| Quantity of equipment components associated with fugitive emissions in typical petrochemical and chemical plants [26] | ||
| Component | Quantity range | Average quantity |
| Pump | 10 - 360 | 100 |
| Valve | 150 - 46,000 | 7400 |
| Fitting | 600 - 60,000 | 12,000 |
| Open end pipeline | 1 - 1600 | 560 |
| Sampling joint | 20 - 200 | 80 |
| Pressure release valve | 5 - 360 | 90 |
| VOCs fugitive emission without LDAR control in typical petrochemical and chemical plants [26] | ||
| Component | Annual average VOC emission (t/a) | Proportion (%) |
| Pump | 19 | 3 |
| Valve | 408 | 62 |
| Fitting | 201 | 31 |
| Open end pipeline | 9 | 1 |
| Sampling joint | 11 | 2 |
| Pressure release valve | 5 | 1 |
| Total | 653 | - |