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Mini-bulk container professionals, so you don't have to be!

SS Background

United Nations (UN)-Rated / DOT Recertified

At the time of manufacture, composite IBCs are certified for containing and transporting specific types of hazardous materials under the authority of the US Department of Transportation (DOT), and the IBC includes a label showing important relevant details about the container, as well as the United Nations international symbol.  After manufacture, every 30 months (2.5 years) or less, the IBC must be recertified through successful completion of Internal and External Inspection as well as Leakproofness Test, in accordance with 49 CFR 178.703, 178.813, and 180.352.  To be in compliance, the IBC must pass the inspections and test, be correctly re-labeled, and the appropriate documentation kept on file by the owner of the hazardous material to be shipped.  The following diagram shows the meanings of the marking sections on the UN label:

UN Mark Sample.png
SS Background

The Recertification Process

Many IBC reconditioning companies short-cut the recertification process, because it takes time, extra care, and a bit more cost to truly do the work correctly.  At Clean Tank Technologies, we have developed and implemented our own custom procedures and equipment so we can recertify IBCs in full compliance with the law, and yet keep costs reasonable.

Correct Procedure for a DOT Certified Reconditioner

  • Remove the inner tank from the cage

  • Inspect cage for damage, repair/replace, and clean

  • Remove inner tank accessories, inspect, and clean

  • Inspect inner tank for damage or non-removeable residue

  • Clean inner tank

  • Conduct leakproofness test on inner tank

  • Conduct impact test on inner tank

  • Re-install accessories, according to torque specs

  • Re-insert inner tank into cage, and reassemble unit

  • Final inspect unit for completeness

  • Apply correct labeling 

Leakproofness Test.png

Leakproofness Test In Progress

Questions to ask your reconditioned IBC supplier

10 Great Questions

  1. Do you know the IBC prior product?

  2. Do you remove the inner tank?

  3. Do you inspect the bottom of the inner tank?

  4. Do you inspect the cage pan under the inner tank?

  5. Do you pressurize the inner tank inside the cage?

  6. Do you just spray soapy water to test for leaks?

  7. Do you impact test the bottle under pressure?

  8. Do you have an M-number?

  9. Do you apply your own UN-labels?

  10. Do you provide DOT Recertification certificates?

Answers Should Be

  1. Yes, we know the origin of all our IBCs!

  2. Yes, that's how we inspect and test it!

  3. Yes, because we removed it!

  4. Yes, we removed the inner tank so we can see it!

  5. No, the pressure would bend and distort the cage!

  6. No, there are much better methods, like a dunk tank!

  7. Yes, that's the best way to reject brittle plastic!

  8. Of course! Only authorized reconditioners do!

  9. Definitely! With our M-number and test dates!

  10. Yes, for each recertified, uniquely identified IBC!

SS Background


Simply put, a non-DOT IBC is a container not intended for tranportation of hazardous material.  The IBC is not required to be DOT recertified as described above, and does not need UN-rated labeling or certificates.


HOWEVER, our procedure is the same for ALL standard reconditioned containers.  We remove the inner tank, inspect, and leakproofness test the IBCs, regardless of whether or not they are to be UN-rated/DOT recertified.

SS Background

PCC Compliant

For those IBC users that are required to comply with the Pesticide Container and Containment Regulations, IBCs  must be fully compliant with the rules of 40 CFR Part 165 Subpart C, §165.45(e):

Each opening (other than a vent) of a portable pesticide container designed to hold liquids must have a one-way valve, a tamper-evident device, or both.

A PCC compliant IBC includes:

  • Sealed and tamper-evident one-way (check) valve

  • Sealed and tamper-evident lid with a non-removeable venting lid plug

  • UN-Rated/DOT recertified labeling and certificates for the transportation of hazardous materials



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