Capturing emissions | Pipelines of the world

This emissions recovery system exceeds expectations for pipeline depressurization, says Adam Murray, vice president of performance products, WeldFit, USA.

Like many other pipeline operations, when a midstream operator in the central plains of North America had to make updates and tie-ins to a newly acquired 136-mile section of 16-inch gas pipeline, he was already faced with multiple challenges. Not only were they focused on the day-to-day tasks associated with the safe and efficient transport of products, but they were also working to meet the growing demand from the public and investors – not to mention their own goals – to minimize gas emissions at greenhouse effect (GHG). . And they had to find ways to accomplish all of those things while achieving the overriding goal of all businesses: to stay profitable.

With pipeline depressurization being an important part of this project, they turned to WeldFit’s ReCAPTM emissions recovery system to avoid venting or flaring. Until recently, these were the only options for releasing all natural gas into an isolated line so that maintenance, testing or other projects could be carried out safely, but both came at a cost in terms of emission of methane into the atmosphere – something the operator was eager to avoid.

Rather than performing costly double block and bleed line stops at multiple mainline valve stations and tie-in locations, the operator decided to depressurize the entire pipeline section and perform many operations simultaneously. Using WeldFit’s ReCAP equipment to depressurize the pipeline segment, recover its more than 35 million cubic feet of natural gas, and transfer methane from the depressurized section to an adjacent pressurized system, saved the EPA equivalent of:

  • GHG emissions from over 3,500 gasoline-powered passenger vehicles driven in a year.
  • CO2 emissions over 1.8 million gallons. fuel consumed.
  • The carbon sequestered by nearly 20,000 acres of forest in one year.

The entire operation took only a few days, significantly limiting downtime compared to other interventions. The company’s ability to achieve its operational objectives and ESG objectives simultaneously with ReCAP was not an isolated event. Since WeldFit introduced the system in August 2021, pipeline operators across the United States have successfully used it to depressurize their lines and recover their gas before beginning maintenance, repairs, modifications and other projects. common pipelines…

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