Big Bag Types: Standard, Q-Bag, Conductive and UN Certified FIBC Comparison
Comparison of standard big bags, Q-Bags, conductive Type C, UN certified and ventilated FIBC types. Which big bag type suits your needs?
Overview of Big Bag Types
An FIBC (big bag) should be selected according to the properties of the product to be carried.
Storage conditions and regulatory requirements also influence the choice.
This guide compares the main big bag types.
1. Standard Big Bag
The most widely used FIBC type. It is made of woven polypropylene fabric and is preferred for general-purpose bulk material transport.
Technical Specifications
| Property | Value |
|---|---|
| Capacity | 500 - 2000 kg |
| Safety Factor | 5:1 or 6:1 |
| Fabric Weight | 140 - 240 g/m² |
| Loops | 4 corner loops |
Advantages
- The most economical option
- Wide range of applications
- Dimensions and fittings made to order
Disadvantages
- Bulges into a round shape when filled; stacking and container loading are less efficient than with a Q-Bag
- Type C is required for explosive atmospheres
- A UN certified model is required for dangerous goods
Suitable Products
Flour, sugar, grain, plastic granules, mineral powders
2. Q-Bag (Baffled Big Bag)
Thanks to its internal baffles it keeps its square shape when filled, which makes stacking and the use of warehouse space more efficient.
Technical Specifications
| Property | Value |
|---|---|
| Shape | Keeps its square shape when filled |
| Stacking | The permitted number of stacked bags is stated on the big bag’s label |
| Space Saving | 20-30% |
Advantages
- Stable stacking
- Efficient use of warehouse space (20-30% saving)
- Efficient container loading
- Neat appearance
Disadvantages
- Higher unit cost than a standard big bag
Suitable Uses
Facilities with limited warehouse space, export shipments, products that need to keep their shape
3. Conductive Big Bag (Type C)
An FIBC designed for safe use in explosive atmospheres.
How It Works
In Type C big bags, conductive threads are woven into the fabric. These threads are interconnected and carry the electrostatic charge to the grounding point.
The bag must always be grounded during use.
Technical Specifications
| Property | Value |
|---|---|
| Construction | Woven fabric with conductive threads |
| Test standard | IEC 61340-4-4 |
| Use | Only when grounded |
Rules for Use
Critical: A Type C big bag used without grounding creates an explosion risk.
- The ground connection must be checked before filling and discharging
- The connection must not be interrupted during filling and discharging
Suitable Environments
- Chemical powder processing plants
- Pharmaceutical production lines
- Metal powder operations
- Powder coating plants
4. UN Certified Big Bag
A UN approved FIBC for the transport of dangerous goods.
UN Codes
Big bags made of woven plastic are classified under four UN codes:
| UN Code | Description |
|---|---|
| 13H1 | Woven plastic, without coating or liner |
| 13H2 | Woven plastic, coated |
| 13H3 | Woven plastic, with liner |
| 13H4 | Woven plastic, coated and with liner |
Test Requirements
For UN certification, big bags pass the following tests:
- Drop Test: PG I: 1.8 m · PG II: 1.2 m · PG III: 0.8 m
- Stacking Test: Held under load for 24 hours
- Top Lift Test: Lifted with a load of 6 times the maximum net mass
- Tear Test: Tear resistance
- Topple and Righting Tests
Regulatory Compliance
- ADR (road)
- RID (rail)
- IMDG (sea)
Read more: UN Certified Big Bags: Dangerous Goods Transport
5. Ventilated Big Bag
Made from fabric with ventilation strips over its whole surface, for products that need to breathe.
Design Features
- Fabric with ventilation strips over the whole surface
- Air circulation prevents moisture from building up inside the product
Advantages
- Prevents the product from spoiling
- Lets moisture escape
- Suitable for fresh and in-shell products
Suitable Products
Potatoes, onions, garlic, firewood, in-shell hazelnuts and walnuts, seeds
Comparison Table
| Property | Standard | Q-Bag | Type C | UN Certified | Ventilated |
|---|---|---|---|---|---|
| Stacking | Medium | Very good | Medium | Medium | Medium |
| Explosive atmosphere | Type C required | Type C required | Suitable | Together with Type C | Not suitable |
| Dangerous goods | Not suitable | Not suitable | Not suitable | Suitable | Not suitable |
| Ventilation | No | No | No | No | Yes |
| Food use | Optional | Optional | Optional | Optional | In-shell and fresh products |
Selection Guide
Food Industry
→ Standard or Q-Bag + BRC certified production + LDPE/EVOH liner
Chemical Industry
→ Type C Conductive (explosive dusts) or UN Certified (dangerous goods)
Agriculture
→ Ventilated (fresh and in-shell products) or UV-stabilised Standard (fertiliser, seeds)
Pharmaceutical Industry
→ Type C Conductive + high-barrier liner
The Karaca Big Bag Range
We manufacture all big bag types in our BRC IoP AA+ certified facility:
- Experience with 1000+ different configurations
- Custom design and engineering support
- Sample production
- Technical consultancy
Frequently Asked Questions
FAQ on This Topic
What is the difference between a standard big bag and a Q-Bag?
When is a Type C conductive big bag required?
What is a UN certified big bag used for?
Which products is a ventilated big bag suitable for?
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