERIOR OF STEEL WATER PIPE, CONNECTIONS, FIlTINGS, AND SPECIAL SECTIONS L II i r n -#a# Americen National Standards Instiiuie Effective date: M
2、arch 1, 2002. First edition approved by AWWA Board of Directors June 17, 2001. Approved by American National Standards Institute: Dec. 21,2001. AMERICAN WATER WORKS ASSOCIATION 6666 West Quincy Avenue, Denver, Colorado 80235 www.awwa.org Copyright American Water Works Association Provided by IHS und
3、er license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:29:14 MDTNo reproduction or networking permitted without license from IHS -,-,- AVWVA Standard This document is an American Water Works Association (AWWA) standard. It is not a specification. AWWA
4、 standards describe minimum requirements and do not contain all of the engineering and ad- ministrative information normally contained in specifications. The AWWA standards usually contain options that must be evaluated by the user of the.standard. Until each optional feature is specified by the use
5、r, the product or service is not fully defi (212) 642-4900. 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 exc
6、erpts or quotations for review purposes, without the written permission of the publisher, Copyright O 2001 American Water Works Association Printed in USA 11 Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not fo
7、r Resale, 03/21/2007 07:29:14 MDTNo reproduction or networking permitted without license from IHS -,-,- Committee Personnel The Steel Water Pipe Manufacturers Technical Advisory Committee Task Group (SWPMTAC) on C224, which developed this edition, had the following personnel at the time: Page. McAnd
8、rew, Chair Mike Bauer, Tnemec Company Inc., Kansas City, Kan. Page McAndrew, Autofina Chemicals, King of Prussia, Penn. Mike Sangalli, Smith-Blair Inc., Texarkana, Texas M.C. Siminski, Morton Powder Coatings, Reading, Penn. (AWWA) (AWWA) (AWWA) (AWWA) H.R. Stoner, Consultant, North Plainfield, N.J.
9、Martin Topps, Glynwed Pipe Systems, Hixson, Tenn. J.A. Wise, Canus Industries Inc., Port Coquitlam, B.C. The AWWA Standards Committee on Steel Pipe, which reviewed and approved this standard, had the following personnel at the time of approval: George J. Tupac, Chair John H. Bambie Jr., Vice-Chair D
10、ennis A. Dechant, Secretary Consumer Members G.A. Andersen, New York City Bureau of Water Supply, Corona, New York J.H. Bambei Jr., Denver Water, Denver, Colo. D.W. Coppes, Massachusetts Water Resources Authority, Boston, Mass. R.V. Frisz, US Bureau of Reclamation, Denver, Colo. T.J. Jordan, Metropo
11、litan Water District of Southern California, La Verne, Calif T.A. Larson, Tacoma Water Division, Tacoma, Wash. A.L. Linard, Los Angeles Department of Water therefore, it is the manufacturers and purchasers responsibility to verify the current requirements of federal, state, and local regulations. Se
12、c. 4.3 Primer Only those primers approved by the coating manufacturer may be used in the production of a polyamide coating system. Specifics of shelf life and proper storage of a primer shall be provided by the manufacturer. Sec. 4.4 Polyamide Powder 4.4.1 Properties. The polyamide powder employed i
13、n the production of polyamide coating shall be a single-component product, composed of principally Nylon-11, fillers, colorants, antioxidants, and other materials, so that when employed Copyright American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/11111110
14、01, User=Wing, Bernie Not for Resale, 03/21/2007 07:29:14 MDTNo reproduction or networking permitted without license from IHS -,-,- TWO-LAYER NYLON-11-BASED POLYAMIDE COATING SYSTEM 5 according to the specifications of the manufacturer, produces a uniform, continuous coating that complies with all r
15、equirements of this standard. The properties of this polyamide powder shall comply with all the requirements of Table 1. 4.4.2 Shelf life and storage. Specifics of shelf life and proper storage of the polyamide powder described in Sec. 4.4.1 shall be provided by the manufacturer. 4.4.3 Application c
16、apability. When applied by a method specified by the manufacturer, the polyamide powder described in Sec. 4.4.1 shall produce, after appropriate thermal treatment, a uniform coating having a thickness that complies with the requirements written in Table 2 and Sec. 4.5.3.3. Sec. 4.5 Coating Applicati
17、on 4.5.1 General. Polyamide coatings shall be applied by a method specified by the manufacturer. When the same coating is to be applied to both the internal surface and external surface of the steel article, it is usually preferable to employ the method of immersion in a fluidized bed. When the coat
18、ing is to be applied to either the internal surface or the external surface of a steel article, but not both, it is usually preferable to employ either the method of electrostatic spray or the method of spray onto a preheated article. When different coatings are used for internal surface and externa
19、l surface, it may be preferable to employ the method of rotocoating (a method whereby the coating is applied to the interior surface of a pipe by rotating the pipe heated with polyamide powder inside). Note, however, that because elevated temperatures are required to perform rotocoating, coatings th
20、at have been applied prior to rotocoating may be damaged. Table 1 systems Properties of polyamide powder employed in the production o f polyamide coating Minimum Maximum ASTM Value Value Method Specific Gravity at 73F (g/cm3) 1.05 1.20 D-792 Particle Size Distribution (weight percent retained on a N
21、o. 100 mesh screen) Melting Point (“CPF) Water Absorption (weight percent) D-1921 5 45 182/360 19 ll3 76 E-324 1.0 2.7 D-570 - - Amount of Poly (1 1-aminoundecanoic acid) (weight percent) 70 Inherent Viscosity (deciliterdg) (a) 0.72 - D-789 NOTE: Inherent viscosity is measured at 20C on a 0.5% (by w
22、eight) solution of polyamide powder dissolved in meta-cresol. Alternatively, this requirement shall be satisfied if the Nylon-11 resin from which polyamide powder is produced has a minimum value of inherent viscosity (measured under the exact same conditions as just cited) of 0.82 deciliterdg. Copyr
23、ight American Water Works Association Provided by IHS under license with AWWA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/21/2007 07:29:14 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 AWWAC224-O1 Table 2 Thicknesses of polyamide coating syst
24、ems Minimum Maximum Value Value Standard Reference Thickness (rnilsXa) Method (Section) Exterior and Interior by fluidized bed, electrostatic spray, or spray onto preheated article (b) -pipes, connections, fittings, special sections, other articles 9 (c) 24 SSPC PA-2 4.5.3.3 Interior Only by fluidiz
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