Shandong Blue Whale Packaging Materials Co., Ltd. is one of the leading professional flexitank and container bags manufacturers and exporters in China
Fish Oil Transportation: Flexitanks & ISO Tank Containers - Your Solution Guide
(CHINA, 3/3/2025)
Sometimes, standard boxes just don't cut it. For liquid goods, the ideal container might be both square and round. This shipper's guide explores flexitanks and ISO tank containers, providing everything you need to know.
What are Flexitanks?
Flexitanks are flexible shipping containers designed for non-hazardous liquid cargo. Think of them as a large "bag-in-box" for bulk liquids. A multi-layered polyethylene bag, reinforced with a woven polypropylene outer layer, is fitted inside a standard 20-foot container. This bag can hold up to 24,000 liters of liquid cargo, which is then securely braced to prevent shifting during transit.

What Liquid Cargo Can I Ship with Flexitanks?
Flexitanks accommodate a wide variety of non-hazardous liquids, including foodstuffs, feed, pharmaceuticals, chemicals, and industrial goods. Common examples include cooking oil, water, wine, beer, biodiesel, base oil, transformer oil, automotive oils, glycerin, emulsions, detergents, and additives.
What are ISO Tank Containers?
ISO tank containers are robust shipping containers designed for both non-hazardous and hazardous liquid cargo. They share the same frame dimensions as standard containers but feature a cylindrical stainless steel tank, insulated and protected by an aluminum or polyurethane layer, ensuring safe transport of diverse liquids.

What Liquid Cargo Can I Ship with ISO Tank Containers?
ISO tank containers are a versatile and proven solution for transporting a wide range of liquids, including pressurized and refrigerated liquid gases. They handle everything from edible fluids and non-hazardous liquids to dangerous materials like toxins, flammables, and explosives.
What are the Benefits of Flexitanks?
- Environmentally Friendly: Flexitanks are 100% recyclable and constructed from food-grade materials complying with FDA, BGA, and EEC directives.
- High Shipping Capacity: With capacities ranging from 12,000 to 24,000 liters, flexitanks can carry 40% more cargo than drums and 15% more than intermediate bulk containers.
- Minimal Cargo Loss: Their lightweight design and easy installation minimize the risk of cargo loss, eliminating the need for forklifts during loading and unloading.
- No Empty Positioning Costs: Readily available at major ports worldwide, flexitanks eliminate costly repositioning from distant locations.
- Reduced Cleaning and Storage Costs: As disposable units, flexitanks eliminate cleaning costs and require no additional storage.
- Customizable Design: Flexitanks can be tailored with features like bottom discharge, foil barriers, insulation, heaters, and auto-air vents for sensitive liquids.

What are the Benefits of ISO Tank Containers?
- Reduced Carbon Footprint: Reusable ISO tank containers have a 50% lower carbon footprint than drummed shipments on long-haul routes.
- Large Volume Capacity: With capacities from 21,000 to 26,000 liters, a 20-foot ISO tank container can carry 70% more liquid than a 20-foot container filled with drums.
- Cargo Damage Reduction: Their robust stainless steel shells protect liquids from contamination, corrosion, and extreme weather.
- Temperature Management: Insulated and protective layers minimize heat impact, while heating or cooling systems can be integrated for temperature-sensitive cargo.
- Easy Handling: Rooftop manholes and bottom valves simplify loading and unloading, minimizing manual effort.
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Information of the company:
Address:
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No. 101, Yali Industrial Park, Zhutai Yali Village, Xianchuang District
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City:
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Zibo
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State/ZIP:
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Shandong (255432)
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Country:
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China
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Phone:
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+86 155-8931-1537
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