Pig Pipelines PDF

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In 1994, §192.150 / §195.120 regulations were passed that required each new transmission line and each replacement of line pipe, valve, fitting, or other line component in a transmission line must be designed and constructed to accommodate the passage of instrumented internal inspection devices.


Design & Construction Standards to reduce internal corrosion on Gas Transmission Pipelines – Final Rule May 23, 2007

– New and replaced gas transmission pipelines must be configured to reduce the risk that liquids will collect in the line

– Have effective liquid removal features

– Allow use of corrosion monitoring devices in locations with significant potential for internal corrosion

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TABLES OF CONTENT:

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  1. What is Pigging ?
  2. Why Pig ?
  3. Pipeline Design
  4. Pipeline Operations
  5. Types of Pigs
  6. When to Pig ?
  7. Pigging Safety
  8. Pipeline Cleaning
  9. Geometry Inspection
  10. Metal Loss Inspection
  11. Crack Inspection
  12. Inhibition
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