CCTV pipe inspection is a method of visually inspecting a utility line to detect cracks, infractions, blockages and other imperfections in the line. The process involves navigating a camera through the line, either manually or via a remote control, which provides a video feed of the pipe interior to an on-site monitor for viewing.
How Does it Work?
The first step to performing a CCTV pipe inspection is to find the access point where the camera can be lowered into the utility line. Once the camera is lowered into the line, it can give a very clear picture of the condition of the line, and what the inside of the utility looks like. A robotic crawler, which is used for lines larger than 6” in diameter, is remotely controlled from outside the line by watching the crawler camera on a monitor screen. A push camera, which is used for lines 6” or smaller in diameter, is a smaller camera that is simply pushed through the line by hand. A CCTV pipe inspection can give information as to what is happening in the utility line, and detect cracks, infractions, and other imperfections in the line.
Specialized equipment is necessary to navigate the utility lines and ensure the walls of the pipe are properly illuminated in order to get the clearest picture possible. It is also critical to know the number of access points available, as the more access points we have, the more comprehensive the investigation can be. Also, for a thorough investigation, the number of bends between access points generally should be limited to 3 or less. Once our technician identifies an area of interest within the pipe, they will pinpoint the location from the surface by using Electromagnetic technology to find the camera.
Why Do I Need CCTV Pipe Inspection?
When you need to get a view of what’s going on inside of an accessible pipe, conduit, or even a chimney, CCTV cameras are the right tool for the job. They are often used during both the design and construction phases of a project, to ensure a complete picture at all times. Using CCTV to identify precise issues can be a cheaper alternative to exploratory digging.
For storm and drainage redesign projects, CCTV pipe inspection is often used to determine the feasibility of using sections of the existing system. It can save project owners thousands of dollars to discover that they can reuse existing sections of the system instead of installing new ones.
There are times when a pipe might be damaged or need to be replaced. A CCTV pipe inspection will give information as to where cracking or faulty joints are along the line that may need a structural repair. Instead of replacing the entire line, which could be costly and unnecessary, only the damaged section of pipe would be replaced.
How do you determine when to use a push camera vs a robotic crawler?
A push camera is used for pipes measuring between 2”-6” in diameter, and robotic crawlers are used for larger pipes over 6” in diameter.
Why do you need a pipe inspection?
A video pipe inspection can give information that is not obtainable without a visual inspection. Video inspections can determine if and where there is root intrusion, pipe cracking, offset joint pipes and corrosion.
How far does the camera reach?
A push camera can travel 150-175 feet down a utility line from a single access point, while the remotely controlled crawler camera can travel up to 1000 feet from an access point.
Can you navigate one or more bends/turns?
The push camera is able to make 1 or 2 turns in a line. The crawler camera isn’t designed to make turns, as it puts friction on the line which can cause it to snap.