🔍 Key Concepts

• Fixed CO₂ fire-extinguishing systems requirements for Offshore Drilling Units (ODUs) • Title 46 CFR fire protection standards, especially CO₂ system pressure and strength requirements • Difference between working pressure and required bursting (test) pressure for cylinders and piping

💭 Think About

• Think about why regulators require the bursting pressure to be several times higher than the normal working pressure of a CO₂ system. Roughly how many times higher would be reasonable for safety? • Consider that CO₂ at normal ambient temperatures is well below 2,000 psi. Which of the options would give a strong safety margin above that? • Look at how the answer choices are spaced. Which pressures seem more typical of high‑pressure cylinder test standards rather than normal operating conditions?

✅ Before You Answer

• Verify in 46 CFR for the specific section on CO₂ systems for offshore drilling units (ODUs) and note the exact minimum bursting pressure stated there. • Check the typical service (working) pressure of CO₂ cylinders and compare it to each choice to see which one clearly represents a higher test/bursting requirement. • Make sure you are not confusing relief valve setting or normal cylinder charging pressure with the required bursting (test) pressure of the system.