Container shipping for special cargo - Liquid cargo

Loading of Liquid Cargo in Container Shipping

Liquid cargo in container shipping can be regarded as a type of bulk cargo, transported using specialized tank containers, and is therefore classified as special cargo. Liquid cargo transported in tank containers mainly includes food items such as soy sauce, glucose, and various alcoholic beverages, as well as chemical cargoes such as cresol.

Using tank containers to transport liquid cargo can greatly save packaging and loading/unloading costs, but its development has been relatively slow, mainly because: the manufacturing of tank containers requires high technical standards and is costly; there are certain difficulties in providing places to clean the tank bodies and in wastewater treatment; and food products account for a large proportion of liquid cargo, while food transportation requires strict compliance and has many restrictions. Therefore, apart from a portion of liquid cargo suitable for tank container transport, a large amount of liquid cargo still uses general cargo containers and is tank-filled before loading.

1. Precautions for Tank Container Transportation

• Check whether the structure, performance, and internal coating of the tank container meet the requirements for cargo transportation.
• Understand the characteristics of the cargo, whether heating is required during transportation and loading/unloading, and whether the loading/unloading site is equipped with steam and power sources.
• Verify whether the ratio of container capacity to allowable load weight is close to the cargo density. When the cargo density is high and the tank is loaded half-full, there is a risk of damage to the tank during loading, unloading, and transportation.
• Check whether the necessary equipment is available for emptying the tank and whether the equipment is suitable for the container's valves, etc.
• Check whether the overflow valve is effective, etc.

2. Liquid Cargo Loading Requirements

• Container Selection: Use dedicated containers (IBC totes, steel drums, etc.) with intact seals to prevent leakage.
• Leak Prevention Measures: Use absorbent materials to deal with spills; keep liquid drums upright and secure them with straps.
• Tank Container Cleaning: Before loading, thoroughly clean the interior of the tank container to ensure no foreign objects or residues, avoiding contamination of the cargo.
• Loading Rate Control: The loading volume of liquid cargo must not exceed 95% of the tank container's capacity, leaving expansion space to prevent excessive pressure inside the tank due to liquid expansion when the temperature rises.
• Leak Check: Before loading, inspect the integrity of valves, flanges, and seals; after loading, re-confirm that all sealing points are leak-free.
• Dangerous Goods Declaration: If the liquid cargo is dangerous goods (e.g., flammable liquids Class 3), it must be declared and labeled in accordance with dangerous goods transport regulations.
• Temperature Control: Some liquid cargoes need to be transported at specific temperatures, requiring the use of tank containers with insulation or heating functions.

Liquid cargo transportation has extremely high safety requirements. Container selection and seal inspection are of the utmost importance, and it is recommended to prepare a leak emergency response plan in advance. Cargo owners should choose a logistics service provider with experience in liquid cargo transportation to ensure safety and compliance throughout the entire transport process.

Further reading: Drum loading for handling barreled liquids; Bulk cargo loading compares granular bulk cargo; Refrigerated cargo loading covers temperature-controlled liquid cargo.

Liquid Cargo Loading FAQ

Q: Can liquid cargo be shipped in regular containers?

A: Yes. Large quantities of liquid cargo are still shipped in general-purpose containers. Before loading, the liquid must be containerized in specialized containers (IBC totes, drums, etc.), with containers properly sealed, upright, and secured with straps. For bulk or high-hazard liquid cargo, tank containers are recommended.

Q: What should be noted when loading liquids in tank containers?

A: The filling volume should not exceed 95% of the tank container's capacity to leave room for expansion. Clean the tank thoroughly before loading, and check valves, flanges, and seals. Dangerous goods must be declared and labeled in accordance with IMDG. For temperature-sensitive cargo, use tank containers with insulation or heating functions.

Bofeng Logistics specializes in providing one-stop logistics services including domestic container shipping, international shipping (FCL/LCL), Hong Kong and Macau logistics dedicated lines, as well as trailer, customs declaration, and warehousing. Contact: 130-7567-8958 (Manager Huang), call now for a personalized quote!

Disclaimer: This article was compiled by the Bofeng Logistics team and verified as of August 2026. Cargo loading practices may change with the International Maritime Dangerous Goods Code (IMDG Code), carrier policies and industry standards; always refer to the carrier's current requirements for your container loading.