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Control of Hazardous Energy:
Follow Lockout/Tagout Practices

The unexpected release of stored energy (electrical, mechanical, hydraulic, pneumatic, chemical, thermal or other sources) in machines and equipment can result in injury or death. Employees who service or maintain machinery and other equipment are at the greatest risk from the unexpected release of hazardous energy, such as a steam valve being turned on while a worker is repairing a connection in the piping. Injuries may include electrocution, burns, crushing, laceration, or more serious injuries.

Be sure to follow all OSHA lockout/tagout guidelines to prevent accidental stored energy releases while employees are engaging or otherwise working with the machinery.

Compliance with lockout/tagout standards prevents an estimated 120 fatalities and 50,000 injuries each year.

OSHA requirements are set by statute, standards and regulations.
The 1910.147 OSHA Standard requires control of the release of stored energy via lockout/tagout where the energy isolating device is not capable of being locked out.

OSHA Control of Hazardous Energy Standards

Control of hazardous energy is addressed in specific OSHA standards for general industry, maritime, and construction. This section highlights OSHA standards and documents related to control of hazardous energy (lockout/tagout).

General Industry (29 CFR 1910)
Related Information

1910 Subpart J - General Environmental Controls

1910.147, The control of hazardous energy (lockout/tagout).

Related Information

1910 Subpart R - Special Industries

1910.261, Pulp, paper, and paperboard mills.

Related Information

1910.269, Electric Power Generation, Transmission, and Distribution.

Related Information

1910 Subpart S - Electrical

1910.306, Specific purpose equipment and installations.

Related Information

1910.333, Selection and use of work practices.

Related Information
Maritime (29 CFR 1915, 1917, 1918)
Related Information

1917 Subpart C - Cargo Handling Gear and Equipment

1917.48, Conveyors.

Related Information

1918 Subpart G

1918.64, Powered conveyors.

Related Information
Construction (29 CFR 1926)
Related Information

1926 Subpart D

1926.64, Process safety management of highly hazardous chemicals. For requirements as they pertain to construction work, follow the requirements in 29 CFR 1910.119.

Related Information

1926 Subpart K - Electrical

1926.417, Lockout and tagging of circuits.

Related Information

1926 Subpart Q

1926.702, Requirements for equipment and tools.

Related Information

State Standards

There are 28 OSHA-approved State Plans, operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.

Other State Standards and Guidance
Lockout/Tagout (LOTO) (Control of Hazardous Energy). Washington State Department of Labor & Industries. Landing page for LOTO resources.
Lockout/Tagout – Oregon OSHA’s guide to controlling hazardous energy. Oregon OSHA Publication 440-3326 (May 2015). This guide is based on the requirements in Oregon OSHA's standard for hazardous energy control - Subdivision 2/J, 1910.147. Lockout and tagout are the primary methods of controlling hazardous energy.
Sample Written Program for Control of Hazardous Energy (Lockout/Tagout). Texas Department of Insurance. Sample lockout/tagout program provided as a guide to assist employers and employees in complying with the requirements of 29 CFR 1910.147, as well as to provide other helpful information. It is not intended to supersede the requirements of the standard.
Control of Hazardous Energy (Lockout/Tagout) --- 29 CFR 1910.147 - Sample Program. Maine Department of Labor. Sample hazardous energy control program provided by SafetyWorks! as a guide to help employers implement OSHA's Control of Hazardous Energy (Lockout/Tagout) standard (29 CFR 1910.147) in their workplace.

Additional OSHA Lockout/Tagout Information
OSHA Lockout/Tagout Concepts
OSHA Lockout/Tagout Program

OSHA Publication 3120: Control of Hazardous Energy, Lockout/Tagout
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