AWWA C508-2009 Swing-Check Valves for Waterworks Service 2-In Through 24-In (50-mm Through 600-mm) NPS《2英寸至24英寸(50毫米至600毫米)供水系统服务用旋启式止回阀》.pdf

1、ANSI/AWWA C508-09 (Revision of ANSI/AWWA C508-01) American Water Works Association The Authoritative Resource on Safe WateP AWDZA Standard Swing-Check Valves for Waterworks Service, 2-111. Through 24-111. (50-mm Through 600-mm) NPS Effective date: Jan. 1,2010. First edition approved by AWWA Board of

2、 Directors June 20,1976. This edition approved Jan. 25,2009. Approved by American National Standards Institute Nov. 11,2009 6666 West Quincy Avenue Denver, CO 80235-3098 T 800.926.7337 Advocacy Communications Conferences Education and Training Science and Technoiogy Sections Copyright 0 2010 America

3、n Water Works Association. All Rlghts Reserved. A WWA 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

4、specifi- cations. The AWWA standards 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

5、 type, nor does AWWA test, certiiy, 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 consensu

6、s of the water supply industry that . - . the product described will provide satisfactory service. When AWWA revises or withdraws this standard, an oificiai notice of action will be placed on the first page oi the classified advertising section of Journal AWWA. The action becomes effective on the fi

7、rst 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 substantially concerned with its scope and provisions. An Ameri- can National Standard is intended as a guide to aid the

8、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 standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to t

9、he standard. American Nationai 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 advertis- ing and promotional materials or o

10、n tags or labeis that the goods are produced in conformity with particular American National Standards. CAUTION NOTICE: The American Nationai Standards Institute (ANSI) approval date on the front cover of this standard indicates completion of the ANSl approval process. This American National Standar

11、d may be revised or withdrawn at any time. ANSl procedures require that action be taken to reaifirm, 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 ail standards by calling or writi

12、ng the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; (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 informa

13、tion or retrieval system, except in the form of brief excerpts or quotations for review purposes, without the written permission of the pubiisher. Copyright 2010 by American Water Works Association Printed in USA li Copyright 0 2010 Amencan Water Works Assoclation. Ail Rights Reserved. Committee Per

14、sonnel The AWWA Standards Subcommittee on Swing-Check Valves for Waterworks Service, which reviewed and approved this standard, had the following personnel at the time of approval: John V. Ballun, Chair General Interest Membm G.E. Laverick, Underwriters Laboratories Inc., Northbrook, Ill. Producer M

15、em bers A. Abuellel, Henry Pratt Company, Aurora, Ill. J.V. Ballun, Val-Matic Valve ihdard Specification for Electrodeposited Coatings of Zinc 9 , on Iron and Steel. _ 2 ,.-I- , A- - ,/ -STM intcmstianal. 100 atr zrkri$; West Conibhockcn. PA 11428. , ,- .-_,- copyright 0 201 0 American Water Works A

16、ssociation. All Rights Reserved. SWING-CHECK VALVES FOR WATERWORKS SERVICE 5 ASTM B763-Standard Specification for Copper Alloy Sand Castings for Valve Application. ASTM B766-Standard Specification for Electrodeposited Coatings of Cadmium. ASTM B858-Standard Test Method for Determination of Susceptib

17、ility to Stress Corrosion Cracking in Copper Alloys Using an Ammonia Vapor Test. ASTM D429-Standard Test Methods for Rubber Property-Adhesion to Rigid Substrates. ASTM D471-Standard Test Method for Rubber Property-Effect of Liquids. ASTM D1149-Standard Test Method for Rubber Deterioration-Surface Oz

18、one Cracking in a Chamber. ASTM D2000-Standard Classification System for Rubber Products in Automotive Applications. MSS* SP 9-Spot Facings for Bronze, Iron, and Steel Flanges. SECTION 3: DEFINITIONS The following definitions shall apply in this standard. 1. Clear waterway valve: A clear waterway va

19、lve shall be capable of passing a sphere equal to the nominal size of the valve. 2. Cosmetic drfert: A blemish that has no effect on the ability of the component to meet the structural design and production test requirements of this standard. Should the blemish or the activity of plugging, welding,

20、grinding, or repairing ofthe blemish cause the component to fail these requirements, the blem- ish shall be considered a structural defect. 3. Day: A day is defined as a 24-hr period. 4. Full waterway value: A full waterway valve shall provide a flow path with an area equal to or greater than the ar

