![]() Pigging systems are installed in industries handling products as diverse as lubricating oils, paints, chemicals, toiletries, cosmetics and foodstuffs. Pigging can be used for almost any section of the transfer process between, for example, blending, storage or filling systems. Today, however, the use of smaller diameter pigging systems is now increasing in many continuous and batch process plants as plant operators search for increased efficiencies and reduced costs. Pigging is used to clean large diameter pipelines in the oil industry. ![]() ( February 2015) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. The launching station is then closed and the pressure-driven flow of the product in the pipeline is used to push the pig along the pipe until it reaches the receiving trap-the "pig catcher" (or "receiving station"). ![]() This is accomplished by inserting the pig into a "pig launcher" (or "launching station")-an oversized section in the pipeline, reducing to the normal diameter. These operations include but are not limited to cleaning and inspecting the pipeline. This is done without stopping the flow of the product in the pipeline. In pipeline transportation, pigging is the practice of using pipeline inspection gauges or gadgets, devices generally referred to as pigs or scrapers, to perform various maintenance operations. A scraper pig shown at the Trans-Alaska Pipeline System Visitors Center The wire brush encircles the shaft and scours the interior of the pipeline. A cleaning pig for a 150-millimetre (6 in) oil pipeline. The black rectangles at the top and the circular disks in the center are magnets to attract and remove any loose metal objects in the pipe. The blue plastic disks seal against the inside of the pipe to propel the device and to remove loose sedimentation or scale buildup. A cleaning pig for a 710-millimetre (28 in) oil pipeline.
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