Trenchless Replacement and Installation of Service Lines
Trenchless replacement and installation of service lines using hydraulic pulling units
Efficient Pipe Installation with Compact Pulling Units and Short Setup Times
Compact and robust hydraulic pulling units with pulling and pushing forces of up to 200 kN are available for the trenchless replacement and installation of gas and drinking water service lines. These proven systems require only very short setup times. In compressible soils, new pipes with an outside diameter of up to 110 mm and lengths of up to 25 m can be installed without any problems.
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Efficient Solutions for Trenchless Pipe Replacement and Installation
We have developed customized and efficient technical equipment for the following applications involving the trenchless replacement and installation of service lines:
hydros®BOY:
Replaces connection lines made of rigid metallic materials. When used with the press frame, the system can also be used for trenchless installation.
hydros®LEAD:
This innovative process—referred to in the literature as the “internal pressure-supported winding method”—is specifically designed for the complete replacement of lead drinking water service lines or flexible plastic pipes.
Of course, our trenchless technologies for replacing and installing new service lines meet the requirements of DVGW GW 325 (A).
By the way: Future maintenance and repair work can be performed using standard tools and does not require any special attachments.
hydros®BOY: Replacing and Installing Connection Lines
This method is used for the trenchless, in-place replacement and installation of gas and water service lines made of steel, gray cast iron, or ductile cast iron. When using gripping jaws, pipes of all standard diameters can be replaced. As a general rule, the maximum outer diameter should not exceed 110 mm, and the maximum run length should not exceed 25 m.
We have developed customized and efficient technical equipment for the following applications involving the trenchless replacement and installation of service lines:
hydros®BOY:
Replacement of service lines made of rigid metallic materials. When used with the press frame, the system can also be employed for trenchless installation.
hydros®LEAD:
This innovative method—referred to in the literature as the “internal pressure-supported winding method”—is specifically used for the complete replacement of lead drinking water service lines or flexible plastic pipes.
Of course, our trenchless technologies for the replacement and new installation of service lines meet the requirements of DVGW GW 325 (A).
hydros®LEAD: Replacement of Lead Service Lines
The hydros®LEAD method, also known as the internal pressure-assisted winding method, is used for the trenchless replacement of lead or flexible plastic service lines, preferably with PE pipes. Typically, only one excavation pit is required at the junction of the service line and the service connection, and, if necessary, an additional excavation pit in front of the basement wall.
This is achieved by using a special pull hose developed specifically for this task, which creates a form- and friction-locked connection between the lead pipe and the pulling element. Through this continuous force transmission along the entire length of the replacement section, the lead pipe can be removed from the ground using axial pulling forces. Even bell-and-spigot joints and other repair points (e.g., material transitions to PE) do not affect the replacement process.
In addition, a specially developed hydraulic pulling device was manufactured for this purpose. The use of this keyhole technique guarantees particularly cost-effective results, as it significantly reduces installation costs and requires only a very small opening in the service line.
