| Quality specification for SF6 | |||||
| Item | Unit | IEC-376 | ASTMD2472 | Zhongli Standard | |
| SF6 Purity | %(m/m) | ≥99.8 | ≥99.8 | 99.96 | 99.99 |
| O2+N2 | %(m/m) | ≤0.05 | ≤0.05 | 0.02 | 0.006 |
| CF4 | %(m/m) | ≤0.05 | ≤0.05 | 0.02 | 0.02 |
| Acidity(expressed HF) | ug/g | ≤0.3 | ≤0.3 | 0.2 | 0.2 |
| Hydralysable Fluoride (expressed HF) | ug/g | ≤1 | ≤1 | 0.5 | 0.5 |
| Moisture | ug/g | ≤5 | Dew p oint ≤-50℃ |
2 | 2 |
| Oil Content | ug/g | ≤10 | ≤5 | 3 | 2 |
| Toxicity | / | pass | pass | pass | pass |
| Total impurity | 0.04 | 0.01 | |||
