What does 49 CFR 178.33a-2 (Type and size) require?

Short answer

49 CFR 178.33a-2 requires single-trip inside containers to be seamless or have seams that are welded, soldered, brazed, double seamed, or swedged, with a maximum capacity of 1 L (61.0 cubic inches) and a maximum inside diameter of 3 inches.

The rule says

"Must be seamless, or with seams welded, soldered, brazed, double seamed, or swedged." (49 CFR 178.33a-2(a))

"The maximum capacity of containers in this class shall not exceed 1 L (61.0 cubic inches)." (49 CFR 178.33a-2(b))

"The maximum inside diameter shall not exceed 3 inches." (49 CFR 178.33a-2(b))

In plain English

This regulation sets specific requirements for the construction and size of single-trip inside containers used to transport hazardous materials. The containers must be made with seamless construction or have seams that are securely closed using specific methods. The size limits are in place to ensure the safe transportation of hazardous materials, and inspectors will check for compliance with these requirements during audits.

What to do

• Ensure all single-trip inside containers meet the seamless or seam construction requirements.
• Verify the maximum capacity of containers does not exceed 1 L (61.0 cubic inches).
• Check the maximum inside diameter of containers does not exceed 3 inches.
• Review and update container specifications and inspection procedures to ensure compliance with 49 CFR 178.33a-2.