line stopping, нефт.

[exsokol]

Добрый день!
подскажите, что такое line stopping. Встречается в тексте про врезку под давлением. Вот контекст:

Hot Tapping and Line Stopping “No Shutdown” Services
We carry the largest and most diverse inventory of Hot Tapping equipment in the world. The equipment is strategically located to respond to your specific project needs in the quickest and most cost effective manner.
 Hot Tap Machines and Accessories
 Line Stopping Equipment and Accessories
 Split Tee Hot Tap Fittings
 Split Tee Line Stop Fittings
 Split Sleeve Mechanical Hot Tap Fittings

Спасибо!

[exsokol]

еще контекст:
Our Line Stopping services are utilized to prevent unwanted shutdowns and keep critical piping and pipeline systems online during tie-ins, relocations, repairs, retrofits, and routine maintenance. you can be assured that every Hot Tap and Line Stop project will be handled by knowledgeable professionals backed by state of the art equipment and a technical services group with the expertise and decades of experience you deserve. Our Line Stop technology offers unique solutions to your most challenging projects. By custom tailoring the right equipment to your exact needs, we can supply the best solution to get the job done right.

[grachik]

Частичное перекрытие, перекрытие участков

[exsokol]

спасибо, я тоже тут нашла:
Line stopping is the process of blocking flow through a segment of piping. This allows for temporary shutoff and flow control, enabling pipe maintenance.
буду использовать "частичное перекрытие", спасибо