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

MSC 85/26/Add.2ANNEX 3Page 257PYRITES, CALCINED (Calcined Pyrites)DESCRIPTIONDust to fines, Calcined Pyrites is the residual product from the chemical industry where all typesof metal sulphides are either used for the production of sulphuric acid or are processed to recoverthe elemental metals – copper, lead, zinc, etc. The acidity of the residue can be considerable, inparticular, in the presence of water or moist air, where pH values between 1.3 and 2.1 arefrequently noted.CHARACTERISTICSANGLE OF REPOSE BULK DENSITY (kg/m 3 ) STOWAGE FACTOR (m 3 /t)Not applicable 2326 0.43SIZE CLASS GROUPNot applicable MHB A and BHAZARDHighly corrosive to steel when wet. Inhalation of dust is irritating and harmful. Cargo mayliquefy.This cargo is non-combustible or has a low fire-risk.STOWAGE & SEGREGATION“Separated from” foodstuffs.HOLD CLEANLINESSDue consideration shall be paid to cleaning and drying of the cargo spaces.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.PRECAUTIONSBilge wells shall be clean, dry and covered as appropriate, to prevent ingress of the cargo.Ceiling boards shall be removed or sealed to prevent penetration by this cargo. The tanktop onwhich this cargo is to be loaded shall be covered with lime before loading.Appropriate precautions shall be taken to protect machinery and accommodation spaces from thedust of the cargo. Bilge wells of the cargo spaces shall be protected from ingress of the cargo.Due consideration shall be paid to protect equipment from the dust of the cargo. Persons whoI:\MSC\85\26-Add-2.doc