What is CCTV Pipe Inspection?
CCTV inspections of pipelines and conduits are carried out to determine the condition of that pipeline or conduit or to identify features in that pipeline that may affect its operation. CCTV can provide asset owners with a look inside pipelines that are too small for man entry.
Inspections can be undertaken after a problem has been reported (blockage/roots etc), also they can be completed for damage prevention (build over inspection) or even as scheduled maintenance (eg inspecting a pipeline under a train line every year). The accurate detection and diagnosis of defects is critical to deploying the appropriate course of action for rehabilitation.
CCTV involves propelling a camera through the pipeline either by a camera lens on a rod (Push Camera) or by a robotic camera on wheels (Tractor Camera). Once inside the camera can capture internal images of the pipeline which can be analysed for faults or features.
Using the camera combined with Sonde technology we can pinpoint the location of a fault, feature or even just a simple alignment of a pipeline (ie through someones backyard). With the alignment located and marked on the ground along with any features (ie junctions/buried manhole lids etc) or faults (roots/blockages/breakages etc) it assists in deploying the correct course of action to take.
Types of Pipeline Inspection Units
A robotic crawler using a 6 wheel drive system, commonly known as a Tractor Camera incorporates a pan & tilt camera lens and can be setup in a manhole or open-end pipe. The Tractor Camera is best suited for straight pipelines (manhole to manhole) from 100mm to 1m and beyond.
For pipes smaller than 100mm or with multiple bends or limited access (eg house sewers/downpipes) it is best to use a Push Camera.
The pan & tilt lens fitted to the front of the Tractor provides a high quality image of the inside of a pipeline and sends the live footage straight to the computer. With the live footage and remotely controlled crawler we can provide accurate imagery of pipelines.
There are many situations where a Push Camera is required over a Tractor Camera, usually due to access and pipe configurations. A Push Camera incorporates a camera lens with bright led lights onto the end of a push rod to enable inspection of pipelines or conduits through bends, junctions etc. Suitable uses for a Push Camera include but are not limited to house sewers, downpipes and some pool applications.
Pre & Post Building Inspection Reports
Pre and Post Building Inspections not only prove you haven’t damaged the pipe during the construction but also to have the pipe located for alignment, depth and junctions etc prior to design and construction.
Using a pan & tilt lens with bright led illumination we can inspect boreholes during and after drilling prior to concrete being poured. Working alongside your geotech we can provide accurate vision of the open hole and allow examination of stratification, faults, fractures, joints, fissures and drilling washouts as well as water infiltration etc. The camera provides a depth gauge to assist in determining where certain features are in relation to the surface.
We have a telescopic pole unit with a pan & tilt lens on the end. We have used it in structures such as silos to inspect internal welds and bracing supports where man access is not possible. We have incorporated an air nozzle to blow any excess dust etc off the welds/joins.