TECHMAIL: Line Pigs

From: <Paul>
Date: Fri Jun 16 2000 - 18:08:00 EDT

This is the first issue of a new feature, "TECHMAIL". Periodically, partial text from a linked page at PipingDesign.com will be sent to the listmembers, with a URL link to the actual webpage for further reading. Let me know what you think!

Paul
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Pipeline pigs are devices that are inserted into and travel throughout the length of a pipeline driven by a product flow. They were originally developed to remove deposits which could obstruct or retard flow through a pipeline. Today pigs are used during all phases in the life of a pipeline for many different reasons.

Although each pipeline has its own set of characteristics which affect how and why pigging is used, there are basically three reasons to pig a pipeline:

• To batch or separate dissimilar products; • For displacement purposes;
• For internal inspection.

The pigs which are used to accomplish these tasks can be divided into three categories:

• Utility Pigs, which are used to perform functions such as cleaning, separating, or dewatering.
• In Line Inspection Tools, which provide information on the condition of the line, as well as the extent and location of any problems. • Gel Pigs, which are used in conjunction with conventional pigs to optimize pipeline dewatering, cleaning, and drying tasks.

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To read the rest of this text, visit the Pigging Products and Services Association
webpage at:

<http://www.piggingassnppsa.com/about.htm>

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Web-Based Resource for Process Piping Professionals Mailing List: <http://www.egroups.com/group/PipingDesign> Webpage: <http://www.PipingDesign.com> Received on Fri Jun 16 18:08:00 2000