Around one-third of the world’s gas pipelines can be inspected using ‘pipeline pigs’. These cylindrical devices have figured in three James Bond movies, in one case being modified to secretly transport a person across borders.
Back in the real world, the problem is that the other two-thirds of the world’s gas pipelines can’t be inspected using pigs, so their maintenance has to be based on the theoretical, computed lifespan of the pipe’s components.Originally, pigs carried simple steel brushes for cleaning the inside of pipelines. But these days they can also be crammed with sensors to measure the state and condition of the pipeline.
Author: Stig Øyvann