Reduction of Gas Leakage
| Location | Action |
| Entrance door, exit door | Adjust pressure, install curtain |
| Corrosion or Damage | Repair & replace |
| Flange, manhole, inspection door | Inspect slackness, replace packing, change seal type, change material type |
| Seal (bush, grand packing, labyrinth, mechanical) | Inspect attrition, replace |
| Change labyrinth seal to mechanical | Repair manhole (N2 circulating dryer) |
Leakage : 200 m3/h  0.1 m3/h |
N2 leakage :decreased |
| Energy saving : 4800 kcal/h | N2 make up : 7 m3/h 1 m3/h |