1、 ANSI B109.4 Approved Revised December 2016 Self-Operated Diaphragm-Type Natural Gas Service Regulators For Nominal Pipe Size 1 inches (32 mm) and smaller with outlet pressures of 2 psig (13.8 kPa) and less Secretariat 400 North Capitol Street, NW 4thFloor Washington, DC 20001 U.S.A. Catalog No. XM1
2、602 First Edition1998 Second Edition2016 Copyright 2016, American Gas Association All rights reservedi Table of Contents TABLE OF CONTENTS i DISCLAIMERS AND COPYRIGHT . ii PREFACE iv HISTORY OF DEVELOPMENT OF THE STANDARD v ACCREDITED STANDARDS COMMITTEE B109 . vi 1.0 Scope . 1 2.0 Definitions . 2 3
3、.0 General . 5 4.0 Design Requirements . 6 4.1 Regulator Valve Body . 6 4.2 Diaphragm Casing Assembly 7 4.3 Diaphragm . 8 4.4 Loading Spring 8 4.5 Valve Linkage and Disk 8 4.6 Orifice 9 4.7 Exterior Surface . 9 4.8 Vent . 10 4.9 Markings 11 5.0 Qualification Test for Service Regulator Performance 12
4、 5.1 General . 12 5.2 Test Equipment 13 5.3 Test Procedures 13 APPENDIX A: GUIDELINES FOR PRESENTATION OF REGULATOR PERFORMANCE DATA 24 APPENDIX B: SI/METRIC SYMBOLS 28 APPENDIX C: U.S. (INCH-POUND) SYMBOLS 29 APPENDIX D: REFERENCED STANDARDS 30 FORM FOR PROPOSALS ON ANSI B109.4 . 31 ii AMERICAN GAS
5、 ASSOCIATION (AGA) NOTICE AND DISCLAIMER This document was developed through a voluntary consensus standards development process via the American National Standards Institute (ANSI) essential requirements for due process for American National Standards (Edition January 2014). While the American Gas
6、Association (AGA) administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document, and it does not independently test, evaluate or verify the accuracy or completeness of any information or the soundness of any judgments contained in t
7、his publication. The AGA disclaims liability for any personal injury, property damages or other damages of any nature whatsoever, whether special, indirect, consequential or compensatory, directly or indirectly resulting from this publication, the use of or reliance on this publication. The AGA also
8、 makes no guarantee or warranty as to the accuracy or completeness of any information published herein. In issuing and making this document available, the AGA is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is the AGA undertaking to perform a
9、ny duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. The AGA has no power, nor doe
10、s it undertake, to police or enforce compliance with the contents of this document. Nor does the AGA list, certify, test or inspect products, designs or installations for compliance with this document. Any certification or other statement of compliance with the requirements of this document shall no
11、t be attributable to the AGA and is solely the responsibility of the certifier or maker of the statement. The AGA does not take any position with respect to the validity of any patent rights asserted in connection with any items that are mentioned in or are the subject of this publication, and the A
12、GA disclaims liability for the infringement of any patent resulting from the use of or reliance on it. Users of this publication are expressly advised that determination of the validity of any such patent rights and the risk of infringement of such rights is entirely their own responsibility. Users
13、of this publication should consult applicable federal, state, and local laws and regulations. The AGA does not, through this publication, provide legal advice for any purpose or intend to urge action that is not in compliance with applicable laws and this publication may not be construed as doing so
14、. Changes to this document may become necessary from time to time. If changes are believed appropriate by any person or entity, such suggested changes should be communicated to AGA in writing using the form found at the end of the document titled, Form For Proposals on ANSI B109.4 and sent to: Ameri
15、can Gas Association, ATTN: Secretariat B109, 400 North Capitol Street, NW, Suite 450, Washington, DC 20001, U.S.A. Suggested changes must include: contact information, including name, address and any corporate affiliation; full name of the document; suggested revisions to the text of the document; t
16、he rationale for the suggested revisions; and permission to use the suggested revisions in an amended publication of the document. iii Copyright 2016 American Gas Association, All Rights Reserved. Permission is granted to republish material herein in laws or ordinances as well as regulations, admini
17、strative orders or similar documents issued by public authorities. Those desiring permission for other publication should consult the American Gas Association, ATTN: ANSI B109.4 Secretariat, 400 N. Capitol St., NW, Washington, DC, U.S.A. iv PREFACE This publication presents a basic standard for the
