Abstract
The paper shows a comparison between two intervention methods for interconnecting two gas transmission pipelines within a natural gas transmission system. One intervention implies shutdown of pipelines, while the other one in-service pipelines. Each method is described in detail along with the main technological issues, as well as the related advantages and disadvantages. The technological procedures imply special working techniques such as welding or hot tapping in service pipelines.
Highlights
The natural gas transmission activity often requires pipeline interconnections for different purposes, such as: transfer of certain gas volumes to other consumption routes, enhanced safety of pipeline operation, enhanced safety of customer supply etc.Interconnection of steel transmission pipelines may employ usage of different work procedures, depending on the decision on whether or not to keep the pipelines in service during interconnecting works
Equipping with new pipes implies a thorough analysis of consumption demand in the impacted area, as well as a comparative technical - economic analysis of the work procedures that could be applied
Two or more gas transmission pipelines can be interconnected by shutdown or in-service interconnect
Summary
The natural gas transmission activity often requires pipeline interconnections for different purposes, such as: transfer of certain gas volumes to other consumption routes, enhanced safety of pipeline operation, enhanced safety of customer supply etc. Interconnection of steel transmission pipelines may employ usage of different work procedures, depending on the decision on whether or not to keep the pipelines in service during interconnecting works. The shown case is particularized by analyzing the intervention operations required for the interconnection of the two pipelines in two scenarios: interconnect in-service pipelines and interconnect shutdown pipelines. All interventions on the pipelines are made after detailed analysis of risks implied by both scenarios
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