Emergency Shutdown System Pre-Operation Test Log

Pre-operation inspection and test log for an emergency shutdown (ESD) system on a gas carrier, covering ESD-1 initiators, valve closure timing, surge pressure alleviation, and restoration checks before commissioning or return to service.

Inspection Details

• Vessel / facility name recorded
• Date and time of pre-operation test recorded
• Inspector and competent person identified
• System status confirmed as pre-operation / out of service for testing

ESD-1 Initiator Functional Tests

• High-high level initiator trips the ESD-1 circuit
• High pressure initiator trips the ESD-1 circuit
• Initiator setpoint recorded for each tested device
• Trip response observed at the control panel / alarm annunciator
• Reset and rearm function verified after test

Shutdown Valve Closure Timing

• ESD shutdown valve closure time measured
• Measured closure time within approved acceptance criteria
• Valve position indication matches actual valve position
• No abnormal leakage, sticking, or delayed actuation observed

Surge Pressure Alleviation and Process Protection

• Surge pressure alleviation device or logic activated as designed
• Maximum observed pressure during shutdown recorded
• Pressure transient remained within approved operating limits
• No unintended process upsets, line hammer, or secondary trips observed

Deficiencies, Corrective Actions, and Signoff

• Deficiencies or non-conformances documented
• Corrective action required for any failed critical item
• Inspector signature