Superheater Coil Assembly from Japan
Coiled high-temperature alloy tubes that superheat saturated steam from boilers to increase energy content and efficiency in power generation. Classified as parts under HTS 8404.90.00.00 for auxiliary plant used with boilers of 8402 or 8403. Essential for turbine performance in steam power units.
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%
Import Tips
• Include pressure ratings and temperature specs in documentation to confirm classification as superheater parts
• Ensure origin certificates for alloys to qualify for preferential tariffs under USMCA or similar agreements
• Avoid common pitfall of declaring as generic 'pipes'; specify 'superheater elements for steam boilers'