Annex - Revised Measures to Prevent Explosions in Oil Tanker Cargo Pump-Rooms of New and Existing Oil Tankers
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.774 – Revised Measures to Prevent Explosions in Oil Tanker Cargo Pump-Rooms – (Adopted on 12 December 1996) - Annex - Revised Measures to Prevent Explosions in Oil Tanker Cargo Pump-Rooms of New and Existing Oil Tankers

Annex - Revised Measures to Prevent Explosions in Oil Tanker Cargo Pump-Rooms of New and Existing Oil Tankers

  1 Cargo pumps, ballast pumps and stripping pumps, installed in cargo pump-rooms and driven by shafts passing through pump room bulkheads should be fitted with temperature sensing devices for bulkhead shaft glands, bearings and pump casings. Alarm should be initiated in the cargo control room or the pump control station.

  2 Lighting in cargo pump-rooms should be interlocked with ventilation such that ventilation should be in operation when switching on the lighting. Failure of the ventilation system should not cause the lighting to go out. Emergency lighting, if fitted, should not be interlocked.

  3 A system for continuous monitoring of the concentration of hydrocarbon gases should be fitted. Sampling points or detector heads should be located in suitable positions in order that potentially dangerous leakages are readily detected. Suitable positions may be the exhaust ventilation duct and lower parts of the pump-room above floor plates. When the hydrocarbon gas concentration reaches a pre-set level which should not be higher than 10% of the lower flammable limit, a continuous audible and visual alarm signal should be automatically effected in the pump-room, engine control room, cargo control room and navigation bridge to alert personnel to the potential hazard.

  4 All pump-rooms should be provided with bilge level monitoring devices together with appropriately located alarms.

Parent topic: MSC/Circular.774 – Revised Measures to Prevent Explosions in Oil Tanker Cargo Pump-Rooms – (Adopted on 12 December 1996)
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