One idea I've proposed is to place a large hot orange/hot pink tag on the decommissioned equipment so that personnel will recognize its status. Even the occasional auditor or inspector may even declare it as a "Good Practice."
In the November 2014 issue of Control Engineering magazine J. B. Titus wrote a short but useful article about the "12 hazards of unused machinery." (Page 24)
J. B. notes the following:
"Even though a machine may no longer be active in the production process, this does not mean that the machine has been rendered hazard free..."
J. B. continues to observe that a decommissioned machine may pose one or more of the following hazards:
- Live electrical connections
- Compressed gases or fluids
- Charged tie rods
- Compressed springs
- Hazardous materials
- Flammable or combustible material
- Abandoned conduit as a route for hazardous vapors
- Blocking emergency access
- Other machine, application, or environmental considerations
I heartily agree with JP and wished I had his article handy during my previous inspections where I've highlighted concerns about decommissioned equipment and the hazards posed. The plant or factory management needs to recognize the risks with these "turned off pieces of equipment" and mitigation actions taken.
Thanks to J. P. Titus for the brief article and thanks for giving more support for my arguements that decommissioned equipment is not a trivial issue.