AIR RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES FOR WATERWORKS SERVICE

Transcription

1 American Water Works Association ANSI/AWWA C (Revision of ANSI/AWWA C512-92) R AWWA STANDARD FOR AIR RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES FOR WATERWORKS SERVICE Effective date: March 1, First edition approved by AWWA Board of Directors Jan. 26, This edition approved June 20, Approved by American National Standards Institute Inc. Dec. 30, AMERICAN WATER WORKS ASSOCIATION 6666 West Quincy Avenue, Denver, Colorado 80235

2 AWWA Standard This document is an American Water Works Association 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, certify, 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 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 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 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 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) 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 1999 American Water Works Association Printed in USA ii

3 Committee Personnel The AWWA Standards Committee on Waterworks Air-Release Valves, which developed and approved this standard, had the following personnel at the time of approval: Miles E. Wollam, Chair Consumer Members J.H. Bambei Jr., Denver Water Department, Denver, Colo. N.E. Gronlund, East Bay Municipal Utilities District, Oakland, Calif. M.I. Schwartz, Fairfax County Water Authority, Merrifield, Va. J.G. Yannotta, Los Angeles Water & Power, Los Angeles, Calif. General Interest Members J.J. Cusack Jr., Parsons Brinkerhoff Quade & Douglas, Braintree, Mass. R.G. Fuller, HDR Engineering Inc., Denver, Colo. J.E. Herold, Seattle Public Utilities, Seattle, Wash. W.A. Hunt, Consulting Engineer, Bozeman, Mont. M.D. Meadows, * Council Liaison, Brazos River Authority, Waco, Texas W.L. Meinholz, Alvord Burdick & Howson, Buffalo Grove, Ill. J.L. Patton, Black & Veatch LLP, Overland Park, Kan. R.J. Wahanik, Hystras, Wyommissing, Pa. J.S. Wailes, * Standards Engineer Liaison, AWWA, Denver, Colo. R.A. Ward, Windsor, Vt. M.E. Wollam, Montgomery Watson, Pasadena, Calif. Producer Members J.V. Ballun, Val-Matic Valve & Manufacturing Corporation, Elmhurst, Ill. D.M. Beck, PowerSeal Pipeline Products Corporation, Wichita Falls, Texas Keith Hall, APCO Willamette-Valve & Primer Corporation, San Clemente, Calif. P.O. Landon, Val-Matic Valve & Manufacturing Company, Elmhurst, Ill. J.E. Lescovich, GA Industries Inc., Cranberry Township, Pa. W.J. Nicholl, GA Industries Inc., Mars, Pa. E.J. Powers, PowerSeal Pipeline Products Corporation, Wichita Falls, Texas J.M. Radtke, Aqua-Dynamic Systems, Wilkes-Barre, Pa. D.L. Smith, APCO Willamette-Valve & Primer Corporation, Schaumburg, Ill. *Liaison, nonvoting Alternate iii

4 Contents All AWWA standards follow the general format indicated subsequently. Some variations from this format may be found in a particular standard. SEC. PAGE SEC. PAGE Foreword I Introduction... v I.A Background... v I.B History... v I.C Acceptance... v II Special Issues... vi III Use of This Standard... vi III.A Purchaser Options and Alternatives... vi III.B Modification to Standard... vii IV Major Revisions... vii V Comments... vii Standard 1 General 1.1 Scope Purpose Application References Definitions Requirements 4.1 Data to Be Supplied by Manufacturer Materials Design Requirements Workmanship and Painting Verification 5.1 Testing Inspection Rejection Delivery 6.1 Marking Preparation for Shipment Affidavit of Compliance... 7 iv

