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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If generic pipe flanges
Pipe system flanges without boiler-specific features go to Chapter 73.
If part of complete level instruments
Instrument parts with electronic components classify in Chapter 90.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include tri-cock test valve provisions in technical description
• Document weld preparation for drum attachment per boiler code
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.
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.