Rapeseed (Canola)

Description

Rapeseed, marketed as canola in its low-erucic varieties, is a leading oilseed crushed for vegetable oil and meal. The small, free-flowing seeds carry under grain stability rules at around 1.40 m3/t, making it a measurement cargo. As an oilseed its behaviour is dominated by moisture and the heating tendency that the oil content brings.

Stowage & loading

Clean, dry, odour-free holds and a grain stability assessment are the starting point. The small seeds are very free-flowing – more so than cereals – so the free surface and any leakage through imperfect closures are watched, and moisture is the key acceptance question given the heating risk the oil content carries.

Hazards & handling

The oil content makes rapeseed prone to self-heating, mould and caking if shipped or kept too moist, with loss of quality and, in the worst case, fire risk. It respires and depletes oxygen, so enclosed spaces are entered under precaution, and it taints and is tainted. The dust raised during handling carries the usual explosibility concern.

Carriage & discharge

Ventilation is worked on a dew-point basis against sweat, and cargo temperatures are monitored where moisture is a concern, since heating is the principal voyage risk. Fumigation is common, with residues cleared and spaces certified before entry. Discharge is by grab or suction, the small seeds running freely.

Key hazards

• Self-heating, mould and caking from the oil content if loaded or kept too moist
• Oxygen depletion in enclosed spaces, with possible fumigant residues
• Very free-flowing seeds that exploit any gap, plus taint sensitivity

Loading precautions

• Present clean, dry, odour-free holds and apply the grain stability assessment
• Treat moisture as the key acceptance criterion given the heating tendency
• Confirm closures against leakage and control transfer dust