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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41 Articles

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.
Gas valve failure during maintenance work may have led to fatal explosion: US Steel
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
‘It Didn’t Have to Be This Way’: After Another Explosion at Clairton Coke Works, Advocates Call for Accountability - Inside Climate News
The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.By Kiley BenseIn the aftermath of an explosion at U.S. Steel’s Clairton Coke Works that injured 20 workers in July 2010, the Allegheny County emergency management chief was grateful it hadn’t been worse. “By the grace of God, nobody’s dead,” Robert A. Full said. “It’s a miracle no one was killed.”
Deadly blast at US Steel plant highlights need to clean up the…
Qiyam Ansari was driving to work the morning of Aug. 11 when he felt and saw an explosion occur just down the road in Clairton, Pennsylvania. Thick black smoke burst from the U.S. Steel facility along the Monongahela River, filling the air with an acrid stench, and the ground began shuddering from a series of blasts.…
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