The CSA B149 Series provides important guidance for the safe handling and storage of natural gas and propane, installation of related appliances and equipment, including vehicle refuelling, and stationary gas engines and turbines, as well as for systems generating and using digester gas, landfill gas, and biogas.

CSA B149.1, Natural gas and propane installation code , is a major component of the natural gas safety system in Canada. As such, it is incorporated by reference into regulations by all provinces and territories. The latest 2025 edition of the code reflects the latest safety requirements and cutting-edge advances in industry technologies.

Latest editions of CSA B149 codes

Gas burners of a heating systems

CSA B149.1:25
Natural gas and propane installation code

Overview of Changes training included*

Natural gas storage tanks

CSA B149.2:25
Propane storage and handling code

Overview of Changes training included*

An installation using natural gas

CSA B149.3:25
Code for field approval of fuel-burning appliances and equipment

Overview of Changes training included*

A gas fitter installing a natural gas heating system

CSA B149.1:25 Code, Handbook & Training Package

Includes CSA B149.1:25, Handbook, and Overview of Changes training*

A gas technician connecting the piping of a natural gas system

CSA B149.1:25, CSA B149.2:25 & Training Package

Includes CSA B149.1:25, CSA B149.2:25, and Overview of Changes training*

*Training is not included with a purchase of subscription products.

CSA B149.1:20

Natural gas and propane installation code

CSA B149.2:20

Propane storage and handling code

CSA B149.3 :20

Code for the field approval of fuel burning appliances and equipment

CSA B149.1:20 & Handbook Bundle

Includes the CSA B149.1:20 & Handbook

A flame of a burner using natural gas

CSA B149:20 Complete Bundle

Includes the CSA B149.1:20 & CSA B149.2:20

Gas burners of a heating systems

CSA B149:20 Complete

Includes the CSA B149.1:20, CSA B149.2:20 & Handbook