1、ANSI B109.2 Approved April 13,2000 DIAPHRAGM-TYPE GAS DISPLACEMENT METERS (500 Cubic Feet Per Hour Capacity and Over) Secretariat 6 AGA American Gas Association 400 North Capitol Street, NW, 4h Floor Washington, DC 20001 U.S.A. Catalog No. XQooos June 2000 STDmAGA B109.2-ENGL 2000 9008836 0001350 12
2、5 First Edition-1973 Second Edition-I986 Third Edition-1992 Fourth Edition-2000 American Gas Association 400 North Capitol St., NW, 4 Floor Washington, DC 20001 U.S.A. Catalog No. XQooos Approved April 13,2000 AMERICAN NATIONAL STANDARDS INSTITUTE, INC. Copyright O 2000, American Gas Association AU
3、rights reserved CONTENTS CONTENTS i DISCLAIMER AND COPYRIGHT . ui PREFACE . iv HISTORY OF THE DEVELOPMENT OF THIS STANDARD v ACCREDITED STANDARDS COMMITTEE B109 _ vi SCOPE . 1 PART I . 2 DEFINITIONS -. 2 PART II . 7 2.1 SCOPE . 7 2.2 DIMENSIONS . 7 2.3 METER IDENTIFICATION . 9 2.4 DIAPHRAGM IDENTIFI
4、CATION . 10 2.5 INLET IDENTIFICATION 10 2.6 PROTECTION OF METERS 10 2.7 METER INDEX 10 2.8 CORROSION AND CHEMICAL RESISTANCE OF INTERNAL PARTS 11 2.9 CORROSION AND CHEMICAL RESISTANCE OF EXTERNAL PARTS . 11 2.10 METER INDEX WINDOW IMPACT RESISTANCE . 12 2.11 METERINDEX WINDOW CLEARNESS TEST 12 2.12
5、TEMPERATURE AND THERMAL SHOCK RESISTANCE . 12 2.13 STRENGTH OF METER CONNECTIONS . 13 PART III 14 14 3.1 SCOPE . 14 3.2 METER CLASSES 14 3.3 ACCURACY OF METERS . 16 3.4 METER CASE PRESSURE TEST 17 3.5 PRESSURE AND LEAK TESTS . 18 3.6 NOISE AND VIBRATION . 18 PART IV . 19 IN-SERVICE PERFORMANCE . 19
6、4.1 SCOPE . 19 4.2 TEST CONDITIONS . 19 4.3 IN-SERVICE PERFORMANCE PROGRAMS 19 4.4 RECORDS . 20 PART V . 21 METER INSTALLATION - . 21 5.1SCOPE . 21 5.2 GENERAL . 21 5.3 LOCATION . 21 5.4 INSTALLATION 21 5.5 ON-SITE INSPECTION 22 5.6 SPECIAL SERVICE 22 PART VI 23 AUXILIARY DEVICES FOR GAS METERS . 23
7、 6.1 SCOPE . 23 6.2 PRESSURE SYSTEM . 24 6.3 TEMPERATURE SYSTEMS 25 6.4 VOLUME INDICATOR . 27 6.5 INSTRUMENT CHART DRIVES 27 6.6 CIRCULAR CHARTS . 27 6.7 RECORDERS 29 CONSTRUCTION REQUIREMENTS FOR QUALIFYING NEW-TYPE METERS 7 PERFORMANCE REQUIREMENTS FOR QUALIFYING NEW-TYPE METERS . i STD-AGA BL09-2
8、-ENGL 2000 H 900883b 0003352 TTB 6.8 AUTOMATIC INTEGRATORS . 6.9 CONSTANT-PRESSURE-COMPENSATING INDEX . 6.10 REMOTE METER READING DEVICES 6.1 1 INSTRUMENT ADAPTOR PLATES . 6.12 INSPECTION AND TESTING CLASSIFICATION PART VII TEST METHODS AND EQUIPMENT 7.1 SCOPE . 7.2 MEASUREMENT REFERENCE BASE 7.3 UN
9、ITS OF MEASURE 7.4 BASE CONDITIONS 7.5 METER TESTING SYSTEMS . 7.6 CALIBRATION OF METER TESTING SYSTEMS APPENDIX A CONNECTION DIMENSIONS, NOMINAL . APPENDIX B THREAD SPECIFICATIONS . APPENDIX C GENERAL SERVICE CAPACITY EQUATION APPENDIX D METER ACCURACY APPENDIX E PROVER BELL CALIBRATION BY PHYSICAL
10、 MEASUREMENT APPENDIX F 31 31 32 33 33 35 35 35 35 35 35 36 38 41 41 42 42 43 43 45 45 46 46 49 BAR CODE FOR METERS AND AUXILIARY DEVICES . 49 ii STD.AGA BL03-2-ENGL 2000 900883b 0001353 93Y m DISCLAIMERS AND COPYRIGHT Nothing contained in this ANSI standard is to be construed as granting any right,
11、 by implication or otherwise, for the manufacture, sale or use in connection with any method, apparatus or product covered by letters patent, or os insuring anyone against liability for infringement of letters patent. This standard may be used by anyone desiring to do so. Efforts have been made to e
12、nsure the accuracy and relabiliv of the data contained in this publication; however, ANSI and AGA make no representation, warranty or guarantee in connection with this standard and hereby expressly disclaim any liability or responsibility for loss or for any violation of any federal, stare or munici
13、pal regulation with which this standard may conflict; or for the infringement of any patent from the use of this standard. Nothing contained in this standard should be viewed as an endorsement by ANSI/AGA of any partcular manufacturers products. Permission is granted to republish material herein in
