AWWAC509-01Resilient-SeatedGateValvesforWaterSupplyService.pdf

American Water Works Association ANSUAWA C509-O1 (Revision of ANSVAWWA C509-94) AWWA STANDARD FOR RESILIENT-SEATED GATE VALVES FOR WATER SUPPLY SERVICE Effective date: Sept. 1,2001. First edition approved by AWWA Board of Directors Jan. 28, 1980. This edition approved Jan. 21, 2001. Approved by American National Standards Institute July 3,2001. AMERICAN WATER WORKS ASSOCIATION 6666 West Quincy Avenue, Denver, Colorado 80235 ww.awa.0 rg COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 A W A 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 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 type, nor does AWWA test, certifi, or approve any product. The use of AWWAstandards 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 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 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 American National Standard does not in any respect preclude anyone, whether that person has approved the standard or not, from manufactur- ing, 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 National Standard are encouraged to state on their own responsibility in advertising and promotional materiais 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 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 publication. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, 11 W. 42nd St., 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 information or retrieval system, except in the form of brief excerpts or quotations for review purposes, without the written permission of the publisher. Copyright O 2001 by American Water Works Association Printed in USA 11 COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 Committee Personnel The C509 Subcommittee, which developed this standard, had the following personnel at that time: Thomas J. Mettler, Chair Jerry Bottenfield, Clow Valve Company, Oskaloosa, Iowa L.R. Dunn, U.S. Pipe Flax or Hemp. Fed. Spec. TT-C-494b-Coating Compound, Bituminous, Solvent Type, Acid Resistant. MSSt SP-9-Spot Facing for Bronze, Iron, and Steel Flanges. MSS SP-60-Connecting Flange Joint Between Tapping Sleeves and Tapping Valves. MSS SP-113-Connecting Joint between Tapping Machines and Tapping Valves. SAES HS-l086/ASTM DS-56F-Metals and Alloys in the Unified Numbering System (UNS). SECTION 3: DEFINITIONS The following definitions shall apply in this standard: 1. Cosmetic defect: 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, grinding, or repairing of the blemish cause the component to fail these requirements, then the blemish shall be considered a structural defect. 2. Flanged joint: The flanged and bolted joint as described in AWWNANSI CllO/A21.10 or ANSI B16.1, class 125. 3. Manufacturer: The party that manufactures, fabricates, or produces materials or products. *Federal Specifications available from Naval Publications and Forms Center, 5801 Tabor Ave., ?Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park St. N.E., $Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001. Philadelphia, PA 19120. Vienna, VA 22180. COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 RESILIENT-SEATED GATE VALVES 5 4. Mechanical joint: The gasketed and bolted joint as described in ANSIIAWWA C 11 1lA2 1.11. 5. NPS: Nominal pipe size. 6. Purchaser: The person, company, or organization that purchases any materials or work to be performed. 7. Push-on joint: The single rubber gasket joint as described in ANSUAWWA c 1 1 UA2 1.11. 8. 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 casting, failure to meet the minimum wall-thickness requirement, or failure to meet production tests. 9. Tapping valve: A special gate valve designed with end connections and an unobstructed waterway to provide proper alignment and positioning of a tapping sleeve, valve, and machine for tapping pipe dry or under pressure. SECTION 4: REQUIREMENTS Sec. 4.1 Data to Be Supplied by the Manufacturer If requested by the purchaser, the manufacturer or supplier shall provide the following information when supplying iron-body, resilient-seated gate valves. 4.1.1 Catalog data. The manufacturer shall supply catalog data, including illustrations and a parts list that identifies the materials used for various parts. The information shall be in sufficient detail to serve as a guide in the assembly and disassembly of the valve and for ordering repair parts. 4.1.2 Weight information. The manufacturer shall provide a statement of the net assembled weight for each size of valve exclusive of joint accessories. 