Incident date: 2018-07-04
NAICS industry code: 325120

Two employees were removing a valve from a 4-inch hydrogen line in a sulfur unit. One employee was loosening the bottom bolts of the flange. As the flange was opened, hydrogen escaped and caused a flash fire that burned the two employees. The employees suffered second degree burns on the ears, right wrist, right arm, back of the neck, and the back. One employee was hospitalized.

Hazard classification:
code_event: title: Ignition of vapors, gases, or liquids
code_source: title: Hydrogen
code_nature: title: Second degree heat (thermal) burns
code_body: title: Multiple body parts, n.e.c.
severity: moderate