HS Code for Vapour turbines (marine)

Vapour turbines designed for marine propulsion are classified under HS code 840610. This classification is driven by the specific application of the machinery rather than its technical specifications or power output. Heading 8406 covers steam and other vapour turbines, and the first sub-heading, 840610, is dedicated exclusively to those used for propelling vessels. These turbines are typically high-capacity units found in large commercial ships, tankers, and naval vessels. They operate by expanding high-pressure steam across sets of blades to drive a propeller shaft, often through a reduction gearbox. The classification is determined by the design intent and the presence of features specific to maritime environments, such as specialized mounting frames, corrosion resistance for salt-air exposure, and integration with marine control systems.

Products Included

• Main propulsion steam turbines for ships
• Marine vapour turbines for tankers
• Steam turbines for naval vessel propulsion
• Vapour turbines for large passenger liners
• Geared marine steam turbine sets

Common Misclassification

The most frequent misclassification is using HS code 840682 or 840681, which are for stationary industrial turbines. While the internal mechanics may be similar, the marine application takes precedence for 840610. Another error involves marine diesel engines, which are classified under heading 8408. If the propulsion system is a gas turbine rather than a steam/vapour turbine, it must be classified under 8411.

FAQ

What is the HS code for vapour turbines (marine)?

The HS code for steam or other vapour turbines used for marine propulsion is 840610.

Does 840610 include the reduction gears?

If the gears are presented as an integral part of the turbine unit, they may be classified together; however, separate gearboxes are typically classified under heading 8483.