18、safe and reliable operation and the substantial and durable construction of self-operated diaphragm-type natural gas service regulators for nominal pipe size of 1 inches (32 mm) and smaller with outlet pressure of 2 psig (3.48 kPa) and less. This work is the result of years of experience that has be
19、en supplemented by extensive research. The standard is intended to meet the minimum design, material, performance and testing requirements for efficient use of service regulators. It is recognized that during any transition period to the metric system, sizes and dimensions need to be expressed in ei
20、ther the metric system or the inch-pound system or both. In this document, both systems are used with the inch-pound units given preference. In most cases, a soft conversion from existing inch-pound values is shown. Soft conversion implies a change in nomenclature only. In this document, the alterna
21、tive nomenclatures (metric and inch-pound) are shown by using parentheses and can be used interchangeably. 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 designed to allow the construction and perfor
22、mance of service regulators that may exceed the various provisions specified in any respect. In this standards preparation, recognition was intended to be given to the possibility of improvement, through the ingenuity of design or otherwise. As progress takes place, revisions may become necessary. W
23、henever such revisions are believed desirable, recommendations should be forwarded to the Chairman of ANSI B109 Committee, American Gas Association, 400 N. Capitol St., NW, Washington, DC 20001 Users of this document should consult applicable federal, state and local regulations. The AGA does not, b
24、y 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 revised or withdrawn at any time. The procedures of the American National Standard
25、s Institute Inc. (ANSI) require that action is taken to reaffirm, revise or withdraw this standard no later than five years from the date of publication. Whenever any revisions are deemed advisable, recommendations should be forwarded to the American Gas Association. A form is included for that purp
26、ose at the end of this standard. Purchasers of American National Standards may receive current information on all standards by writing to the American National Standards Institute Inc., 11 West 42ndStreet, New York, NY 10036, U.S.A.; by calling (212) 642-4900; by faxing ANSI at (212) 398-0023; or by
27、 visiting ANSIs website at http:/www.ansi.org. To purchase additional copies, visit Techstreets website at http:/ v HISTORY OF DEVELOPMENT OF THE STANDARD FOR SELF-OPERATED DIAPHGRAM-TYPE GAS SERVICE REGULATORS In December 1989 at an ad hoc meeting, representatives of the ANSI Z223.1 and Z21 committ
28、ees, AGA, Gas Appliance Manufacturers Association (GAMA) and several other industry organizations recommended that an ANSI standard for service regulators be developed. It was recognized that a systems approach to pressure control and over-pressure protection was necessary to ensure consistency betw
29、een the ANSI standards that cover the houseline and the utilization equipment. In April 1990, a revision that added service regulators to the scope of ANSI B109 ASC was approved. The AGA Operating Section assembled a service regulator standard development task group with representatives from the AG.
30、A Distribution Measurement Committee, Customer Service and Utilization Committee, Distribution Engineering Committee and the major service regulator manufacturers. A representative from the Committee on Canadian Gas Service Regulator Standard was also included. Throughout the development, considerat
31、ion was given to harmonizing the new standard with the Canadian standard. A first draft was completed in 1993. The draft was revised a number of times and was approved by the AGA Operating Section before it was presented to the ANSI B109 Accredited Standard Committee in January 1996. The ANSI B109 A
32、ccredited Standard Committee requested comments on the proposed service regulator standard in May 1996. During a public meeting on Jan. 30, 1997, the committee addressed the comments and approved the standard for submittal to ANSI for endorsement as an American National Standard. vi ACCREDITED STAND
33、ARDS COMMITTEE B109 CHAIR WINSTON MEYER, CenterPoint Energy REPRESENTING USERS Winston Meyer, CenterPoint Energy Cathy Chang, Southern California Gas Co. Fred Maly, Spire Inc. Philip DiGiglio, National Grid PLC Patrick Donnelly, NiSource Benedict Sherman, Xcel Energy REPRESENTING PRODUCERS John Ande
34、rson, Emerson Electric Co. Bob Bennett, Honeywell International Inc. Jon Fickinger, Itron Inc. John Michalak, Romet Ltd. Ron Strong, General Electric Chris Wykle, Sensus USA Inc. REPRESENTING GENERAL INTEREST Terry Grimley, Southwest Research Institute Scott Merritt, Federal Energy Regulatory Commis
