The pig is dropped into the piping to clean any residue inside the pipeline. It can be very dangerous as it is carried by the flow of the oil. If a spark happens, it can ignite the gas causing an explosion.
Pigging is process of removal of Deposited coke in the heater tubes
a wee is pee
eating
Pigging out...
Pigging out, pigging, hogging out, and hogging started coming into use around 1979 in America.
1000 Ways to Die - 2008 Pigging Out was released on: USA: April 2012
Chopped - 2007 Pigging Out 13-7 was released on: USA: 23 October 2012
The main objevtive of pipeline pigging is cleaning, removing of waxes, breaking of hydraate formation and pipeline inspection
Although both can, explosive material represents a projection hazard by producing shrapnel on impact with a hard object. So, if launching explosive material, be careful. wouldn't want shrapnel to cut into your body!
"Pigging out" brings to mind a hungry pig rooting around in the food trough, eating whatever it finds. It's an idiom that means you're eating a lot.
In 2015, Elton Musk is launching one. The European Union is launching 4 this year. India is launching 6.
Pigging is when a tight fitting (but not sticking!) plug (the pig) is inserted into a pipe, and then made to travel down the pipe by applying pressure to the pipe behind the pig. Pigs can be used to clean and inspect the pipe, and also to separate different batches of material from each other.