20 Lockout Tagout

MODULE 20

Lockout/Tagout

1910.147(a)(1) Scope
 Covers servicing and maintenance of machines and equipment in which
 Unexpected energization or start up or
 Release of stored energy could cause
 Injury to employees

 Normal operation is covered in 1910
Subpart O
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1910.147(a)(1)(ii) Exemptions
 Construction, agriculture and maritime employment;  Electrical Utilities;
 Electrical equipment (covered by
Subpart S)
 Oil and gas well drilling and servicing
 So why comply?
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Control of Hazardous Energy
 Why use lockout/tagout?
 Protects maintenance personnel from power being reapplied by mistake
 Recommended by API RP 54 for electrical systems in drilling and servicing operations
 Recognized hazard
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1910.147(a)(2) Application
 Service and maintenance:
 Employee required to remove or bypass a guard or safety device
 Employee required to place part of body into area that would be a danger zone during machine operation cycle

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1910.147(a)(2) Application
 Exception: Minor adjustments and servicing activities during normal production if
 Routine
 Repetitive
 Integral to production

 Provided that alternative measures provide effective protection
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1910.147(a)(2) Application
 Does not apply to cord and plug connected equipment for which
 Exposure to hazard is controlled by unplugging and
 Plug under exclusive control of employee performing service or maintenance

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1910.147(a)(2) Application
 Does not apply to hot tap operations in transmission and distribution operations in pressurized pipelines provided that:
 Continuity of service is essential,
 Shutdown of system is impractical, and
 Documented procedures and special equipment provide proven effective protection for employees
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1910.147(a)(3) Purpose
 Establish a program and utilize procedures for affixing appropriate lockout devices or tagout devices to energy isolating devices
 Prevent