Safety Alert
H2S released during rig reactivation activities
H2S released during rig reactivation activities
- IADC
- Safety Alert
- IADC Alert 23-5
- Hazardous SubstancesHydrogen Sulphide
- CorrosionExplosionHydrogen sulphideLoss of containment
- Storage tanks
- Upstream oil and gas
- Port and quayside
Summary
During quayside rig reactivation, hydrogen sulphide escaped from a machinery-space bilge water tank after its top hatch was removed, threatening nearby personnel. The alert describes acute inhalation dangers, including immediate collapse at concentrations above 1,000 ppm, alongside steel corrosion and flammable or explosive concentration limits.
Classifications: Corrosion; corrosion damage.
Classifications: Explosion; explosive atmospheres.
Classifications: Hydrogen sulphide; H2S; H₂S; hydrogen sulfide.
Classifications: Loss of containment; containment loss.
Classifications: Storage tanks; atmospheric tanks.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Port and quayside; quayside; harbour; harbor.
Summary
The alert concerns hydrogen sulphide release during rig reactivation activities.
IADC Alert 23-5. Themes: hazardous substances, hydrogen sulphide.