Valero Closes Texas Refinery Following Explosion: Sources

• The explosion occurred in the 47,000-bpd unit 243 diesel hydrotreater, with no reopening date set for the facility, which is Valero's largest refinery
• The refinery lost water supply and steam during firefighting efforts, necessitating a complete shutdown to extinguish the blaze
• Port Arthur officials issued a temporary shelter-in-place order for residents on the west side of the city, which was lifted by 6 a.m. CDT

Summary: Valero Closes Texas Refinery Following Explosion

Key Event: Valero Energy Corp completed a temporary shutdown of its Port Arthur, Texas refinery on Tuesday, March 24, following a Monday night explosion and fire in a diesel hydrotreater unit. The facility processes 380,000 barrels per day, making it Valero's largest refinery.

Critical Details:

• The explosion occurred in unit 243, a 47,000-bpd diesel hydrotreater
• No injuries reported from the incident
• Blast audible from 11 miles away
• No reopening date has been set
• Jefferson County Sheriff's office confirmed the incident was not believed to be a deliberate act

Operational Impact:

The complete refinery shutdown was deemed necessary to extinguish the fire, as the facility lost water supply and steam during firefighting efforts. Port Arthur city officials issued a shelter-in-place order for west side residents, which was lifted by 6 a.m. CDT (1100 GMT).

Market Context:

The incident comes as oil, gasoline, and diesel prices have been climbing amid ongoing geopolitical tensions. The closure of a 380,000-bpd refinery represents significant capacity offline in the U.S. Gulf Coast refining system.

Technical Background:

Diesel hydrotreaters use hydrogen to remove sulfur from motor fuels to comply with U.S. environmental regulations. The Port Arthur refinery is located 86 miles east of Houston.

Market Implications:

The temporary shutdown of such a large refinery could put additional upward pressure on refined product prices, particularly diesel, at a time when energy markets are already experiencing volatility due to geopolitical factors.