🔍 Key Concepts

• Fixed CO2 fire-extinguishing systems and how the cylinders are arranged and protected • Requirements for storage spaces that contain CO2 cylinders themselves (not the spaces they protect) • Differences between limits on CO2 quantity, requirements for alarms, and automatic vs. manual actuation

💭 Think About

• Ask yourself: Are there specific regulations that cap the maximum CO2 weight in each cylinder, or is the focus more on total system design and safety features? • Consider whether the storage space for the cylinders must warn personnel before CO2 discharge with an alarm, or whether alarms are required only in the protected space where people may be present. • Think about whether CO2 cylinders for fixed systems are normally manually released (with safeguards), or required to be automatically triggered by heat in their own storage space.

✅ Before You Answer

• Check in 46 CFR Subchapter I (inspection and regulation of vessels) fire protection sections for what is actually required of CO2 cylinder rooms. • Verify whether regulations specifically mention an audible alarm in the cylinder storage space versus in the CO2-protected space. • Confirm if there is any rule that the cylinders themselves must be automatically operated by heat, or if standard practice is a different type of actuation.