Which code outlines the standards for natural gas and propane system installations?

The CSA B149.1 Natural Gas and Propane Installation Code is specifically designed to provide the standards and guidelines for the installation of natural gas and propane systems. This code encompasses various aspects of the installation process, including safe practices, regulatory requirements, and technical specifications necessary for ensuring the safety and reliability of gas systems. It addresses the design, materials, equipment, and installation procedures relevant to both natural gas and propane, ensuring that installations comply with safety standards and minimize risks of hazards associated with gas uses.

The other codes mentioned have different focuses. For instance, the CSA Z662 Pipeline Systems Code is related primarily to pipeline systems and their integrity rather than the installation specifics of natural gas and propane systems. The B149.1 Gas Code is a broader reference but does not specifically identify itself as the installation code for these systems. The National Building Code of Canada governs overall building construction and safety but does not exclusively address the standards for natural gas and propane installations, which is why it would not be the correct choice in this context.