4.1.3 Assembly drawings. The manufacturer or supplier shall submit to the purchaser one set of drawings showing the principal dimensions, construction details, and materials used for all parts of the valve. All work shall be done and all valves shall be provided in accordance with these drawings after the drawings have been reviewed and accepted by the purchaser. Sec. 4.2 Materials . 4.2.1 General. Materials shall comply with the requirements of the Safe Drinking Water Act and other federal, state and local requirements. Legislation is COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 6 AWWA C509-O1 subject to change. Therefore, it is the manufacturers and purchasers responsibility to verify the current requirements of federal, state, and local regulations. When reference is made to ANSI, ASTM, AWWA, or other standards, it shall be understood that the latest revision thereof shall apply. All materials used in valves produced according to this standard shall conform to the requirements stipulated in the . following sections. 4.2.2 Mechanical and chemical properties. The requirements of ANSI, ASTM, AWWA, or other standards to which reference is made in this text shall govern the mechanical and chemical characteristics of the valve components. Whenever valve components are to be made in conformance with AWWA, ANSI, ASTM, or other standards that include test requirements or testing procedures, the manufacturer or supplier shall comply with those procedures. The records of all tests shall, if required by the purchasers specification, be made available to the purchaser. 4.2.2.1 Gray iron. Gray iron shall conform to or exceed the requirements of ASTM A126 Class B. 4.2.2.2 Ductile iron. Ductile iron shall conform to the requirements of ASTM A395 or ASTM A536. In addition, ductile iron shall contain no more than 0.08 percent phosphorus. 4.2.2.3 Steel. Carbon-steel castings, when used, shall be ASTM A27 grade U-60-30 or equal. 4.2.2.4 Copper alloys. Copper alloys used in valves shall comply with the following: 4.2.2.4.1 Copper alloy valve components shall be made to ASTM recognized alloy specifications with Metal and Alloys in the Unified Numbering System (UNS) designations. Copper alloys are not limited to those specified in this standard. All copper alloys, however, must meet the performance requirements of this standard, including but not limited to minimum yield strength, chemical requirements, and corrosion resistance. 4.2.2.4.2 Any copper alloy used in the cold-worked condition shall be capable of passing the mercurous nitrate test in accordance with ASTM B154 to minimize susceptibility to stress corrosion. 4.2.2.4.3 Waters in some areas have been shown to promote galvanic corrosion in the form of dezincification or dealuminization. Copper alloys which contain more than 16 percent zinc shall not be used in these waters. If aluminum bronze is used, the alloys shall be inhibited against dealuminization. COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 RESILIENT-SEATED GATE VALVES 7 4.2.2.4.4 Copper alloys which contain more than 16 percent zinc shall not contain less than 57 percent copper. 4.2.2.4.5 Copper alloys which contain 16 percent zinc or less shall not contain less than 79 percent copper. 4.2.2.4.6 Valve components manufactured from some grades of manganese bronze or some other materials are subject to stress corrosion. The manufacturer shall design the valve and select materials to minimize stress corrosion. 4.2.2.4.7 Copper alloys which contact drinking water shall comply with the Safe Drinking Water Act. 4.2.2.5 Gaskets. Gasket material shall be made of non-asbestos, inorganic mineral fiber, rubber composition, or paper that is free from corrosive ingredients. O-rings or other suitable elastomeric seals may be used. 4.2.2.6 O-rings. O-rings shall meet the requirements of ASTM D2000 and have physical properties suitable for the application. 4.2.2.7 Packing. Stuffing-box packing shall be made of flax conforming to Fed. Spec. HH-P-1O6d or other appropriate material. Hemp, asbestos, or jute packing shall not be used. 4.2.2.8 Coatings. Unless otherwise specified by the purchaser, valve coatings, as required in Sec. 4.5.2, shall meet the performance requirements of Sec. 3.4.5 of Fed. Spec. TT-C-494b for water-based enamel coating, or black asphalt coatings, or ANSUAWWA C550 for epoxy coatings, or equal. 