WIXLIB

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated to otherindividuals without prior permission from AGA.ANSI B109.4American National StandardApproved: April 23, 1998(Reaffirmed April, 2008)SELF-OPERATED DIAPHRAGM-TYPENATURAL GAS SERVICE REGULATORSFor Nominal Pipe Size 1¼ inches (32 mm) and smaller with outletpressures of 14 inches water column (3.48kPA) and less.SecretariatOperating Section1515 Wilson BoulevardArlington, VA 22209U.S.A.Catalog No. XQ9802August 1998

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSI B109 Committee help revise thisstandard. The contents of this report shall not be copied or disseminated to other individuals without prior permission from AGA.

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated to otherindividuals without prior permission from AGA.DISCLAIMERS AND COPYRIGHTNothing contained in this ANSI standard is to be construed as granting any right, by implication orotherwise, for the manufacture, sale or use in connection with any method, apparatus or product coveredby letters patent, or as 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 ensure the accuracyand reliability of the data contained in this publication; however, ANSI and A.G.A. make norepresentation, warranty or guarantee in connection with this standard and hereby expressly disclaimany liability or responsibility for loss or damage resulting from its use; for any violation of any federal,state or municipal regulation with which this standard may conflict; or for the infringement of any patentfrom the use of this standard. Nothing contained in this standard should be viewed as an endorsement byANSI/A.G.A. of any particular manufacturer’s products.Permission is granted to republish material herein in laws or ordinances, and in regulations,administrative orders, or similar documents issued by public authorities. Those desiring permission forother publication should consult the American Gas Association, 1515 Wilson Boulevard, Arlington, VA22209, U.S.A.Copyright 1998 American Gas Association, All Rights Reservedi

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated to otherindividuals without prior permission from AGA.PREFACEThis publication presents a basic standard for the safe and reliable operation, and the substantial and durableconstruction of self-operated diaphragm-type natural gas service regulators, for nominal pipe size of 1¼inches (32 mm) and smaller with outlet pressure of 1 4 i n c h e s w a t e r c o l u m n ( 3 . 4 8 k P a ) andless. This work is the result of y e a r s of experience, supplemented by extensive research. The standardis intended to meet the minimum design, material, performance and testing requirements for efficient useof service regulators.It is recognized that during any transition period to the metric system, sizes and dimensions need to beexpressed in either the metric system or the inch-pound system or in both. In this document, both systemsare used, with the inch-pound units given preference. In most cases, a soft conversion from existing inchpound values is shown. Soft conversion implies a change in nomenclature only; in this document, thealternative nomenclatures (metric and inch-pound) are shown by using parentheses and can be usedinterchangeably.Nothing in this standard is to be considered as in any way indicating a measure of quality beyondcompliance with the provisions it contains. It is designed to allow the construction and performance ofservice regulators that may exceed the various provisions specified in any respect. In this standard’spreparation, recognition was intended to be given to the possibility of improvement, through ingenuity ofdesign or otherwise. As progress takes place, revisions may become necessary. Whenever such revisionsare believed desirable, recommendations should be forwarded to the Chairman of ANSI B109 Committee,American Gas Association, 1515 Wilson Boulevard, Arlington, VA 22209, U.S.A.Users of this document should consult applicable federal, state and local regulations. The American GasAssociation (A.G.A.) does not, by the publication of this document, intend to present specifications thatare 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 ofthe American National Standards Institute, Inc., (ANSI) require that action be taken to reaffirm, revise orwithdraw this standard no later than five years from the date of publication. Whenever any revisions aredeemed advisable, recommendations should be forwarded to the American Gas Association. A form isincluded for that purpose at the end of this standard. Purchasers of American National Standards mayreceive current information on all standards by writing to the American National Standards Institute,Inc., 11 West 42nd Street, New York, NY 10036, U.S.A.; by calling (212) 642-4900; by faxing ANSI at(212) 398-0023; or by visiting ANSI’s World Wide Web site at http://www.ansi.org. To purchaseadditional copies, contact: A.G.A. Distribution Center, P.O. Box 79230, Baltimore, MD 21279-0230;Fax: (301) 206-9789; Phone: (301) 617-7819.ii

