9902.15.40 - Steam turbines, multi-stage, condensing type, direct drive, suitable for use with a generator, having an output of 27 MW or more but not over 40 MW, with an operating rotational speed more than 3500 RPM (provided for in subheading 8406.82.10)

This HTS category, 9902.15.40, specifically designates multi-stage, condensing steam turbines designed for direct drive applications with generators. Key distinguishing features include a power output range of 27 MW to 40 MW and an operating rotational speed exceeding 3500 RPM. These turbines are intended for industrial power generation where high efficiency and specific performance parameters are paramount.

While the Harmonized Tariff Schedule contains numerous categories for machinery and electrical equipment, this particular classification is unique due to its focus on a niche segment of industrial steam turbines. It is important to differentiate this from general turbine classifications found in Section XVI, which may cover a broader range of turbines without these precise power output or speed specifications. The 99xx codes, where this entry resides, are reserved for special provisions and temporary legislation, indicating a specific regulatory context beyond standard tariff treatment.

As a leaf node in the HTS database, 9902.15.40 does not have further subdivisions. Therefore, classification within this code relies entirely on meeting the detailed technical specifications outlined in its description. Importers must ensure their steam turbines precisely match the wattage range (27 MW to 40 MW) and rotational speed (over 3500 RPM) to qualify for this specialized classification. Any deviation would necessitate classification under a different, potentially broader, HTS provision.