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Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.672 – Measures To Prevent Explosions In Oil Tanker Pump Rooms – (Adopted on 22 December 1994) - Annex - Measures To Prevent Explosions In Cargo Pump Rooms On 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 room should be interlocked with ventilation such that ventilation should be in operation to energize the lighting. Emergency lighting, if fitted, should not be interlocked.

  3 A system for continuously monitoring 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. This system should raise alarms as indicated under the following conditions:

  • .1 when hydrocarbon gas concentrations exceed 1% of the lower flammable limit (LFL), an automatic intermittent audible and visual alarm signal should be effected in the pump room, and entry space thereto, to alert personnel that the atmosphere in the space is not safe to be in without respiratory protection. This alarm should be also be sounded in the cargo control room; and

  • .2 when hydrocarbon gas concentrations exceed 30% of the lower flammable limit (LFL), an automatic continuous audible and visual alarm signal should be effected in the pump room, engine room, cargo control room, and navigation bridge to alert personnel as to the potential hazard of explosion.

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

Parent topic: Annex - Measures To Prevent Explosions In Cargo Pump Rooms On New And Existing Oil Tankers
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