</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
8402.90.00/Downcomer Pipe Assembly/Japan

Downcomer Pipe Assembly from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Calculate with your customs valueVerify classification with AI

Import Tips

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

Downcomer Pipe Assembly from Japan — Import Duty Rate | HTS 8402.90.00