January 17, 2026
In industrial workplaces, ensuring employee safety during equipment maintenance is crucial. One of the most effective ways to prevent accidents is through Lockout/Tagout (LOTO) procedures. Among the key elements of LOTO are lockout safety signs and labels, which communicate critical information about equipment status and help prevent unexpected startup.
In this guide, we’ll explore everything you need to know about lockout safety signs and labels—including their types, importance, selection criteria, and best practices for use. By the end, you’ll understand how to enhance workplace safety and comply with OSHA and ANSI standards.
Lockout safety signs are visual warnings placed on machinery or control panels to indicate that the equipment is under maintenance and should not be operated. These signs are typically used in areas where equipment poses a high risk if accidentally started.
Common examples include:
“Do Not Operate”
“Equipment Locked Out”
“Authorized Personnel Only”
Lockout labels or tags provide more detailed information about the lockout. They usually indicate:
The name of the person performing the lockout
The date and time of lockout
The reason for lockout
Tags can be single-use or reusable, depending on the workplace needs.
While both serve to prevent accidents, signs are more general warnings, visible from a distance, whereas labels and tags provide specific, actionable details. A combination of both ensures maximum clarity and compliance.
Accidental equipment activation is one of the leading causes of workplace injuries in industrial settings. Lockout safety signs and labels clearly communicate that machines are off-limits, significantly reducing the risk of accidents.
OSHA requires clear identification of locked-out equipment as part of a compliant LOTO program. Using proper signs and labels helps workplaces meet OSHA, ANSI, and ISO standards, avoiding fines and legal liabilities.
Visual warnings serve as constant reminders to employees about ongoing maintenance or hazards. This not only protects workers but also fosters a culture of safety throughout the facility.
These are typically mounted near equipment control points and provide immediate visual warnings. Examples include:
Do Not Operate signs
Equipment Locked Out warnings
Tags or labels can be filled in with specific information, such as the technician’s name or the reason for lockout. They can be temporary single-use tags or durable reusable labels.
Some labels are color-coded to indicate different risk levels:
Red: Danger
Yellow/Orange: Caution or Warning
This helps employees quickly assess the level of hazard before approaching equipment.
For workplaces with specific needs, custom labels and signs are available. These can include:
Multi-language text
Company logos
Custom sizes and materials
The durability of lockout signs and labels is essential, especially in harsh industrial environments. Common materials include:
PVC or Vinyl: Lightweight and flexible
Aluminum or Metal: Highly durable and long-lasting
Special coatings: For oil, chemical, or UV resistance
Ensure the font size, color contrast, and graphics are clearly visible from a distance. Labels should remain legible even after exposure to wear, sunlight, or chemicals.
Always select signs and labels that meet OSHA requirements, ANSI Z535 standards, or ISO safety symbols to ensure compliance and effectiveness.
Place signs at key points: control panels, power sources, and equipment access points.
Combine with lockout devices: padlocks, lockout hasps, and other LOTO tools.
Regular inspection and replacement: replace faded or damaged signs to maintain clarity.
Train employees: ensure everyone understands the meaning and importance of the signs and tags.
Only using locks without visible tags
Using old or faded labels that are hard to read
Inconsistent signage that causes confusion
Lockout safety signs and labels are crucial in industries where machinery poses a hazard:
Manufacturing: assembly lines, heavy machinery
Energy & Utilities: electrical substations, power plants
Oil & Gas: refineries, drilling equipment
Chemical Plants: hazardous material handling
Food Processing: conveyor systems, automated machinery
Q: Are lockout safety labels required by OSHA?
A: Yes, OSHA mandates clear identification of locked-out equipment as part of LOTO compliance.
Q: What materials are best for lockout safety labels?
A: Durable materials such as vinyl, polyester, and aluminum are recommended for industrial environments.
Q: Can I customize lockout signs?
A: Yes, many suppliers offer multi-language and company-branded options.
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