2713 - Petroleum coke, petroleum bitumen and other residues of petroleum oils or of oils obtained from bituminous minerals:

This HTS category, 2713, encompasses a range of residual products derived from the distillation or refinement of petroleum oils and oils obtained from bituminous minerals. Specifically, it covers petroleum coke, which is a solid carbonaceous residue produced during petroleum refining processes, and petroleum bitumen, a heavy, viscous form of petroleum often used in road construction and roofing. The category also includes "other residues," which are less specific materials that remain after primary petroleum processing and do not fall into more refined product classifications.

In the context of Chapter 27, which deals with mineral fuels and oils, this category is distinct from preceding entries that cover crude petroleum, motor fuels, lubricating oils, and waxes. While all originate from petroleum, the products within 2713 are byproducts or residues of these primary refining operations. It is crucial to differentiate these from, for instance, finished lubricating oils (Chapter 27) or plastics derived from petroleum (Chapter 39), based on their specific physical and chemical properties and intended uses as residual materials.

Within this broad category, further subdivisions exist to refine classification. Petroleum coke is identified as a distinct subcategory. Petroleum bitumen is also separately classified, typically distinguished by its rheological properties and application. Finally, "other residues" captures any remaining materials from petroleum refining that do not fit the specific definitions of petroleum coke or bitumen, ensuring comprehensive coverage of these less commonly defined petroleum derivatives.