Lockout/Tagout procedures apply in the following circumstances:
- While servicing or maintaining equipment, when unexpected startup of the machine or release of stored energy could occur
- During normal production when workers must remove or bypass a guard or safety device
- During normal production when workers place any part of their body into the danger zone or near the machine’s point of operation
- During all set up activities
NIOSH recommends that workers follow the regulations contained in their employer’s hazardous energy control program and complete all employer-provided training on hazardous energy control procedures.
Before beginning machine adjustment, maintenance, or servicing work, always do the following:
1. De-energize all sources of hazardous energy:
- Disconnect or shut down engines or motors.
- De-energize electrical circuits.
- Block fluid (gas or liquid) flow in hydraulic or pneumatic systems.
- Block machine parts against motion.
2. Lockout and tagout all forms of hazardous energy, including electrical breaker panels and control valves.
3. Block or dissipate stored 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.
- Make sure that only one key exists for each of your assigned locks and that only you hold that key.
- Verify by test and/or observation that all energy sources are de-energized.
- Inspect repair work before removing your lock and activating the equipment.
- Make sure that only you remove your assigned lock.
- Make sure all workers are clear of danger points before re-energizing the system.
Lockout / Tagout Resources:
- Review Title 29 Code of Federal Regulations (CFR) Part 1910.147 here.
- Visit the OSHA LOTO Tutorial page.
- Visit the main OSHA LOTO site.
- Read our post on Key Components of a Lockout / Tagout Program.
- Select LOTO and Safety Tags at ComplianceSigns.com.