CSB Safety Video: Fire in Baton Rouge

Updated Video Details the 2016 Incident, its Root Causes, and Key Lessons

U.S. Chemical Safety Board, October 16, 2017

Video Description

The U.S. Chemical Safety Board (CSB) has released a new 8-minute safety video describing the events leading to the November 22, 2016 fire at ExxonMobil's Baton Rouge refinery, which severely burned four workers. The video, entitled "Fire in Baton Rouge," details the CSB's Key Lessons stemming from the 2016 incident.

The fire erupted in the refinery’s sulfuric acid alkylation unit when operators inadvertently removed bolts that secured a piece of pressure-containing equipment to a type of valve known as a plug valve. When the operators then attempted to open the valve, it came apart and released flammable isobutane, which formed a vapor cloud that quickly ignited.

In the video Chairperson Vanessa Allen Sutherland said, “During our investigation, the CSB learned that the operators attempting to open the plug valve were following accepted practices within the refinery. Our safety bulletin addresses the need for companies to be vigilant with their safety hazard and risk mitigation analyses.  The management of safety is critical to the protection and safety of workers and integrity of facility operations.

The CSB is issuing Key Lessons to address the shortcomings revealed by the investigation: 

  1. Evaluate human factors - interactions among humans and other elements of a system - associated with operational difficulties that exist at a facility in relation to machinery and other equipment, especially when the equipment is part of a process covered by the Occupational Safety and Health Administration’s Process Safety Management (PSM) standard. Apply the hierarchy of controls - a method of evaluating safeguards to provide effective risk reduction -  to mitigate the identified hazards.
  2. Establish detailed and accurate procedures for workers performing potentially hazardous work, including job tasks such as removing an inoperable gearbox.
  3. Provide training to ensure workers can perform all anticipated job tasks safely. This training should include a focus on processes and equipment to improve hazard awareness and help prevent chemical incidents.

Chairperson Sutherland said, “The safety management practices outlined in our bulletin could have prevented the fire in Baton Rouge.  We urge companies to share and implement our key safety lessons at their facilities in order to prevent future injuries and property damage.

About the Chemical Safety Board

The CSB is an independent federal agency charged with investigating serious chemical accidents. CSB investigations examine all aspects of chemical accidents, including physical causes such as equipment failure as well as inadequacies in regulations, industry standards, and safety management systems. The Board does not issue citations or fines but makes safety recommendations to companies, industry organizations, labor groups, and regulatory agencies such as OSHA and EPA.

For more information, please visit or contact Communications Manager Hillary Cohen at or by phone at 202.446.8094.

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