1. Dangerous Goods (DG) by Sea
Dangerous goods (DG) refer to cargo that may cause harm to people, property, or the environment during transportation. The maritime transport of dangerous goods must strictly comply with the IMDG Code (International Maritime Dangerous Goods Code).
9 Classes of Dangerous Goods
| Class | Category | Examples |
|---|---|---|
| Class 1 | Explosives | Fireworks, ammunition |
| Class 2 | Gases | Lighters, compressed gases |
| Class 3 | Flammable Liquids | Paint, solvents, alcohol |
| Class 4 | Flammable Solids | Sulfur, matches, activated carbon |
| Class 5 | Oxidizing Substances | Hydrogen peroxide, bleach |
| Class 6 | Toxic Substances | Pesticides, chemical intermediates |
| Class 7 | Radioactive Material | Medical radiation sources |
| Class 8 | Corrosives | Sulfuric acid, sodium hydroxide |
| Class 9 | Miscellaneous Dangerous Goods | Lithium batteries, magnets, life-saving equipment |
Required Documents for DG Shipment by Sea
| Document | Purpose |
|---|---|
| MSDS (Material Safety Data Sheet) | Certifies cargo composition and hazards |
| Dangerous Goods Packaging Certificate | Proves packaging passed UN tests |
| Dangerous Goods Declaration | Submitted to shipping line and customs |
| IMDG Class Label | DG label affixed to container |
DG Shipping Process by Sea
Provide MSDS → Shipping line review → Prepare DG packaging cert → DG declaration → Apply labels → Load at designated terminal
Not all shipping lines accept dangerous goods; confirmation is required before booking.
2. Out-of-Gauge (OOG) Cargo
Cargo exceeding standard container internal dimensions is called OOG cargo, requiring an Open Top or Flat Rack container.
| Cargo Type | Recommended Container Type |
|---|---|
| Large machinery/equipment | Open top or flat rack |
| Mobile machinery/vehicles | Flat rack |
| Steel structures/pipes (>12m) | Platform/flat rack or breakbulk vessel |
OOG costs are 50%-150% higher than standard containers, including freight surcharges, special container usage fees, terminal oversize handling fees, and lashing/securing costs.
3. Refrigerated Cargo (Reefer)
Applicable Cargo
Frozen food, seafood, meat, fruit, pharmaceuticals, flowers, and other temperature-sensitive goods.
Recommended Temperatures
| Cargo Type | Recommended Temperature | Ventilation Requirement |
|---|---|---|
| Frozen meat | -18°C | Low |
| Seafood | -18°C to -25°C | Low |
| Fresh fruit | 2°C to 8°C | Medium |
| Pharmaceuticals (2-8°C) | 2°C to 8°C | Low |
Reefer Operation Key Points
1. PTI (Pre-Trip Inspection): Must be done before loading to ensure cooling function is normal
2. Pre-cooling: Cargo must be pre-cooled to transport temperature before loading
3. Airflow channels: Leave airflow channels around cargo; do not block reefer unit air outlets
4. Temperature recorder: Use a third-party temperature data logger recommended
5. Continuous power supply: Dedicated reefer plugs available at terminals
Have cargo to ship? Send the product name/weight/volume/destination port to Bofeng Logistics, and we will provide an ALL-IN inclusive quotation with no hidden fees. 20 years of international shipping experience.
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Get a Quote: 13075678958 | info@zhbfwl.com
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