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Gas Valve Failure During Routine Maintenance May Have Led to Fatal Blast at Plant, US Steel Says

The explosion at the nearly 110-year-old Clairton Coke Works killed two workers and injured 10 others, prompting expanded air quality monitoring for hazardous pollutants, officials said.

  • The explosion at U.S. Steel's Clairton Coke Works occurred during planned maintenance when workers were flushing a gas valve, leading to valve failure and an explosion of coke oven gas, according to U.S. Steel.
  • The U.S. Chemical Safety and Hazard Investigation Board has opened an investigation into the incident that resulted in two fatalities and serious risks to other workers, stated Board Member Sylvia Johnson.
  • The investigation includes reviewing video footage and interviewing employees about the incident.
  • Pressure built up inside the valve, causing it to fail and release coke oven gas that exploded upon finding an ignition source.
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+13 Reposted by 13 other sources
Center

Gas valve failure during routine maintenance may have led to fatal blast at plant, US Steel says

Flushing of a gas valve made during maintenance preparation may have led to the deadly explosion at the U.S. Steel Clairton Coke plant.

·Kansas City, United States
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Associated Press NewsAssociated Press News
+10 Reposted by 10 other sources
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Gas valve failure during routine maintenance work may have led to fatal explosion, US Steel says

U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near Pittsburgh that left two dead, sent 10 to hospitals and damaged part of the sprawling facility.

·United States
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WTAE broke the news in Pittsburgh, United States on Friday, August 15, 2025.
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