TMP Pulp Double-Disc Refiner Disc Segment
Segmented alloy steel discs for thermomechanical pulp (TMP) double-disc refiners treating wood chips into pulp stock. These discs are parts of machinery for making pulp of fibrous cellulosic material, classified under tariff item 8439.91.00.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the discs are used in paper refining rather than pulp refining
Paper machinery parts fall under a different tariff item.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Declare the disc segments as parts of TMP refining machinery under 8439.91.00
• Provide documentation showing their use in wood chip refining
• Ensure the alloy composition is specified for customs purposes
Related Products under Tariff item 8439.91.00
Blow Tank Pressure Valve
A high-pressure relief valve for pulp blow tanks that discharge cooked pulp from digesters safely. This valve is a part of machinery for making pulp of fibrous cellulosic material, classified under tariff item 8439.91.00.
Brown Stock Thickener Drive Gear
A precision drive gear for vacuum rotary thickeners that dewater brown stock pulp prior to bleaching. This gear is a part of machinery for making pulp of fibrous cellulosic material, falling under tariff item 8439.91.00.
Cellulosic Stock Cleaner Hydrocyclone Liner
A wear-resistant polyurethane liner for hydrocyclone pulp cleaners, used to remove heavy contaminants from cellulosic stock during pulp preparation. This liner is a replaceable component of machinery for making pulp of fibrous cellulosic material, falling under tariff item 8439.91.00.
Chip Bin Vibrator Motor Mount
A custom vibration isolation mount for motors on wood chip storage bins in pulp mills. This mount is a part of machinery for making pulp of fibrous cellulosic material, classified under tariff item 8439.91.00.
Chip Feeder Screw Conveyor
A robust screw conveyor section for feeding wood chips into pulp digesters at controlled rates. This conveyor is a part of machinery for making pulp of fibrous cellulosic material, falling under tariff item 8439.91.00.
Continuous Digester Feed Valve Actuator
A pneumatic actuator for feed valves in continuous pulp digesters controlling chip/liquor flow. This actuator is a part of machinery for making pulp of fibrous cellulosic material, classified under tariff item 8439.91.00.