Federal Safety Agency Issues Final Report Into 2025 Blast that Killed 2 at Pennsylvania Steel Plant
The valve was a cast-iron part more than 70 years old, and the blast killed two workers and injured 11 others, the CSB said.
- On Monday, the U.S. Chemical Safety and Hazard Investigation Board released its final report on the August 11, 2025, explosion at Clairton Coke Works that killed two workers, injured 11 others, and caused more than $52 million in property damage.
- Investigators found the failed cast-iron valve was more than 70 years old, and U.S. Steel lacked formal procedures for the valve-cleaning operation, relying instead on ad hoc water washing that over-pressurized the equipment.
- Federal investigators criticized U.S. Steel for failing to conduct a facility siting analysis; the plant experienced a similar gas oven explosion in July 2010 injuring a dozen workers, yet buildings remained undesigned to withstand explosions.
- The Quinn family filed lawsuits against Nippon Steel, MPW Industrial Services Inc., and Valves Incorporated, alleging Nippon Steel failed to ensure plant safety and MPW used liquid water instead of steam in valve cleaning.
- United Steelworkers District 10 director Bernie Hall urged U.S. Steel management to address safety concerns following a fatal incident at Granite City Works, as the union bargains for a joint labor-management facility siting committee.
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Federal safety agency issues final report into 2025 blast that killed 2 at Pennsylvania steel plant - WXXV News 25
By JOHN RABY A federal safety agency recommended the development of written policies and procedures for flushing gas valves a year after a blast at a U.S. Steel plant near Pittsburgh killed two workers. The U.S. Chemical Safety and Hazard Investigation Board issued a final report into the August 2025 blast at Clairton Coke Works, which also injured 11 others, including contractors. U.S. Steel has said the explosion happened when workers were f…
Associated Press News
Federal safety agency issues final report into 2025 blast that killed 2 at Pennsylvania steel plant
A federal safety agency has issued its final report into a 2025 blast at a U.S. Steel plant near Pittsburgh that left two workers dead.
US Steel could have prevented 2025 Clairton Coke Works explosion, federal investigators say
On the eve of the one-year anniversary of a deadly explosion at U.S. Steel Clairton Coke Works, federal investigators released a long and sharply worded report, accusing U.S. Steel and its contractor of not just ignoring procedures to ensure safety but not even having them.
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