HC Leak from Compressor Cylinder Head

Cause & Consequence

• Uncontrolled release of a flammable gas or liquid

Incident Location

Fixed Installation

Incident Activity

Production operations

Specific Incident Equipment

Variable Volume Pocket o-ring seal

Lessons Identified

• O-ring was not properly installed but the system passed a pressure test

• Installation in congested area may have caused problems

• Bolt under tensioning allowed gas to pass at discrete location on the o-ring

• Torque wrench was in certification but calibration was suspected as incorrect

Incident Recommendations

• Care needed when installing o-rings in congested areas as they may be misaligned or become damaged.

• Check calibration of torque wrenches regularly