Bunker Compatibility - Spot Test
Bunker compatibility spot test (ASTM D4740) - precipitate observed when two fuels are mixed.
Compatibility
Compatible
Formula, assumptions, and limits
VLSFO from different refineries often incompatible → asphaltene precipitation + sludge. Test at 20 + 80 % ratios pre-bunker. Dedicated tank for each supplier reduces risk.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| ASTM D4740 score | - | ASTM |