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How does Inspection Pipeline Inspection Gauges (PIG) work?

Pipeline Inspection Gauges (PIG) are equipment used to inspect oil and gas pipelines. They are a cylindrical device, moderately sized, that move inside the pipe. PIGs usually consist of a series of devices with sensors that detect various parameters of the pipeline, such as pressure, flow, temperature and corrosion.

PIG works by putting it inside a pipe and propelling it through the pipe. There are usually two propulsion methods for PIG: hydraulic propulsion and compressed gas propulsion.

In hydraulic propulsion, high-pressure liquid is pumped into the pipeline, pushing the PIG into the pipeline. In the case of compressed gas propulsion, compressed air or nitrogen is introduced into the pipeline to propel the PIG forward within the pipeline.

Once PIG enters the pipeline, it starts executing tasks. It collects various parameters within the pipeline and sends this data back to the host computer for analysis. In addition, PIG can detect and report on damage, corrosion and other problems in the pipeline.

Inspection Pipeline Inspection Gauges (PIG)

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