Quartz Glass Inner for Industrial Vacuum Reaction Vessel from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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