Coast Guard Regulations (46 CFR) permit the use of drain valves for removing water or impurities from diesel engine fuel systems. These valves must be __________.
• Fuel oil tank safety requirements in 46 CFR (fuel oil service systems and drainage arrangements) • Why penetrating the bottom or sides of a fuel tank is more hazardous than using the top for piping connections • The difference between valve type/design (gate vs self-closing) and location requirements for safety
• Which option would best minimize the risk of an uncontrolled fuel oil discharge if a pipe, valve, or fitting fails? • Look at the wording carefully: is the regulation focusing on how you operate the valve (electrical/manual), what type of valve it is, or where/through what part of the tank the drain is arranged? • Ask yourself which feature is a common Coast Guard design principle for fuel systems: limiting leakage if a line is damaged or a valve is left open.
• Verify in 46 CFR where fuel oil drain and stripping connections are discussed for diesel engine installations. • Check whether gate valves are normally designed to be self-closing, or if that wording sounds technically inconsistent. • Confirm whether Coast Guard rules favor top-mounted versus bottom/side-mounted penetrations for fuel tanks when dealing with drains and similar piping.
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