June 2019, Vol. 246, No. 6

Features

Preparing for Unpiggable Pipelines

By Larry D. Payne, President, LP Services   The simple truth is some pipelines may be piggable for certain applications and non-piggable for others. A must for all pigging applications is having the ability to load and receive the pig. The pig launcher and receiver must be designed long enough to allow for loading and unloading the pig and be equipped with nozzles, nozzle location, and valves to allow this operation to occur. For example, cleaning, batching and displacement pigs are normally no longer than twice the pipeline diameter. A 12-inch pig would be about 24-inches long. Whereas, a 12-inch ILI tool could be 10 to 16 feet long depending on the type of ILI tool. Today, a multi-dat

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