Potential cold weather hazards
As we come upon Vancouver’s coldest months, those parties with cargo fumigation requirements should bear in mind the potential difficulties and delays that can arise from the falling temperatures.
Canadian regulations for cargo fumigation require a minimum temperature of 5 degrees Celsius for the cargo. Temperatures below that mark can limit the ability of the Aluminum Phosphide pellets to react with the ambient moisture and release their Hydrogen Phosphide (PH3 – Phosphine Gas) in the cargo holds. If the cargo temperature falls below that mark, it can prevent adequate gas levels building up in the holds which are needed to confirm there is no possibility of leakage into the superstructure.
This regulation is vital as it directly affects crew’s safety. Each year, approximately 7-10% of ships experience instances of fumigant gas infiltrating areas such as the engine room, accommodations, forecastle (forward storage space), crane towers, or deck stores.
In some cases vessels may need to wait at anchorage for an improvement to the outside temperature before the 24hr fumigation process can begin. Fumigators will monitor the situation closely; including grain temperatures at commencement of loading, during loading and weather forecast information to best coordinate the fumigation process and limit any potential delays due to the cold.
Depending in the ultimate destination and schedule, vessels loading in Prince Rupert could also have the option to sail to Vancouver for fumigation enroute. Generally the temperatures and weather are more favorable for fumigation in Vancouver.