Investigation Report
Equinor – Troll C – investigation of incident with gas cooler cracks
Equinor – Troll C – investigation of incident with gas cooler cracks
- Havtil
- Investigation Report
- Unknown
- CorrosionLoss of containmentPressure systemsStructural and asset integrity
- Inspection and maintenance
- Pressure vessel
- Fire protectionNon-destructive testingPreventive maintenance
- Upstream oil and gas
- Offshore installation
Summary
The PSA investigates externally initiated chloride stress corrosion cracking in Troll C’s second-stage gas coolers. Through-wall cracks compromised pressure containment, with potential for a major gas leak. Findings address coating inspection, preventive maintenance, consequence classification and passive fire protection. Penetrant testing revealed shell cracking; no harm to people or the environment was identified.
Classifications: Corrosion; corrosion damage.
Classifications: Loss of containment; containment loss.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Pressure vessel; pressure vessels.
Classifications: Fire protection; fire suppression; fire detection.
Classifications: Non-destructive testing; NDT; non-destructive examination; NDE.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.