5 Foreword This foreword is for information only and is not a part of AWWA C512. I. Introduction. I.A. Background. This standard describes three types of air valves: airrelease valves, air/vacuum valves, and combination air valves. 1. Air-Release Valves, also called small orifice valves, are designed to automatically release small pockets of accumulated air from a pipeline while the system operates under pressure exceeding atmospheric pressure. 2. Air/Vacuum Valves, also called large orifice valves, are designed to exhaust large quantities of air automatically during pipeline filling and to admit large quantities of air automatically when the internal pressure in the pipeline drops below atmospheric pressure. 3. Combination Air Valves are designed to perform the same function as Air/ Vacuum Valves but, in addition, they will automatically release small pockets of air from the pipeline while under pressure like an Air-Release Valve. I.B. History. The AWWA Standards Committee on Waterworks Air-Release Valves was authorized on Nov. 17, 1984, to respond to a request for a standard on air valves. The first edition of this standard AWWA C512, was approved by the AWWA Board of Directors on Jan. 26, This edition was approved on June 20, I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for all direct and indirect drinking water additives. Other members of the original consortium included the American Water Works Association Research Foundation (AWWARF) and the Conference of State Health and Environmental Managers (COSHEM). The American Water Works Association and the Association of State Drinking Water Administrators (ASDWA) joined later. In the United States, authority to regulate products for use in, or in contact with, drinking water rests with individual states. * Local agencies may choose to impose requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives from such products, state and local agencies may use various references, including 1. An advisory program formerly administered by USEPA, Office of Drinking Water, discontinued on Apr. 7, Specific policies of the state or local agency. 3. Two standards developed under the direction of NSF, ANSI /NSF 60, Drinking Water Treatment Chemicals Health Effects, and ANSI/NSF 61, Drinking Water System Components Health Effects. *Persons in Canada, Mexico, and non-north American countries should contact the appropriate authority having jurisdiction. American National Standards Institute, 11 W. 42nd St., New York, NY NSF International, 3475 Plymouth Rd., Ann Arbor, MI v

6 4. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex, * and other standards considered appropriate by the state or local agency. Various certification organizations may be involved in certifying products in accordance with ANSI/NSF 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdiction. Accreditation of certification organizations may vary from jurisdiction to jurisdiction. Appendix A, Toxicology Review and Evaluation Procedures, to ANSI/NSF 61 does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA final maximum contaminant level (MCL). The MALs of an unspecified list of unregulated contaminants are based on toxicity testing guidelines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Appendix A procedures may not always be identical, depending on the certifier. AWWA C does not address additives requirements. Therefore, users of this standard should consult the appropriate state or local agency having jurisdiction in order to 1. Determine additives requirements, including applicable standards. 2. Determine the status of certifications by all parties offering to certify products for contact with, or treatment of, drinking water. 3. Determine current information on product certification. II. Special Issues. When selecting types of valves, it must be noted that air/ vacuum valves once closed will not reopen to vent air while a pipeline is full and under pressure. To vent air from a pipeline under pressure, an air-release valve or combination air valve is required. III. Use of This Standard. AWWA has no responsibility for the suitability or compatibility of the provisions of this standard to any intended application by any user. Accordingly, each user of this standard is responsible for determining that the standard s provisions are suitable for and compatible with that user s intended application. III.A. Purchaser options and alternatives. This standard includes certain options and alternatives, summarized in the following list, that the purchaser should designate when purchasing valves described in this standard. The purchaser should review each item and make appropriate provisions in specifications to stipulate additional requirements. The following items should be provided in the purchaser s specifications: 1. Standard used that is, AWWA C512-99, Standard for Air-Release, Air/ Vacuum, and Combination Air Valves for Waterworks Service, of latest revision. 2. Valve size. 3. Valve type, air-release valve, air/vacuum, or combination air valve (Sec. 3). 4. Maximum working pressure of each valve. 5. Body inlet configuration, threaded or flanged (Sec ). 6. Valve material of construction (Sec and ). 7. Flanges, if other than flat-faced (Sec ). 8. Cover outlet configuration, threaded, flanged, or hooded (Sec ). 9. Interior protective coating (Sec ). *Both publications available from National Academy of Sciences, 2102 Constitution Ave. N.W., Washington, DC vi

