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Hydraulically activated pipeline pigging (HAPP) is a pigging technology applied for pipeline cleaning. The basic principle is that a pressure drop is created over a by-passable pig held back against a pipeline's fluid flow. The pipeline fluid passing through the pig's cleaning head is accelerated by this pressure drop, forming strong cleaning jets.
A pig has been used as a plot device in three James Bond films: Diamonds Are Forever, where Bond disabled a pig to escape from a pipeline; The Living Daylights, where a pig was modified to secretly transport a person through the Iron Curtain; and The World Is Not Enough, where a pig was used to carry and detonate a nuclear weapon in a pipeline.
Ice pigging is a technique used for cleaning pipes, distinguished from traditional pigging by the use of a semi-solid 'pig' made of ice, rather than a solid object. This ice pig is capable of flowing through pipes, navigating obstructions such as valves and variations in pipe diameter, due to its fluid-like properties.
The reason why pigs like mud isn't because they're obsessed with skincare. Although we all know a good mud mask works wonders. Nope, as the animal rescue explained in their clip, there are three ...
The Hogettes were a group of fans of the Washington Redskins (now known as the Washington Commanders) who wore women's dresses, garden party hats, and pig snouts. The group was founded in 1983 by Michael Torbert and became a regular fixture at Redskins games for nearly 30 years.
Image credits: LittlestSlipper55 When you look around, you might be surprised how many things have names that can really mislead you. Take guinea pigs, for example.
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Pipeline Filling (Flooding) – which can be carried out by propelling pigs through the pipeline with water or free flooding with water (normally for smaller or unpiggable pipelines). Hydrotesting – this is a process by which the pipeline in question is pressure tested to a predefined pressure above the operating design pressure of the pipeline.