UN certification markings

The transportation of hazardous goods is regulated worldwide by the United Nations to comply with the United Nations Recommendations on the Transport of Dangerous Goods, known as the ‘Orange Book’.  UN Certified FIBCs are manufactured and tested in accordance with the UN recommendations and assigned unique UN Cerficiation Marking numbers.  The numbers include markings to identify the FIBC packing information.  The following outlines what the individual markings mean.

Example of Markings for FIBCs

UN Certification Markings for Flexible Intermediate Bulk Containers


The 4 Types of FIBCs, as classified by the ‘orange book’:

  1. 13H1 –  PP woven FIBCs, without coating
  2. 13H2 –  PP woven FIBCs, coated
  3. 13H3 –  PP woven FIBCs, with liner, without coating
  4. 13H4 –  PP woven FIBCs, with liner and coating

The product numbers and corresponding packing group classifications as classified by the ‘Orange Book’:

For more information on the subject matter, please contact our FlexSack Experts at sales@flexsack.com.


GIVE US A CALL AT 205-620-9889

Get in touch



Physical address

Helena Industrial Park
545 Elm Street
Helena, AL 35080

Mailing address

P.O. Box 580
Helena, AL 35080

Send a message

5 + 3 =