P23.6
Emergency Shutdown Protocol
Procedure 40 of 40 · Chapter 23 · §23.4.4
1 table 0 notes
Table 1
| Isolation Point | Valve Type | Closure Time | Activation | Verification |
|---|---|---|---|---|
| Bulk acid tank outlet | ROSOV | <10 s | Control room + auto on gas detect | SCADA position + local visual |
| Bulk caustic tank outlet | ROSOV | <10 s | Control room + auto on high-level | SCADA position + local visual |
| Process vessel feed lines | ROSOV/pneumatic | <15 s | Control room HMI | Position feedback signal |
| Steam to jacketed vessels | Motorized | <30 s | Control room + low-pressure trip | Temperature decay confirm |
| Transfer pumps | N/A (stop) | <5 s | Motor lockout | Zero current at starter |
| Cooling water | Motorized | <60 s | Manual (maintained open) | Flow meter confirm |
| Fire water | N/A | Immediate | Auto on fire detection | Pressure gauge confirm |
| Vent lines | Motorized damper | <30 s | Control room | Damper position switch |