FIBC bags, also known as flexible intermediate bulk containers (FIBCs), provide a cost-efficient and inexpensive solution when it comes to storing and transportation of material. FIBC bags come in a range of sizes and dimensions as well as FIBC specifications. Your FIBC bag must be the right size for you, your material and finally, your customer. Below are some points to how to select the size of a FIBC bag.

The Minimum Size:

For this, you have to determine the minimum size of your carrier. The only part of the bag that touches the carrier is the base. To ensure that your bags can fit inside your carrier, your bags width or length (whichever is longer) must be shorter than the capacity that your carrier can handle. Anything longer than that and your bags will not fit in the trailer.

Low-Density Materials: 

The easiest way to determine if you have a low-density or high-density material is to determine its weight. It’s relatively easy to say that you need a bigger bag to carry. However, Low-density materials weigh less, allowing you to choose a larger bag.

High-Density Materials:
High-density materials weigh more. Therefore, your bag must be smaller. These are still FIBC bags. If you have an unusually heavy product, you may want to consider a smaller bag. That way, the bag can handle more pressure per square inch without bursting or breaking.

Minimum and Maximum Dimensions:

When you determine your bag size, remember that, when you transport it, the only part of the bag that is in contact with your carrier is the base of the bag. However, don’t disrepair the fact that these are flexible bags. A properly filled bag will belly at the sides and increase your dimensions by up to 20 percent. You have the ability to prevent this – at an increased cost – by purchasing bags with internal baffles.


The filling inlet is usually on the top of the bag and can help you determine the size of the bag. When you fill your bag, never fill it 100 percent. Only fill it up to the 90 percent capacity line. This allows you to close your filling inlet completely.

Discharge Outlets: 

The discharge outlet is how your customer will empty the bag. Often times, the discharge outlet is held close with a drawstring. If you’re transporting packing peanuts, you may wish to have a large discharge outlet. However, if your product requires precise measurements, a smaller discharge outlet with a more controlled release may be necessary.

Lifting Loops:
Lifting loops come in all sorts of sizes. Usually, the lifting loops are designed to go around the tines of a fork on a forklift. They usually hang loose on the side of the bag until they’re ready to be used. When they are used, they need an overhead clearance.


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