Plant Management should define the situations where the permit-to-work is to be used, including where:
Management deems it necessary for a given task on the basis of prior risk assessment This could be because a given task is complex and any error could have significant adverse consequences.
The work is to done by people not under the direct supervision of the person in charge of the operating unit.
There is a mandatory requirement for special permits. These situations would also require compliance with additional precautions.
Entry to a confined space
Hot Work
Line breaking with hazardous substances or under pressure.(hot Tapping)
Work involving electrical equipment (LO/TO)
Entry into a Restricted Area
There is an impact on another group’s activities, (i.e. On-line process equipment more than one group working with the same set of Lockouts/Tagouts).
Permits-to-Work should be:
A standardized procedure for an entire given site.
Verification that all check listed items have been accounted for and documented.
Acceptance by the executing authority of responsibility for conditions listed in the permit