Petrochemical companies Lockout Tagout

There are dangerous materials and dangerous energy (such as electric energy, pressure energy, mechanical energy, etc.) that may be accidentally released in the production equipment of petrochemical enterprises. If the energy isolation is improperly locked in the process of inspection and maintenance and the start-up and shutdown of the equipment, accidents (events) may occur due to the accidental release of dangerous materials and energy.

A certain company olefins department "5.29" explosion accident company olefins department 7 # cracking furnace feed line valve is fully open, guaranteed delivery personnel apart to turn blind flange plate, in the case of blind plate replacement has not been completed, the operator to open the inlet valve, the world of light naphtha to 1.3 MPa pressure light naphtha from has not closed the flange of the leak, A large number of gasified oil and gas encountered open fire in the furnace, or flash explosion occurred in the high temperature heat source, and then caused fire, resulting in 1 death, 5 serious injuries, 8 minor injuries.
In this accident, there is no effective isolation control for dangerous materials in the process of device start and stop.

Fire and explosion accident of butadiene rubber device in a company on March 15

The off-duty operator of a petrochemical company took the risk of disconnecting the instrument flange connected to the valve to clean up the plug without completely closing the valve of the gas phase pressure point of the far-transfer liquid level meter in the alkali washing tower, resulting in a large number of material leakage in the tower, and the material spewing out rapidly diffused to form explosive gas. Flashover occurred after the non-explosion-proof air conditioning unit hanging on the north wall of the substation on the south side of the condensing unit, and then caused explosion and combustion near the sewage pool and the pump room on the west side of the alkali washing tower, resulting in 1 death and 5 injuries. ✍ in this accident, there is no effective identification, isolation and control for dangerous materials and energy in the device pipeline, thus illegal and risky operation.