Heavy Wall Seamless Boiler Tube from China
Seamless boiler tube with 177.8 mm OD and 28 mm wall thickness, made from nonalloy steel for high-pressure steam systems in industrial boilers. Precision-engineered for heat resistance and structural strength. Classified in HTS 7304.39.0044 matching its seamless, circular, nonalloy steel profile with OD 114.3-190.5 mm and wall ≥19 mm.
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
• ASME boiler code certification required; tubes may need pressure vessel markings for customs clearance
• Distinguish from structural tubing by end-use documentation; boiler tubes risk reclass to 7304.90 if not proven high-pressure
• Batch test reports must confirm no alloy elements exceeding nonalloy limits