October 2009 Vol. 236 No. 10

Features

Pipeline Pigging And Cleaning: What Do We Really Know About It? Part 2

In a previous P&GJ issue Part 1 discussed: Paradigms, Polyurethanes, Durometer, All Cleaning Pig Types, How to Get Started Pigging, Types of Cleaning, What is Clean, and False Paradigms. This conclusion will discuss: “Cleaning a Pipeline, Types of Cleaners, and Pipeline Efficiency, an added benefit in preparation for running an ILI tool. Cleaning A Pipeline There are two types of pipeline cleaning programs available. One type is referred to as mechanical cleaning (the running of mechanical pigs dry) and is the answer most mentioned when asked, “Do you clean your pipelines?” Most debris in a pipeline is in the 4 to 7 o’clock position due to gravity.

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