Descaling Powder for Metal from Japan
Blended powder of sulfamic acid, phosphates, and inhibitors for immersion descaling of heat exchanger tubes. Under HTS 3810.90.5000 as metal pickling preparation, dissolves calcium/magnesium scale without hydrogen embrittlement. Rinse to neutral pH.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Scale composition efficacy data confirms pickling preparation status
• Inhibitor package prevents base metal attack validation
• Dissolution rate testing for concentration instructions