U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was being flushed ahead of maintenance work. U.S. Steel says its preliminary ...
Flushing of a gas valve made during maintenance preparation may have led to the deadly explosion at the U.S. Steel Clairton Coke plant. U.S. Steel released information on their preliminary ...
Valve pressure buildup likely caused Pennsylvania plant blast: US Steel U.S. Steel says its preliminary investigation found that the blast happened after pressure built up while a gas valve was being ...