What are the categories of Special Purpose Containers?

2025-10-21

In the complex world of global logistics, standard containers are the workhorse of ocean freight. However, when cargo requires additional features, such as specific temperature requirements or unique handling, the industry turns to special purpose containers. As a leading Chinese container manufacturer, Container Family specializes in designing these customized solutions. We are committed to creating high-quality, durable containers that meet the precise and often demanding requirements of a wide range of industries worldwide. Special purpose containers, also known as specialized containers, are specially modified and integrated with equipment for transporting and storing cargo that cannot be accommodated by standard dry cargo containers.

Special Purpose Container

Special Purpose Container Types

The category of special purpose containers is extensive, encompassing a range of custom designs tailored to specific cargo types. Below is a breakdown of some of the most common types.

1. Refrigerated Containers (Reefers)

Reefers are temperature-controlled containers essential for transporting perishable goods. They maintain a constant, specific temperature range, ensuring that food, pharmaceuticals, and other sensitive products remain fresh and edible during transportation. 

2. Tank Containers 

Tanker containers are designed for transporting liquids, gases, and powdered substances and meet stringent safety standards. They are suitable for transporting a wide range of cargo types, including food-grade liquids, chemicals, and hazardous materials.

3. Open Top Containers

These containers feature a removable roof, allowing for top loading of cargo that is too tall for standard containers. They are ideal for heavy machinery, lumber, or any oversized cargo requiring a crane to load.

4. Flatbed Containers

Flatbed containers have foldable ends and no sidewalls, making them ideal for transporting overweight, overwidth, or oddly shaped cargo, such as vehicles, industrial parts, or construction equipment.

Parameter Refrigerated Container (20ft) Tank Container (20ft) Open-Top Container (20ft) Flat-Rack Container (20ft)
External Dimensions 20' L x 8' W x 8'6" H 20' L x 8' W x 8'6" H 20' L x 8' W x 8'6" H 20' L x 8' W (varies)
Internal Dimensions 17'8" L x 7'6" W x 7'6" H N/A (Tank Capacity: ~26, 000 liters) 19'4" L x 7'8" W x 7'10" H Platform: 18'9" L x 8' W
Tare Weight ~3, 200 kg ~3, 700 kg ~2, 250 kg ~2, 750 kg
Payload Capacity ~27, 500 kg ~26, 500 kg ~28, 250 kg ~45, 000 kg
Max Gross Weight 30, 480 kg 34, 000 kg 30, 480 kg 48, 000 kg
Door Opening Standard Reefer Doors Manholes & Discharge Valves Removable Canvas Top No Sides/Doors
Key Feature Temperature Range: -30°C to +30°C Stainless Steel Tank (316L), 1.8 Bar Test Pressure Lifting Capacity of 20+ tons on corner posts Collapsible End Frames

Construction Specifications

Material: High-strength weathering steel (Grade A or higher) for excellent corrosion resistance and structural integrity.

Corner posts and fittings: Certified and tested to ISO standards, ensuring compatibility with a wide range of handling equipment worldwide.

Flooring: 28mm thick engineered hardwood flooring, treated with insect repellent and anti-corrosion chemicals, can withstand heavy loads, including those from forklifts. 

Wall and roof panels: Standard units utilize corrugated steel; aluminum or FRP (fiber-reinforced plastic) are available for specialized applications such as food transport.

Paint system: An automated, multi-layer epoxy coating system ensures uniform coverage and maximizes resistance to the harsh marine environment.


Frequently Asked Questions

1. What is the main advantage of using a Special Purpose Container over a standard one?

The primary advantage is the preservation of cargo integrity and safety. Standard containers are designed for dry, non-perishable goods. Special Purpose Containers are engineered to address specific challenges:

Perishable Goods: Reefers maintain a constant temperature, preventing spoilage.

Hazardous Liquids: Tank containers are built to international safety codes (IMDG, ASME) to prevent leaks and contain pressures.

Oversized Cargo: Open-tops and flat-racks facilitate the loading and transport of items that are physically impossible to fit into a standard box.

Using the correct Special Purpose Container minimizes risk, reduces insurance costs, and ensures compliance with international shipping regulations.


2. Can Special Purpose Containers be customized beyond the standard models?

Absolutely. In fact, deep customization is the core of what we do at Container Family. While standard models cover common needs, many applications require unique solutions. Our engineering team can work with you to develop containers with:

Custom Interior Layouts: Including shelving, hanging systems, or partitioning.

Specialized Coatings: Epoxy, zinc, or other linings for specific chemical compatibilities.

Enhanced Security Features: Such as high-security locking systems, GPS tracking, and alarm systems.

Modified Structural Elements: Such as additional reinforcement points, extra-wide doors, or custom lifting arrangements.

Specialized Equipment Integration: Such as built-in generators, hydraulic ramps, or specific monitoring systems.

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