35、sion Ralph Richter, National Institute of Standards ” 5.3.3, “Set Point” 5.3.5, “Lock-Up;” 5.3.8, “Relief Set Point;” and 5.3.9, “Relief Valve Performance Test.” d) If the regulator incorporates an auxiliary device such as an over-pressure cut-off (OPCO) device, repeat the testing with the auxiliary
36、 device at the farthest distance from the centerline of the pipe. 5.3.2 Leakage The leakage shall not exceed the requirements set forth below when the regulator is subjected to a back pressure of 5 psig (34.5kPa) through the regulator outlet with the vent and bod y inlet connection blocked or plugge
37、d for regulators with internal relief valves. For non-internal relief regulators, the vent shall be piped to downstream pressure supply and body inlet connection blocked or plugged. Leaks to the atmosphere may be detected, by water immersion or other acceptable means of measuring stated leakage rate
38、. When using the immersion method, submerge the complete regulator under water at a depth not greater than two inches (5.1 cm) and watch for a continuous stream of bubbles. There shall be no stream of bubbles greater than one bubble per second, regardless of the size of the bubbles. The leakage rate
39、 from the regulator shall not exceed 200 cc/hr. The leak test should last for a minimum of 60 seconds. 5.3.3 Set Point For the purposes of developing a uniform testing procedure and comparison, the set point shall be established with the following parameters: a) Inlet Pressure: 40 psig (276 kPa) or
40、the maximum allowable inlet pressure per the manufacturers specification if less than 40 psig (276 kPa). 15 b) Outlet Pressure Ranges: TABLE IV c) Flow Rate: 39 scf/h (1.1 m3/h) of air to be set by slowly increasing the flow rate from zero for a period of five seconds. During tests to check the set
41、point, the regulator should be stable with no evidence of hunting or chattering. Other pressures and flow rates may be used to demonstrate compliance with this standard for alternative requirements. NOTE: Inlet and outlet conditions other than those specified above will affect the performance of the
42、 regulator and could produce varying results. 5.3.4 Hysteresis The regulator hysteresis shall be checked by the following test: a) Mount the regulator in a vertical pipe mount with the diaphragm oriented vertically. Set regulator as described in Section 5.3.3, “Set Point.” b) Close the downstream va
43、lve with a consistent closing speed over a period of five seconds, keep the valve closed for five seconds, and then reopen the valve over a period of five seconds to a flow of 39 scf/h (1.1 m3/h) o f a i r f o r a period of five seconds. c) Record the outlet pressure while at 39 scf/h (1.1 m3/h). Re
44、peat this step three times. d) Open the downstream valve with a consistent opening speed over a period of five seconds to a flow of 200 scf/h (5.67 m3/h) of air. Keep the valve in this position for five seconds, and then close the valve over a period of five seconds to a flow rate of 39 scf/h (1.1 m
45、3/h) of air for a period of five seconds. e) Record the outlet pressure while at 39 scf/h (1.1 m3/h). Repeat this step three times. Outlet Pressure Range Set Point Tolerance X 14 inches w.c. gauge (3.48 kPa gauge) +/- 0.1 inches w.c. gauge (0.025 kPa gauge) 14 inches w.c. gauge (3.48 kPa gauge) X 1
46、psig (6.89 kPa gauge) +/- 0.2 inches w.c.gauge (0.050 kPa gauge) 1 psig (6.89 kPa gauge) X 2 psig (13.8 kPa gauge) +/- 0.03 psig (0.2 kPa gauge) 16 f) The recorded readings shall be within 0.5 inch w.c. (0.124 kPa) of the established set point. 5.3.5 Lock-Up When the demand for flow from the regulat
47、or is shut off, the flow of gas should be stopped against the maximum inlet pressure recommended by the manufacturer for the applicable orifice. The outlet pressure under no-flow conditions, or “lock-up pressure,” shall be checked using the following test method: a) Set the regulator as described in
48、 section 5.3.3. b) Close the outlet valve at a constant speed over five seconds. Allow outlet pressure to stabilize and record lock-up pressure. Wait an additional 30 seconds and ensure the reads are comparable within the measurement system accuracy. c) Ensure that the lock-up pressure is no greater
49、 than 3 inches w.c. (0.75 kPa) above the original set pressure for set points of 14 inches w.c. or less (3.48 kPa). For set points greater than 14 inches w.c. (3.48 kPa), lock-up pressure shall be not be greater than 115% of set point. See Section 5.3.3. 5.3.6 Inlet Pressure Sensitivity With the regulator set point adjusted as per 5.3.3, “Set Point,” the outlet pressure shall be recorded for varying inlet pressure conditions from a minimum of 5 psig (34.5 kPa) to a maximum of 125 psig (861.8 kPa) or to the maximum inlet pressure, li
