Abstract: At approximately 7:20 a.m. on April 3, 2017, Employees #1 and #2 were starting up the steam generator for manufacturing of corrugated boxes. The bottom of the semi-closed receiver (SCR) catastrophically failed at approximately 100 psi causing the approximately 338 degree Fahrenheit water to flash over to steam. The SCR rocketed out of the facility as a result of the explosion killing Employee #1 and critically injuring Employee #2. Employee #1 was killed from the explosive blast trauma and Employee #2 received fractures to his legs and face when the boiler room walls collapsed onto him. The SCR travelled approximately 510 feet and crashed through the roof of Faultless Healthcare Linen killing three employees at that establishment.