HC leak from MOL pig launcher door due to seal failure

Cause & Consequence

• Uncontrolled release of a flammable gas or liquid

Incident Location

Fixed Installation

Incident Activity

Production operations

Specific Incident Equipment

Pig Launcher

Lessons Identified

• The quality of the door seal installation may not have been as per procedure
• There was no requirement documented for further leak test requirements if there was a prolonged waiting period after the initial test

Incident Recommendations

• Ensure specified trade discipline change the door seal as per procedure ‘Operation and Maintenance of Band Lock Seals’
• Upgrade Pig Launcher door seal to ensure fit for service
• Review Pig Launcher door design philosophy
• Update procedure to clearly define leak test requirements (retest after prolonged period)