Membrane Nitrogen Generator Module from China
Hollow fiber membrane modules separate nitrogen from air by allowing oxygen and other gases to permeate through semi-permeable membranes under pressure. Classified under HTS 8421.39.0140 for its specialized gas separation function in industrial inert gas supply.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide membrane permeability specs and N2 purity test results to confirm gas separation capability
• Label as 'industrial gas separation' to distinguish from consumer air purifiers
• Check for pressure vessel certifications (ASME/DOT) for safe customs clearance