Cross-Linked Polyethylene (PEX) Resin from China
Cross-linked polyethylene resin undergoes chemical modification for enhanced heat resistance, used in plumbing pipes. It falls under 3901.90.90.00 per subheading note (a)(3) as chemically modified polymers classified in 'Other' unless more specific. Primary form pellets distinguish it from finished PEX tubing.
Duty Rate — China → United States
31.5%
Rate breakdown
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Document cross-linking process details to justify 'chemically modified' under note (a)(3) placement in 'Other'
• Avoid shipping as pre-cross-linked tubing to prevent reclassification to 3917.31 (flexible tubes)