No. 6 Fuel Oil Residual Blend
Industrial residual fuel oil blending straight-run and cracked residues, with Saybolt viscosity over 125 seconds at 37.8°C and low API gravity under 25 degrees, used for power generation and heating. Classified under HTS 2710.19.06.35 due to its heavy fuel characteristics and >70% petroleum oil content without biodiesel.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used primarily in marine vessels
Bunker-specific heavy fuels have distinct subheadings from general industrial heavy oils.
If lower viscosity versions
No. 6 equivalents with 45-125 SUS viscosity are in separate viscosity bands.
If aromatic content >50% (e.g., high benzol)
Aromatic-rich oils like those with >50% benzene shift to Chapter 27 aromatics headings.
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Import Tips & Compliance
• Submit ASTM D88 viscosity test results; ensure no biodiesel presence via fatty acid methyl ester analysis; declare exact blend composition to prevent misclassification as lighter fuels
Related Products under HTS 2710.19.06.35
Heavy Bunker Fuel Oil MGO 380
A heavy fuel oil with a Saybolt Universal viscosity exceeding 125 seconds at 37.8°C and API gravity under 25 degrees, used primarily for marine propulsion in large ships. It falls under HTS 2710.19.06.35 as a distillate and residual fuel oil that is neither crude nor biodiesel-containing, meeting the specific viscosity and gravity criteria for heavy fuel oils.
Industrial Boiler Heavy Fuel Oil HFO-180
Heavy fuel oil grade HFO-180 for stationary boilers, exhibiting >125 SUS viscosity at 37.8°C and API <25°, derived from petroleum residues. It qualifies for HTS 2710.19.06.35 as 'other' heavy fuel oils not specified elsewhere, containing ≥70% basic petroleum oils.
Marine Heavy Fuel Oil IFO 380 cSt
Intermediate Fuel Oil (IFO) 380 specification for oceangoing vessels, with kinematic viscosity converting to >125 SUS at 37.8°C and API under 25°, blended from residual streams. Falls under HTS 2710.19.06.35 as other heavy distillate/residual fuel oils.
Power Plant Residual Fuel Oil RFO 200
Residual fuel oil RFO 200 for electricity generation turbines, meeting heavy fuel criteria of >125 seconds Saybolt viscosity at 37.8°C and sub-25° API gravity. HTS 2710.19.06.35 covers this as other non-crude, non-biodiesel heavy fuel preparations ≥70% petroleum oils.
Heavy Asphalt Flux Oil
Petroleum flux oil used in asphalt production, with high viscosity >125 SUS at 37.8°C and low API <25°, serving as a softening agent for bitumen. Classified in HTS 2710.19.06.35 as other heavy fuel oils though primarily industrial intermediate.
Blended Heavy Fuel Oil for Cement Kilns
Custom-blended heavy fuel oil for rotary cement kilns, featuring >125 SUS viscosity/ <25° API from residual and cracked stocks ≥70% petroleum base. HTS 2710.19.06.35 applies to these unspecified heavy fuel oils unfit for lighter classifications.