Lockout vs. tagout

Lockout and tagout are the two methods for controlling hazardous energy and lockout is preferable because it is more secure. Locks provide a physical restraint and cannot be removed without a key, while tags can be removed or ignored by someone who is unaware of what they mean.

OSHA prefers lockout and says tags can only be used in two situations: when locks cannot be used and when the employer can demonstrate that a tagout system will provide full employee protection. Additional safeguards can be implemented for tag outs, such as blocking a control switch or removing valve handles to reduce the possibility of accidentally starting equipment.

When the tagout procedure is used, workers must understand the limitations of the tags:

* Tags are only warning devices, they do not provide physical restraints, like locks.
* It is easier to bypass or ignore a tag or remove it without authorization.
* Tags may not be effective unless they can be read and understood by all affected workers.
* Tags can fall or be knocked off unless they are securely attached.