Gas Pipeline Isolation, Tecno Plug, Valve Changeout while Production is Maintained

42" pipeline isolation using STATS Tethered Tecno Plug and 46" door plug allowing a 42" launcher valve to be safely replaced while gas production maintained.
STATS’ DNV type approved Tecno Plug® provides failsafe double block and bleed pipeline isolation. Systems can remain pressurised, live and operational while they are repaired. The isolation plugs provide dual seals with a zero-energy zone to enable maintenance work on pressurised systems to be carried out safely and efficiently. The dual seal configuration of the pipeline isolation plug provides an annulus void between the seals which can be pressure tested to verify both seals are leak-tight before maintenance work is carried out. Both seals are leak tested with full pipeline pressure. Once the seal integrity has been proved the annulus is then vented to ambient pressure to create a zero-energy zone, providing effective double block and bleed pipeline isolation. The large section elastomer seals are highly compatible with poor pipe surfaces and are engineered to suit corrosion or ovality issues ensuring a leak-tight seal even in ageing assets. The isolation plug has the ability to monitor the isolated pipeline pressure, this is achieved via a dual-sealed pressure impulse line and ensures there is no leak path through the tool. If required, pressure application through the isolation plug is attained by adding an additional module containing a second equalisation valve. Pipeline isolation safety is ensured as two separately controlled valves need to be functioned to allow pressure communication through the Tecno Plug.
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