قفل زنی و برچسب زنی - حادثه خط بخار
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Accident Examination 8 - High Pressure/Temperature Steam Release During Engine Room Repair - 1 Fatality
A shipyard worker was preparing to replace a high pressure steam valve that was faulty and leaking in an engine room. The valve was part of a 600 psi steam system on a vessel. Other shipyard personnel had previously located all the valves and drains and isolated the steam system according to the ship's as-built drawings. All the drains indicated on the as-built drawings of the ship were open and depressurized. The drains were then marked with tags. As one of the workers loosened the bolts around the faulty valve a tremendous burst of steam was suddenly released. The steam under high pressure, at 385 degrees Fahrenheit knocked the worker to the ground and produced third degree burns on more than 60 percent of his body. The worker died two days later in the hospital. Errors and omissions on the ship's as-built drawings had prevented shipyard personnel from completely isolating and dra