Flexitank vs ISO Tank: Key Differences and Benefits for Liquid Transport

What is a Flexitank?

Flexitanks are flexible tank containers designed for transporting non-hazardous liquids in bulk. They are:

Collapsible and Hermetically Sealed: Fit inside a standard 20-foot container.
Capacity Range: Generally between 10,000 and 24,000 liters (custom options up to 100,000 liters).
Construction: Multiple layers of polyethylene plus a woven polypropylene outer covering.
Cost-Effective Alternative: Often used to maximize payload while reducing transport costs.

What is an ISO Tank?

ISO tanks are standardized containers for both hazardous and non-hazardous liquids. They are:

Stainless Steel Construction: Ensures durability and contamination resistance.
Cylindrical Shape: Equipped with a manway at the top for loading/unloading.
Long Lifespan: Can be reused for decades with proper maintenance.
Versatile: Suitable for food-grade products and chemicals, making them ideal for large-scale, long-term liquid transport.

Overview of Liquid Transport Solutions

Bulk liquid transport underpins global trade, moving products ranging from food items to chemicals and fuels. Flexitanks and ISO tanks are two prominent choices:

Flexitanks:
Favored for cost-effectiveness and ease of installation.
Ideal for non-hazardous liquids and smaller volumes.
ISO Tanks:
Highly durable, handling both hazardous and non-hazardous cargo.
Reusable, offering long-term reliability and larger volume capacity.

Types of Freight Forwarding Services

Key Differences Between Flexitanks and ISO Tanks
Construction:

Flexitanks: Flexible, single-use polyethylene bags.
ISO Tanks: Rigid, reusable stainless steel containers.
Capacity:

Flexitanks: 16,000–24,000 liters (smaller shipments).
ISO Tanks: Can transport 70% more liquid than flexitanks.
Cargo Type:

Flexitanks: Non-hazardous liquids.
ISO Tanks: Both hazardous and non-hazardous materials

Advantages of Using Flexitanks

Cost Savings: Can reduce transport costs by up to 33%.
Higher Payload: Transport 15% more than IBCs and 40% more than drums.
Minimal Contamination Risk: Typically single-use, ensuring product purity.
Lightweight and Easy to Handle: Simplifies loading/unloading, reducing labor costs.
Eco-Friendly: 100% recyclable materials for lower environmental impact.

Advantages of Using ISO Tanks

Robust Construction: Stainless steel reduces risk of damage and contamination.
Long-Term Reusability: Can last up to 30 years, lowering overall carbon footprint.
Temperature Control: Insulating layers maintain stable internal conditions.
Versatility: Suitable for food-grade products and hazardous chemicals alike.
Regulatory Compliance: Designed to meet international standards for safe transport.