STATS Group recently successfully completed a 20in valve change-out on the Yanga platform, offshore the Republic of Congo. Halliburton contracted the company on behalf of Total E&P to provide pipeline isolation to replace a launcher valve located downstream between the Yanga export and Sendji production lines. The Sendji production line was to remain live and online during the valve intervention works which utilized a 20in Tethered Tecno Plug as the primary isolation, with an additional modified 24in Tecno Plug deployed to isolate the launcher door and provide umbilical management. Once the valve change-out was complete, STATS deployed a 20in in-line weld test tool to carry out a leak test on the reinstated flange joint while the Tecno Plug remained in place to provide safe isolation. Due to the timely completion of the isolation and valve change-out, the operator carried out an additional change-out of three valves. The six-day operation was STATS’ first project completed in the Republic of Congo.