201159 Quick-closing valves (QCVs)

Official report edited from USCG Safety Alert 01-11

QCVs are positive shutoff valves that are designed to isolate oil tanks in the event of a fire and also prevent fuelling of a fire in circumstances where system piping and components are compromised. These valves are designed to be remotely operated, and are also capable of being operated and reset locally. Inoperable QCVs can put the vessel and its crew at greater risk in the event of a fire and it is absolutely critical that they operate correctly, are properly maintained, and ready for use at all times. Adequate knowledge, training, instructions and stocks of replacement spares and must be provided to ship’s staff to ensure the reliability of the remote operating arrangements. Intentionally blocking or disabling these valves (as shown in the following photographs) is unacceptable under any circumstance.