Hot Work Permit Issuance

NFPA 51B procedure for issuing a hot work permit (welding, cutting, brazing, grinding) outside designated areas. Covers fire watch, combustible removal, ventilation, and post-work monitoring.

Steps

• The operator confirms that the task qualifies as hot work
  The operator verifies that the planned activity involves welding, cutting, brazing, grinding, or another spark-producing task outside a designated hot work area. If the task does not qualify, stop and use the appropriate non-hot-work procedure.
• The competent person reviews the work location and scope
  The competent person inspects the exact work location, adjacent areas, and the planned duration of the hot work. The competent person identifies nearby operations, occupied spaces, overhead hazards, and any conditions that could increase ignition risk.
• The competent person removes or protects combustible materials
  The competent person removes combustible and flammable materials from the area whenever practical. If removal is not possible, the competent person protects the materials with approved fire-resistant covers, shields, or barriers and establishes the required clearance per site rules.
• The competent person verifies ventilation and atmospheric conditions
  The competent person verifies that ventilation is sufficient to control fumes and prevent accumulation of flammable vapors. If the area is enclosed, partially enclosed, or has a known vapor source, the competent person tests conditions and escalates any unsafe deviation before work begins.
• The supervisor assigns a trained fire watch
  The supervisor assigns a competent fire watch who understands the hazards, has no conflicting duties, and can maintain continuous observation during the work. The supervisor confirms the fire watch has the required extinguisher and knows the escalation procedure.
• The competent person completes the permit-to-work review
  The competent person reviews the permit fields, confirms the work scope, location, duration, controls, fire watch assignment, and emergency contacts, and documents any site-specific restrictions. The competent person does not issue the permit until all required controls are in place.
• The supervisor authorizes and issues the hot work permit
  The supervisor signs the permit only after verifying that the area is prepared, the fire watch is assigned, and the work is within the approved scope and time window. The supervisor communicates any permit conditions, stop-work triggers, and escalation requirements to the operator and fire watch.
• The operator performs the hot work within permit limits
  The operator performs only the approved hot work activity and follows the permit conditions, including work area boundaries, PPE, ventilation, and housekeeping controls. The operator stops work immediately if a deviation, new hazard, or unsafe condition occurs.
• The fire watch monitors the area during and after work
  The fire watch remains in place during the hot work and continues monitoring the work area and adjacent spaces after the work ends. The fire watch checks for smoldering material, heat buildup, smoke, or delayed ignition and escalates immediately if any abnormal condition is observed.
• The supervisor closes the permit and records any non-conformance
  The supervisor confirms the work area is free of visible fire, hot spots, and leftover combustibles, then closes the permit. If any deviation, incident, or non-conformance occurred, the supervisor records it and escalates it according to site procedure.