This mechanical cleaning pig was built 1984 by T.D. Williams Company, based in Tulsa, Oklahoma. The cleaning pig was specifically designed to fit within and clean 48-inch diameter oil pipelines. The cleaning pig is approximately 48 inches in diameter, 2.3 metres long, and weighs around 726 kg. The front of the pig is nose cone, and at either end of the pig are wide cups which press against and hug the interior of the pipe to keep the pig secure. The middle of the pig are extended metal arms for dislodging and removing sludge and other detriment inside the pipe. This maintenance equipment also comes which an array of mechanical sensors to record the conditions inside the pipe, including its integrity and pressure, as well as having odometers for measuring and recording the location of the pig in the pipeline. Cleaning Pig 1984