Why use Pipe-Bursting?
Pipe- bursting is a proven and cost-effective method for replacing underground utilities of most conveyance types. Pipe-bursting has numerous advantages in comparison to other replacement options, primarily the ability to increase the host utilities size and, in fact, multiple sizes in some cases.
What type of pipes can benefit from Trenchless Pipe-Bursting?
First and foremost when considering any pipe-bursting project, it is important to identify the type of material of the existing pipeline. Over the last 100-plus years, gravity and pressure pipes have been installed made of wood, brick, clay, iron, cement, asbestos cement and plastics as well as other less common types and variations of these pipe materials. Pipe-bursting must fracture and split the existing pipe. Therefore, pipes are most often classified as “fracturable” or “non-fracturable” and that helps determine both the method of pipe-bursting that can and should be used as well as the type of “burst head” or “splitter” that will be necessary to properly “burst” the pipe. Nearly all pipe types can be safely burst if considerations are made for how they will react to the bursting process. The most common types of gravity sewer pipes burst and replaced are: vitrified clay pipe (VCP), asbestos cement (AC), concrete pipe (CP) and PVC. With a properly designed pipe bursting system, materials such as reinforced cement pipe (RCP) and even brick can be burst very successfully. In municipal water main replacement, which is widely popular overseas and gaining more acceptances in North America, CI, AC and DI are the most common pipe types being replaced. These pipes must be “split” and not necessarily “burst.” However, the process is very similar to that of a fracturable pipe.
What size pipe can be replaced?
Hydraulic bursting is mainly used for online replacement of sewers and gravity pipelines ranging in diameter from 6” – 20”. The static bursting method can typically be used for pipes ranging in diameter from 4”- 42”. The pneumatic method is primarily used for replacing gravity pipes and the static method is primarily used for pressure pipes ranging in size from 4” – 42” in diameter along with applications in gravity pipes.
Other possible applications?
Pipe-bursting may also be used to expand pipeline carrying capacity by replacing smaller pipes with larger ones, or “upsizing.” Extensive work in the gas and water industries has demonstrated the feasibility of upsizing gas mains, water mains along with sewers. Upsizing 2, 3, & 4 times the current pipe diameter is now well established, and larger 18? 21? 24? & larger VCT/Concrete pipes have been replaced.