14、laws or ordinances, and in regulations, ndministrative orders, or similar documents issued by public outhorities. Those desiring permission for other publication should consult the Operating and Engineering Section, American Gas Association, 400 North Capitol Street, NW, 4* Floor, Washington, DC 200
15、01, U.S.A. Copyright 02000 American Gas Association, All Rights Reserve i STDeAGA BLOS-Z-ENGL 2000 700883b 0001354 870 PREFACE This publication represents a basic standard for safe operation, and substantial and durable construction for diaphragm-type gas displacement meters having a gas flow rating
16、 of 500 cubic feet per hour capacity (14.16 m3h) and over at 0.5 inch water column (125 Pa) differential pressure at standard conditions. This work is the result of years of experience, supplemented by extensive research. The standard is designed to help ensure efficient performance and substantial
17、construction of equipment. It is recognized that during any transition period to the metric system, sizes and dimensions need to be expressed in either the metric system or the inch-pound system or in both. In this document, both systems are used, with the inch-pound units given preference. In most
18、cases, a soft conversion from existing inch-pound values is shown. Soft conversion implies a change in nomenclature only; in this document, the alternative nomenclatures (metric and inch-pound) are shown by using parentheses and can be used interchangeably. Hard conversion is used to express metric
19、values in (closely equivalent) round inch-pound units. Bracketed values are not to be used interchangeably with the corresponding metric values. Nothing in this standard is to be considered as in any way indicating a measure of quality beyond compliance with the provisions it contains. It is designe
20、d to allow the construction and performance of displacement meters that may exceed the various provisions specified in any respect. In its preparation, recognition was intended to be given to the possibility of improvement through ingenuity of design. As progress takes place, revisions may become ne
21、cessary. When they are believed desirable, recommendations should be forwarded to the Chairman of ANSI B109 Committee, Operating and Engineering Section, American Gas Association, 400 North Capitol Street, NW, 4Ih Floor, Washington, DC 20001, U.S.A. Users of this document should consult applicable f
22、ederal, state and local regulations. The American Gas Association (AGA) does not, by the publication of this document, intend to present specifications that are not in compliance with applicable rules, and this document may not be construed as doing so. NOTICE: This American National Standard may be
23、 revised or withdrawn at any time. The procedures of the American National Standards Institute, Inc. (ANSI) require that action be taken to reaffirm, revise or withdraw this standard no later than five years from the date of publication. When any revisions are deemed advisable, recommendations shoul
24、d be forwarded to the American Gas Association. A form is included for that purpose at the end of this standard. Purchasers of Amencan National Standards may receive current information on all standards by writing to the American National Standards Institute, Inc., 11 West 42nd Street, New York, NY
25、10036, U.S.A.; by calling (212) 642-4900; by faxing ANSI at (212) 398-0023; or by visiting ANSIs World Wide Web site at http:/www.ansi.org. To purchase additional copies of this standard, contact: AGA Distribution Center, P.O. Box 79230, Baltimore, MD 21279-0230; Fax: (301) 206-9789; Phone: (301) 61
