pigging\ valve

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Pigging — of the product in the pipeline is used to push it along down the pipe until it reaches the receiving trap the pig catcher .If the pipeline contains butterfly valves, the pipeline cannot be pigged. Ball valves cause no problems because the inside… … Wikipedia
List of oil field acronyms — Contents 1 # 2 A 3 B 4 C … Wikipedia
Pipeline transport — An elevated section of the Alaska Pipeline … Wikipedia
Pipeline inspection gauge — There are four main uses for pigs: # physical separation between different liquids being transported in pipelines; # internal cleaning of pipelines; # inspection of the condition of pipeline walls (also known as an Inline Inspection (ILI) tool);… … Wikipedia

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