Ask X3What does 49 CFR 173.151 (Exceptions for Class 4) require?
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As Ask X3, your fleet-compliance assistant, here is what 49 CFR 173.151 requires for Class 4 shipments:
According to 49 CFR 173.151, exceptions for Class 4 hazardous materials shipments are only permitted if this specific section is referenced in the § 172.101 table. Depending on the material and transport method, the requirements and exceptions include:
* Limited Quantities of Division 4.1 (Flammable Solids) & Charcoal Briquettes (Packing Group III):
* Excepted from labeling (unless transported by aircraft) and specification packaging requirements when using authorized combination packagings.
* Excepted from shipping papers, unless the material is a hazardous substance, hazardous waste, marine pollutant, or transported by aircraft/vessel.
* Excepted from placarding (subpart F of part 172).
* Each package must meet subpart B packaging requirements and have a maximum gross weight of 30 kg (66 pounds).
* Inner packaging limits (except for aircraft): Packing Group II flammable solids cannot exceed 1.0 kg (2.2 lbs) or 1 L (0.3 gal) net capacity each; Packing Group III flammable solids cannot exceed 5.0 kg (11 lbs) or 5.0 L (1.3 gal) net capacity each. Charcoal briquettes must not exceed 30 kg gross weight.
* Limited Quantities of Division 4.3 (Dangerous When Wet Solids or Liquids):
* Excepted from labeling (unless transported by aircraft) and specification packaging requirements when using authorized combination packagings.
* Excepted from shipping papers, unless the material is a hazardous substance, hazardous waste, or marine pollutant, or transported by aircraft/vessel.
* Excepted from placarding (subpart F of part 172).
* Each package must meet subpart B packaging requirements and have a maximum gross weight of 30 kg (66 pounds).
* Inner packaging limits (except for aircraft): Packing Group II solids cannot exceed 0.5 kg (1.1 lbs) net capacity each; Packing Group III solids cannot exceed 1.0 kg (2.2 lbs) net capacity each, packed in a strong outer packaging.
* Motor Vehicle Only Transport for Lithium (UN1415), Potassium (UN2257), and Sodium (UN1428):
* Net quantity per inner packaging cannot exceed 25 grams.
* Excepted from labeling and placarding when prepared using a specific 4-step packaging method: (1) placed in a tightly closed plastic bottle submerged in mineral oil; (2) placed inside a securely closed plastic bag to prevent leaks/punctures; (3) placed in a metal can with void spaces filled with oil-absorbing material and sealed tight; (4) placed into a heat-sealed barrier bag.
* Marking: Inner plastic bottles, outer metal cans, and barrier bags must be marked with the chemical name, quantity, and the offeror's name and address. The outer packaging must have the proper shipping name, identification number, and the marking: “FOR TRANSPORT BY MOTOR VEHICLE ONLY.”
* Recordkeeping: Preparation, packaging, and marking must be documented (noting all components), and records must be kept for a minimum of 5 years, accessible at the shipper's principal place of business, and made available upon request to the Associate Administrator or designated official.
* Reverse Logistics:
* Except for Division 4.2 and self-reactive materials, items meeting the definition of "reverse logistics" and complying with paragraph (b