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Summary

Description
English: A station on a natural gas pipeline used for the loading and unloading of pipeline inspection gauges, commonly known as "pigs". Photographed near Dübendorf, Switzerland.

Additional annotations from the English Wikipedia by users Cadmium, Mannings, and BrutonD:

This station is for loading or unloading pigs, the pigs are used for cleaning out or inspecting pipelines. This station is designed to receive pigs from the upstream section and launch pigs into the downstream section, with a cross-over for the fluid to flow from one section to the next. The pre-installed thrust blocks (those empty concrete rectangles in front of the blank flanges) are to support a (temporary) pig-trap which is bolted on to the pipeline in place of the blind flange. The pig-trap normally includes a section of larger diameter pipe to allow the pig to come to a gentle stop with flow passing around the pig. After closing the valves for isolation, the pig can be removed via a quick opening closure (like a flange) on the end of the pig-trap. The fact the pig-traps are not present means that this pipeline is not pigged regularly.
Deutsch: Molchschleuse für Reiniungs- oder Gassortentrennunngszwecke in einer Gas-Fernleitung
Source Own work
Author Audriusa (Audrius Meskauskas)

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Date/TimeThumbnailDimensionsUserComment
current17:30, 29 January 2006Thumbnail for version as of 17:30, 29 January 20061,537 × 1,030 (208 KB)AudriusaThe device, related to the industrial gas pipe line. Photographed in Switzerland near Dubendorf. I know that this pipeline is used to transport the natural gas, and that this device is the most likely part of the pipeline. Being not expert on pipelines, I

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