Published Online: 15 JUL 2006
Copyright © 2002 by Wiley-VCH Verlag GmbH & Co. KGaA
Ullmann's Encyclopedia of Industrial Chemistry
How to Cite
Hiltscher, G. and Mühlthaler, W. 2006. Pigging Technology. Ullmann's Encyclopedia of Industrial Chemistry.
- Published Online: 15 JUL 2006
The article contains sections titled:
|7.||Decision Criteria for Pigging|
|8.||Example of an Industrial Pigging System|
|9.||Special Fields of Pigging Technology|
Pigs are devices which are inserted into and travel through a pipeline, driven by a liquid or gaseous propellant. Installation and operation of pipelines would not be possible without pigging technology. Applications of pigging include sweeping liquids from pipelines, removing condensate, separation of products, inspection, cleaning, and repair. The action of products and/or propellants on pig materials can lead to physical and chemical reactions.
Depending upon function, different designs of mechanical and intelligent pipeline pigs are used. Smart pigs are used above all for in-line nondestructive testing of pipelines. Some basic risks must be taken into account when a pigging system is planned.
Examples for industrial pigging units are found in food and beverage industry, cosmetics, pharmaceuticals, and in the chemical industry.