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Title: Advances in the deployment of high-pressure pipeline intervention and isolation systems
Category: Pigsource Papers
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: pg3195e
Date of Publication: 1994
Price: $25.00 US
Authors: Brian Thomson
Abstract: Pipeline isolation has historically been used to effect maintenance or repair in pipelines where complete product evacuation has been the practice. There has been an increase in gas supply through large-diameter, strategically- critical transmission pipelines. Since these lines may involve various partners with associated commercial commitments it has been acknowledged that reduction in inventory and possible production losses are critical concerns to the operator. This has resulted in a requirement for isolation system operating pressures to be increased to values closer to the pipeline operation pressure. The use of the isolation system mandates the provision of an isolation plug which does not compromise the safety of personnel or equipment associated with the deployment. The intervention plug and system discussed in this paper provide the necessary safety features to permit the raising of operating pressures to levels previously considered to be technically infeasible. Although this paper tends to focus on gas pipelines, the issues are valid for other fluids.
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