4.2.2.9 Elastomers. Elastomers shall comply with the following: a. Rubber seats shall be resistant to microbiological attack, copper poison- ing, and ozone attack. b. Rubber-seat compounds shall contain no more than 8 parts per million (ppm) of copper ion and shall include copper inhibitors to prevent copper degradation of the rubber material. c. Rubber-seat compounds shall be capable of withstanding 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 concentration of 500 parts per billion (ppb) without visible cracking in the surfaces of the test samples after the test. d. Rubber-seat compounds shall have a maximum compression set value of 20 percent when tested in accordance with ASTM D395, method B, for 22 hr at 158F (70C). COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 8 AWWA C509-O1 e. Rubber-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. f. Rubber-seat compounds shall be free of vegetable oils, vegetable-oil derivatives, animal fats, and animal oils. Sec. 4.3 General Design 4.3.1 Structural design. All parts of all valves shall be designed to withstand, without being structurally damaged, (1) an internal test pressure of twice the rated design working pressure of the valve; and (2) the full-rated internal working pressure when the closure member is cycled once from a fully open to a fully closed position against the full-rated unbalanced working water pressure. In addition to these pressure requirements, the valve assembly and mechanism shall be capable of withstanding an input torque as follows: 3-in. and 4-in. (75-mm and 100-mm) NPS- 200 R.lb (270 Nm); 6 in. (150 mm), 8 in. (200 mm), 10 in. (250 mm), and 12 in. (300 mm) NPS-300 R.lb (406 N-m). For sizes larger than 12 in. (300 mm), consult the manufacturer. 4.3.2 Size of waterway. With the valve open, an unobstructed waterway shall be provided. The waterway shall have a diameter equal to or larger than the full nominal diameter of the valve. For tapping valves the size of the waterway shall include approplriate clearance for the diameter of the tapping machine cutter recommended by the valve manufacturer. Some valves may require an undersized cutter, which is smaller than the nominal diameter of the valve. Sec. 4.4 Detailed Design 4.4.1 Body and bonnet. 4.4.1.1 Material. The body and bonnet shall be made of gray iron or ductile iron. 4.4.1.2 Shell thickness. Shell thickness measurements taken at points dia- metrically opposite to each other shall, when added together and divided by two, equal or exceed the minimum metal thicknesses stated in Table 1. Shell thickness at no point shall be more than 12.5 percent thinner than the minimum metal thickness stated in Table 1, and no continuous area of deficient thickness shall exceed 12.5 percent of the pressure-containing shell area of the casting. COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 RESILIENT-SEATED GATE VALVES 9 Table 1 Minimum thickness of body and bonnet Valve Diameter Minimum Thickness* NPS, in. (mm) in. (in., fractions) (mm) 3 4 6 8 10 12 16 20 24 30 0.37 0.40 0.43 0.50 0.63 0.68 0.85 0.97 1.08 1.39 *The decimal value should be used when the two expressions are not exactly equivalent. 4.4.1.3 Body seating surfaces. Resilient seats shall seat against a corrosion- resistant surface. The surface may be either metallic or nonmetallic, applied in a manner to withstand the action of the line fluids and the operation of the sealing gate during long-term service. A metallic surface shall have a corrosion resistance equivalent to or better than bronze. A nonmetallic surface shall be in compliance with ANSVAWWA C550. 4.4.1.4 Valve ends. End connections shall conform to one of the following requirements. 4.4.1.4.1 Flanged ends. The end flanges of flanged valves shall conform to dimensions and drillings of ANSI B16.1 Class 125 or ANSYAWWA CllO/A21.10 unless explicitly provided otherwise in the purchasers specifications. Unless spot- facing is required by the purchasers specifications, the bolt holes of the end flanges shall not be spot-faced except when the thickness at any point within the spot-face area, as dened in MSS SP-9, exceeds the required minimum flange thickness of ASME/ANSI B16.1 by more than indicated in Table 2 or if the flange is not sufficiently flat. If the foregoing limit is exceeded, either spot-facing or back-facing may be used to meet the requirements. When required, all spot-facing shall be done in accordance with MSS SP-9. Bolt holes shall straddle the vertical centerline of the valve, unless otherwise specified by the purchaser. The laying lengths of flanged valves 12 in. (300 mm) and smaller shall conform to the requirements for double-disc gate valves listed in Table 1 of ANSVASME B16.10. COPYRIGHT American Water Works Association Licensed by Information Handling Services COPYRIGHT American Water Works Association Licensed by Information Handling Services 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册 即可下载 10 AWWA C509-O1 Table 2 Excess flange thickness Nominal Valve