Don't Get Burned Shipping Elevated-temperature Materials
In the Hazardous Materials Regulations (HMR), the US DOT sets specific requirements for elevated-temperature materials. Simply put, these are materials shipped at high temperatures. Common examples of elevated-temperature materials include asphalt and roofing tar.
While these materials are generally shipped the same way as other hazmat, a few additional requirements apply. Knowing the rules for these materials is critical to ensure your shipments comply with the HMR and will reach your customers safely and on time.
Classifying Elevated-temperature Materials
Defined by the US DOT at 49 CFR 171.8, an elevated-temperature material is a material "which, when offered for transportation or transported in a bulk packaging:
- Is in a liquid phase and at a temperature at or above 100°C (212°F);
- Is in a liquid phase with a flash point at or above 38°C (100°F) that is intentionally heated and offered for transportation or transported at or above its flash point; or
- Is in a solid phase at a temperature at or above 240°C (464°F)."
Unique Marking and Labeling Requirements
Additional communication requirements apply to elevated-temperature materials as well. Each bulk packaging containing material must be marked on two or four sides with the word "HOT." There are two options for displaying this marking:
- Either display the word "HOT" in the center of an otherwise blank placard-sized marking; or
- Display the word "HOT" in the upper third of a white square-on-point device that also displays the identification number of the hazmat. [49 CFR 172.325]
The markings must be displayed in association with the usual hazard placards.
Shipping Paper Requirements
In addition to communication requirements for bulk packages, the word "HOT" must also appear on shipping papers. It must immediately precede the Proper Shipping Name, unless the words "elevated temperature" are already included in the Proper Shipping Name. [49 CFR 172.203(n)]
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