E-2510 Re-boiler channel head flange leak

Cause & Consequence

• Uncontrolled release of a flammable gas or liquid

Incident Location

Fixed Installation

Incident Activity

Production operations

Specific Incident Equipment

Re-boiler channel head flange

Lessons Identified

The investigation concludes that loose bolts were the cause of the leak. One bolt was only hand tight and others were only about 80% of the recommended torque settings. The channel head had been removed during the shutdown earlier in the year.

Since that shutdown there have multiple production trips and the associated pressure and temperature changes may also have contributed to the loosening of the bolts (this is less likely).

Incident Recommendations

1. Check similar joints for leaks.

2. Review incident with Contractor and review procedures followed.