Which standard is another relief valve requirement for cylinders?

Which standard is another relief valve requirement for cylinders?

• A. CAN/TSSA-B340
• B. CAN/CSA-B340
• C. B 149.1
• D. B 149.2

Answer: (D)

Relief devices on cylinders are a safety feature to prevent overpressure when heat or other conditions cause gas pressure to rise. The Propane Installation Code explicitly covers propane systems and includes requirements for relief valves on cylinders, how they must be installed, vented, and protected. Because it provides direct, cylinder-specific relief valve provisions, it’s the best standard to reference for this requirement. The Natural Gas and Propane Installation Code is broader and focuses on general piping and appliance safety, not the cylinder-relief specifics, while the CAN/CSA-B340 standard deals mainly with storage and handling of cylinders rather than the installation-related relief valve requirements.

Relief devices on cylinders are a safety feature to prevent overpressure when heat or other conditions cause gas pressure to rise. The Propane Installation Code explicitly covers propane systems and includes requirements for relief valves on cylinders, how they must be installed, vented, and protected. Because it provides direct, cylinder-specific relief valve provisions, it’s the best standard to reference for this requirement. The Natural Gas and Propane Installation Code is broader and focuses on general piping and appliance safety, not the cylinder-relief specifics, while the CAN/CSA-B340 standard deals mainly with storage and handling of cylinders rather than the installation-related relief valve requirements.