What does 49 CFR 172.310 (Class 7 (radioactive) materials) require?

Short answer

49 CFR 172.310 requires specific markings on packages containing Class 7 (radioactive) materials, including the gross mass, type of package, and international vehicle registration code of the country of origin. The regulation also requires markings for Type B(U) and Type B(M) packages, including a radiation symbol and the specification marking "USA".

The rule says

1. "Each package with a gross mass greater than 50 kg (110 lb) must have its gross mass including the unit of measurement (which may be abbreviated) marked on the outside of the package." (49 CFR 172.310(a))

2. "Each industrial, Type A, Type B(U), or Type B(M) package must be legibly and durably marked on the outside of the packaging, in letters at least 12 mm (0.47 in) high, with the words TYPE IP-1, TYPE IP-2, TYPE IP-3, TYPE A, TYPE B(U) or TYPE B(M), as appropriate." (49 CFR 172.310(b))

3. "Each package which conforms to an IP-1, IP-2, IP-3 or a Type A package design must be legibly and durably marked on the outside of the packaging with the international vehicle registration code of the country of origin of the design." (49 CFR 172.310(c))

4. "Each package which conforms to a Type B(U) or Type B(M) package design must have the outside of the outermost receptacle, which is resistant to the effects of fire and water, plainly marked by embossing, stamping or other means resistant to the effects of fire and water with a radiation symbol that conforms to the requirements of appendix B of this part." (49 CFR 172.310(d))

In plain English

Complying with 49 CFR 172.310 requires attention to detail when marking packages containing Class 7 (radioactive) materials. The regulation mandates specific markings to ensure safe handling and transportation. For example, packages over 50 kg must have their gross mass marked, and Type B(U) and Type B(M) packages require a radiation symbol and the "USA" specification marking. Failure to comply with these requirements can result in delays, fines, or even accidents.

What to do

• Verify the gross mass of the package and mark it accordingly.
• Ensure the correct type of package is marked (e.g., Type IP-1, Type A, Type B(U)).
• Include the international vehicle registration code of the country of origin for IP-1, IP-2, IP-3, or Type A packages.
• Mark Type B(U) and Type B(M) packages with a radiation symbol and the "USA" specification marking.