Which standard is a relief valve requirement for cylinders? (B 149.1)

Which standard is a relief valve requirement for cylinders? (B 149.1)

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

Answer: (C)

Relief valves on cylinders are safety devices that vent gas if pressure inside a cylinder gets too high, preventing dangerous overpressure. In Canadian gas installation practice, the standard that explicitly requires this cylinder relief protection is B149.1, the Natural Gas and Propane Installation Code. This code covers safety devices, piping, and appliance installation, and it specifically includes requirements for relief devices on cylinders used in gas systems. The other standards focus on different aspects—one on LPG handling and storage, and another on propane installation specifics—so they do not carry the same cylinder relief requirement as B149.1.

Relief valves on cylinders are safety devices that vent gas if pressure inside a cylinder gets too high, preventing dangerous overpressure. In Canadian gas installation practice, the standard that explicitly requires this cylinder relief protection is B149.1, the Natural Gas and Propane Installation Code. This code covers safety devices, piping, and appliance installation, and it specifically includes requirements for relief devices on cylinders used in gas systems. The other standards focus on different aspects—one on LPG handling and storage, and another on propane installation specifics—so they do not carry the same cylinder relief requirement as B149.1.