The Plant Of A Pipeline

1473 WordsOct 4, 20166 Pages
ntroduction Pigging is a critical activity in the commissioning and operation of a pipeline; oil, gas, water or otherwise. For flow assurance the pipeline needs to be cleared of debris and checked for defects, tasks pigs were designed for. The pig needs a method of entering and exiting the pipeline, so a mobile or fixed launcher and receiver are utilised depending on the exact requirements. Pig Launching and Receiving Basics A pig launcher and receiver, also known as a pig trap, are equipment designed to pump in the pig through the pipeline system and to retrieve the pig at the end of the operation. They can be mobile (pigging of construction section) or fixed in the pipeline system. The location of the launcher is located at the upstream end of the pipeline system, near the pump or compressor, while the receiver is at the end of the system. The launcher can be installed in a horizontal, vertical or inclined position. Most are installed horizontally to ease the operation and it is therefore the most preferable. However, due to space limits, vertical or incline pig traps are often considered. The launcher, receiver and all related equipment are designed, manufactured and tested according to the pipeline and vessel code standards e.g.; NACE, ASME VIII, BS 5500, ANSI, ASME B31.3, B31.4, B31.8, etc. A pig trap is essential to get a potential result of product saving. It means that there is no requirement for adding an extensive line flushing as the pig cleaned out the entire
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