In the process industries, pigging refers to technology that uses specialist projectiles to recover, rather than waste, residual liquid in pipelines or industrial tubing. It has progressed from basic equipment used to clean oil pipes, to advanced, fully automated industrial product recovery and liquid transfer technology used today.
Pigging technology has been around in different forms since the early part of the twentieth century. Today, a wide variety of sectors, industries and applications that process liquids use pigging to reclaim liquids from pipelines and tubing, reduce waste and improve the efficiency of their manufacturing and production processes.
Pigging has many benefits, but its basic purpose is to remove or recover residual liquid that remains in a pipeline or tubing after liquid has been transferred from one location to another. The main reasons organizations in process industries use it is to recover product, which increases yields and reduces waste. Process industries also use pigging to clean the inside of pipes and tubing, transfer liquids, reduce the use of cleaning fluids, use less water, save time, improve process efficiency and ultimately increase profits. In addition, because pigging saves resources, product and time, it also helps towards sustainability.