Cause & Consequence
- Uncontrolled release of a flammable gas or liquid
Specific Incident Equipment
Ring tight joint on a non- return valve.
- On investigation, the break out results from the stud bolts showed that the bolts were under torqued.
- Ensure close adherence to torqueing procedures and ensure that the torque applied is revalidated when any hydrocarbon system flanges have been broken and made-up. This confirms the requirement to ensure that only competent personnel are involved in the breaking and make-up of bolted joints.
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