8406.81.10 - Steam turbines

This HTS classification, 8406.81.10, specifically covers steam turbines and other vapor turbines designed for a substantial power output exceeding 40 megawatts (MW). These are high-capacity turbines, typically employed in industrial power generation facilities, large manufacturing plants, or central power stations, where significant mechanical power is required to drive generators or other heavy machinery. The defining characteristic for inclusion in this subcategory is their power output rating, distinguishing them from smaller turbines classified elsewhere.

Within the broader category of "Other turbines" (8406.8), this specific sub-heading focuses exclusively on those with an output exceeding 40 MW. It is differentiated from the sibling category, 8406.81.90.00 ("Other"), which would encompass turbines of similar types (steam or vapor) but with an output not exceeding 40 MW. Therefore, the critical determinant for classification under 8406.81.10 is the stated power generation capacity of the turbine itself.

Further refinement within this category is provided by its subcategories. 8406.81.10.20 designates stationary steam turbines of the condensing type, which are designed for continuous operation in power plants and utilize a condenser to convert exhaust steam back into water. The alternative subcategory, 8406.81.10.70 ("Other"), captures all other turbines exceeding 40 MW that do not fall under the specific description of condensing stationary steam turbines, allowing for the classification of other configurations or specialized designs within this high-output segment.