June 2011 Vol. 238 No. 6

TechNotes

Piggable Pressure Isolating System For Untapped Live Onshore Pipelines

In a perfect world every pipeline repair or maintenance site would just happen to have a valve on either side to use to isolate the work site. It is not a perfect world but the good news is that help has arrived. With the advent of new communications systems and piggable pressure isolation tools, that isolation capability now exists. In other words, it is now possible to have an internal temporary “piggable valve” placed at any location (or locations) on a pressurized onshore pipeline at any time. Pressure isolation – isolating the work site from the pipeline content under pressure using remotely controlled (tetherless) piggable plugs – is quickly becom

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