Curtis Marine Steam Turbine
A multi-stage impulse steam turbine designed specifically for marine propulsion in naval vessels, utilizing high-pressure steam to drive propellers. Classified under HTS 8406.10.10.00 as a steam turbine for marine propulsion, distinct from gas or other vapor turbines.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for stationary power generation rather than propulsion
Stationary steam turbines for electricity generation fall under subheading 8406.81, not marine propulsion specific.
If powered by gas rather than steam
Gas turbines for marine propulsion are classified in Chapter 84 heading 8411, differentiated by working fluid.
If integrated into a complete marine engine system as a set
Machines with specific functions not elsewhere specified, like assembled propulsion units, may go to 8479.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify turbine specifications confirm marine propulsion use via manufacturer certifications to avoid reclassification to general steam turbines
• Include detailed engineering drawings and steam flow diagrams in documentation for customs valuation and origin verification
• Check for ITAR restrictions if destined for military vessels, as marine steam turbines often involve defense applications
Related Products under HTS 8406.10.10.00
Parsons Reaction Marine Steam Turbine
A reaction-type steam turbine for ship propulsion, featuring partial admission blades for efficient steam expansion in maritime applications. Falls under HTS 8406.10.10.00 due to its design for marine steam propulsion.
Westinghouse Geared Marine Steam Turbine
Geared steam turbine system for merchant ships, reducing high turbine speeds to propeller RPM via reduction gears for propulsion. HTS 8406.10.10.00 applies as it's a complete steam turbine for marine use.
MAN Diesel Marine Steam Turbine
High-efficiency marine steam turbine from MAN Diesel for cruise ship propulsion, optimized for superheated steam cycles. Classified in 8406.10.10.00 for its specific marine propulsion function.
GE Marine Impulse Steam Turbine
Impulse stage marine steam turbine by GE for frigates and destroyers, emphasizing high-speed propulsion with velocity-compounded stages. HTS 8406.10.10.00 due to marine steam turbine designation.