ANSI B109 Family of Standards For Gas Displacement Meters and Service Regulators

The B109 Committee will meet October 8 & 9, 2026, in Louisville, KY, in conjunction with the AGA Operations Fall Committee Meetings. Meeting agenda and registration to be posted by August 2026.

AGA submitted a Project Initiation Notification (PINS) to ANSI for the development of a new standard: BSR B109.7-202x, Electronic Gas Volume Correctors. Directly and materially affected interests wishing to receive more information or to submit comments must contact Luis Escobar by April 13, 2026. Read the announcement in the March 13, 2026 edition of the ANSI Standards Action.

The B109 Committee will meet on Tuesday, September 30, 2025 at the Disney Yacht and Beach Club Resort in Orlando, FL in conjunction with the 2025 AGA Operations Section Fall Committee Meetings. Meeting agenda posted in August 2025. Draft Minutes from the 2025 Fall Meeting available here.

The B109 Committee will meet on Wednesday, September 20, 2023 at the Omni William Penn in Pittsburgh, PA in conjunction with the 2023 AGA Operations Section Fall Committee Meetings. Meeting agenda posted in August 2024. Draft Minutes available here.

The B109 Committee will meet on Wednesday, September 20, 2023 at the Omni William Penn in Pittsburgh, PA in conjunction with the 2023 AGA Operations Section Fall Committee Meetings. Meeting agenda posted in August 2023.

The B109 Committee met on Wednesday, September 14, 2022 at the Disneyland Hotel in Anaheim CA in conjunction with the 2022 AGA Operations Section Fall Committee Meetings. Meeting agenda posted in August 2022.

• Meeting minutes, approved on September 23, 2023

The American National Standards Institute (ANSI) approved the reaffirmation of the existing B109.2 Standard on July 3, 2025. Read the announcement in the July 11, 2025 edition of the ANSI Standards Action newsletter. Reaffirmation is when a standards committee (B109 Committee in this case) reviews an existing standard and determines it is current and doesn’t need immediate revision. The standard was last revised in 2020. This reaffirmed standard became available for purchase on July 23, 2025.

The American National Standards Institute (ANSI) approved the reaffirmation of the existing B109.1 and B109.3 Standards on April 16, 2024. Read the announcement in the April 26, 2024 edition of the ANSI Standards Action newsletter. Reaffirmation is when a standards committee (B109 Committee in this case) reviews an existing standard and determines it is current and doesn’t need immediate revision. Both standards were last updated in 2019. This reaffirmed standard became available for purchase on August 28, 2024.

The American National Standards Institute (ANSI) approved the new B109 Standard for elf-Operated Diaphragm-Type Natural Gas Service Regulators For Nominal Pipe Size up to and including 2 inches (50 mm) and inlet pressures up to 125 psig (861.8 kPa) with outlet pressure of 20 psig (138 kPa) or less not covered in ANSI B109.4 on April 16, 2024. Read the announcement in the April 26, 2024 edition of the ANSI Standards Action newsletter. This new standard became available for purchase on August 1, 2024.

The American National Standards Institute (ANSI) approved the new B109 Standard for Single Path Ultrasonic Gas Meters (Under 1400 Cubic Feet Pet Hour Capacity) on January 9, 2024. Read the announcement in the January 19, 2024 edition of the ANSI Standards Action newsletter. This new standard became available for purchase on January 26, 2024.

ANSI approved the revised B109.4 Standard on October 22, 2021 (announcement on page 28 of the October 19th ANSI Standards Action newsletter). The standard now addresses regulator slam-shuts, including slam-shut test procedures and marking requirements. ANSI B109.4-2021 was added to the AGA publication store on November 24, 2021 and is now available for purchase.

AGA submitted a Project Initiation Notification (PINS) to ANSI for the development of a new standard: BSR B109.6-202x, Single Path Ultrasonic Gas Meters (Under 1400 Cubic Feet Per Hour Capacity). Directly and materially affected interests wishing to receive more information or to submit comments must contact Luis Escobar (lescobar@aga.org) by December 12, 2021. Read the announcement in the November 12, 2021 edition of the ANSI Standards Action. 

AGA submitted a Project Initiation Notification (PINS) to ANSI for the development of a new standard: BSR B109.5-202x, Self-Operated Diaphragm-Type Natural Gas Service Regulators for Nominal Pipe Size Up To 2 Inches (50.8 mm). Directly and materially affected interests wishing to receive more information or to submit comments must contact Luis Escobar (lescobar@aga.org) by June 26, 2020. Read the announcement in the May 29, 2020 edition of the ANSI Standards Action. 

The B109 Committee has decided to reaffirm the B109.2 Standard (Diaphragm-Type Gas Displacement Meters (500 Cubic Feet Per Hour Capacity and Over)) without change from the 2020 edition . Public comments on the reaffirmation of these standards are due to the lescobar@aga.org by May 26, 2025 and must be submitted on this Public Comment Form.

The B109 Committee has decided to reaffirm the B109.1 Standard (Diaphragm-Type Gas Displacement Meters (Under 500 Cubic Feet Per Hour Capacity)) and the B109.3 Standard (Rotary-Type Gas Displacement Meters) without change from the 2019 edition of each standard. Public comments on the reaffirmation of these standards are due to the lescobar@aga.org by April 1, 2024 and must be submitted on this Public Comment Form.

The portion of the draft new proposed B109.5 Standard (Self-Operated Diaphragm-Type Natural Gas Service Regulators for nominal pipe size up to and including 2 inches (50 mm) and inlet pressures up to 125 psig (861.8 kPa) with outlet pressures of 20 psig (138 kPa) or less not covered in ANSI B109.4) is available for review and comment. Public comments are due to lescobar@aga.org by February 25, 2024 and must be submitted on this Public Comment Form.

The Draft of the new proposed B109.5 Standard (Self-Operated Diaphragm-Type Natural Gas Service Regulators for nominal pipe size up to and including 2 inches (50 mm) and inlet pressures up to 125 psig (861.8 kPa) with outlet pressures of 20 psig (138 kPa) or less not covered in ANSI B109.4) is available for review and comment. Public comments are due to lescobar@aga.org by October 2, 2023 and must be submitted on this Public Comment Form.

The Draft of the new proposed B109.6 Standard (Single Path Ultrasonic Gas Meter under 1400 cubic feet per hour capacity) is available for review and comment. Public comments are due to lescobar@aga.org by July 3, 2023 and must be submitted on this Public Comment Form.

AGA has submitted revisions to the scope of the accreditiation on file with ANSI for the B109 committee. The revised scope is as follows: “Accredited Standards Committee B109 is responsible for the development and maintenance of standards for gas meters, gas service regulators and related devices that are used in the revenue measurement of fuel gas. For both new types and newly constructed meters and service regulators, these standards include: definitions, construction criteria, performance criteria, test methods, in-service performance criteria, installation requirements/practices, and equipment.” Please submit any comments or questions by July 11, 2022 to Luis Escobar, lescobar@aga.org.

The Revision Draft of the B109.4 Standard (Self-Operated Diaphragm-Type Natural Gas Service Regulator for nominal pipe size 1-1/4 inches and smaller with outlet pressures of 2 psi and less) is available for review and comment. Public comments are due to  lescobar@aga.org by August 23, 2021 and must be submitted on this Public Comment Form. No public comments were received.

In May 2020, the committee updated our patent policy to bring it into alignment with the latest version of the ANSI Essential Requirements. Read the ANSI B109 Procedures here.