Safety of energy isolation
The test validation procedure is a necessary step that cannot be omitted. In this case, the staff have not before the equipment is put into operation to complete the test of the function of the equipment, especially the emergency stop button on the mud pump function without testing, lead to drive motor wiring error is not found, field repair of the mud pump vice driller also does not have to test the button function, more didn't go to confirm the energy isolation is effective, the last nearly have casualties of the consequences.
The Lockout tagout procedure is the protective standard for dangerous energy control Lockout tagout (29 CFR 1910.147) issued by OSHA in 1989. The standard sets out the general industrial Lockout tagout requirements and requires authorized employees to confirm that isolation and power outages of the machine or equipment have been completed before starting work on the machine or equipment that has been locked or labeled. Studies have shown that the energy control program reduces the casualty rate by 25 to 50 percent. About 10% of all industrial accidents are due to improper control of hazardous energy. According to OSHA data, about 250,000 accidents are involved each year, of which 50,000 result in injuries and more than 100 are fatal.