UN BIG BAGS
UN Big bags for packing dangerous goods. The UN issued recommendations on the transportation of dangerous goods. These define how strong an Big Bag for dangerous goods must be and set the standards how it has to be tested.
UN BAG TYPES
UN bags for dangerous materials in various specifications. Compared to standard FIBC, UN big bags are extra strong constructed in order to prevent leakage of the dangerous materials even when the big bag is in a stressed situation. Every UN bag design is tested by an independent test house.
UN bags can be divided into four major types, which we can supply to you:
♦ 13H1 uncoated fabric and without inliner.
♦ 13H2 coated fabric and without inliner.
♦ 13H3 uncoated fabric and with inliner.
♦ 13H4 coated fabric and with inliner.
UN bags have some limitations regarding their design.
UN bags must not be higher than twice the shortest side. They cannot have a larger volume than 3.0m3
The big bag cannot have an open top or a simple flap closure.
UN bags are not repairable and can be used only one time.
HOW UN BAGS ARE TESTED:
Top lift test
The big bag is loaded with six times its maximum gross mass and kept under this weight for 5 minutes. The big bag must not have any damage from this.
The big bag is loaded to its maximum allowable gross weight. Than 1.8 times the maximum stacking weight is loaded on top of the test bag for 24 hours. The big bag passes the test if there is no deterioration of the body or loss of content.
The big bag is loaded with its maximum permissible gross mass and dropped from a) 1.2m if packaging group II and b) 0.8m if packaging group III. The UN bag shall not have loss of content.
A 10cm hole is cut with a knife into a fully loaded UN bag. Then the double of the maximum gross load is applied to the UN bag for 5 minutes. The UN big bag is then lifted for 5 minutes. The UN bag passes if the hole does not increase by more than 25%.
The UN bag is toppled from a) 1.2m height if packaging group II and b) 0.8m height if packaging group III. The bag shall not have loss of material.
The UN bag is fully filled with its maximum permissible weight. The UN bag lying on its side is then lifted with a speed of 0.1m/s to upright position. The bag shall not have damage from this.
FILLING AND DISCHARGING OPTIONS
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