Offshore Derrick Crown Block from Japan
The crown block is the fixed sheave assembly at the top of an offshore drilling derrick/platform, guiding the drilling line for hoisting operations (HTS 8431.43.40.00). Built to withstand extreme loads on floating production platforms using 8430.41/8430.49 boring equipment. A principal mechanical part for offshore oil/gas drilling rigs.
Duty Rate — Japan → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) 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
• Certify safe working load (SWL) matching platform specs (e.g
• 2M lbs); provide NDT reports on sheaves/bearings; distinguish from onshore by documenting marine corrosion protection