Downcomer Pipe Section from Mexico
Large-diameter pipe that circulates hot water from boiler drum to lower mud drum in water-tube steam boilers. Classified as HTS 8402.90.00.90 for its role in vapor generating systems.
Duty Rate — Mexico → United States
14.3%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Specify seamless construction and pressure ratings matching boiler design codes
• Pair with riser pipe diagrams to show complete circulation system context