How to Test UN-Rated Bulk Bags?

How to Test UN-Rated Bulk Bags

Every bulk bag, also known as a FIBC or jumbo bag, must pass rigorous performance tests. On the other hand, UN-approved bulk bags meet the highest criteria and are capable of withstanding the physical pressure of loaded contents, many of which are hazardous by nature. This is the reason why bulk bag manufacturers get a lot of orders for the UN-rated bulk bags from across the world. In this blog, we’ll take a closer look at how these enormous bags can adhere to UN safety regulations in order to ensure safe usage and handling.



The agricultural, construction, and chemical industries routinely handle chemicals and hazardous or flammable materials. These businesses receive help from heavy-duty packaging bags that are UN-certified for bulk storage and transportation in storing and moving hazardous materials safely. To lessen the risk of strange accidents happening while storing or transporting such items, these bags must fulfil rigorous testing specifications established by the UN.


How does a UN Certified Bulk Bag differ from a regular bulk bag?

Performance tests must be performed on all bulk bags. UN rated bulk bags, however, are subject to stricter performance requirements than regular bulk bags. These tests are used to confirm that the bag is secure enough to transport and store risky products.  Compared to conventional bulk bags, UN rated bulk bags often have heavier body, top, and base panel fabrics. It is essential to have a hefty top panel cloth in order to pass the challenging Topple Test and Righting Test.  A typical FIBC has a 5:1 Safety Factor (SF), which is the industry standard. Bulk bags that are UN-certified must have a 6:1 SF. 


Different methods of testing that have to be passed by the UN-Rated bulk bags

Since UN-Rated bulk bags are so famous for handling extra loads and physical pressure, they have to be passed through some of the most rigorous testing methods which are listed below.

  • Test of Top Lift

A hydraulic cylinder is used to apply pressure on the things inside the tested bag. The FIBC bag is put through a top lift test to see if it can withstand six times the level of its safe working load for five minutes in a row before receiving a UN rating.


  • Stacking Test

Throughout this process, the bag is placed on a flat surface and loaded to a safe operating load. The bulk bag is next tested to see if it can withstand pressure equal to two comparable bags for the following 24 hours.


  • Drop Test

According to the testing requirements of the packing group, FIBC bulk bags are loaded to a safe working load level before being dropped from a predetermined height. For the test to be certified by the UN, the bag cannot break during the test, and there must be no content leakage.


  • Topple Test

A platform with a safe loading level of contents holds the tested bag. After that, the platform is gradually elevated until the bag can only drop down without its contents leaking out.


  • Tear Test

If the bag is loaded safely, this will show whether it can withstand a 100 mm long knife cut. More than 25% of the tear will cause the contents to leak out.


  • Vibration Test

It takes the bulk bag an hour to remain stable and not tip over or break when it is put on a vibrating platform.


  • Righting Test

The enormous bag gets knocked upon its side after being loaded to its safe loading limit. Before being placed upright, the bag and its contents are examined to make sure there are no rips or tears.

HPBL’s  Bulk Bags are meticulously designed and tested to meet the highest safety and performance standards set by the UN. With our  commitment to quality and compliance, you can trust our UN-Rated Bulk Bags to provide a safe and efficient solution for handling hazardous materials in various industries.


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