For businesses transporting bulk non-classified non-dangerous goods —especially in the food and chemical industries — choosing the right container is critical. Two common solutions stand out: ISO tank containers and dry box containers fitted with flexibags. Each offers distinct benefits and trade-offs, so understanding their differences can help optimise logistics and reduce risks.

Why Choose ISO Tank Containers?

ISO tanks are stainless steel cylinders enclosed within a standardised shipping frame, specifically designed for bulk liquid transport. They provide several key advantages:

1. Enhanced Safety Features – Equipped with pressure relief valves and heating options, ISO tanks are ideal for hazardous, temperature-sensitive, or high-value liquids.
2. Superior Durability – Made from robust stainless steel, ISO tanks withstand harsh conditions, making them a long-term investment.
3. Simplified Logistics – Their standard dimensions make them easy to handle across various transport modes, including rail, truck, and sea freight.
4. Temperature Regulation – Many ISO tanks include telematics, insulation and heating and/or cooling systems to maintain temperature-sensitive liquids at optimal conditions.
5. Eco-Friendly & Cost-Efficient – Since they are reusable, they generate less waste compared to single-use flexibags, offering long-term environmental savings.
6. Better for Bulk Shipments – With a capacity of up to 26,000 liters within a standardized 20-foot frame, ISO tanks are perfect for large-volume liquid transport.

Why Consider Flexibags? 
Flexibags (or flexitanks) are large, single-use plastic liners installed inside standard dry box containers. They offer an alternative approach to bulk liquid shipping with several distinct advantages:

1. Lower Initial Costs – Compared to ISO tanks, flexibags require a smaller upfront investment and minimal maintenance.
2. Lightweight & Versatile – Their flexible design reduces overall shipping weight, cutting transport expenses.
3. Easier Availability – Since they fit inside standard dry containers, securing a transport unit is often more convenient.
4. Ideal for Non-Hazardous Liquids – Commonly used for food-grade products like wine, edible oils, and juices, flexibags simplify transport without the need for extensive safety measures.
5. Compact Storage – When not in use, flexibags take up minimal space, making them convenient for businesses with limited storage facilities.
6. Quick Installation & Removal – They can be installed in a dry container in a short time, streamlining operations.

Potential Challenges with Flexibags 
While cost-effective, flexibags present certain risks and limitations:

1. Sustainability – ISO Tank Container are much more sustainable. It takes 100 flexibags to do the same number of trips as one ISO Tank Container over its lifetime.
2. Recycling – Flexibags are made with single use plastic. Like with the plastic grocery bags, it is uncertain that they are being recycled and end up in a landfill or even the ocean.
3. Cleaning Required – Despite the fact that flexibags are single used, the container used to ship them in still need to be cleaned after every use. Especially after carrying chemical or petroleum products.
4. Handling Risks – Improper handling, sharp objects, or overfilling can cause punctures or ruptures, leading to spillage and loss. To ensure proper handling staff and drivers need to receive proper and specialised training.
5. Temperature Sensitivity – Unlike ISO tanks, flexibags lack built-in temperature control, making them unsuitable for temperature-sensitive cargo.
6. Limited Chemical Compatibility – Some chemicals may degrade flexibag materials, increasing the risk of leaks or spoilage.

Making the Right Choice for Your Business 
The best option depends on your specific transport needs:

• ISO tanks are the go-to for hazardous, high-value, or temperature-sensitive liquids requiring stringent safety measures. They also support a company’s sustainability statements and environmental goals.
• Flexibags work well for non-hazardous, budget-conscious shipments where quick setup and flexibility are key.
  By evaluating sustainability, safety, costs, and operational efficiency, businesses can determine the optimal solution for their supply chain. The right choice will improve logistics, ensure compliance, and enhance product integrity throughout transit.

For more information visit www.trifleet.com

14 March 2025