26、7-7819 or go to AGAS web page at www.aga.org/catalog. iv STD.AGA Bl09.2-ENGL 2000 9 9008836 aODL355 707 M HISTORY OF THE DEVELOPMENT OF THIS STANDARD Following approval in 1973 of the Standard for Gas Displacement Meters (Under 500 Cubic Feet per Hour Capacity), ANSI B109.1, a subcommittee was appoi
27、nted to develop a standard covering gas displacement meters with capacities of 500 cubic feet per hour and over. Six drafts of the standard were prepared and reviewed by the subcommittee before a final draft was prepared and submitted to American National Standards Committee BI09 for its considerati
28、on on June 14, 1979. Subsequent to adoption by the committee, the first edition of the standard for gas displacement meters (500 cubic feet per hour capacity and over) was approved as an American National Standard by the American National Standards Institute, Inc., on April 14, 1980. The second edit
29、ion was approved on January 9, 1987, and included a new part on auxiliary devices for gas meters, plus M informative Appendix on bar coding. In the third edition. minor editorial changes and a title correction were made. The third edition was approved on November 12, 1992. This is the fourth edition
30、 of standard B109.2, in which several additionddeletions have been made to avoid any ambiguity, to make it more consistent and to improve upon some requirements. Substantive changes have been shown by a bar I J in the margin. V STD-AGA BIOS-2-ENGL 2000 I 300883b 000L35b b43 W ACCREDITED STANDARDS CO
31、MMITTEE B109 GREGORY S. VERAA, Chairman DAVID F. KEE. Vice Chairman Ali M. Quraishi, Administrative Secretary (Non-Voting) REPRESENTING AMERICAN GAS ASSOCIATION (AGA): Cathy Chang Winston Meyer Gregory S. Vem REPRESENTING AMERICAN PUBLIC GAS ASSOCIATION (APGA): Essa Rhebi REPRESENTING AMERICAN SOCIE
32、TY OF MECHANICAL ENGINEERS (ASME): James C. Devore REPRESENTING FEDERAL ENERGY REGULATORY COMMISSION (FERC): Chris M. Zerby REPRESENTING GAS APPLIANCE MANUFACTURERS ASSOCIATION (GAMA): David F. Kee REPRESENTING GAS METER MANUFACTURERS: Donald A. Jones Paul Adams Richard A. Sallee Dane L. Ehnch Jerry
33、 Kamaiieh Vacant REPRESENTING NATIONAL ASSOCIATION OF REGULATORY UTILITY COMMISSIONERS (NARUC): Donald J. Surma John P. Zekoil REPRESENTING NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST): George Mattingly REPRESENTING NATIONAL PROPANE GAS ASSOCIATION (NPGA): Bruce Swieciki INDIVIDUAL MEMBER T
34、homas J. Coaes vi STD.AGA B309-2-ENGL aCICl0 m 90081336 0003357 58T SCOPE This standard applies to diaphragm-type gas displacement meters, designed for revenue measurement of fuel gas, having a flow rating of 500 cubic feet per hour (14.16 m ni) capacity and over at 0.5 inch water column (125 Pa) di
35、fferential pressure at standard conditions. 3 Part I comprises a list of definitions and terms used throughout the standard. Part 11 covers the construction requirements for qualifying new-type meters in the designated flow-rate ranges. Part III covers the performance requirements for qualifying new
36、-type meters in the designated flow-rate ranges. Part IV covers the “in-service” performance requirements for diaphragm-type meters in the designated flow-rate ranges. Part V addresses installation requirements for these meters. Part VI pertains to auxiliary devices used with meters covered by this
37、standard. Part VI1 covers test methods and equipment 1 STD-AGA BLOS-2-ENGL 2000 900883b OOOL358 4Lb PART I DEFINITIONS 1.1 ACCURACY, METER. The degree to which a meter correctly measures the volume of gas passing through it, determined by comparing the volume registered by the meter with that regist
38、ered by the prover. (See Appendix D for methods of expressing meter accuracy.) 1.2 ADAPTOR PLATE, INSTRUMENT. A specially designed plate mounted between a meter and an instrument to provide for a proper drive to the instrument. 1.3 AUTOMATIC INTEGRATORS 1.3.1 Recording Type. This type of automatic i
