ASTM A106 Grade B Seamless Boiler Tube 20-inch OD 30mm Wall from China
High-temperature seamless carbon steel tube conforming to ASTM A106 for boiler and superheater applications, with 20-inch (508 mm) OD and 30 mm wall thickness. Classified in HTS 7304.39.0080 for its seamless iron/nonalloy steel construction, circular profile exceeding 406.4 mm OD, and thick walls ≥19 mm. Ideal for pressure vessels in power plants.
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
• Provide hydrostatic test certificates and chemical composition analysis to confirm nonalloy steel status
• Label clearly as 'seamless' to distinguish from welded tubes; customs may require NDT reports
• Check for ASME boiler code stamping requirements for end-use compliance in regulated industries