8406 - Steam turbines and other vapor turbines, and parts thereof:
Sub-classifications
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8406 10
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8406 1010 00
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8406 1090 00
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8406 81
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8406 8110
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8406 8110 20
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8406 8110 70
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8406 8190 00
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8406 8210
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8406 8210 10
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8406 8210 20
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8406 8210 50
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8406 8210 70
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8406 8290 00
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8406 90
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8406 9020 00
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8406 9040 00
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8406 9045
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8406 9045 40
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8406 9045 80
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8406 9050 00
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8406 9070 00
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8406 9075 00
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Overview
Category 8406 encompasses steam turbines and other vapor turbines, along with their essential components. These machines harness the thermal energy of steam or other vaporized fluids to produce mechanical work, typically through the rotation of a shaft. They are fundamental to power generation in various industries, including electricity production, industrial processes requiring motive power, and propulsion systems.
Within the broader framework of Section XVI, which deals with machinery and mechanical appliances, Chapter 84 specifically addresses nuclear reactors, boilers, machinery, and mechanical appliances. Category 8406 stands apart from its sibling categories, such as those for live animals (Chapter 01), by focusing exclusively on complex mechanical devices designed for energy conversion and power generation. Its scope is distinct from other machinery covered in Chapter 84, such as engines or pumps, due to its unique operational principle of utilizing vapor expansion.
This category is further detailed by its subcategories, which differentiate turbines based on their application and by classifying their constituent parts. Subcategory 8406.10 specifically addresses turbines designed for marine propulsion, highlighting a distinct end-use. The subsequent subdivisions, such as "Other turbines," capture a wide range of turbines not designated for marine applications. Finally, subcategory 8406.90 is dedicated to parts, allowing for the precise classification of components that are integral to the functioning of these turbines but are imported or exported separately.