What are offshore tank containers?

Offshore tank containers (or "DNV tanks") are ISO standard tank containers adapted for coastal, inter-island, and nearshore oil and gas/chemical/energy logistics.  They are typically 10ft tank offshore container/20ft tank container in size and designed according to certifications such as DNV 2.7-1/CSC/IMDG. They are resistant to salt spray and swaying, and are used for the safe storage, transportation, and multimodal transport of liquids and gases. They are commonly used in oil and gas Platform resupply, nearshore transportation of chemicals, and short-distance distribution of LNG/liquid ammonia.

Core Features and Design Requirements

Structural Reinforcement: The frame is made of weathering steel + hot-dip galvanized steel, with thickened corner castings for impact resistance and stacking, suitable for offshore lifting and deck securing.
Corrosion Protection and Sealing: The tank body has epoxy + polyurethane coating, 100% non-destructive testing of welds, and IP67 protection for valves/flanges, suitable for salt spray and high humidity environments.
Safety System: Equipped with emergency shut-off valves, overflow protection, pressure/temperature monitoring, and explosion-proof ventilation, complying with IMDG dangerous goods transport requirements.
Multimodal Transport Compatibility: Compatible with container spreaders, roll-on/roll-off systems, and deck securing, allowing for seamless transfer via road, rail, and offshore vessels, enabling "one-tank-to-destination" transport to reduce cargo damage and costs.

Main Types and Applicable Scenarios

Offshore Chemical Tank Containers: 10ft container/20ft container stainless steel tanks, used for acids, alkalis, solvents, food-grade liquids, etc., suitable for inter-plant supply in coastal chemical parks and inter-island chemical distribution.
Offshore LNG/Liquid Ammonia Tank Containers: Vacuum insulated tanks, -162℃ cold insulation, used for small receiving terminals, distributed energy and marine fuel supply, supporting the "tank container + feeder vessel" model.
Oil and Gas Platform Supply Tank Containers: Customized sizes (e.g., 6ft/8ft), used for drilling fluids, crude oil samples, chemical agents, etc., meeting platform lifting and explosion-proof requirements.
Emergency Rescue Tank Containers: Rapid deployment, used for oil spill dispersants, fire-fighting foam liquids, etc., suitable for offshore emergency scenarios.

Selection Recommendations

Prioritize 10ft containers: Ideal for inter-island small-batch shipments, platform resupply, and scenarios with frequent intermodal transport nodes, offering high flexibility.
Prioritize 20ft containers: Ideal for larger volume coastal chemical transportation and short-distance LNG distribution, offering higher cost efficiency.
Special media: For LNG/liquid ammonia, choose vacuum insulated tank containers; for food-grade applications, choose 316L stainless steel; for strong acids and bases, choose special alloy linings.

Our dnv container factory can manufacture tank containers of any model. If you would like to know what materials or models of containers are best suited for your project, please feel free to contact us. We will recommend the best product for your needs.