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1、The Authoritative Resource for Safe Drinking WaterSM ANSI/AWWA C700-02 (Revision of ANSI/AWWA C700-95) AWWA Standard Effective date: Jan. 1, 2003. First edition approved by AWWA Board of Directors June 9, 1921. This edition approved June 16, 2002. Approved by American National Standards Institute: O
2、ct. 11, 2002. Cold-Water Meters Displacement Type, Bronze Main Case Advocacy Communications Conferences Education and Training ?Science and Technology Sections 6666 West Quincy Avenue Denver, CO 80235-3098 T 800.926.7337 www.awwa.org Copyright 2002 American Water Works Association, All Rights Reserv
3、ed. Approved by American National Standards Institute: May 21, 2002. 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
4、 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 a
5、ny 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 withd
6、raws 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 Am
7、erican 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 prec
8、lude 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.
9、 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 Americ
10、an 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 stan
11、dard 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, 25 W. 43rd St., Fourth Floor, New York, NY 10036; (212) 642-4900. Science and Techno
12、logy AWWA unites the drinking water community by developing 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 f
13、or water and wastewater utilities. 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 r
14、eview purposes, without the written permission of the publisher. Copyright 2002 by American Water Works Association Printed in USA Copyright 2002 American Water Works Association, All Rights Reserved. Approved by American National Standards Institute: May 21, 2002. iii Committee Personnel The AWWA S
15、ubcommittee on Displacement-Type Meters, Bronze Main Case, which developed this standard, had the following personnel at the time: Michael J. Kebles, Chair J.W. Benson, Memphis Light Gas typical examples are provided. 4.1.1.1Materials.* Materials shall be selected for their strength and resistance t
16、o corrosion and shall not impart to the water objectionable taste or odor, nor toxic substances in normalized concentrations exceeding the maximum contaminant levels (MCLs) as defined by the US Environmental Protection Agency (USEPA). 4.1.2Pressure casings.Water meter main cases shall be made of a c
17、opper alloy containing not less than 75 percent copper, such as UNS C84400, UNS C83600, or UNS C89520, or a similar copper alloy as listed in ASTM B584. All materials used in the construction of meter main cases shall have sufficient dimensional stability to retain operating clearances at working te
18、mperatures up to 105F (40C) and shall not permanently warp or deform when exposed to temperatures up to 150F (66C) for 1 hr. 4.1.3Register-box rings and lids.Register-box rings and lids shall be made of a copper alloy containing not less than 57 percent copper, such as UNS C85700 or UNS C86200, or a
19、 similar copper alloy as listed in ASTM B584 or UNS C85800 as listed in ASTM B176; or a suitable engineering plastic, such as polycarbonate (PC) per ASTM D3935, acetal per ASTM D4181, nylon (N) per ASTM D4066, or propylene per ASTM D4101. All materials used in the construction of register-box rings
20、and lids shall have sufficient dimensional stability to retain operating clearances at working temperatures up to 105F (40C) and shall not permanently warp or deform when exposed to temperatures up to 150F (66C) for 1 hr. 4.1.4Measuring chambers.Measuring chambers shall be made of a copper alloy con
21、taining not less than 85 percent copper, such as UNS C92200 as listed in ASTM B61, UNS C83600 as listed in ASTM B62 or UNS C89520 as listed in ASTM B584; or a suitable engineering plastic, such as polyethylene per ASTM D1248, polyphenylene oxide (PPO) per ASTM D2874, polystyrene per *The US Safe Dri
22、nking Water Act (SDWA) limits the lead content in materials used for wetted pipe fittings. Copyright 2002 American Water Works Association, All Rights Reserved. Approved by American National Standards Institute: May 21, 2002. -,-,- 6AWWA C700-02 ASTM D4549, styrene-acrylonitrile (SAN) per ASTM D4203
