Which standard specifies relief valve requirements for cylinders?

Which standard specifies relief valve requirements for cylinders?

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

Answer: (A)

Relief devices on gas cylinders are defined by the standard that governs gas cylinders and their safety features. In Canada, the reference used in Ontario and similarly regulated areas is CAN/TSSA-B340. This standard specifies the design, testing, marking, and safety requirements for cylinders and their relief valves, ensuring the device will vent appropriately to prevent overpressure under heat or other adverse conditions. The other options focus on installation requirements for appliances and piping (natural gas and propane), not on the cylinder itself or its relief protection. Therefore, the standard that directly addresses relief valve requirements for cylinders is CAN/TSSA-B340.

Relief devices on gas cylinders are defined by the standard that governs gas cylinders and their safety features. In Canada, the reference used in Ontario and similarly regulated areas is CAN/TSSA-B340. This standard specifies the design, testing, marking, and safety requirements for cylinders and their relief valves, ensuring the device will vent appropriately to prevent overpressure under heat or other adverse conditions.

The other options focus on installation requirements for appliances and piping (natural gas and propane), not on the cylinder itself or its relief protection. Therefore, the standard that directly addresses relief valve requirements for cylinders is CAN/TSSA-B340.