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Control of Hazardous Energy: Lockout/Tagout

This document discusses lockout/tagout procedures to protect workers from hazardous energy sources. It defines energy sources like electrical, mechanical, pressurized water/steam, and others. Problems from hazardous energy include accidental start-ups, electrical shock, and release of stored or residual energy. Lockout uses locks to physically hold energy control points like switches or valves to prevent energy release, while tagouts use warning tags but do not physically prevent energy release. The 8 steps of the energy control procedure, including preparing for shutdown, isolating energy sources, applying locks and tags, verifying isolation, performing tasks, and releasing from lockout are then outlined.

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32 views18 pages

Control of Hazardous Energy: Lockout/Tagout

This document discusses lockout/tagout procedures to protect workers from hazardous energy sources. It defines energy sources like electrical, mechanical, pressurized water/steam, and others. Problems from hazardous energy include accidental start-ups, electrical shock, and release of stored or residual energy. Lockout uses locks to physically hold energy control points like switches or valves to prevent energy release, while tagouts use warning tags but do not physically prevent energy release. The 8 steps of the energy control procedure, including preparing for shutdown, isolating energy sources, applying locks and tags, verifying isolation, performing tasks, and releasing from lockout are then outlined.

Uploaded by

engg
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Control of Hazardous Energy

Lockout/Tagout
Why bother with
lockout/tagout?

Lockout and tagout procedures are


designed and implemented to protect
you from an accidental release of
energy.

2
What is an “energy source?”
Energy sources include:
 Electrical  Thermal
 Mechanical
 Pressurized water
 Pneumatic or steam
 Hydraulic
 Gravity
 Chemical

3
Hazardous Energy

Problems associated with hazardous


energy include:
 Accidental start-ups
 Electrical shock
 Release of stored or residual energy

4
What is the difference
between lockout and tagout?
Lockout – a padlock and locking
device are used to physically “hold” an
energy control point, such as a switch,
lever or valve handle. This makes it
impossible for energy to be released.
5
What is the difference
between lockout and tagout?
Tagout – a written warning that tells
operators not to operate a switch,
lever or valve that could release
hazardous energy. Tagouts DO NOT
physically prevent someone from
releasing potentially hazardous
energy. 6
Examples of Tags

7
Application of the Energy
Control Procedure (Lockout)
1. Prepare for shutdown
2. Shut down equipment
3. Isolate all energy sources
4. Apply locks & tags
5. Release stored energy
6. Verify equipment isolation
7. Perform the task
8. Release from Lockout

8
Multiple Lockout

9
Group Lock

10
Step 1: Prepare for Shutdown

• Understand equipment hazards


• Notify other workers of shutdown

11
Step 2: Shut down equipment

• Use the normal shutdown procedures


• Turn all switches to OFF/Neutral

12
Step 3: Isolate all Energy
Sources
 Use energy isolation
devices in accordance with
established procedures to
prevent transmission or
release of energy

13
Step 4: Apply Locks & Tags

Apply locks and tags to:


• Valves
• Breakers/electrical
disconnects
• Mechanical blocks
Valve lockout device

14
Step 5: Release or Block
all Stored Energy
• Discharge capacitors • Drain fluids
• Block/disconnect lines • Vent gases
• Block or release springs • Allow system to cool (or
• Block elevated parts use PPE)
• Relieve system pressure • Apply any additional
locks and tags needed

15
Step 6: Verify Equipment
Isolation
• Check that other workers are
clear of potential hazards
• Check that locking devices
are secure
• Attempt normal startup
• Return control to
OFF/Neutral
Controls to verify
energy isolation

16
Step 7: Perform the Task

 Perform maintenance or
service

17
Step 8: Release from Lockout

 Ensure machinery is properly assembled


and all tools removed
 Ensure that employees are outside of danger
zones and are notified that devices are being
removed
 Remove LOTO devices
– Must be removed by authorized
employee who applied it
18

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