23、, or polyphenylene sulfide (PP) per ASTM D4067. Measuring chambers shall have sufficient dimensional stability to retain operating clearances at working temperatures up to 80F (27C) and shall not warp or deform when exposed to operating temperatures of 100F (38C). 4.1.5Pistons and discs.Pistons and
24、discs shall be such that the specific gravity approximately equals that of water and shall be made of a vulcanized hard rubber, such as those classified per ASTM D2135; or a suitable engineering plastic, such as polystyrene per ASTM D4549, polyphenylene sulfide (PPS) per ASTM D4067, styrene-acryloni
25、trile (SAN) per ASTM D4203, polyphenylene oxide (PPO) per ASTM D2874, or polycarbonate (PC) per ASTM D3935. Pistons and discs shall have sufficient dimensional stability to retain operating clearances at working temperatures up to 80F (27C) and shall not warp or deform when exposed to operating temp
26、eratures of 100F (38C). 4.1.6Measuring-chamber diaphragms.Measuring-chamber diaphragms shall be made of monel, such as UNS N04400 as listed in ASTM B127; phosphor bronze as listed in ASTM B103; or austenitic stainless steel as listed in ASTM A167; a hard rubber as classified per ASTM D2135; or a sui
27、table engineering plastic, such as nylon (N) per ASTM D4066, polyphenylene sulfide (PPS) per ASTM D4067, polyphenylene oxide (PPO) per ASTM D2874, or styrene-acrylonitrile (SAN) per ASTM D4203. Measuring-chamber diaphragms shall have sufficient dimensional stability to retain operating clearances at
28、 working temperatures up to 80F (27C) and shall not warp or deform when exposed to operating temperatures of 100F (38C). 4.1.7Piston/disc spindles, thrust rollers, and thrust-roller bearing plates. Piston/disc spindles, thrust rollers, and thrust-roller bearing plates shall be made of monel UNS N044
29、00 per ASTM B164; phosphor bronze per ASTM B139; austenitic stainless steel as listed in ASTM A276; vulcanized hard rubber as classified per ASTM D2135; or a suitable engineering plastic, such as polycarbonate (PC) per ASTM D3935, polyphenylene sulfide (PPS) per ASTM D4067, or thermoplastic polyeste
30、r (TPES) per ASTM D4507. Piston/disc spindles, thrust rollers, and thrust-roller bearing plates shall have sufficient dimensional stability to retain operating clearances at working temperatures up to 80F (27C) and shall not warp or deform when exposed to operating temperatures of 100F (38C). Copyri
31、ght 2002 American Water Works Association, All Rights Reserved. Approved by American National Standards Institute: May 21, 2002. COLD-WATER METERSDISPLACEMENT TYPE, BRONZE MAIN CASE7 4.1.8Register gear trains.Frames, gears, and pinions of gear trains shall not be exposed to water and shall be made o
32、f metals such as copper alloys per ASTM B16, brass alloys per ASTM B36, silicon-bronze alloys per ASTM B98; or any copper-based alloys per ASTM F467 and ASTM F468; stainless steel, such as those listed in ASTM A276, ASTM A493, and ASTM A582; or suitable engineering plastics, such as acrylonitrile-bu
33、tadiene-styrene (ABS) per ASTM D4673, polycar- bonate (PC) per ASTM D3935, thermoplastic polyester (TPES) per ASTM 4507, polystyrene (PS) per ASTM D4549, or acetal per ASTM D4181. Register gear trains shall have sufficient dimensional stability to retain operating clearances at working temperatures
34、up to 80F (27C) and shall not warp or deform when exposed to operating temperatures of 100F (38C). 4.1.9Covers, top or bottom.If engineering plastic materials are used in the manufacture of top or bottom covers, only virgin or first-generation grade, rigid engineering plastic materials compounded wi
35、th ultraviolet stabilizers shall be used. Engineering plastic covers, top or bottom, shall have sufficient dimensional stability to retain operating clearances at working temperatures up to 105F (40C) and shall not permanently warp or deform when exposed to temperatures up to 150F (66C) for 1 hr. Br
36、eakable and nonbreakable top or bottom covers, as specified in the purchasers specifications, shall be as follows: 4.1.9.1Breakable.Breakable covers (frost-protection devices) shall be made of cast iron, such as those listed in ASTM A48, ASTM A126, or ASTM A159; austenitic stainless steel, such as t
