An old, degraded piece of metal pipe that had not been tested for corrosion led ...
NEW YORK - An old, degraded piece of metal pipe that had not been tested for corrosion led to a June fire and explosions at the Philadelphia Energy Solutions oil refinery, the U.S. Chemical Safety and Hazard Investigation Board said on Wednesday.
That led to three separate explosions that hurled pieces of the refinery across the nearby Schuylkill River and onto highways, causing a blaze that was visible for miles, and destroying an alkylation unit that uses HF to produce components of high-octane gasoline. A process operator at the plant quickly activated a fail-safe that dumped a large quantity of HF into a protected vessel so that more of the acid was not released, CSB said.
The ruptured pipe fitting, known as an elbow, was also found to have a metal composition that included high levels of copper and nickel, failing to meet industry standards, the agency said.
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