Carbon Steel Heat Exchanger Tube OD 168mm WT 9mm from Mexico
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 — Mexico → United States
50%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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