Paper Pulp Digester
A large pressure vessel used to cook wood chips with chemicals and steam at high temperatures to break down lignin and produce paper pulp. It falls under HTS 8419.89.1000 as machinery for the thermal treatment process in making paper pulp. The cooking process involves heating and steaming to soften fibers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for general chemical processing beyond paper pulp
Machinery not dedicated to paper pulp shifts to other industrial machines in 8479.
If applied to food or beverage thermal processing
Thermal treatment equipment for non-paper industries falls under other 8419 subheadings.
If primarily functioning as a continuous-action pasteurizer
Pasteurizing machinery is separately provided for in 8419.60 regardless of end use.
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Import Tips & Compliance
• Verify equipment is specifically designed for paper pulp production with technical specs and manufacturer certifications
• Include detailed process descriptions in import docs to distinguish from general chemical reactors
• Ensure compliance with pressure vessel safety standards like ASME for customs clearance
Related Products under HTS 8419.89.10.00
Kraft Pulp Cooking Kettle
A steam-heated cooking kettle for the kraft process, digesting wood chips in white liquor to produce chemical pulp for paper. Classified in HTS 8419.89.1000 for its role in high-temperature digestion specific to paper pulp making. Involves steaming and chemical heating to delignify fibers.
Batch Pulp Defibrator Steamer
Equipment that steams wood chips in batches to soften them before mechanical defibrillation in pulp production. HTS 8419.89.1000 applies due to the steaming process involving temperature change for paper pulp preparation. Prepares fibers for paperboard manufacturing.
Paper Pulp Bleach Tower Heater
A vertical tower heater that maintains elevated temperatures during chemical bleaching of pulp to achieve brightness for paper. Falls under HTS 8419.89.1000 for thermal processing in paper pulp production. Controls temperature for optimal delignification and whitening.
Continuous Pulp Digester Cooker
Industrial cooker for continuous flow digestion of wood chips into pulp using steam and cooking liquors at controlled temperatures. HTS 8419.89.1000 covers this thermal change machinery dedicated to paper pulp. Enables high-volume paperboard production.
Pulp Washing Steam Conditioner
Steams and heats pulp slurry during washing stages to remove residual cooking chemicals before paper forming. Classified under HTS 8419.89.1000 for temperature-based treatment in pulp making. Optimizes pulp cleanliness for quality paper.
Paperboard Dryer Cylinder
Large steam-heated rotating cylinder that dries wet paperboard webs by direct contact heating in paper machines. HTS 8419.89.1000 includes this drying equipment for paper/paperboard production. Essential for moisture removal via temperature change.