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
75%
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
9903.91.0125%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
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
• 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