7304.29.31.40/13-3/8 inch 72# L-80 Type 13Cr Casing/Japan

13-3/8 inch 72# L-80 Type 13Cr Casing from Japan

Seamless alloy steel oil well casing pipe with 13-3/8 inch OD (339.7 mm adjusted to hierarchy range), 72 lb/ft weight, L-80 grade with 13% chromium content for corrosion resistance in sour gas environments. Features API STC threaded couplings and wall thickness exceeding 12.7 mm, designed for oil and gas drilling casing strings. Classified under 7304.29.31.40 due to its seamless construction, alloy steel composition, coupled ends, and specified dimensions for heavy-duty downhole use.

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

• Verify API 5CT certification and exact wall thickness measurements to confirm HTS classification; provide mill test certificates (MTC) showing alloy composition

• Ensure couplings meet API STC standards to avoid reclassification as uncoupled tubing

• Watch for anti-dumping duties on Chinese-origin seamless pipes