HS Code for Styrofoam sheets

Styrofoam sheets are classified under HS code 3921.11 because they consist of cellular polymers of styrene. According to the General Rules of Interpretation (GRI) 1 and 6, products are classified based on the terms of the headings and any relative section or chapter notes. Heading 3921 covers other plates, sheets, film, foil, and strip of plastics. Within this heading, the classification is further refined by the physical structure of the plastic. The term \"cellular\" refers to plastics that have many cells (either open, closed, or both) dispersed throughout the mass, which is the defining characteristic of expanded polystyrene (EPS) or extruded polystyrene (XPS) commonly known as Styrofoam. Since these sheets are made specifically from styrene polymers and possess this foamed, lightweight structure, they are precisely situated under subheading 3921.11. This classification applies regardless of whether the sheets are used for thermal insulation, buoyancy components, or protective padding, provided they remain in basic sheet form and have not been further worked into specific finished articles like cups or boxes.

Products Included

• Expanded Polystyrene (EPS) insulation boards
• Extruded Polystyrene (XPS) rigid foam sheets
• Cellular styrene blocks for construction
• Foamed styrene sheets for craft and display use
• High-density cellular styrene panels

Common Misclassification

Styrofoam sheets are frequently misclassified under HS code 3920.30. However, heading 3920 is reserved for plates and sheets that are non-cellular and not reinforced or laminated. If the styrene sheet is solid and lacks the foamed internal structure, 3920.30 is correct, but for Styrofoam, 3921.11 is mandatory. Another common error is using 3923.10, which covers boxes and cases for the conveyance or packing of goods. While Styrofoam is used for packaging, 3923.10 only applies to finished containers, not the raw sheets or planks.

FAQ

What is the HS code for Styrofoam sheets?

The primary HS code for cellular sheets made of styrene polymers is 3921.11.

Does this code include Styrofoam packing peanuts?

No, packing peanuts are typically classified under 3926.90 as other articles of plastics, as they are molded into specific shapes rather than being sold as sheets or plates.