7 10. Special protective coatings, if other than manufacturer s standard primer (Sec ). 11. Records of tests, if specified (Sec. 5). 12. Quantity required. 13. Type of installation (underground, in-plant, in-vault, or outdoor). 14. Warranty statement, if other than manufacturer s standard warranty. 15. Lower test pressure, if specified (Sec and ). 16. Affidavit of compliance, if specified (Sec. 6.3). III.B. Modification to Standard. Any modification to the provisions, definitions, or terminology in this standard must be provided in the purchaser s specifications. IV. Major Revisions. Major changes made to the standard in this revision include the following: 1. The standard was reformatted to conform to the standard AWWA format. 2. Sec. I.C, Acceptance, was added to the foreword. 3. Sec. III, Use of This Standard, was added. 4. Sec. V., Comments, was added to the foreword. 5. Sec. 1.2, Purpose, and Sec. 1.3, Application, were added. 6. The maximum valve size described in this standard was increased from 16 in. (400 mm) to 20 in. (500 mm). V. Comments. If you have any comments or questions about this standard, please call the AWWA Volunteer & Technical Support Group, (303) ext. 6283, FAX (303) , or write to the group at 6666 W. Quincy Ave., Denver, CO vii

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9 American Water Works Association R ANSI/AWWA C (Revision of ANSI/AWWA C512-92) AWWA STANDARD FOR AIR-RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES FOR WATERWORKS SERVICE SECTION 1: GENERAL Sec. 1.1 Sec. 1.2 Sec. 1.3 Scope This standard describes 1 /2-in. (13-mm) through 6-in. (150-mm) air-release valves and 1 /2-in. (13-mm) through 20-in. (500-mm) air/vacuum and combination air valves having gray cast-iron or ductile-iron bodies and covers. The valves are designed for use in water systems with maximum working pressures of 300 psig (2,070 kpa [gauge]) and water temperatures ranging from above freezing to a maximum of 125 F (52 C). Purpose The purpose of this standard is to provide the minimum requirements for airrelease valves, air/vacuum valves, and combination air valves. Application This standard can be referenced in specifications for air-release valves, air/vacuum valves, or combination air-valves. The stipulations of this standard apply when this document has been referenced and then only to air release valves, air/vacuum valves, or combination air valves. 1

10 2 AWWA C SECTION 2: REFERENCES This standard references the following documents. In their latest editions, these documents form a part of this standard to the extent specified in this standard. In any case of conflict, the requirements of this standard shall prevail. ANSI * /ASME B General Purpose Pipe Threads (Inch). ANSI/ASME B16.1 Cast Iron Pipe Flanges and Flanged Fittings, Class 25, 125, 250, and 800. ASTM A48 Standard Specification for Gray Iron Castings. ASTM A126 Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings. ASTM A307 Standard Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength. ASTM A536 Standard Specification for Ductile Iron Castings. ASTM B154 Standard Test Method for Mercurous Nitrate Test for Copper and Copper Alloys. ASTM D395 Standard Test Methods for Rubber Property Compression Set. ANSI/ASTM D471 Standard Test Method for Rubber Property Effect of Liquids. ASTM D1149 Standard Test Method for Rubber Deterioration Surface Ozone Cracking in a Chamber. ASTM D2000 Standard Classification System for Rubber Products in Automotive Applications. ANSI/AWWA C550 Standard for Protective Epoxy Interior Coatings for Valves and Hydrants. SECTION 3: DEFINITIONS The following definitions shall apply in this standard: 1. Air-release valve: A hydromechanical device designed to automatically release to the atmosphere small pockets of air as they accumulate at local high points along a pipeline when the pipeline or piping system is full and operating under pressure. 2. Air/vacuum valve: A direct-acting, float-operated, hydromechanical device designed to automatically release or admit large volumes of air during the filling or draining of a pipeline or piping system. This valve will open to relieve negative pressures and will remain closed and will not reopen to vent air when the system is full and under pressure. *American National Standards Institute Inc., 11 W. 42nd St., New York, NY American Society of Mechanical Engineers, 345 E. 47th St., New York, NY American Society for Testing and Materials, 100 Barr Harbor Dr., West Conshohocken, PA

