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

MSC 85/26/Add.2ANNEX 3Page 290SILICOMANGANESE (low carbon)(with known hazard profile or known to evolve gases)(with silicon content of 25% or more)DESCRIPTIONSilicomanganese is an extremely heavy cargo, silvery metallic material with a grey oxidecoating.CHARACTERISTICSANGLE OF REPOSE BULK DENSITY (kg/m 3 ) STOWAGE FACTOR (m 3 /t)Not applicable approx. 3000 0.18 to 0.26SIZE CLASS GROUPapprox. 10 to 100 mm MHB BHAZARDIn contact with water may evolve hydrogen, a flammable gas that may form explosive mixtureswith air and may, under similar conditions produce phosphine and arsine, which are highly toxicgases.Cargo is liable to reduce oxygen content in a cargo space.This cargo is non-combustible or has a low fire-risk.STOWAGE & SEGREGATIONSegregation as required for class 4.3 materials.“Separated from” foodstuffs and all class 8 liquids.HOLD CLEANLINESSClean and dry as relevant to the hazards of the cargo.WEATHER PRECAUTIONSThis cargo shall be kept as dry as practicable before loading, during loading and during voyage.This cargo shall not be loaded during precipitation. During loading of this cargo all non-workinghatches of the cargo spaces to which this cargo are loaded or to be loaded shall be closed.LOADINGTrim in accordance with the relevant provisions required under sections 4 and 5 of the Code.As the density of the cargo is extremely high, the tanktop may be overstressed unless the cargo isevenly spread across the tanktop to equalize the weight distribution. Due consideration shall bepaid to ensure that tanktop is not overstressed during voyage and during loading by a pile of thecargo.I:\MSC\85\26-Add-2.doc