MSC 85/26/Add.2 ANNEX 3 RESOLUTION MSC.268(85) - US Coast ...

MSC 85/26/Add.2ANNEX 3Page 164Any cargo that has already been loaded into a cargo space and which subsequently is exposed toadditional fresh water or seawater over its natural moisture content and becomes wetted, or inwhich reactions have started and its temperature has exceeded 120 o C, shall be discharged withoutdelay.On completion of loading of a cargo space it shall be immediately closed and sealed. Sufficientinert gas shall then be introduced to achieve an oxygen concentration less than 5% thought thecargo space.The ship shall not sail until the master and a competent person recognized by the nationalAdministration of the port of loading are satisfied:.1 that all loaded cargo spaces are correctly sealed and inerted;.2 that the temperature of the cargo has stabilized at all measuring points and that thetemperature does not exceed 65 o C; and.3 that at the end of the inerting process, the concentration of hydrogen in the freespace of the holds has stabilized and does not exceed 0.2% by volume.VENTILATIONThe cargo spaces carrying this cargo shall remain tightly sealed and the inert conditionmaintained during the voyage.CARRIAGEFor quantitative measurements of hydrogen and oxygen, suitable detectors shall be on boardwhile this cargo is carried. The detectors shall be suitable for use in an oxygen-depletedatmosphere and of a type certified safe for use in explosive atmospheres. The concentrations ofhydrogen and oxygen in the cargo spaces carrying this cargo shall be measured at regularintervals during voyage, and the results of the measurements shall be recorded and kept on boardfor a minimum of two years.The oxygen concentration in the cargo spaces carrying this cargo shall be maintained at lessthan 5% throughout the duration of the voyage by topping up with inert gas.Cargo temperatures shall be taken at regular intervals during the voyage and the results of themeasurements shall be recorded and kept on board for a minimum of two years. If thetemperature in the cargo space exceeds 65°C or the monitored hydrogen concentrationexceeds 1% (> 25% LEL) by volume, appropriate safety precautions shall be taken in accordancewith the procedures provided by the shipper in the event of emergency. If in doubt, expert adviceshall be sought.Bilge wells shall be checked regularly for the presence of water. If water is found, it shall beremoved by pumping or draining the bilge wells. Consideration shall be given to increasing thefrequency of cargo monitoring following periods of bad weather. All measurements shall betaken so as to minimize as far as practicable the loss of inert gas from the cargo spaces.I:\MSC\85\26-Add-2.doc