Abstract: Plant employees had just completed bagging compost products and the bagging line was shut down to refill material dispensing bins. Employee #1, the office manager, came into the plant to collect time cards. While he and a coworker were standing inside a doorway conversing, a non-ASME code air receiver ruptured; its south end plate flew off in an upward trajectory. The plate struck Employee #1's head, nearly severing the skull and removing part of the brain. The plate continued on, striking and breaking a roof joist. The coworker was impacted by Employee #1's propelled body and knocked into the building wall; he was apparently uninjured although he later complained of a sore back and psychological problems.