39、ntegrator is equipped with corrected and uncorrected volume counters and a chart to record the time, pressure or temperature, or combinations thereof. 1.3.2 Non-Recording Type. This type of automatic integrator is equipped with corrected and uncorrected volume counters. 1.3.3 Automatic Integrating D
40、evice for Pressure. An automatic integrating device for pressure is an auxiliary device designed to automatically correct a volume-related input to some predetermined base pressure condition. 1.3.4 Automatic Integrating Device for Temperature. Automatic integrating device for temperature is an auxil
41、iary device designed to automatically correct a volume-related input to some predetermined base temperature condition in accordance with Charles Law. 1.3.5 Automatic Integrating Devices for Pressure and Temperature. An automatic integrator device for pressure and temperature is an auxiliary device d
42、esigned to automatically correct a volume-related input to some predetermined base pressure and base temperature condition in accordance with Boyles Law and Charles Law. 1.4 AUXILIARY DEVICES. Devices used with a meter to provide an adjustment of the meter reading, to permit obtaining special inform
43、ation, or to transmit information to a remote location. 1.5 BADGE. A permanent plate, affixed in a conspicuous place on a meter, containing basic meter information. 1.6 BASE CONDITIONS. The standard base conditions of pressure and temperature for the volumetric measurement of natural gas, ANSVAPI 25
44、62-1969, has established 60F (156C) and 14.73 psi (101.56 Wa) as the base temperature and pressure to which ail volumes are commonly referred. 1.7 BOITLE, CUBIC FOOT. A specially constructed and calibrated bottle, usually immersion type, complete with an immersion tank containing a light oil of low
45、vapor pressure, with the bottle suspended over the tank by means of a suitable cord and pulley so that the bottle may be immersed in the oil between two graduations, top and bottom. The bottle is constructed so that exactly 1 cubic foot of air is displaced when the bottle is immersed between the two
46、 marks. Tbe calibration of the bottle must be traceable to the National Bureau of Standards. 1.8 CAPACITY, RATED. The capacity obtained by rounding to the nearest multiple of 5 cfh. The average readings of 10 randomly chosen production-type meters representing a particular meter mudel. 1.9 CIRCULAR
47、CHARTS. A circular chart is a piece of paper, or other suitable material, with graduated lines upon which a pen or stylus draws a record indicating the variables being measured. 1.10 CIRCLE), READING. Graduated index circles with hands that register the accumulated volume of gas passed through the m
48、eter. 1.11 CIRCLE(S), TEST. A graduated circle provided with a rotating pointer (proving hand) on the meter index, used for testing the meter and for indicating gas flow. Also referred to as index test dial or proving circle. 1.12 CONNECTIONS, METER. The integral parts of the meter designed for atta
49、chment to meter swivels, pipe or other piping components. 2 STD-AGA BL09.2-ENGL ZOO0 90OB83b 0001359 352 H 1.13 CONSTANT-PRESSURE-COMPENSATING INDEX. An index used in conjunction with a gas meter operated at a constant pressure, other than the contract base pressure, to indicate gas volume corrected to a contract base pressure. 1.14 CUBIC FOOT, METERED. The quantity of gas that occupies 1 cubic foot when under pressure and temperature conditions existing in the meter. 1.15 CUBIC FOOT, STANDARD. (See ANSI 2132.) That quantity of gas that under an absolute pressu
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