What is bidirectional pig?
Bi-directional pigs are used in pipeline construction for hydrostatic testing or water displacement, as well as removal of debris and product separation. These pigs have excellent sealing qualities, and their bi-directional design allows the pig to run in either direction in the pipeline.
What is a pigging valve?
In addition to its classic use as shut-off valve, the pigging ball valve functions as pig launcher or receiver valve. The simple, secure, and fast insertion or removal of pigs take place through an interlock that is integrated on the side of the pigging valve and that is locked and secured through a bayonet system.
What is an Argus valve?
The Argus Pig Valve is a full bore double block & bleed valve with a trunnion mounted ball allowing for extended seat life and time saving quarter turn valve action. This design also allows for most Polly-pigs and Spheres to be launched from the pigging valve as well as custom Solid-Cast Turbo-Flow pigs.
Why is it called a pig launcher?
Pigs get their name from the squealing sound they make while traveling through a pipeline. These operations include but are not limited to cleaning and inspection of the pipeline. This is accomplished by inserting the pig into a Pig Launcher – a funnel shaped Y section in the pipeline.
How do I know my pig launcher and receiver?
A Launcher is located at the upstream end of the pipeline to launch the Pig into the pipeline. A Receiver is located at the downstream end of the pipeline to remove the Pig from the pipeline.
What are pigs used for in pipelines?
Utility pigs are used for cleaning, dewatering, and sealing of gas pipelines. To flush a gas line, a utility pig sweeps through the internal section, scraping off debris and semi-solids that obstruct or limit the flow of hydrocarbons.
Why are pig valves used in human hearts?
These valves are actual pig heart valves, and they’re also treated to avoid rejection from your body. They perform similarly to cow valves, but they are less likely to calcify but are more likely to tear over time. Human. This is the least common replacement valve.
What is pigging oil and gas?
“Pigging” is a process in which highly viscous fluids are conveyed out of pipelines. The pig is a cleaning device that is pumped through the pipeline under pressure. Thus, contaminations are conveyed out of the piping. In the oil and gas industry, usually pipelines with large diameters are in use.