Lockout/Tagout (LOTO): The USA Standard for Controlling Hazardous Energy
Lockout/Tagout (LOTO) is one of OSHA's most critical safety standards. It protects workers from the unexpected energization, startup, or release of stored energy during service and maintenance of machinery and equipment. Failure to implement LOTO is consistently one of OSHA's most cited violations.
What Is Hazardous Energy?
Hazardous energy includes any energy source that could cause injury if unexpectedly released during maintenance or servicing. This includes:
- Electrical energy
- Hydraulic energy
- Pneumatic (compressed air) energy
- Mechanical energy (springs, gravity)
- Thermal energy (steam, hot surfaces)
- Chemical energy
The OSHA LOTO Standard
OSHA's Control of Hazardous Energy standard (29 CFR 1910.147) applies to general industry. Construction has similar requirements under 29 CFR 1926.417. The standard requires employers to:
- Develop a written energy control program
- Create machine-specific energy control procedures
- Provide LOTO equipment (locks, tags, hasps, lockout stations)
- Train authorized and affected employees
- Conduct annual inspections of energy control procedures
The LOTO Procedure: 6 Steps
- Notify: Inform all affected employees that equipment will be shut down
- Identify: Locate all energy sources for the equipment
- Isolate: Shut down and disconnect all energy sources
- Lockout/Tagout: Apply locks and/or tags to all energy isolation points
- Release stored energy: Bleed, block, or restrain all stored energy
- Verify: Test to confirm the equipment is de-energized before beginning work
Lockout vs. Tagout
Lockout (using a physical lock) is always preferred over tagout (using a warning tag only). Tagout alone is only acceptable when the equipment cannot be locked out. Tags are warnings only — they do not physically prevent re-energization.
Conclusion
LOTO compliance requires proper equipment and training. RANOVA USA carries lockout stations, padlocks, hasps, and tags to support your energy control program.
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