U.S. Department of Labor
Process: Hazardous Energy
Make a list and check it twice.
Your life depends on it!
- Identify and deenergize all energy sources:
- Disconnect or shut down machinery, equipment, or systems
- Deenergize electrical circuits
- Block fluid (gas or liquid) flow in hydraulic or pneumatic systems
- Block machine parts from movement
- Block or dissipate all stored or potential energy:
- Discharge capacitors
- Release or block springs that are under compression or tension
- Vent fluids from pressure vessels, tanks, or accumulators, but never vent toxic, flammable, or explosive substances directly into the atmosphere
- Apply lockout or tags-plus systems to all energy sources, including electrical breaker panels, control valves, etc.
- Test to verify the deenergization of the machinery, equipment, or system, and the isolation of all energy sources.
- Notify other authorized and affected employees that the lockout/tags-plus systems will be removed.
- Remove all nonessential items and ensure that the machinery, equipment, or system components are operationally intact.
- Ensure that all employees in the work area are clear of danger points or safely removed before re-energizing the machinery, equipment, or system.
- Inspect repair work before removing lockout or tags-plus systems and activating the machinery, equipment, or system.
- Only remove your assigned lockout or tags-plus application.