Draft Details

Designation:CSA/ANSI B149.6
Contact name:Colin Moorhouse
Review start date:Jan 16, 2024
Review end date:Mar 16, 2024
Contact email:thuy.ton(at)csagroup.org
Draft Scope/Description:

1.1 General

1.1.1 Biogas installation application

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.

1.1.2 Landfill demarcation

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.

1.1.3 Biogas pressure limitations

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.

1.1.4 Biogas operation and maintenance application

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.

1.1.5 Hazard in biogas application

This Code applies to existing biogas systems where, in the opinion of the authority having jurisdiction, a hazard or potential hazard exists.

1.1.6 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.

1.1.7 Biogas flares and incinerators application

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

a) in Canada: CSA B149.3; and

b) in the United States: API STD 537

for the field approval of fuel-burning appliances and equipment.

1.1.8 Exclusions

Renewable natural gas is excluded from this Code.

1.2 Summary

Annex H gives a clause-by-clause summary of this Code.

1.3 Terminology

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.

1.4 Dual dimensions

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.

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