7304.39.00.04/ASTM A179 Carbon Steel Boiler Tube/China

ASTM A179 Carbon Steel Boiler Tube from China

Seamless carbon steel tube designed for use in heat exchangers and boilers, with an outside diameter of 50 mm, meeting ASTM A179 specifications for low-carbon steel suitable for bending and flanging. It falls under HTS 7304.39.0004 due to its seamless construction, circular cross-section between 38.1 mm and 190.5 mm OD, and explicit suitability for boilers and heat exchangers. These tubes are critical for high-pressure steam and water applications in industrial settings.

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
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Import Tips

• Obtain mill test certificates verifying seamless construction, chemical composition, and mechanical properties per ASTM standards to ensure compliance

• Confirm outside diameter measurement between 38.1-190.5 mm with precise caliper documentation to match statistical suffix

• Include end-use certification proving suitability for boilers or heat exchangers, as general steel tubes classify elsewhere