Seamless Pressure Piping for Refineries from China
Heavy-duty seamless pipe for refinery process piping, 184.2 mm OD with 32 mm wall thickness from nonalloy steel. Engineered for corrosive hydrocarbon service at elevated temperatures. HTS 7304.39.0044 for seamless nonalloy steel circular tubes in specified OD/wall dimensions.
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
• NACE MR0175 sour service certification often required; affects material classification proof
• Distinguish refinery pipe from OCTG via service affidavits to avoid higher OCTG duties
• Thickness verification critical; exceeds 19 mm threshold ensures correct statistical break