4-1/2 Inch 12.6 lb/ft N80-1 Stainless Casing from China
Liner casing 4-1/2 inch with N80-1 grade stainless steel, threaded and coupled for intermediate hole sections. Used in horizontal drilling applications. HTS 7304.24.30 due to seamless stainless construction and oilfield casing function.
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
• Ensure coupling stock certificates trace to same heat as pipe body
• Document premium class thread inspection (VAM TOP, USCO) if not standard API
• Verify collapse and burst ratings meet or exceed API 5CT minimums