Distilled fuel oil (DFO)
Provisional fuel targets for industrial heating.
A proposed Rerol grade for furnace and burner use, not automotive fuel. Review the engineering targets and confirm fuel classification, permitted end use and actual batch results before release.
Technical specifications · Rev 0.1 · 02 Nov 2026
Distilled Fuel Oil (DFO)
Provisional Rerol grade for furnace / burner use; not an automotive fuel.
A. Proposed industrial performance targets
| PROPERTY | REROL ENGINEERING TARGET | TEST |
|---|---|---|
| Appearance | Homogeneous; no free water or debris | Visual |
| Density @ 15 °C | 850-950 kg/m3 (provisional) | ASTM D4052 |
| KV @ 50 °C | 5-60 mm²/s (provisional) | ASTM D445 |
| Flash point, PMC | ≥66 °C; ≥70 °C preferred | ASTM D93 |
| Pour point | ≤18 °C (application dependent) | ASTM D97 |
| Water | ≤0.20% by volume | ASTM D95 |
| Sediment | ≤0.10% by mass | ASTM D473 |
| Ash | ≤0.05% by mass | ASTM D482 |
| Total sulphur | ≤1.5% by mass; stricter if required | ASTM D4294 |
| Gross calorific value | Report; 9,800-10,500 kcal/kg indicative | ASTM D240 |
| Carbon residue | ≤5% by mass, proposed target | ASTM D4530 |
B. Waste-derived-fuel contaminant gate (where applicable)
| CONTAMINANT | RELEVANT MAXIMUM | BASIS |
|---|---|---|
| PCB | <2 mg/kg | Schedule V Part B |
| Lead / Arsenic | ≤100 / ≤5 mg/kg, respectively | Schedule V Part B |
| Cd + Cr + Ni combined | ≤500 mg/kg | Schedule V Part B |
| PAH / total halogens | ≤6% / ≤4,000 mg/kg | Schedule V Part B |
| Sulphur / water / sediment | ≤4.5% / ≤1.0% v/v / ≤0.25% m/m | Schedule V Part B |
IMPORTANT DFO is a working trade description, not itself an IS-grade certification. IS 1593:2018 is the reference for furnace/fuel-oil grades (LV grade has ≤80 cSt @ 50 °C and ≥66 °C flash point), but full conformance requires all applicable tests.
DISPATCH Confirm fuel classification and permitted end use with TNPCB / the purchaser. Release only against the actual batch COA, including relevant contaminants; do not blend nonconforming hazardous material into fuel.
REFERENCE BASIS IndianOil IS 1593:2018 fuel-oil table; Hazardous and Other Wastes Rules, 2016 Schedule V Part B.