Hazard warning label
Hazard warning label design should be clearly different from other labels; The warning expression should include standardized terms (such as "danger, do not operate" or "Danger, do not remove without authorization"); The hazard warning label should indicate the employee's name, date, place and reason for locking. Danger warning labels can not be altered, disposable, and meet the requirements of locking environment and time limit; After use, labels should be destroyed in a centralized manner to avoid misuse.

Hazard warning labels shall not be used for any purpose other than to specify Lockout tagout isolation points for controlling hazardous energy and materials.
If a spare key is kept, the control standard for the spare key should be established. In principle, the spare key can only be used when unlocking the lock abnormally. At any other time, no one should have access to the spare key except the keeper of the spare key.

The selection of locking facilities should not only meet the locking requirements, but also meet the safety requirements of the operation site.