At the end of this module, you will be able to:
- Define lockout/tagout
- Describe primary and secondary energy sources
- Differentiate between an "authorized" and "affected" employee
- Describe the lockout and tagout process
- Describe the procedure for restarting affected equipment
The following key questions are answered in this module:
What is lockout/tagout?
Lockout/tagout refers to specific practices and procedures to safeguard all workers from the unexpected startup of machinery and equipment or the release of hazardous energy during service or maintenance activities.Lockout/tagout can be defined as the placement of a lock or tag on an energy isolating device, in accordance with an established procedure, ensuring that the energy isolating device and the equipment being controlled cannot be re- energized until the locking device is removed.
What are primary energy sources to be isolated during lockout/tagout?
Primary energy sources include electricity, hydraulics (fluids), and pneumatics (air or vacuum energy).
What are secondary (or stored) energy sources to be isolated during lockout/tagout?
Secondary energy sources include springs, capacitors, accumulators, counterbalance systems, gravity, and inertia.
What is an authorized person or employee?
An authorized person is the one who performs the lockout. This is someone who is familiar with the equipment in question and capable of locking it out properly.
What is an affected employee?
An"affected employee" is an employee that is affected by the lockout. This commonly includes machine operators who need to know that their machine should not be operated.
What are six steps to an effective energy control program?
Six steps to an effective energy control program include preparation, shut down, isolation, lockout/tagout, stored enegy check, and isolation verification.
What types of hardware are used to lockout machinery?
Locks and hasps are used to lockout machinery for energy control.
Below is a transcript of the video sample provided for this module:
Industrial equipment and machinery is typically large and complex. When this equipment is shutdown to be serviced, maintained, or repaired there are typically multiple people from different trades involved. It is imperative to everyone involved that the equipment be stopped and remain still while the work is being performed. Lockout/Tagout refers to specific practices and procedures to safeguard all workers from the unexpected startup of machinery and equipment or the release of hazardous energy during service or maintenance activities. This module will define the need for these procedures and the general form they take. The details of implementation may vary from site to site but there are general guidelines which must be followed.
Use the additional resources and links below to learn more about this topic:
- U.S. Department of Labor’s Occupational Safety & Health Administration (OSHA) – www.osha.gov
- OSHA Control of Hazardous Energy – www.osha.gov/SLTC/controlhazardousenergy/
- OSHA Fact Sheet - http://www.osha.gov/OshDoc/data_General_Facts/factsheet-lockout-tagout.pdf
- OSHA Typical Minimal Lockout Procedures CFR 1910.147 App A - http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9805&p_table=STANDARDS
- National Institute for Occupational Safety and Health (NIOSH) – www.cdc.gov/niosh/
- NIOSH Publications - http://www.cdc.gov/niosh/docs/2004-101/chklists/r1n44l~1.htm