About LineStopping
LineStopping/Stopping is a mechanical method of forming a temporary isolation in a live main, where some flow exists and thus cannot be frozen, or a total shutdown is not an option.
LineStopping has the added advantage that a bypass can be installed so as to maintain flow, thus negating the need for a shut down or major disruption to services. LineStopping/Stopping can be used on most common pipeline materials such as Steel, Cast Iron, Ductile Iron, Copper, Stainless steels, Plastics and Cement Asbestos.
One or more bespoke fittings are either welded or bolted on to the pipeline, to which valves are fitted. The pipe is Under Pressure drilled as required, and then the LineStopping/Stopping equipment is installed. If a bypass is required it will be set up during the installation of the LineStop and proved prior to the flow in the main being stopped.
On completion of the work the equipment is removed and the bespoke fittings are plugged, and a secondary cap fitted for increased integrity.
The Benefits of LineStopping and Bypassing
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Services maintained with little or no disruption
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Little or no loss of harmful liquids or gases
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Ingress of contamination drastically reduced
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No drain down or backfilling time
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Ideal for isolating sections of ring mains
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Can be applied to a large range of Liquids, Gasses and Compressed Air
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Suited for Fire protection, Sprinkler systems and Hydrants etc.
Step 1:- Firstly a bespoke fitting is attached to the pipe.
Step 2:- Then a temporary valve and the drilling rig are attached to the clamp.
The apparatus is pressure tested to ensure a true seal before drilling
commences.
Step 3:- The pipe is then drilled and the LineStop rig is inserted.
Note: This picture shows the LineStop head in place
Step 4:- Finally the clamp is capped off and left with the system running as normal.
Below shows the LineStops in use with incoporated bypass.