11 AIR-RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES 3 3. Air flow rate: The quantity of air, expressed in standard cubic feet per minute (cubic metres per minute) or standard cubic feet per second (cubic metres per second), passing through an orifice. 4. Combination air valve: A device having the features of both an air-release valve and an air/vacuum valve. 5. Manufacturer: The party that manufactures, fabricates, or produces materials or products. 6. Maximum working pressure: The maximum pressure at which the valve can continue to function. 7. Orifice: The opening in the valve mechanism through which air is expelled from or admitted into the pipeline or piping system. 8. Orifice sizing: The method for determining the appropriate orifice diameter required for a valve installed in a particular pipeline or piping system. 9. Purchaser: The person, company, or organization that purchases any materials or work to be performed. 10. Valve design pressure: The maximum pressure to which a valve may be subjected without exceeding the allowable stress of any of its components. SECTION 4: REQUIREMENTS Sec. 4.1 Sec. 4.2 Data to Be Supplied by Manufacturer If requested by the purchaser, the manufacturer shall provide the following information when providing valves: Catalog data. The catalog data shall include illustrations, valve performance data, a parts schedule that identifies the materials used for various parts, and a statement of the total net assembled weight for each valve size Certified drawings. A set of certified drawings shall include principal dimensions, construction details, and materials used for all parts of the valve Operating manual. An operating manual shall include the manufacturer s installation and operating instructions, a recommended list of spare parts, and the maintenance procedures. The contents shall be sufficiently detailed to direct the assembly and disassembly of the valve and for the ordering of parts. Materials Physical and Chemical Requirements. The physical and chemical requirements of the components of air-release, air/vacuum, and combination air valves shall be as required by ANSI, AWWA, ASME, and ASTM standards referenced in this standard. Whenever valve components are made to conform to ANSI, AWWA, ASME, or ASTM standards that include test requirements or testing procedures, the valve manufacturer shall comply with the requirements and procedures. The records of all tests shall be made available to the purchaser upon request Gray cast iron. Gray cast iron shall equal or exceed the requirement of ASTM A126, Class B, or ASTM A48, Class Brass or bronze. Valve components of brass or bronze shall be made to ASTM or Copper Development Association (CDA) * recognized alloy standard *Copper Development Association, P.O. Box 1840, Greenwich, CT

12 4 AWWA C specifications. Any bronze alloy used in the cold-worked condition shall pass the mercurous nitrate test in accordance with ASTM B154 to minimize susceptibility to stress corrosion Bronze parts subject to wetting by line contents shall be made of low-zinc alloys containing less than 16 percent zinc. If aluminum bronze is used, the alloy shall be inhibited against dealuminization using a temper anneal at 1,200 F ±50 F (650 C ±28 C) for 1 h per in. (25.4 mm) of section thickness, followed by cooling in moving air or by water quenching. The 1986 amendments to the US Safe Drinking Water Act (SDWA) limit materials used for wetted pipe fittings to a maximum 8 percent lead Cover bolting. Bolting materials shall equal or exceed the minimum physical strength requirements of ASTM A307, unless otherwise specified by the purchaser Ductile iron. Ductile iron shall equal or exceed the requirements of ASTM A536, Grade Elastomers. Elastomers shall comply with the following: Rubber shall be resistant to microbial attack, copper poisoning, and ozone attack Rubber 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 Rubber compounds shall be capable of withstanding an ozone-resistance test when tested in accordance with ASTM D1149. The tests shall be conducted on the unstressed samples for 70 h at 104 F (40 C) with an ozone concentration of 0.5 ppm; and there shall be no visible cracking in the surfaces of the test samples after tests Rubber compounds shall have a maximum compression set value of 18 percent when tested in accordance with ASTM D395, Method B, for 22 h at 158 F (71 C) Rubber compounds shall be free of vegetable oils, vegetable oil derivatives, animal fats, and animal oils Rubber compounds shall contain no more than 1.5 parts wax per 100 parts of rubber hydrocarbon and shall have less than a 2 percent volume increase when tested in accordance with ANSI/ASTM D471 after being immersed in distilled water at 73.4 F ±2 F (23 C ±1 C) for 70 h. Reclaimed rubber shall not be used Gaskets. Gasket material shall be made of rubber composition or paper that is free of asbestos or corrosive ingredients. O-rings or other suitable elastomeric seals may be used for gaskets O-rings. O-rings shall be compounded to meet ASTM D2000 and have physical properties suitable for the application. Sec. 4.3 Design Requirements Allowable stress. The allowable stress at valve design pressure shall not exceed one third of the yield strength or one fifth of the ultimate strength of materials used Venting. Air-release valves and the air-release mechanism of combination air valves shall be designed to open positively and vent air to the atmosphere at system pressures up to the maximum working pressure as required by the venting orifice size.

