Follow the tracks

摘要

Simon Bell, iNPIPE PRODUCTS, UK, outlines the developments in pipeline pig tracking, with a focus on design considerations. Various methods of pig tracking have been developed over the years as the methods of pipeline cleaning and maintenance have developed from a closely guarded black art into an ever-improving science. Devotees have long since laughed at the old story concerning the origins of the cleaning tools' terminology as being 'pigs' - because they squeal and rumble like a pig as they pass - but this is one of the oldest and most reliable detection methods.