Rørknæk

Rørknæk, commonly known as pipe bursting, is a trenchless plumbing technique used to replace damaged or outdated underground pipes without extensive excavation. The method involves breaking and expanding an existing pipe from within while simultaneously pulling a new pipe into place through the broken section. This approach is widely employed in residential, commercial, and municipal settings to repair sewer, water, and gas lines efficiently.

The process begins with an access point being created at the surface, typically near the end of the pipe section requiring replacement. A specialized machine inserts a bursting head into the old pipe, which is then pulled through the line by a cable or hydraulic system. As the bursting head advances, it fractures the existing pipe, creating an enlarged opening. Simultaneously, a new pipe, often made of polyethylene (PE) or other durable materials, is fed through the bursting head and into the broken section. The new pipe is then expanded to fit the enlarged opening, ensuring a secure and leak-free connection.

Rørknæk offers several advantages over traditional digging methods. It minimizes surface disruption, reducing costs associated with property restoration and potential legal or environmental concerns. The technique is also faster, often completing installations within a single day. Additionally, it is less invasive for landscapes, driveways, and sidewalks, making it a preferred choice in urban and densely populated areas.

However, the method has some limitations. It is most effective for straight or gently curved pipes and may not be suitable for severely damaged or collapsed sections. Proper assessment of the existing pipe condition and alignment is essential before proceeding with rørknæk to ensure successful execution. Skilled professionals should perform the procedure to avoid complications such as pipe misalignment or damage to surrounding utilities.