16 Inch OD API 5CT C90 Sour Service Alloy Tubing from China
Seamless C90 grade alloy steel tubing with 16-inch (406.4 mm) outside diameter, optimized for H2S-containing sour gas wells. Provides balanced strength and sulfide stress cracking resistance. HTS 7304.29.61.60 due to alloy steel composition, seamless process, and precise diameter for oil/gas drilling tubing.
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 HIC (Hydrogen Induced Cracking) and SSCC test results per NACE TM0177 for sour service validation
• Confirm exact OD tolerance (±0.01 inch typical) stays within 215.9-406.4 mm bounds
• Avoid classification as casing if used strictly for production tubing applications