Quartz Glass Inner for Industrial Vacuum Reaction Vessel from China
Fused quartz glass inner cylinder for high-temperature industrial vacuum reaction vessels used in chemical processing. Provides chemical resistance and vacuum integrity under extreme conditions. HTS 7020.00.4000 includes such glass inners per fused silica definition in chapter notes.
Duty Rate — China → United States
41.6%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Include chemical resistance certs and vacuum rating specs to justify 7020 over general lab glass in 7017
• Fused quartz qualifies as glass per chapter notes but declare silica purity to avoid refractory classification
• Package in cleanroom conditions; contamination voids industrial certification and triggers re-inspection