Be Part of the Ultimate Safety & Compliance Community
Trending news, knowledge-building content, and more – all personalized to you!
Certain types of hazardous materials have elevated temperatures during transport. Sometimes, the materials are intentionally heated due to the nature of the material. Other times, the elevated temperatures are due to a chemical reaction that has given off heat (an “exothermic” reaction).
Elevated temperature materials have special requirements under the hazardous materials regulations.
Shipping papers. The shipping papers must:
Markings 172.325. Bulk packaging containing elevated temperature materials must:
Placards 172.504. Bulk packages containing elevated temperature materials may require placards, such as Class 3 or Class 9. The Class 9 placard is not required for domestic transport.
Residue 173.29(g). A package that contains a residue of an elevated temperature material may remain marked as when it contained a greater quantity, even though it no longer meets the definition of an elevated temperature material.
Exceptions. For a bulk packaging containing solid elevated temperature materials, the regulations require only that the word “Hot” be on two opposing sides of the packaging (173.247(h)(4)).
Bulk packaging used to transport molten metals and molten glass by rail are excepted from the packaging requirements in 173.247, if restricted to operating speeds less than 15 mph and a notation indicating this is on the shipping papers (173.247(h)).