Adroit Utilities

Pipeline Intervention

Flow Stopping / Line Stopping

Iris Stop, Stopple, Grouted Tees, Hot Taps, Under Pressure Drilling.


Extending and modifying your existing pressurized system while it’s under full operating conditions. Line Stops are used to temporarily shut down a pipeline system to complete modifications or repairs. They allow a system to operate as usual without any interruption of service. Line Stops can be performed on almost any kind of pipeline.

The Line Stop operation consists of a special flanged fitting, a temporary valve, and flow stopping equipment. The fitting is installed and tested, the temporary valve is installed, and the hot tap is completed. After the hot tap, we install the line stop actuator and insert the stopping head into the line.

When the necessary work has been accomplished, the stopping head is removed, and the completion plug is set. The completion plug seals at the flange on the fitting and allows us to remove the temporary gate valve. A blind flange is installed and the operation is complete.

Valve Insertion:

Adroit understands that in most cases, it is undesirable to stop the flow completely and drain it in order to install a new valve. The method above can be used to insert new line valves, branch valves & offtakes if a hot tap is not a viable option.

Advantages to performing a flow stop / line stop include:

Pipeline Intervention Example

High Pressure Plugging Head holding pressure in blue shaded area:

Pipeline Intervention Example

Step 1

The Line Stopping Head is being inserted into the line. When the wheel reaches the bottom of the pipe, the head will pivot and roll into position.

The Line Stopping Head is being inserted into the line.

Step 2

The Line Stopping Head has reached the bottom of the pipe and is now rolling into position. The seal will gradually be created as the sealing element touches the interior wall of the pipe.

The Line Stopping Head has reached the bottom of the pipe

Step 3

The head and sealing element are now in its final position and a seal has been created. The pipeline will be bled off and the modification can begin.

The head and sealing element are now in its final position

Please get in touch to find out more.

Get in touch now for a free quotation & advice >

A dedicated point of contact

All of our clients have a dedicated project manager or point of contact. We are ready to help you with all gas connection requirements.

Call on 01952 681905

Case Studies & Latest News

New Gas Pipeline to British Sugar

Adroit Utilities are celebrating a successful partnership with a PN Daly Ltd on the testing & commissioning of a new 7.5 km intermediate pressure gas pipeline to British Sugar, Cantley.Adroit Utilities were appointed by PN Daly Ltd, a multi-utilities specialist with offices across the UK, to carry out the hydrostatic & pneumatic testing and drying of a […]

learn more >

Complex Refurbishment

A further successful partnership is with leading construction firm Lakehouse on the renovation of an apartment complex. Adroit Utilities joined forces with Lakehouse (a construction specialist with offices across the UK) on the refurbishment of a three storey apartment complex in Lewisham which urgently required repair work to the existing balconies. The project saw Adroit Utilities appointed to undertake the […]

learn more >

Adroit Move Premises

We have recently celebrated a move to larger premises which has been facilitated by an ongoing period of growth and expansion. We have relocated from our previous home in Albrighton, Shropshire to larger dedicated offices, workshop and warehouse at Halesfield 17, Telford. Our new premises are situated near the M54, providing a central position for the facilitation of projects […]

learn more >

View all case studies and latest news >