7304.29.31.40/12-1/4 inch 75# C-110 Sour Service Casing/Japan

12-1/4 inch 75# C-110 Sour Service Casing from Japan

C-110 grade seamless alloy casing optimized for H2S sour service, 12-1/4 inch OD (311.2 mm within hierarchy), 75 lb/ft weight with thick walls ≥12.7 mm, full API STC couplings. Used to case wells with corrosive hydrogen sulfide content. Classified in 7304.29.31.40 for threaded, coupled, heavy-wall alloy steel oilfield casing.

Duty Rate — Japan → United States

10%

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
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Import Tips

• Certify NACE MR0175/ISO 15156 compliance for sour service; declare sulfide stress cracking test data

• Common issue: incorrect alloy content declaration affecting duty rates

• Bundle lengths must be specified (typically 40 ft)

12-1/4 inch 75# C-110 Sour Service Casing from Japan — Import Duty Rate | HTS 7304.29.31.40