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Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers; parts thereof: > Parts > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8402.90.00.90
Boiler Safety Valve Mounting Block
Machined steel block with valve seat for mounting ASME safety valves on steam boiler drums. HTS 8402.90.00.90 as critical safety component for pressure vessels.
Boiler Sootblower Lance
Retractable cleaning lance that extends into boiler gas passes to remove soot deposits during operation. Mechanical cleaning part for industrial steam boilers under HTS 8402.90.00.90.
Steam Drum Internals Assembly
Assembly of baffles, separators, and dryers installed inside boiler steam drums to remove moisture from generated steam. Specifically parts for heading 8402 vapor boilers under HTS 8402.90.00.90.
Water Column Mounting Flange
Specialized flange for attaching water level gauge columns to steam boiler drums, ensuring accurate level monitoring. Classifies under HTS 8402.90.00.90 for boiler instrumentation parts.
Boiler Handhole Door Assembly
Small access door assembly for inspecting boiler tubes through hand-sized openings in drum walls. HTS 8402.90.00.90 for water-tube boiler maintenance parts.
Steam Boiler Expansion Joint
Bellows-type expansion joint absorbing thermal movement between boiler sections in high-pressure steam systems. Specific part for HTS 8402.90.00.90 vapor generating boilers.
Boiler Fire Tube Replacement
A replacement fire tube designed for insertion into industrial steam generating boilers to facilitate heat transfer from combustion gases to water. It falls under HTS 8402.90.00.90 as a specific part of vapor generating boilers, distinct from central heating hot water boilers.
Steam Boiler Pressure Vessel Door
A heavy-duty access door for high-pressure steam boiler vessels, featuring reinforced flanges and pressure seals for safe maintenance. Classified under HTS 8402.90.00.90 as an essential part for vapor generating boilers.
Super-Heater Coil Assembly
Coiled tubing assembly that superheats steam within vapor generating boilers to increase efficiency and energy output. This part is specifically for boilers under heading 8402, hence HTS 8402.90.00.90.
Boiler Economizer Module
Heat recovery module installed in boiler exhaust stacks to preheat feedwater using waste gases from steam generation. Falls under HTS 8402.90.00.90 as a performance-enhancing part of vapor boilers.
Downcomer Pipe Section
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.
Boiler Feedwater Pump Impeller
Precision-machined impeller for high-pressure feedwater pumps supplying boilers with preheated water. HTS 8402.90.00.90 applies as integral pump part for vapor boiler operation.
Mud Drum Access Manway
Circular access port with bolted cover for cleaning sediment from lower mud drums in water-tube boilers. HTS 8402.90.00.90 classification for steam boiler maintenance parts.
Boiler Refractory Brick Set
High-alumina refractory bricks shaped for furnace walls in industrial steam boilers to withstand extreme combustion temperatures. Sold as sets for HTS 8402.90.00.90 boiler parts.
Burner Mounting Refractory Thimble
Cylindrical refractory sleeve that protects boiler casing where fuel burners penetrate furnace walls. Essential part for safe combustion in vapor generating boilers under HTS 8402.90.00.90.