Failure of LP Separator Inlet Isolation Valve Stem Packing resulting in hydrocarbon leak through actuator ‘tell tale’ ports

Cause & Consequence

• Uncontrolled release of a flammable gas or liquid

Incident Location

Fixed Installation

Incident Activity

Production operations

Specific Incident Equipment

12” 1500# RTJ WKM Thro Conduit Gate valve with Axelson pneumatic spring return linear actuator.

Lessons Identified

All valves of this type or similar should be surveyed and maintenance histories reviewed for each. Any valves with potential to leak in a similar fashion should be considered for isolation and potential repair.

Consideration should be given to modifying the stem packing retention mechanism on all valves of a similar design

Incident Recommendations

Valves of similar design have been identified and are being assessed for repair. Modifications to stem packing retention mechanism will be carried out on all similar valves irrespective of their condition upon inspection. Any valves with potential to leak in a similar fashion should be considered for isolation and removal for repair at the earliest opportunity