Process Hazard Analysis Field Verification

Field verification inspection for process hazard analysis (PHA) under OSHA 1910.119 PSM, focused on identifying deviations, verifying safeguards, and tracking recommendations.

Inspection Scope and Walkdown Setup

• Process unit and equipment boundaries are clearly defined
  Verify the inspection scope matches the intended PHA field verification area, including unit limits, equipment tags, and exclusion areas.
• Current P&IDs, PHA worksheet, and applicable procedures are available
  Confirm the team is using the latest approved reference documents for the walkdown.
• Inspection participants include operations and maintenance representation
  Verify that knowledgeable personnel are present to support field verification and answer equipment-specific questions.
• Required permits, access controls, and PPE are in place
  Confirm entry requirements, hot work restrictions if applicable, and task-appropriate PPE before beginning the walkdown.

Equipment Identification and Configuration

• Equipment tags match the P&ID and unit identification
  Verify vessel, pump, line, valve, and instrument tags in the field match the approved drawings and process labels.
• Installed equipment configuration matches documented design intent
  Check for bypasses, temporary hoses, blanked connections, removed components, or undocumented modifications.
• Line routing and flow direction are consistent with documentation
  Verify piping routes, tie-ins, and directional indicators against the current P&ID and field conditions.
• Isolation points and valve positions are as expected for normal operation
  Confirm critical valves, blinds, and isolation devices are in the correct position for the process state being verified.
• Any field deviation from the P&ID is documented
  Record all observed deviations, including temporary changes, undocumented fittings, and discrepancies requiring MOC review.

Safeguards and Protective Systems

• Pressure relief devices are installed, identified, and unobstructed
  Verify relief valves, rupture disks, and discharge paths are present, labeled, and not blocked or isolated.
• Safety instrumented functions and alarms are present at the field location
  Confirm critical alarms, interlocks, and shutdown devices identified in the PHA are installed and accessible for verification.
• Emergency shutdown and isolation devices are clearly marked and accessible
  Verify emergency stop stations, isolation valves, and shutdown controls are visible, unobstructed, and reachable.
• Secondary containment and spill control features are intact
  Check dikes, curbing, drains, sumps, and containment systems for damage, blockage, or loss of capacity.
• Guarding, barriers, and access restrictions protect personnel from process hazards
  Verify physical barriers, machine guarding, and restricted access controls are in place where needed.
• Safeguard deficiencies or missing protections are recorded
  Document any absent, damaged, bypassed, or degraded safeguards that could affect the PHA conclusions.

Operating Conditions and Process Deviations

• Visible leaks, drips, corrosion, or abnormal wear are absent or controlled
  Inspect pumps, flanges, valves, hoses, vessels, and connections for signs of leakage, corrosion, or deterioration.
• Temperature, pressure, and level indications appear normal for the process state
  Compare field indications to expected operating conditions and note any abnormal readings or instrument discrepancies.
• Bypass lines, temporary connections, or out-of-service equipment are identified
  Verify whether any bypassed instruments, temporary hoses, or isolated equipment are present and properly controlled.
• Housekeeping does not create a process safety hazard
  Check for blocked access, combustible accumulation, or materials stored near hot surfaces, rotating equipment, or emergency equipment.
• Observed process deviations are documented with location and equipment tag
  Record any abnormal operating condition, including the exact location, tag number, and observed condition.

Documentation, Recommendations, and Follow-Up

• Each deficiency is assigned an owner and due date
  Verify that every non-conformance or recommendation has a responsible person and target completion date.
• Recommendation severity and risk priority are documented
  Classify findings by risk significance so high-priority items can be escalated appropriately.
• Corrective actions are linked to MOC, work order, or action tracking system
  Confirm the finding has been entered into the appropriate management system for follow-up and closure.
• Recommended follow-up inspection date
  Enter the date for re-verification or closure review if the deficiency requires a return visit.
• Inspector summary of field verification results
  Provide a concise summary of the walkdown, key deviations, safeguards verified, and any immediate escalation required.
• Inspector signature
  Signature confirming the inspection was completed and findings are accurate to the best of the inspector's knowledge.