Lockout/Tagout, combined with tryout, is a technique used to prevent hazardous energy from being released during the servicing of equipment. It works by placing locks and energy-isolation devices before work begins, with the goal of reaching a zero-energy state.
What Are the Types of Hazardous Energy?
Hazardous energy comes in many forms, and LOTO addresses each one.
- Electrical
- Chemical
- Pneumatic
- Radiation
- Hydraulic
- Steam
- Mechanical
- Spring-driven
- Thermal
- Gravity
What Are the Basics of Lockout/Tagout?
Lockout and tagout always work together.
- Lockout and tagout must be used together
- Each isolation point must have both a lock and a tag
- Locks must be standardized and used only for LOTO
- LOTO locks must have only one key
- The key must stay in the possession of the person who installed the lock
- LOTO locks and tags are for personal protection only, not for operational controls
What Must Be on a Lockout Tag?
Every tag has to make the lockout clear and accountable.
- The name of the authorized employee who applied the lockout device
- The date the tag was applied
- The reason for the lockout, briefly describing why the equipment is locked out
- Prominent warnings such as “Do Not Operate” or “Danger”
What Is the Goal of Lockout/Tagout?
The goal of LOTO is to achieve a zero-energy state and remove both sources of energy.