The formalization of the overpack concept into the Canadian TDG regulations has been the subject of concern for domestic shippers of dangerous goods due to the wording for fully regulated (TDGR 4.10.1) products. The wording implies that even when the DG safety marks for packages within the overpack are visible, the overpack must still have an “OVERPACK” mark displayed. This leads to some additional labelling requirements, particularly for shippers of stretch-wrapped pallet loads.
We’ll pause to review the concept of an overpack, consistent among the various regulations (e.g. TDG, UN Model Recommendations, IMDG, IATA, & 49 CFR).
An overpack is non-standardized packaging that:
- Is used for handling convenience (e.g. to reduce multiple handling- I.e. 4 drums on a skid, allowing loading 4 at once rather than 4 trips, or 6 small containers in a “non-spec” master carton, or 48 small boxes stretch wrapped on a skid; a keg (small drum) in a non-spec box for stability, etc. )
- Cannot be used as a replacement for inadequate, required “standardized” packaging
- Is to be unopened between consignor and receiver
- Cannot interfere with the integrity of the standardized packaging (e.g. banding cutting into boxes on a pallet)
The common principle requires that the description of DG that cannot be seen once the overpack is in place will be reproduced on the outside of the overpack.
However, this could be misleading in that Continue Reading…