A permit to work (PTW) system is a process to keep employees safe during hazardous and nonstandard operations. It involves assessing the risks, establishing a proper safety protocol based on the risks, and proper communication throughout the entire process.
Definition
A PTW is a documented process to control hazardous tasks, confirming all necessary precautions are taken.
Example: PTW is issued before maintenance on a gas pipeline.
Contents of a Permit to Work
Job Description: Details of the task.
Example: Installation of a pressure relief valve.
Hazard Identification: Summary of risks.
Example: Risk of high-pressure gas exposure.
Precautions Required: Safety measures to implement.
Example: Mandatory PPE, rescue equipment, gas testing and energy isolation measures.
Signatures: Approval from the issuer and acknowledgement from the worker. Example: Signed by Site Supervisor and Technician.
When to Use a Permit to Work
The permit to work is used for non-routine activities, not limited to:
Hot Work: For welding or cutting tasks.
Cold Work: non-heat-generating tasks with high risks.
Chemical Work: Handling hazardous substances.
Confined Space Entry: Tasks in limited access areas.
Lifting Operations: Heavy lifting tasks involving cranes or hoists.
Work at Heights: Activities conducted above ground level ( 4 feet – OSHA) with fall risk
Procedure
Identify Need: Check if a PTW is needed based on activity, location, and hazards.
Permit Application: Complete the PTW with job details, hazards, and safety measures.
Review and Approval: Verify safety measures and training before approval.
Pre-Work Briefing: Brief on hazards, safety measures, roles, JSA , and emergency and rescue procedures.
Work Execution: Follow permit conditions; pause for any deviations.
Permit Closure: Inspect the site post-task, sign off, restore equipment/site, and document insights.
Key Personnel Duties
Permit Originator: Initiates the permit request.
Example: Field engineer fills out the initial PTW application.
Permit Issuer: Reviews and approves permits.
Example: Site supervisor checks safety equipment before issuing.
Permit User: (holder) executes work per the permit.
Site Checker: inspects the site before work starts.
Key Success Factors of Permit to Work
Training: Regular training on PTW procedures ensures competency.
Risk Assessments: Thorough evaluations of risks before tasks prevent hazards.
Communication: Clear updates on permit status, tasks, risks, and safety measures will reduce confusion and will enhance role clarity.
Digital Tools: Electronic tracking of permits improves efficiency.
Regular Reviews: Updating procedures based on feedback fosters continuous improvement.
Workplace Inspection: Conducting a visual inspection of the worksite measures before approving the PTW