37、hose listed in ASTM A167; a copper alloy containing not less than 75 percent copper, such as UNS C84400 as listed in ASTM B584; or a suitable engineering plastic, such as polycarbonate (PC) per ASTM D3935, polyphenylene sulfide (PPS) per ASTM D4067, nylon (N) per ASTM D4066, or thermoplastic polyest
38、er (TPES) per ASTM D4507. The design and composition of such components will be such that they will satisfy the break or yield requirements stated in Sec. 4.2.9. Meters equipped with frost-protection devices can cause flooding to occur due to frost-protection devices yielding or fracturing, as indic
39、ated in AWWA Manual M6, Water MetersSelection, Installation, Testing, and Maintenance. 4.1.9.2Nonbreakable.Nonbreakable covers shall be made of austenitic stainless steel, such as those listed in ASTM A167; a copper alloy containing not less than 75 percent copper, such as UNS C84400 as listed in AS
40、TM B584; or a suitable engineering plastic, such as polycarbonate (PC) per ASTM D3935, polyphenylene Copyright 2002 American Water Works Association, All Rights Reserved. Approved by American National Standards Institute: May 21, 2002. 8AWWA C700-02 sulfide (PPS) per ASTM D4067, nylon (N) per ASTM D
41、4066, or thermoplastic polyester (TPES) per ASTM D4507. The design and composition of these components shall be such that they will satisfy the break or yield requirements stated in Sec. 4.2.9. 4.1.10External-case closure fasteners.External fasteners shall be made of a copper alloy containing not le
42、ss than 57 percent copper, such as the wrought alloys covered by ASTM B16 (for example, UNS C36000), a brass alloy, such as UNS C27200 as listed in ASTM B36, a silicon-bronze alloy as listed in ASTM B98, any of the copper-based alloys specified for general fastener use in ASTM F467 or ASTM F468; or
43、stainless steels of the austenitic, ferritic, or martensitic types as listed in ASTM A276, ASTM A493, and ASTM A582. Fasteners for nonpressure containment assemblies may be made of a suitable engineering plastic, such as polycarbonate (PC) per ASTM D3935, nylon (N) per ASTM D4066, acetal per ASTM D4
44、181; or any of the aforementioned copper-based or stainless-steel materials. 4.1.11Coupling tailpieces and nuts.Coupling tailpieces and nuts shall be made of copper alloys containing not less than 75 percent copper, such as UNS C84400 or UNS C93200, or a similar copper alloy as listed in ASTM B584;
45、or, when so specified by the purchasers specifications, of a suitable virgin-grade engineering plastic, such as polycarbonate (PC) per ASTM D3935, nylon (N) per ASTM D4066, or polyphenylene sulfide (PPS) per ASTM D4067. 4.1.12Companion flanges.Companion flanges shall be made of cast iron, such as th
46、ose listed in ASTM A48, ASTM A126, or ASTM A159; or, when so specified by the purchasers specifications, of a copper alloy containing not less than 75 percent copper, such as UNS C84400 or UNS C93200, or a similar copper alloy as listed in ASTM B584; or, when so specified by the purchasers specifica
47、tions, of a suitable virgin-grade engineering plastic. Sec. 4.2General Design 4.2.1Size.The operating and physical characteristics listed in Tables 1 and 2 shall determine the nominal size of meters. 4.2.2Capacity.*The nominal capacity ratings and the related pressure-loss limits shall be the same a
48、s those listed in Table 1 for the safe maximum operating capacities. *See Sec. B.3. Copyright 2002 American Water Works Association, All Rights Reserved. Approved by American National Standards Institute: May 21, 2002. COLD-WATER METERSDISPLACEMENT TYPE, BRONZE MAIN CASE9 Table 1Characteristics of d
49、isplacement-type meters Meter Size Safe Maximum Operating Capacity Maximum Pressure Loss at Safe Maximum Operating Capacity Recommended Maximum Rate for Continuous Operations* *See Sec. B.5.1. Minimum Test Flow See Sec. 4.2.8. Normal Test Flow Limits Maximum Number of Disc Nutations or Piston Oscillations per in. (mm) gpm (m3/h) psi (kPa) gpm (m3/h) gpm (m3/h) gpm (m3/h) 10 gal ft3(0.01m3) 1/2 (13) 15 (3.4) 15 (103) 7.5 (1.7) 1/4 (0.06) 115 (0.23.4) 875 657 (231) 1/2 3/4 (13 20) 15 (3.4)