Rough stability screen - residual fuel is stable if Reserve = P-value − 1 ≥ 0.4. Values below 0.2 indicate impending asphaltene precipitation.
Formula
$$ \text{Reserve} = P_\text{value} - 1 $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $P-value$ | Peptization value (ASTM D7060) | - | lab report |
| $Reserve$ | P-value − 1 | - | result |
Sources
- ASTM D7060.
- ISO 8217 Annex F guidance.