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Steam turbines and other vapor turbines, and parts thereof: > Parts: > Of steam turbines: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8406.90.45
Steam Turbine Rotor Assembly
A precision-engineered rotor assembly designed for high-speed rotation within steam turbines to convert thermal energy into mechanical power. Classified under HTS 8406.90.45 as a part of steam turbines, specifically under 'other' parts not covered by more specific subheadings. It is essential for power generation in industrial and utility applications.
Steam Turbine Nozzle Ring Assembly
Circular arrays of precision nozzles that accelerate steam into high-velocity jets impinging on turbine blades. HTS 8406.90.45 covers this as other parts of steam turbines, optimizing expansion efficiency. Critical for combined-cycle power plants.
Steam Turbine Blade Carrier Disc
Forged discs that serve as carriers for turbine blades, providing structural support in high-pressure stages. Classified as other parts under HTS 8406.90.45 for steam turbines. Vital for aerospace-derived industrial turbines.
Steam Turbine Exhaust Casing Section
Low-pressure casing segments directing exhaust steam to condensers, fabricated from specialized alloys. Under HTS 8406.90.45 as other parts of steam turbines. Key for vacuum efficiency in Rankine cycle plants.
Steam Turbine Generator Coupling
Flexible disc or gear-type couplings synchronizing turbine and generator shafts for grid-stable operation. HTS 8406.90.45 as other steam turbine parts. High misalignment tolerance for base-load plants.
Steam Turbine Thrust Bearing
Tilting pad thrust bearings absorbing axial loads from steam pressure differentials on rotors. Under HTS 8406.90.45 for other steam turbine parts. Oil-lubricated for continuous 24/7 operation.
Steam Turbine Bellows Expansion Joint
Multi-ply stainless steel bellows compensating for thermal expansion between turbine casing sections. HTS 8406.90.45 as other steam turbine parts. Critical for alignment in high-temperature environments.
Steam Turbine Rotor Support Bracket
Heavy fabricated steel brackets supporting turbine rotor assemblies during maintenance or transport. Classified under HTS 8406.90.45 as other steam turbine parts. Ensures safe handling of megawatt-scale rotors.
Steam Turbine Emergency Overspeed Governor
Mechanical backup governors detecting rotor overspeed and triggering steam valve closure independently of electronics. HTS 8406.90.45 for other steam turbine parts. Redundant safety per nuclear plant requirements.
Steam Turbine Blade Locking Kit
Specialized pins, keys, and rivets securing blades to turbine discs against centrifugal forces. Sold as maintenance kits under HTS 8406.90.45 other steam turbine parts. Allows field replacement without disc removal.
Steam Turbine Coupling Shaft
High-strength forged shafts connecting turbine rotors to generators or loads, transmitting rotational power. Falls under HTS 8406.90.45 as other steam turbine parts, designed for extreme torque. Used in cogeneration facilities.
Steam Turbine Diaphragm Staging
Stationary diaphragm assemblies with guide vanes that direct steam flow onto turbine blades for optimal energy extraction. Falls under HTS 8406.90.45 as 'other' parts of steam turbines, distinct from rotors or casings. Used in multi-stage turbines for efficient power output in thermal plants.
Steam Turbine Bearing Housing
Robust housing units that encase and support journal or thrust bearings in steam turbines, maintaining shaft alignment under high loads. Classified in HTS 8406.90.45 as other steam turbine parts, essential for vibration control and longevity. Applied in both utility-scale and marine propulsion turbines.
Steam Turbine Sealing Gland
Labyrinth or brush-type sealing glands preventing steam leakage along rotating shafts in turbines. HTS 8406.90.45 as other steam turbine parts, enhancing efficiency. Standard in supercritical power plants.
Steam Turbine Trip Valve Block
Manifold blocks housing emergency trip valves that rapidly cut steam supply for overspeed protection. Classified HTS 8406.90.45 as other steam turbine parts. Mandatory safety component per ASME codes.