Steel-mandrel pigs are a more long-term, long-life pig. They consist of a steel mandrel body with replaceable sealing
elements (cups and discs). They can also be equipped with abrasive components (brushes and blades) for removing deposits on the interior pipe wall. The advantage of steel pigs is the ability to replace
the wearing components.
Following are the most common styles of steel pigs with model numbers and best suited applications.
