Federal safety agency issues final report into 2025 blast that killed 2 at Pennsylvania steel plant
Summary
A federal safety agency released a report on a deadly explosion in August 2025 at the Clairton Coke Works steel plant in Pennsylvania. The explosion killed two workers and injured 11 others while flushing a gas valve, and the report recommends new safety procedures to prevent similar accidents.Key Facts
- The blast happened at U.S. Steel’s Clairton Coke Works near Pittsburgh.
- Two workers died and 11 others were injured, including contractors.
- The explosion occurred during a routine maintenance task involving flushing a gas valve with pressurized water.
- The gas valve ruptured, releasing flammable coke oven gas.
- The Chemical Safety Board found that U.S. Steel had no formal, written procedure for flushing gas valves safely.
- OSHA fined U.S. Steel $118,214 and issued 10 safety citations due to incomplete and outdated safety practices.
- The valve that failed was over 70 years old and made of brittle cast iron, a material not recommended for flammable gas systems.
- The report suggested relocating buildings away from coke oven gas piping to reduce injury risk in case of future incidents.
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