HS Code for Vapour boilers

Vapour generating boilers are classified under HS code 8402.19 based on the General Rules for the Interpretation (GRI) of the Harmonized System, specifically GRI 1 and 6. Heading 8402 covers steam or other vapour generating boilers, excluding central heating hot water boilers capable also of producing low-pressure steam. Subheading 8402.19 is a residual category for boilers that are not water-tube boilers. In a water-tube boiler (8402.11/12), water circulates inside tubes heated externally by fire or gases. Conversely, the boilers in 8402.19 often utilize a fire-tube design where hot gases pass through tubes immersed in water, or they may be hybrid systems. The classification is determined by the primary method of heat exchange and the intended industrial application, typically involving high-pressure steam generation for power or mechanical work. These units are distinct from domestic heating systems due to their construction, pressure ratings, and the volume of vapour produced.

Products Included

• Fire-tube boilers
• Locomotive type boilers (non-water tube)
• Marine boilers of the fire-tube variety
• Hybrid vapour generating boilers not elsewhere specified
• Cylindrical boilers for industrial steam generation
• Horizontal return tubular (HRT) boilers

Common Misclassification

Vapour boilers are frequently confused with water-tube boilers classified under HS codes 8402.11 or 8402.12. The distinction lies in whether the water or the hot gas is inside the tubes. Additionally, they are often misclassified under HS code 8403.10, which is reserved for central heating boilers. Central heating boilers are generally designed for lower pressures and are used for space heating rather than industrial vapour generation. Another common error is using 8419.11 for instantaneous gas water heaters, which do not generate vapour but merely heat liquid water.

FAQ

What is the HS code for vapour boilers?

The HS code for vapour generating boilers (excluding water-tube boilers) is 8402.19.

How does 8402.19 differ from 8403.10?

HS code 8402.19 is for industrial-grade vapour or steam generation, whereas 8403.10 is for central heating boilers used for domestic or commercial space heating, typically operating at much lower pressures and temperatures.