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.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If designed for combustion turbine applications
Diaphragms for other vapor turbines are classified in 8411, differentiated by working fluid.
If imported as unfinished cast iron/steel components
Unmachined castings are articles of iron/steel in Chapter 73, prior to turbine-specific processing.
If functioning as crankshafts or plain shaft bearings
Transmission shafts/bearings in 8483 if not integral to steam energy conversion.
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Import Tips & Compliance
• Provide material composition (e.g
• high-temperature alloys) and CAD models to substantiate steam turbine specificity
• Ensure invoices specify 'for steam turbines only' to prevent shifts to generic castings under 7325 or 8419
Related Products 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.