21、ea of the nominal valve size. 5. Iron body: The body of the valve, which shall be of gray iron, mal- leable iron, or ductile cast iron, as described in Sec. 4.3.2.1. 6. Manuficturer: The party that manufactures, fabricates, or pro- duces materials or products. 7. Mechanical joint: The gasketed and b

22、olted joint as detailed in ANSI/ AWWA Clll/A21.11. Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park St. NE, Vienna, VA 22180 Copyright O 2010 American Water Works Association. All Rights Reserved 6 AWWA C508-09 8. NPS: Nominal pipe size. 9. Purchaser: The person, co

23、mpany, or organization that purchases any materials or work to be performed. 10. Structural defect: A flaw that causes the component to fail the structural design or test requirements of this standard. This includes, but is not limited to, imperfections that result in leakage through the walls of a

24、casting, fail- ure to meet the minimum wall-thickness requirement, or failure to meet produc- tion tests. SECTION 4: REQUIREMENTS Sec. 4.1 Permeation The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping in locations where there is

25、like- lihood the pipe will be exposed to significant concentrations of pollutants consist- ing of low molecular weight petroleum products or organic solvents or their vapors. Research has documented that pipe materials-such as polyethylene, polybutyl- ene, polyvinyl chloride, and asbestos cement-and

26、 elastomers, such as used in jointing gaskets and packing glands, are subject to permeation by lower molecular weight organic solvents or petroleum products. If a potable water, wastewater, or reclaimed water pipe must pass through such a contaminated area or an area sub- ject to contamination, cons

27、ult with the manufacturer regarding permeation of pipe walls, jointing materials, and so forth, before selecting materials for use in that area. Sec. 4.2 Data to Be Supplied by Manufacturer If requested by the purchaser, the manufacturer shall provide the following information for swing-check valves

28、. 4.2.1 Data. The manufacturer shall supply data, including illustrations and a parts schedule, that identifies the materials to be used for making various parts. This information shall be in sufficient detail to serve as a guide for assembly and disassembly of the check valve and for ordering parts

29、. 4.2.2 Weight information. The manufacturer shall provide the weight of an assembled valve for each valve size. 4.2.3 Assembly drawings. The manufacturer shall submit to the purchaser assembly drawings showing the principal dimensions, construction details, and materials to be used for all parts of

30、 the check valve. Copyright O 2010 Arnerlcan Water Works Association. All Rights Reserved SWING-CHECK VALVES FOR WATERWORKS SERVICE 7 4.2.4 installation. The manufacturer shall provide installation require- ments and any special limitations as to pipe orientation (i.e., horizontal or vertical). Sec.

31、 4.3 Materials Materials shall comply with the requirements of the Safe Drinking Water Act and other federal requirements for potable water, wastewater, and reclaimed water systems as applicable. 4.3.1 General. Materials used in valves produced according to this stan- dard shall conform to the requi

32、rements stipulated in the following sections. 4.3.2 Mechanical and chemical requirements. The requirements of check valve components shall be as required by ANSI, ASTM, AWWA, MSS, or other standards referenced. 4.3.2.1 Iron castings. Gray iron shall conform to ASTM A126, class B. Malleable cast iron

33、 shall conform to ASTM A47, grade 32510, or ASTM A197. Ductile cast iron shall conform to ASTM A395 or ASTM A536, grade 65-45-12, 70-50-05, or 80-55-06. 4.3.2.2 Brass or bronze. Brass or bronze used in check valves shall com- ply with the following requirements. 4.3.2.2.1 Brass or bronze components

34、shall be made from a copper alloy as listed in Table 1. 4.3.2.2.2 Any brass or bronze alloy containing more than 16 percent zinc used in the cold-worked condition shall be capable ofpassing a mercurous nitrate test in accordance with ASTM B154 or a 10-day ammonia vapor test at 9.8-10.0 pH value per

35、ASTM B858 to indicate minimum susceptibility to stress corro- sion. Following exposure, tested parts shall show no evidence of cracking under 25-times magnification or shall comply with the seat test stated in Sec. 5.2.2. 4.3.2.2.3 Waters in some areas of the United States have been shown by experie

36、nce to promote galvanic corrosion in the form of dezincification or dealu- minization. In these waters, brass or bronze materials shall not contain more than 16 percent zinc. If aluminum bronze is used, the alloy shall he inhibited against dealuminification. The manufacturer shall he notified if the

