CSB Releases Update to Philadelphia Refinery Explosion

The United States Chemical Safety Board has released an update to the ongoing investigation into the June 21, 2019 explosion at the Philadelphia Refinery. In it, the CSB reports that 5,239 pounds of HF were released into the atmosphere, and that only a fraction was contained by the water curtain system designed to contain the release.

To see the full update, please click here.

Significant points in the update include:

  • A flammable process fluid containing HF was released and formed a ground-hugging cloud (see figure at right)
  • Estimates are that 5,239 pounds of HF was released during the incident.  Only 1,968 pounds were contained by the water curtain, leaving 3,271 pounds released to the atmosphere.