K55 Surface Casing from Japan
K55 grade surface casing to stabilize shallow formations during initial drilling phases of oil and gas wells. Under HTS 7306.29.81.50 as other casing, provides structural support before deeper strings. Common 13-3/8" diameter for conductor applications.
Duty Rate — Japan → United States
50%
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
9903.05.900%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
• Document coupling type (STC/LTC/BTC) explicitly for customs tariff verification
• Use steel racks over wooden for heavy casing to meet phytosanitary standards
• Avoid describing as 'structural pipe' to prevent general pipe classification