Description
The double-sling FIBC big bag carries two full-length lifting loops positioned on opposite sides of the bag. A forklift or crane picks up both slings simultaneously, giving a fast and consistent lift without needing to align with four separate corner loops. This makes the double-sling FIBC the preferred choice in filling operations with high throughput, narrow aisles, or fixed-direction forklift approach.
NovoPacks supplies double-sling FIBC bags — also called 2-loop bulk bags, twin-sling FIBCs, or double-loop big bags — direct from the manufacturer to European buyers. Safe working loads range from 500 kg up to 2,000 kg at a 5:1 safety factor, with UN-certified 6:1 versions available for hazardous goods.
When to Choose a Double-Sling Over a Four-Sling FIBC
The choice between double-sling and four-sling FIBCs usually comes down to your handling equipment and site layout. Double-sling bags suit operations where forklifts always approach from a consistent direction, where overhead crane lifting is used, or where filling stations have a fixed spout that bags must align with. The two long slings are also faster to hook onto a crane spreader bar than threading four separate loops.
Four-sling bags offer full 360-degree forklift access, which is why they dominate general warehouse, agricultural, and multi-purpose applications. Double-sling bags tend to be preferred in fertilizer, construction, and chemical processing environments where handling is more regimented and throughput speed matters.
Construction and Specifications
Double-sling FIBCs are manufactured from high-tenacity woven polypropylene. The two lifting slings run the full height of the bag and are integrated into the fabric body during weaving, not attached as a separate stitched component. Standard fabric weight: 100 to 180 GSM. Available in Type A, B, C, and D static classifications.
Top options: open top, duffle or skirt top for dust containment, or fill spout (35 to 50 cm) for pneumatic or gravity nozzle filling. Bottom options: flat bottom, discharge spout with star or bunny-ear closure, or pallet base. PE liners from 60 to 150 microns are available loose-fit or form-fit.
Certifications
Food-grade double-sling FIBC bags compliant with EU Regulation 10/2011 are available for food ingredient applications. UN-certified versions for hazardous goods transport under ADR/RID (Groups II and III) are available at 6:1 safety factor with UN 13H3 markings, tested to ISO 21898 standards.
Frequently Asked Questions
What is a double-sling FIBC big bag?
A double-sling FIBC is a flexible intermediate bulk container with two lifting loops running along opposite sides of the bag body. It is also called a 2-loop big bag, twin-sling FIBC, or double-loop bulk bag. It is commonly used where forklifts approach from a fixed direction or where overhead crane lifting makes two-point pickup more practical than four corner loops.
What is the difference between a single-sling, double-sling, and four-sling FIBC?
The number and position of lifting loops defines each type. A single-sling bag has one central loop for crane or hook lifting. A double-sling bag has two loops on opposite sides for fixed-direction forklift or crane lifting. A four-sling bag has one loop at each corner for forklift access from any direction. Four-sling bags are the most common for general use. Single-sling bags are most common in construction. Double-sling bags are preferred in operations with fixed-direction or crane-based handling.
How much weight does a double-sling FIBC hold?
Our double-sling FIBCs are available from 500 kg up to 2,000 kg safe working load with a 5:1 safety factor as standard. The most commonly ordered capacity is 1,000 kg (one tonne). UN-certified 6:1 safety factor versions are available for hazardous goods transport.
Can a double-sling FIBC be used with a standard forklift?
Yes. A standard forklift with twin tines picks up both slings simultaneously, approaching from either of the two sling sides. The bag cannot be picked up from the two unslung sides, so the filling station layout must be designed for consistent directional pickup. For full 360-degree forklift access, a four-sling FIBC is more appropriate.
Are double-sling FIBCs available food grade?
Yes. Food-grade double-sling FIBCs are manufactured from virgin PP in a controlled environment and comply with EU Regulation 10/2011. They are suitable for bulk food ingredients and can be supplied with HACCP documentation on request.