What is pig sig?
Pig passage indicators are commonly referred to as “PIG-SIGs,” a term TDW originated more than 60 years ago. They accurately detect pigs, spheres, scrapers, and other tools as they pass distinct points along the pipeline and when they reach the receiver, and can also alert operators if a pig is lost or stuck.
How does a pig SIG work?
The TDW Scraper Passage Indicator (PIG-SIG IV) is a device that is installed on a pipeline to detect the passage of a pig or sphere. The PIG-SIG IV has a trigger that extends into the pipeline through a welded fitting that has been tapped. When a pig passes, the trigger is tripped, activating the signaling mechanism.
What is non intrusive pig signaller?
The non-intrusive pig signaller detects the movement of the pig through the use of a magnet or ultrasonic detection through the pipe wall.
What is pig signaller?
Pig signaller or Pig detector is a device installed on a pipeline or pig trap assembly to detect movement of pig. It consists of a mechanism which detects the movement of pig.
How does a pig launcher and receiver work?
A pig launcher is a system used to send a PIG through a pipeline. It uses pressure to propel the PIG out of the launcher barrel and sends it through the pipeline system. The pig receiver is set up on the other end of the pipeline section to receive the PIG.
What is the use of pig launcher?
The main function of a Pig Launcher and Receiver is to allow operators to launch and receive pipeline pigs without disrupting line contents or interrupting and shutting down pipeline operations.
Why is it called pigging?
Some early cleaning “pigs” were made from straw bales wrapped in barbed wire while others used leather. Both made a squealing noise while traveling through the pipe, sounding to some like a pig squealing, which gave pigs their name.
What is launcher in pipeline?
Pig Launchers and Receivers are pressure containing vessels or sections of piping within a pipeline system that are utilized for pipeline maintenance, cleaning, and inline inspection.
What is scraper receiver?
Pig Launchers/Receivers, also known as Scraper Traps, are generally located at terminal points and at compressor stations along the pipeline and provide a safe and efficient means of inserting and removing various types of pipeline pigs. They are available as skidded packages with manual or automated launching systems.
What are pigs in pipeline?
What Is Pigging in Oil and Gas Pipelines? Pigging in the oil and gas industry is a form of flow assurance where pipeline pigs are used to purge, clean, and/or inspect pipelines to keep them running smoothly. Since the operation is hazardous, pigging must only be carried out by experienced professionals.