On September 25, 1998, a devastating explosion and fire at Esso's Longford gas plant in Victoria, Australia, killed two workers and injured eight others. It caused a two-week gas supply shutdown to the state of Victoria, affecting 1.4 million households and 89,000 businesses, with economic losses estimated at A$1.3 billion.
๐ฅ What Went Wrong?
The disaster resulted from a chain reaction caused by low temperature embrittlement:
· The Incident: A pump failed, stopping the flow of hot oil. Cold gas entered a heat exchanger (GP905), cooling parts of it to -48°C, making the steel brittle.
· The Rupture: When the pump restarted, it sent 230°C oil into the brittle vessel. The sudden temperature shock caused it to rupture, releasing 10 tonnes of gas that ignited.
⚖️ The Royal Commission Findings
Contrary to Esso's initial claims of "operator error," the Royal Commission found Esso fully responsible, citing systemic safety failures:
· Inadequate Training: Operators lacked procedures to manage complex "upsets" like the pump failure.
· Poor Design: The layout lacked isolation valves, causing the fire to spread uncontrollably.
· Warning Fatigue: An excessive number of alarms desensitized operators to critical warnings.
· Remote Management: Moving engineers to Melbourne reduced on-site technical supervision.
๐ Consequences and Legacy
The findings led to significant legal and regulatory changes:
· Record Fine: Esso was fined A$2 million** (a record at the time) and paid **A$32.5 million in a class-action settlement.
· New Regulations: Victoria introduced Major Hazard Facility regulations, requiring strict safety cases and management systems for high-risk plants.
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