Procedure Library
P23.6

Emergency Shutdown Protocol

Procedure 40 of 40 · Chapter 23 · §23.4.4

1 table 0 notes

Table 1

Isolation PointValve TypeClosure TimeActivationVerification
Bulk acid tank outletROSOV<10 sControl room + auto on gas detectSCADA position + local visual
Bulk caustic tank outletROSOV<10 sControl room + auto on high-levelSCADA position + local visual
Process vessel feed linesROSOV/pneumatic<15 sControl room HMIPosition feedback signal
Steam to jacketed vesselsMotorized<30 sControl room + low-pressure tripTemperature decay confirm
Transfer pumpsN/A (stop)<5 sMotor lockoutZero current at starter
Cooling waterMotorized<60 sManual (maintained open)Flow meter confirm
Fire waterN/AImmediateAuto on fire detectionPressure gauge confirm
Vent linesMotorized damper<30 sControl roomDamper position switch