37、se conditions exist. 4.3.2.3 Steel and stainless steel. Body bolt, stud, and nut material shall conform to ASTM A307. Carbon steel castings shall conform to ASTM A27, grade U-60-30. Stainless-steel parts, when used, shall conform to ASTM A276 or ASTM A240. 4.3.2.3.1 Bolts, studs, and nuts shall be c

38、admium-plated (ASTM B766 class 8, Type 11), zinc-coated (ASTM A153 or ASTM B633), or rust-proofed by some other process disclosed to and acceptable to the purchaser. The urchaser may Copyright 0 2010 American Water Works Association. All Rights Reserved. 8 AWWA C508-09 Table 1 Brass and bronze alloy

39、s Copper Alloy Valve Component ASTM Specification Alloy Designation Hinge Pin ASTM B16 ASTM B21 ASTM B138 ASTM B283 ASTM B21 ASTM B584 ASTM B763 ASTM B763 UNS C36000 UNS C46400 UNS C67500 UNS C67500 UNS C46400 UNS C84400 UNS C87500 UNS C99500 Seat Ring ASTM B62 UNS C83600 ASTM B271 UNS C92200 UNS C9

40、5400 ASTM B584 UNS C83600 ASTM 8584 UNS C84400 ASTM B763 UNS C99500 specify that these fasteners be made of some specific grade of a corrosion-resistant material (for example, low-zinc bronze, Monel, stainless steel, low-alloy steel, etc.). 4.3.2.4 Elastomers. Seat facing or O-ring seat facing used

41、to provide a seating surface or resilient hinge material shall be made of a rubber compound, having uniform dimensions and of a size, shape, and resiliency as to withstand ordinary wear and tear, rough usage, compression stresses, and damage caused by pipe scale or foreign matter carried by the wate

42、r. These materials shall have the fol- lowing characteristics: 4.3.2.4.1 Minimum tensile strength of 1,500 psi (10,340 kPa) and mini- mum ultimate elongation of 150 percent or minimum tensile strength of 2,200 psi (15,170 kPa) and minimum ultimate elongation of 100 percent. 4.3.2.4.2 A maximum set o

43、f 0.38 in. (9.4 mm) will be acceptable when the 2-in. (50-mm) marks are stretched to 6 in. (150 mm), held for 2 min, and then measured 2 min after release. 4.3.2.4.3 Rubber seats shall be resistant to microbiological attack, copper poisoning, and ozone attack. 4.3.2.4.4 Rubber-seat compounds shall c

44、ontain no more than 8 ppm of copper ion and shall include copper inhibitors to prevent copper degradation of the rubber material. Capyrlght 0 2010 American Water Works Association. All Rlghis Reserved SWING-CHECK VALVES FOR WATERWORKS SERVICE 9 4.3.2.4.5 Rubber-seat compounds shall be capable of wit

45、hstanding an ozone resistance test when tested in accordance with ASTM D1149. The tests shall be conducted on unstressed samples for 70 hr at 104F (40C) with an ozone con- centration of 50 parts per hundred million without visible cracking in the surfaces of the test samples after test. 4.3.2.4.6 Ru

46、bber-seat compounds shall contain no more than 1.5 parts of wax per 100 parts of rubber hydrocarbon and shall have less than 2 percent volume increase when tested in accordance with ASTM D471 after being immersed in distilled water at 73.4“F 2F (23C 1C) for 70 hr. Reclaimed rubber shall not be used.

47、 4.3.2.4.7 Rubber-seat compounds shall be free of vegetable oils, vegetable- oil derivatives, animal fats, and animal oils. 4.3.2.5 Gaskets. Gaskets shall be made of nonasbestos material(s) that are free from corrosive ingredients. O-rings or other suitable elastomeric seals may be used for gaskets.

48、 4.3.2.6 0-Rings. O-rings shall be compounded to meet ASTM D2000 and shall have physical properties suitable for the application. 4.3.2.7 Coatings. Unless otherwise specified by the purchaser, the inte- rior shall be coated with a black asphalt coating. When required by Sec. 4.4.8.3.2 for coated sea

49、ts or by the purchaser documents, a special interior coating, such as epoxy, shall be provided in conformance with the requirements of ANSIIAWWA C550. Sec. 4.4 General Design 4.4.1 General. Check valves shall be designed to prevent any permanent distortion of the body, cover, or seats and to avoid any strain upon the seats that would be sufficient to force them out of alignment when under test pressure as specified in Sec. 5.2. 4.4.2 End-to-end dimensions. End-to-end dimensions for flanged-end valves shall be as specified in Table 2. Some clear waterway valves may be