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Chpater 3 The permit system - Coggle Diagram
Chpater 3
The permit system
Permit to work (PTW) system
Non routine activities
HOT work
Cold work-non routine hazardous activities
Ground disturbance
Electrical work
Confined space entry
Critical lifts
Types of permit
HOT work permit
Cold work permit
Electrical permit
Confined space entry permit
Ground disturbance permit
LOTO permit
Radiation permit
Critical lift permit
Permit to work (PTW) system
Process technician
Inspects area and ensures housekeeping
Isolates
Clears equipment, vessel, thanks and piping
Tagout(LOTO)
Application of PTW
Electrical lsolation at substation
Electrical lsolation at the field
Equipment preparation at the field
Physical lsolation at the field
Approval of permit to work
Had-back after work
Example of petrochemical
Storage tank
Large pipee
Distillation towers
Underground cable ducts