SA-335 Grade P11 Seamless Alloy Steel Pipe from China
This seamless pipe made from chromium-molybdenum alloy steel (SA-335 P11 grade) has a circular cross-section with an outside diameter between 285.8 mm and 406.4 mm and wall thickness of 12.7-19 mm. It falls under HTS 7304.59.80.65 as other seamless tubes/pipes of alloy steel, suitable for high-temperature boiler service. Commonly used in power plants for superheater tubes.
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
• Obtain material test certificates (MTC) confirming alloy composition and seamless manufacturing per ASTM A335 standards
• Verify exact OD and wall thickness measurements to ensure classification within 7304.59.80.65 subheading
• Include hydrostatic test reports; common pitfall is misclassification as welded pipe under Chapter 73 heading 7305