Description

A Pigging Launcher and Receiver is an essential component of a pipeline pigging system. This system is widely used in the oil, gas, chemical, and water industries. Specifically, it allows companies to clean, inspect, and maintain pipelines without interrupting the flow of product. As a result, operations can continue smoothly while ensuring pipeline integrity. Moreover, this technology enhances efficiency and safety in pipeline management.

What is Pigging?

Pigging involves inserting a device known as a “pig” into a pipeline to perform cleaning, inspection, or maintenance tasks. The pig is pushed through the pipeline by the flow of the product (e.g., oil, gas, water) or by another medium such as compressed air or nitrogen.

Components of a Pigging System(Pigging Launcher and Receiver)

Pigging Launcher

• A pig launcher is installed at the beginning of the pipeline.
• It allows the pig to be safely inserted into the pipeline without disrupting flow.
• Typically consists of:
  • Barrel (main body where the pig is inserted)
  • Closure door (for opening/closing the barrel)
  • Isolation valve
  • Kicker line (to push the pig into the pipeline)
  • Drain and vent valves

Function: Load the pig into the pipeline and launch it using pressure.

Pigging Receiver

• A pig receiver is installed at the end of the pipeline.
• It safely collects the pig after it has completed its journey through the pipeline.
• Similar in design to the launcher, with a barrel, closure, and valves.

Function: Trap the pig after transit and allow for safe removal.

How Pigging Works (Step-by-Step)

1. Insert Pig into Launcher:
   • The pig is placed in the launcher barrel.
   • The launcher is sealed, and the system is pressurized.
2. Launch the Pig:
   • The pig is pushed into the pipeline using product flow or gas pressure.
3. Pig Travels Through Pipeline:
   • The pig performs its function (e.g., cleaning, separation, inspection).
4. Receive the Pig:
   • The pig enters the receiver barrel at the end of the pipeline.
   • It is trapped and removed safely.

Types of Pigs

• Cleaning Pigs: Remove debris, wax, scale, etc.
• Sealing Pigs: Used for batch separation.
• Intelligent (Smart) Pigs: Equipped with sensors to inspect the pipeline (e.g., for corrosion, cracks).
• Foam Pigs: Flexible and used for light cleaning or dewatering.

Applications of Pigging Launcher and Receiver

• Pipeline cleaning and maintenance
• Product separation (e.g., different grades of oil)
• Dewatering after hydrotesting
• Inline inspection (ILI) for integrity management

Safety Considerations of Pigging Launcher and Receiver

• Proper isolation and depressurization before opening launcher or receiver
• Use of pressure relief systems
• Training and procedures for pig handling