4-Loop FIBC Overview

Greif’s extensive range of 4-Loop FIBCs (big bags) serves a wide variety of dry-bulk handling applications, providing customers with a safe and sturdy semi-bulk packaging solution. Special 4-Loop FIBCs have been developed to provide total containment for powder, granular, and flake products while protecting against hazards such as moisture and electrostatics. 4-Loop FIBCs can be designed and produced in different sizes and configurations to meet your and your customers’ needs.

4- Loop FIBC (Big Bag)

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Standard types of 4-Loop FIBCs

Greif 4-Loop FIBCs are custom-designed for specific customer needs. However, most of our 4-Loop FIBCs are broadly classified by the three standard constructions described below. Please contact us to learn which FIBC is best for your application.

 

Corner Loops

  • Flat fabric (U-panel or 4-panel) FIBCs
  • Lifting loops sewn to the vertical seams

Safe Working Load Safety Factor Design
300-2000 kg 5:1 Single Trip
300-1500 kg 6:1 Multi Trip
300-1500 kg 6:1 UN Dangerous Goods

 

Cross Corner Loops

  • Circular or flat fabric
  • Lifting loops sewn cross corner

Safe Working Load Safety Factor Design
300-1500 kg 5:1 Single Trip
300-1500 kg 6:1 Multi Trip
300-1500 kg 6:1 UN Dangerous Goods

 

Tunnel Loops

  • Flat Fabric
  • Lifting loops formed out of fabric

Safe Working Load Safety Factor Design
300-2000 kg 5:1 Single Trip
300-1500 kg 6:1 Multi Trip

 

 

Greif 4-Loop FIBCs conform to the ISO 21898:2004 definitions for safe working load (SWL) and safety factors (SF)

 

Other Definitions:

  • Single Trip: An FIBC designed and intended to be used for one filling only. 
  • Multi Trip (standard duty re-usable): An FIBC designed and intended to be used for a limited number of fillings and discharges. An FIBC of this category cannot be re-used if damaged, i.e. is not repairable. The replacement of a removable inner liner is allowed.
  • UN Dangerous Goods: designed to ensure safe transport of dangerous materials
     

4- Loop FIBC (Big Bag)

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Greif Formstable 4-Loop FIBCs – superior stability optimizes transport and storage

Even when filled with product, a Greif Formstable FIBC maintains its straight sides. Bulging is prevented, and the entire package fits cleanly within the footprint of a pallet. This provides several money-saving benefits to customers:

  • Optimal transport loading – up to 30% more volume of your product can be packed in an ISO container or truck
  • More efficient warehouse storage
  • Enhanced stability in stacking and transport – greater product protection and safer for workers
  • Lower freight costs, less pallets, and fewer FIBCs

 

Formstable 4-Loop FIBCs with Baffle

One way that form-stability can be achieved is by sewing polypropylene “baffles” to sides of the FIBC, across each of the four corners. When the FIBC is filled, the baffles prevent the sides from bulging out – a stable shape is achieved.

Greif offers two types of baffles: 

Greif’s Standard Baffle Greif’s Net Baffle
A standard baffle is a polypropylene panel with properly-spaced holes to allow the free flow of product during the fill and discharge process The innovative Greif Net Baffle is constructed with polypropylene tapes and strings. This innovated design  possesses minimal surface area, which ensures full and even distribution of your product and effective flow during filling and discharging.

 

Formstable 4-Loop FIBCs with Liners

Standard Greif 4-Loop FIBCs can also attain form-stability when fitted with Greif Formstable Liners. These polyethylene liners are constructed with inner, ultrasonically-welded corner panels that give the liners (and their outer bags) a stable, cube shape when filled with your products.

 

We can also supply Greif Formstable Liners with protective barriers to shield your products from the environment and to guard against unwanted oxidation, moisture, and aromas.

4- Loop FIBC (Big Bag)

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Greif UN 4-Loop FIBCs – safely transport dangerous goods

Around the world, the transportation of hazardous products is regulated within a framework established by the United Nations (UN) Subcommittee of Expert on the Transport of Dangerous Goods. It provides consistent international guidelines to prevent accidents and damages to people, property, and the environment.

When you work with Greif Flexible Products & Services, you’re leveraging a team that can make certain your FIBCs have been designed, tested, and manufactured within full adherence of these UN regulations. 


Greif’s UN Test Lab

Greif's FIBC UN test laboratory is authorized by BAM Berlin to conduct tests in accordance with the UN dangerous goods regulations. We can immediately implement official UN dangerous goods markings after completing a successful test of a new design type.

