HFC-227ea Dielectric Test Gas from China
HFC-227ea used for high-voltage dielectric strength testing of electrical switchgear and transformers. Pure compound under HTS 2903.46.10.00 with >45 kV/cm breakdown voltage. Non-corrosive to copper and aluminum contacts.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Dielectric strength certification per ASTM D2477 standards required
• Moisture content (<10 ppm) critical for high-voltage applications
• Cylinder valve compatibility testing for SF6 replacement gases