Staged investigation for long and complex routes
Large Underground Pipeline Leak Detection
For a long or branched pipeline, we may first identify the section most likely to be leaking. That section can then be checked more closely before an excavation point is proposed.
When a staged investigation makes sense
- The route is long or has several branches.
- Drawings are incomplete or the pipe route is uncertain.
- Access and isolation points are limited.
- Operating conditions change during the day.
- A full-route detailed inspection would be inefficient.
- The project needs a priority zone before committing excavation resources.
Review the pipeline route
We begin with the latest drawing, pipe material, diameter, estimated depth, water source, pressure, previous repairs, valve locations and accessible points.
Divide the route into sections
We review the route and available valves, compare sections where safe isolation is possible, then inspect the most likely section in more detail. The agreed scope determines how far each stage goes.
Compare the sections
Suitable acoustic, pressure, flow or isolation checks are used to compare the sections and identify where further work is most justified.
Where reliable flow or meter data is available, unexplained loss may be expressed as m³/day, m³/hour or L/min. These figures help plan the investigation but do not identify the location by themselves.
Inspect the priority section in more detail
The priority section may then be checked with closer listening points, wireless correlation or other suitable methods, depending on the pipe and site.
What Happens After Marking
A first-stage result may identify a suspected pipe section, not an exact digging point. Further inspection may be needed. This does not mean every branch or every leak has been checked in one visit.
Information to Send Us
- Latest route drawing and revision history
- Total length, branches and pipe materials
- Diameters and estimated burial depths
- Valve, hydrant, meter and access-point locations
- Pressure, flow and pump behaviour
- Isolation and shutdown opportunities
- Surface, noise, safety and reporting requirements
What You Receive
We explain the findings and the next recommended step. A marked area, section map or report is provided according to the agreed stage and quotation.
How We Prepare the Quotation
The quotation depends on route length, network complexity, pipe material, access, operating conditions, travel, reporting requirements and the stage of investigation required.
Staged evidence
The first useful result may be a priority section
Long, branched or partly unknown routes are assessed using the information and access available. The work may narrow a priority area for closer checking rather than cover every unknown route or identify every possible leak in one visit.
Send us the pipeline route details.
Share the latest drawing, route length, pipe material, diameter, depth, pressure, valves, access points and operating constraints where available.