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated to otherindividuals without prior permission from AGA.HISTORY OF DEVELOPMENT OF THE STANDARDFOR SELF-OPERATED DIAPHGRAM-TYPE GAS SERVICE REGULATORSIn December 1989 at an ad hoc meeting, representatives of the ANSI Z223.1 and Z21 committees,A.G.A., Gas Appliance Manufacturers Association (GAMA) and several other industry organizationsrecommended that an ANSI standard for service regulators be developed. It was recognized that a systemsapproach to pressure control and over-pressure protection was necessary to ensure consistency betweenthe ANSI standards that cover the houseline and the utilization equipment. In April 1990, a revision thatadded service regulators to the scope of ANSI B109 ASC was approved.The A.G.A. Operating Section assembled a service regulator standard development task group withrepresentatives from the A.G.A. Distribution Measurement Committee, Customer Service and UtilizationCommittee, and Distribution Engineering Committee, and the major service regulator manufacturers. Arepresentative from the committee on Canadian Gas Service Regulator Standard was also included.Throughout the development, consideration was given to harmonizing the new standard with theCanadian standard. A first draft was completed in 1993. The draft was revised a number of times and wasapproved by the A.G.A. Operating Section before it was presented to the ANSI B109 Committee inJanuary 1996.The ANSI B109 Accredited Standard Committee requested comments on the proposed service regulatorstandard in May 1996. During a public meeting on January 30, 1997, the committee addressed thecomments and approved the standard for submittal to ANSI for endorsement as an American NationalStandard.iii

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated toother individuals without prior permission from AGA.ACKNOWLEDGEMENTSThe task group members of the Operating Section of A.G.A. who contributedto the development of this standard and deserve special thanks are:Task Group ChairmanWinston C. Meyer, ENTEX, Houston, TXAdministrative SecretaryLarry T. Ingels, American Gas Association, Arlington, VAMEMBERS FROM AMERICAN GAS ASSOCIATIONDISTRIBUTION MEASUREMENT COMMITTEEJohn F. Hunt, New York State Electric & Gas, Geneva, NYPhilip J. McKibbin, San Diego Gas & Electric Company, San Diego, CAJoe Ranney, Southern California Gas Company, Los Angeles, CA ChrisM. Spriggs, Oklahoma Natural Gas Company, Tulsa, OKMEMBERS FROM AMERICAN GAS ASSOCIATIONCUSTOMER SERVICE & UTILIZATION COMMITTEEJack D. Rea, Oklahoma Natural Gas Company, Tulsa, OKRichard R. Lonn, Atlanta Gas Light Company, Atlanta, GAMEMBERS FROM AMERICAN GAS ASSOCIATIONDISTRIBUTION ENGINEERING COMMITTEEPeter R. Collette, Public Service Electric & Gas Co., Newark, NJ JamesN. Haynes, Southern California Gas Company, Los Angeles, CAREPRESENTATIVE FROM THE COMMITTEE ONCANADIAN GAS SERVICE REGULATOR STANDARDSAlan Pressick, Consumers Gas, Scarborough, Ontarioiv

This ANSI B109 standard is the property of AGA and is being offered for use only by the members of the ANSIB109 Committee help revise this standard. The contents of this report shall not be copied or disseminated toother individuals without prior permission from AGA.MANUFACTURERS REPRESENTATIVESPaul Adams, Fisher Controls Company, Marshalltown,Don Jones, Schlumberger Industries, Owenton, KYRay Kim, National Meter Parts Company, Lancaster, OH JerryKamalieh, American Meter Company, Nebraska City, NEDennis R. Montag, Equimeter, Inc., DuBois, PASERVICE REGULATOR STANDARD - TASK GROUP COMMITTEE MEMBERSLIAISONSAMERICAN GAS ASSOCIATIONMANAGEMENT COMMITTEELee M. Stewart, Southern California Gas Company, Los Angeles, CAAnthony Mirabella, Connecticut Natural Gas Corporation, Hartford, CTANSI B109 MEMBERSGregory S. Veraa, Washington Gas, Springfield, VADavid F. Kee, Consultant, Glenside, PAANSI Z21 ACCREDITED STANDARDS COMMITTEEAllen J. Callahan, International Approval Services, Cleveland, OHINTERNATIONAL APPROVAL SERVICESB. W. "Bob" Crawford, Cleveland, Ohiov