🔍 Key Concepts

• 46 CFR requirements for fuel oil shutoff or quick-closing valves on fuel tanks • Material restrictions for fuel system components (especially cast iron vs. steel/ductile materials) • Location and method of operating emergency shutoff valves (local vs. remote control)

💭 Think About

• Ask yourself: In an emergency fire situation, where and how should you be able to operate a fuel oil tank shutoff valve? Do you want to stand right next to the hazard? • Think about which materials are generally prohibited for critical fuel system parts that must withstand fire and impact. Is cast iron commonly allowed for fuel shutoff valves? • Consider whether the regulation is focused on how the valve is powered (manual vs. power-operated) or how and from where it can be safely controlled.

✅ Before You Answer

• Check 46 CFR sections on fuel oil systems for wording about quick-closing or remote-operated valves on fuel tanks. • Verify whether cast iron is permitted or prohibited for fuel valves in machinery spaces and fuel tanks. • Confirm if the regulation explicitly requires power operation, or just a specific type/location of manual/remote control.