Heat Exchanger Tube 200mm OD ASTM A179 from Japan
Cold-drawn seamless carbon steel tube, 200 mm OD per ASTM A179, optimized for condenser and heat exchanger shells in refining processes. Provides excellent heat transfer and corrosion resistance in water-steam cycles. HTS 7304.39.0006 applies due to seamless non-alloy steel, circular profile, and suitability for heat exchangers within 190.5-285.8 mm OD.
Duty Rate — Japan → 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
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Import Tips
• Submit heat transfer coefficient data or design specs confirming exchanger suitability
• Use NACE MR0175 certification if for sour service in refineries to aid customs review
• Document straight lengths only; coiled tubes may classify under 7304.90