Take any of the following steps below that may be necessary to guard against stored energy(s) left in the equipment after it has been shut down and isolated from its energy source(s).
- Inspect the equipment to make sure ALL parts have STOPPED moving
- Install ground wires
- Relieve trapped pressure
- Release the tension on springs, or block the movement of spring-driven parts
- Block or brace parts that could fall because of gravity
- Block parts in hydraulic and pneumatic systems that could move from the loss of pressure
- Bleed the lines and leave vent valves open ( ensure that vents discharge to a SAFE location and are CLEARLY identified to workers in the area)
- Drain process piping systems and close valves to prevent the flow of hazardous material
- If a line must be blocked where there is no valve, use a blank flange
- Purge reactor tanks and process lines
- Dissipate extreme cold or heat, or provide protective clothing
If stored energy can re-accumulate, monitor it to make sure it stays below hazardous levels.