Lockout Tagout (LOTO) is a safety procedure used to isolate hazardous energy sources and prevent machines or equipment from being accidentally started during maintenance or servicing. It involves using physical lockout devices, such as safety padlocks lockout tagout, to secure energy isolation points. LOTO ensures that only authorized personnel can restore power, protecting workers from injuries caused by unexpected equipment activation.

The purpose of Lockout Tagout is to protect workers from hazardous energy, including electrical, mechanical, hydraulic, and pneumatic sources, during maintenance operations. By physically locking energy isolation points and clearly identifying them with warning tags, LOTO prevents accidental startup or energy release. This significantly reduces workplace injuries and ensures compliance with industrial safety standards.

Lockout Tagout is used during equipment maintenance, repair, cleaning, or inspection when there is a risk of unexpected energization. It is widely applied in industries such as manufacturing, oil & gas, power generation, and chemical processing. LOTO systems typically include safety padlocks, lockout hasps, valve lockouts, and electrical lockout devices to secure different types of energy sources.

The standard Lockout Tagout procedure typically includes six steps: preparation, shutdown, isolation, lockout/tagout application, verification, and maintenance. Workers first identify all energy sources, safely shut down equipment, isolate energy, and apply lockout devices such as safety padlocks. Before starting work, they verify complete isolation to ensure the equipment cannot be energized.

The correct Lockout Tagout procedure requires identifying all hazardous energy sources, shutting down equipment properly, isolating energy points, and applying lockout devices with personal safety padlocks. Each worker must apply their own lock to ensure full control. The system must then be tested to confirm zero energy before maintenance begins, ensuring maximum safety and compliance.

The final step in a Lockout Tagout process is the safe removal of lockout devices and restoration of equipment to normal operation. This includes verifying that all tools are removed, guards are reinstalled, and all personnel are safely clear. Only authorized employees who applied the locks should remove them, ensuring controlled and safe re-energization.

The OSHA Lockout Tagout standard is a regulation that requires employers to control hazardous energy during equipment servicing and maintenance. It mandates the use of lockout devices, proper procedures, employee training, and periodic inspections. This standard ensures that workers are protected from accidental machine startup or energy release in industrial environments.

OSHA 1910.147 is the official U.S. regulation that governs the control of hazardous energy, commonly known as the Lockout Tagout standard. It outlines specific requirements for isolating energy sources, using safety padlocks and tags, and training employees. Compliance with OSHA 1910.147 is essential for maintaining workplace safety and avoiding regulatory penalties.

Lockout Tagout requirements in the United States are regulated by the Occupational Safety and Health Administration (OSHA). OSHA establishes safety standards that employers must follow to protect workers. In other regions, similar regulations may be enforced by local safety authorities, but OSHA standards are widely recognized as a global benchmark for LOTO safety practices.

Lockout Tagout responsibility is shared between employers, authorized employees, and affected workers. Employers must provide proper procedures, training, and equipment, while authorized employees apply lockout devices and perform maintenance safely. Affected employees must understand LOTO procedures and avoid interfering with locked equipment.

LOTO training is required for three types of employees: authorized employees who perform lockout procedures, affected employees who work near locked equipment, and other employees who may be exposed to hazards. Training ensures that all personnel understand their roles and follow proper safety practices during maintenance operations.

A lockout device can only be removed by the authorized employee who applied it. This ensures full accountability and prevents accidental equipment startup. In exceptional cases, employers may establish strict procedures for removal, but safety protocols must always verify that all workers are clear before re-energizing equipment.