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8402.90.00/Downcomer Pipe Assembly/Mexico

Downcomer Pipe Assembly from Mexico

Downcomer pipes circulate unheated water from steam drum to boiler lower headers in natural circulation systems. HTS 8402.90.00 covers these dedicated circulation components. Heavy wall seamless construction.

Duty Rate — Mexico → United States

14.3%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Calculate pipe sizing for circulation rates; hydrotest at 1.5x MAWP; ensure seamless construction certification