Top Lift Test Tear Test Drop Test Topple Test
Stacking Test Righting Test

 

UN Markings

All FIBCs carrying dangerous goods must be accurately labeled with the proper UN markings. Our experienced technicians are very familiar with the regulations, and we'll ensure that your bag is correctly marked.

  
 Example of UN Markings for FIBCs

 13H2/Z/03.12/A/PA-03/48192-GREIF01/5427/1005

the United Nations packaging symbol
13 Flexible IBC for solids, filled or discharged by gravity
H2 Woven PP fabric with inner liner
Z Approved for packaging group III
03.12 Month and year of manufacture
A Country authorizing the allocation of the mark
PA-03 Code of Certifying Body
48192 Identification of IBC as specified by competent authority
GREIF01 Name of the manufacturer and number of identification
5427 Stacking test load in kilograms (1.8 times of the maximum permissible gross mass that may be stacked on top)
1005 Maximum permissible gross mass in kilograms

4- Loop FIBC (Big Bag)

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Greif Antistatic 4-Loop FIBCs – reduce the risk of electrostatic ignitions

At Greif, safety is our top priority. When filling or discharging products with certain ignition properties or in explosive atmospheres, it’s critical to take precautions against the risk of electrostatic discharge. We offer a comprehensive range of FIBCs specifically designed for antistatic applications. 

The antistatic classifications of our FIBCs are described below. Please contact us to discuss specific needs.

FIBC Type Type A Type B Type C Type D
Description No protection against electrostatic discharge. Can prevent propagating discharge.
Type B's are similar to Type A's, but with a thin coating which results in a breakdown voltage of less than 6 kV .
Grounded during filling and discharging to safely dissipate static electricity.
Type C's have 
an interconnected grid of conductive threads and grounding tabs.

Type C FIBC
Static charges are dissipated by the corona effect, and grounding of the FIBC is not necessary. 
Type D's have antistatic fabric with permanent dissipative threads.

Type D FIBC
Application Non-combustible products in non-flammable surrounding. Certain flammable products when not filled or discharged in an explosive gas or vapor atmosphere. Certain flammable products and in the presence of flammable gases or vapors with ignition energies ≥ 0,14 mJ. Certain flammable products and in the presence of flammable gases or vapors with ignition energies ≥ 0,14 mJ.

 

Greif’s Electrostatic Type D Test Laboratory – Accredited and Recently Enhanced

With our recent upgrades, our electrostatic lab possesses state-of-the-art testing capabilities similar to those of the leading independent testing facilities. We have the ability to carry out the following tests on antistatic FIBCs:

  • Gas ignition
  • Electrical breakdown voltage
  • Electrical resistance
  • Charge transfer

Type D Test

The tests are carried out according to IEC 61340-4-4 Standards. At least 200 ignition attempts on the test FIBC are made. The whole sequence of ignition attempts is made on each of the four walls of the test FIBC (50 ignition attempts on each wall). Additional attempts are made on any panel attached to the FIBC. After completing the ignition attempt no ignition should occur on the test FIBC. The tests are carried out with ethylene and enriched air mixture having a MIE of 0,14 mJ.

 

When To Use a Greif Antistatic FIBC

Bulk Product:
MIE (Minimum Ignition Energy) of Dust
FIBC Type for Different Surroundings
Non-flammable Atmosphere Explosive Dust Atmosphere Explosive Gas and Vapor Atmosphere
MIE > 1000 mJ A, B, C, D B, C, D C, D
1000 mJ > MIE > 3 mJ B, C, D B, C, D C, D
MIE < 3 mJ C, D C, D C, D

 

General Warnings

  • Do not use FIBCs in the presence of flammable atmospheres with ignition energies < 0.14 mJ.
  • Do not use FIBCs in the presence of Hydrogen, Acetylene and Carbondisulfide (Group IIC according to EN 50014).
  • In order to prevent incendive spark discharges from the surface of Type B and D FIBC, it shall not become contaminated or coated with conductive material (e.g. water, grease, or oil).
  • Additional precautions are necessary when a flammable gas or vapor atmosphere is present inside the FIBC (e.g. in case of wet solvent powders).
  • An important safe working practice with any type of FIBC in combustible dust and/or vapor and gas atmospheres includes grounding of all conductive materials, equipment and personnel in and around the flammable surrounding.
  • Please consult with Greif for more information about the use of our Antistatic FIBCs
  • All conductive objects in the vicinity of a Type D FIBC must be grounded

4- Loop FIBC (Big Bag)

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Greif 4-Loop FIBCs – available with many top and bottom configurations

4- Loop FIBC (Big Bag)

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4 loop FIBC

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Greif Flexible Products & Services was created in 2010 through the acquisitions of: