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Code for biogas generation and utilization
This is the third edition of CSA/ANSI B149.6, Code for biogas generation and utilization. It supersedes the previous editions published in 2020 and 2015 under the title Code for digester gas, landfill gas, and biogas generation and utilization. The major changes to this edition include the following
This Code was prepared by the Technical Committee on Biogas Generation and Utilization, under the jurisdiction of the Strategic Steering Committee on Fuels and Appliances, and has been formally approved by the Technical Committee. This Code has also been formally approved by the Interprovincial/Territorial Gas Advisory Council. This Code has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. This Code has been approved by the American National Standards Institute (ANSI) as an American National Standard
This Code applies to the installation of systems for the production, handling, storage, and utilization of biogas in newly constructed facilities, as well as additions to and upgrading of existing systems.
This Code does not apply to any infrastructure of a landfill upstream of the main inlet valve on the vacuum side of the compressor or blower.
This Code applies to piping systems in which the maximum operating pressures for piping used in biogas systems do not exceed 860 kPag (125 psig) for piping installed outdoors or 450 kPag (65 psig) for piping installed indoors.
This Code applies to the safety aspects of the operation and maintenance for handling, storage, and utilization of biogas systems. Note: This Code does not apply to substrate storage, long-term digestate storage, or pilot scale and research digesters in biogas systems.
This Code applies to existing biogas systems where, in the opinion of the authority having jurisdiction, a hazard or potential hazard exists.
Additional provisions Within the scope of Clauses 1.1.1 to 1.1.5, there might be provisions not covered in this Code, in which case the applicable provisions of the authority having jurisdiction are to apply.
This Code applies to the process gas stream or waste gas stream in relation to flares and incinerators within a biogas facility. For flare pilot systems utilizing propane or natural gas, see
Exclusions Renewable natural gas is excluded from this Code.
In this Code, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Code; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Code. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.
| SDO | CSA: Canadian Standards Association |
| Document Number | |
| Publication Date | Jan. 1, 2025 |
| Language | en - English |
| Page Count | 105 |
| Revision Level | |
| Supercedes | |
| Committee |
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