The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just ...

U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was ...

Production at the facility could be affected for some time. Two of the plants six batteries of ovens were damaged in the ...

The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

“Pressure built inside the valve, leading to valve failure and coke oven gas filling the area and ultimately exploding when ...