Carbon Steel Heat Exchanger Tube OD 168mm WT 9mm from China
Seamless carbon steel tube designed for heat exchangers in petrochemical plants, OD 168 mm (6-inch nominal), wall thickness 9 mm. Fits HTS 7304.39.0036 as seamless nonalloy steel tube with circular cross section, specified OD range, and thin wall. Enhanced for corrosion resistance in heat transfer applications.
Duty Rate — China → United States
35%
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
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Specify if plain end or U-bent; U-bends may require different classification if extensively formed
• Include hydrostatic test pressure ratings in documentation for pressure tube verification
• Confirm carbon steel chemistry (C ≤ 0.3%) to maintain nonalloy classification