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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other refractory ceramic goods
Shaped refractories not dedicated to boilers classify as other ceramics.
If industrial furnace parts
Furnace/burner parts outside steam boiler context go to heading 8417.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Match thimble dimensions to specific burner models for classification support
• Include expansion joint design specs for thermal cycling proof
Related Products 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.