13 AIR-RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES Body and cover Material of construction. Bodies and covers shall be of gray cast iron (ASTM A126, Class B, or ASTM A48, Class 35) or ductile iron (ASTM A536, Grade ) and shall have threaded or flanged connections as required by the purchaser Inlet and outlet ports. The body inlet port and the cover outlet port for air/vacuum valves and combination air valves shall be sized to ensure that the minimum flow area of each port shall be equal to or greater than the flow area of a circle of diameter equal to the nominal valve size Valve connections. Valve connections shall conform to the following specifications: Flanged ends. Flange dimensions and drilling shall conform to ANSI/ ASME B16.1, Class 125 or Class 250 except all flanges shall be flat-faced unless otherwise specified by the purchaser Threaded ends. Threaded connections shall conform to the specifications for tapered pipe threads for general use, National Pipe Threads (NPT) per ANSI/ASME B Floats. For valves with inlet sizes less than 4 in. (100 mm), the float shall be capable of withstanding a collapse pressure of 1,000 psig (6,900 kpa [gauge]). For inlet sizes 4 in. (100 mm) and larger, the float shall be capable of withstanding collapse pressures of 750 psig (5,180 kpa [gauge]) Gaskets. Gaskets shall be used on all flanged joints and shall comply with Sec Orifices Air-release valve orifice. The orifice shall be suitable for the volume of air that accumulates in the system at the maximum working pressure. The orifice size is specific to the system application Air/vacuum valve orifice. The orifice shall be suitably sized, using the manufacturer s sizing data, to permit the required air flow rate to be discharged or admitted Cover bolting. Unless otherwise required by the purchaser, bolts, studs, and nuts shall comply with Sec Seats. Valve seats made of elastomeric materials shall be designed with a hard material selected for watertight shutoff (zero leakage) and long-term service at a minimum pressure of 20 psig (138 kpa [gauge]). Valve seat design shall permit easy removal and replacement in the field Special fittings Drain/test port. All valves with a 1-in. (25-mm) diameter or larger inlet shall have a 1 /4-in. (6-mm) NPT minimum plugged drain/test port located near the bottom of the valve body and a plugged test port near the top of the valve Other. An air-release valve and an air/vacuum valve assembled with interconnecting piping shall have pipe and fittings of sufficient size to prevent clogging and entrapment of foreign materials. The piping between the air/vacuum valve and the air-release valve shall be installed to allow air to rise to the air-release inlet. When required, a shutoff valve isolating the two valves shall be provided Valve trim materials. Unless otherwise required by the purchaser, valve trim material shall be inherently corrosion resistant and shall be the manufacturer s standard material.

