Aluminium Silicon Powder, Uncoated UN 1398
ALUMINIUM SILICON POWDER, UNCOATED UN 1398
Schedule source MSC.539(107), Annex 9, Appendix 1, IMSBC Code Amendment 07-23 · pages 71, 72
Description
Powder
Hazard
In contact with water may evolve hydrogen, a flammable gas which may form explosive mixtures with air. Impurities may, under similar circumstances, produce phosphine and arsine, which are highly toxic gases. May also evolve silanes, which are toxic and may ignite spontaneously. This cargo is non-combustible or has a low fire risk.
Stowage and Segregation
“Separated from” foodstuffs and all class 8 liquids.
Hold Cleanliness
Clean and dry as relevant to the hazards of the cargo.
Weather Precautions
This cargo shall be kept as dry as practicable before loading, during loading and during the voyage. This cargo shall not be loaded during precipitation. During loading of this cargo, all non-working hatches of the cargo spaces to which this cargo is loaded, or to be loaded, shall be closed.
Loading
Trim in accordance with the relevant provisions required under sections 4 and 5 of IMSBC Code.
Precautions
Prior to loading this cargo, a certificate shall be provided by the manufacturer or shipper stating that the material was stored under cover, but exposed to the weather in the particle size to be shipped, for not less than 3 days prior to shipment. The bulkheads between the cargo spaces and the engine- room shall be gastight and shall be inspected and approved by the Administration. During handling of this cargo, “NO SMOKING” signs shall be posted on decks and in areas adjacent to cargo spaces and no naked lights shall be permitted in these areas. This cargo shall be loaded in cargo spaces fitted with mechanical ventilation having at least two separate fans. The total ventilation shall be at least six air changes per hour, based on the empty space. At least two sets of self-contained breathing apparatus, in addition to those required by SOLAS regulation II-2/10.10, shall be provided on board.
Ventilation
Continuous mechanical ventilation shall be conducted during the voyage for the cargo spaces carrying this cargo. If maintaining ventilation endangers the ship or the cargo, it may be interrupted unless there is a risk of explosion or other danger due to interruption of the ventilation. In any case, mechanical ventilation shall be maintained for a reasonable period prior to discharge. Ventilation shall be arranged such that any escaping gases are minimized from reaching living quarters on or under the deck.
Carriage
For quantitative measurements of hydrogen, phosphine, arsine, suitable detectors for each gas or combination of gases shall be on board while this cargo is carried. The detectors shall be of certified safe type for use in explosive atmosphere. The concentrations of these gases in the cargo spaces carrying this cargo shall be measured regularly, during the voyage, and the results of the measurements shall be recorded and kept on board.
Discharge
No special requirements.
Clean-up
After discharge of this cargo, the cargo spaces shall be swept clean twice. Water shall not be used for cleaning of the cargo space which has contained this cargo, because of danger of gas.
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