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Pipeline Pigging & Inline Inspection (ILI) Checklist

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Verify launch/receive safety, tool run planning, and data validation for cleaning pigs and inline inspection tools used in pipeline integrity management programs.

49 CFR 195.45249 CFR 192.493API STD 1163NACE SP0102

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Line Preparation & Cleaning

  • Has line cleanliness been established with cleaning pig runs before the inline inspection tool is run? *
  • Have pipeline diameter changes, tight bends, and valve bore restrictions been verified to pass the selected tool? *
  • Is a gauging or geometry pig run performed to confirm passage before the ILI tool? *

Launcher & Receiver Safety

  • Is the pig trap depressurized, vented, and drained before the closure is opened? *
  • Is the pressure-relieving and interlock system on the trap closure verified operational? *
  • Are personnel positioned clear of the trap closure and end-cap discharge path during launch and receipt? *

Tool Run & Tracking

  • Was the ILI tool type (MFL, UT, geometry) selected appropriate to the anticipated threats (metal loss, cracking, dents)? *
  • Are above-ground markers and tracking used to confirm tool location and velocity during the run? *
  • Was flow velocity maintained within the tool's specified operating range? *

Data Validation & Integrity Action

  • Was the ILI data validated against known features and verified for adequate coverage and sensor performance? *
  • Were reported anomalies assessed against remaining-strength criteria to determine repair or reinspection response? *
  • Are dig verifications performed to confirm tool sizing accuracy where warranted? *

Pipeline Pigging & Inline Inspection (ILI) Checklist 체크리스트 전체 다운로드

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