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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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- What is Pigging ?
- Why Pig ?
- Pipeline Design
- Pipeline Operations
- Types of Pigs
- When to Pig ?
- Pigging Safety
- Pipeline Cleaning
- Geometry Inspection
- Metal Loss Inspection
- Crack Inspection
- Inhibition
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Link - https://cutt.ly/1IOr2kL
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