High Viscosity Bunker Fuel (Biodiesel)
Blended bunker fuel exceeding 125 SUS at 37.8°C, API under 25°, with biodiesel where petroleum oils form >70% basic constituents. Classified under HTS 2710.20.0520 for heavy residual fuels in shipping. Essential for slow-speed diesel engines.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If <70% petroleum oils
Lower petroleum content preparations are 'other' under 2710.99.
If for topped crude equivalents
Topped or reduced crude oils have specific subheadings if not fully refined.
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Import Tips & Compliance
• Use certified viscometers for 37.8°C testing; include density at 15°C on COA
• Pitfall: Temperature conversion errors in Saybolt readings cause misclassification
Related Products under HTS 2710.20.05.20
Bunker C Heavy Fuel Oil
Bunker C is a heavy residual fuel oil with high viscosity exceeding 125 Saybolt Universal seconds at 37.8°C, derived from petroleum refining residues. It falls under HTS 2710.20.0520 as a distillate and residual fuel oil testing under 25 degrees A.P.I., containing biodiesel blends where petroleum oils exceed 70% by weight. Primarily used for marine propulsion in large ships.
No. 6 Fuel Oil (Biodiesel Blend)
No. 6 fuel oil is a high-viscosity residual fuel with Saybolt Universal viscosity >125 seconds at 37.8°C and API gravity under 25 degrees, blended with biodiesel to meet the 70%+ petroleum oil requirement. Classified in HTS 2710.20.0520 for heavy fuel oils used in industrial boilers and power generation. It requires preheating for proper flow.
Marine Heavy Fuel Oil (HFO 380)
HFO 380 is a heavy fuel oil for marine engines with viscosity >125 Saybolt seconds at 37.8°C, API <25°, and biodiesel incorporation where petroleum exceeds 70%. It matches HTS 2710.20.0520 for blended residual fuels not elsewhere specified. Used in oceangoing vessels requiring heated storage.
Industrial Boiler Heavy Fuel Oil
This heavy fuel oil for large industrial boilers has Saybolt viscosity over 125 seconds at 37.8°C, under 25° API, with biodiesel making petroleum oils >70% of composition. HTS 2710.20.0520 covers such residual blends for stationary combustion. It provides high energy density for manufacturing plants.
Power Plant Residual Fuel Oil (B20 Blend)
A B20 biodiesel blend (20% biodiesel, 80% petroleum residual) with viscosity >125 SUS at 37.8°C and <25° API, used in utility power plants. It qualifies for HTS 2710.20.0520 as petroleum-dominant heavy fuel oil preparation. Designed for efficient combustion in large turbines.
IFO 180 Heavy Marine Fuel
IFO 180 (Intermediate Fuel Oil) is a blended heavy fuel with >125 Saybolt viscosity at 37.8°C, <25° API, incorporating biodiesel while maintaining >70% petroleum base. HTS 2710.20.0520 applies to this marine-grade residual for auxiliary engines. Meets global bunkering standards.