14 6 AWWA C Valve outlet. Valve outlets shall be threaded, flanged, or hooded (or protected with another shielding device that is positively anchored to the valve cover). Sec. 4.4 Workmanship and Painting Workmanship. All workmanship employed in the fabrication and assembly of valves manufactured in accordance with this standard shall ensure that the valves function as designed Interchangeable parts. Valve parts shall be designed with manufacturing tolerances set to provide interchangeability in the products of any one manufacturer between units of the same size and type Castings. All castings shall be clean and sound without defects that will impair their service. Plugging, welding, or repairing of these defects will not be allowed. Internal surfaces of the casting shall be smooth and free of sharp corners Painting Internal surfaces. Interior surfaces of the valve body shall be clean, smooth, and shall not be coated unless required by the purchaser Internal protective coating. If an internal protective coating is required by the purchaser, all wetted parts, except machined or bearing surfaces, and corrosion-resistant components shall be coated in accordance with ANSI/AWWA C External surfaces. Unless otherwise required by the purchaser, exterior cast-iron surfaces of each valve shall be coated with the manufacturer s standard primer. SECTION 5: VERIFICATION Sec. 5.1 Testing Before the application of any external coating, the completely assembled valve shall be hydrostatically tested to ensure proper operation. If an internal coating is required by the purchaser, the hydrostatic shell test of the body and cover is permitted before assembly to establish the integrity of the body and cover castings prior to applying the internal coating. After the internal coating is applied, the assembled valve shall be hydrostatically tested as outlined below Shell test. With the valve completely closed, an internal hydrostatic pressure equal to 150 percent of the maximum working pressure shall be applied. During the test there shall be no evidence of leakage through the valve, nor shall any part show evidence of permanent damage or distortion. The duration of the hydrostatic test shall be sufficient to allow visual examination for leakage and shall be at least 1 minute for valves 8 in. (200 mm) and smaller and 3 minutes for valves 10 in. (250 mm) through 20 in. (500 mm) Air-release valve seat leakage test Each valve shall be tested at two internal hydrostatic pressures: (1) a minimum pressure of 20 psig (138 kpa [gauge]), unless otherwise specified by the purchaser; and (2) a maximum pressure equal to 150 percent of the maximum working pressure of the valve with the opposite end, or outlet of the valve, open to atmosphere. The duration of each test shall be at least 30 seconds. At the test pressures, the valve shall be drop-tight (zero leakage).

15 AIR-RELEASE, AIR/VACUUM, AND COMBINATION AIR VALVES After completing the hydrostatic test, each valve shall be opened and closed three times using water at 20 psig (138 kpa [gauge]) or at a lower pressure if specified by the purchaser, to activate the float and float mechanism. During the test, each valve shall seal drop-tight Air/vacuum valve and combination air valve seat leakage test Each valve shall be tested at two internal hydrostatic pressures: (1) a minimum pressure of 20 psig (138 kpa [gauge]), unless otherwise specified by the purchaser; and (2) a minimum pressure equal to 150 percent of the maximum working pressure of the valve with the opposite end, or outlet of the valve, open to atmosphere. The duration of each test shall be at least 30 seconds. At the test pressures, the valve shall be drop-tight (zero leakage) During the low-pressure test the float or plug shall be rotated four times in 90 increments. There shall be no evidence of leakage in any of the test positions. Sec. 5.2 Sec. 5.3 Inspection All work performed according to this standard shall be subject to inspection by the purchaser Plant inspection. The purchaser shall have access to all places of manufacture where materials are produced or fabricated and where tests are conducted and shall be able to inspect the facilities and observe the tests. Rejection Any valve, or valve part, that does not comply with the requirements of this standard shall be rejected. SECTION 6: DELIVERY Sec. 6.1 Sec. 6.2 Sec. 6.3 Marking Each valve shall be marked by body markings or a corrosion-resistant nameplate, or both, that clearly indicate the manufacturer s name or trademark, size of the valve, and the designation of the maximum working pressure rating of the valve for water service. Preparation for Shipment Valves shall be complete in all details when shipped. All cavities shall be drained of water to protect from freezing. The openings shall be covered to prevent entry of foreign material, and the threads shall be protected. The manufacturer shall carefully prepare the valves for shipment. Valves shall be fully packaged or attached to pallets at the manufacturer s option. Affidavit of Compliance The manufacturer shall, when required by the purchaser, provide an affidavit to the purchaser stating that the valve and all materials used in its construction conform to the applicable requirements of this standard and the purchaser s specifications, and that all tests specified in this standard have been performed and that all test requirements have been met.

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