hydros® - Trenchless replacement

Trenchless replacement and new installation of mains connection pipes

For the trenchless replacement and new installation of connection pipelines for gas and drinking water mains, compact and robust hydraulic pulling units with traction force and compressive force of up to 200 kN are available. The tried and tested equipment needs only a short set-up time. With displaceable soils, new pipes with an exterior diameter of up to 110 mm and lengths of up to 25 m are no problem.

For the following application areas of trenchless exchange and new installation of connection pipelines we have developed customized and efficient technical equipment:

hydros®BOY:
For the exchange of mains connection pipelines made of rigid metallic materials. By using the press frame, this technology can also be used for the trenchless installation of new pipes.

hydros®LEAD:
This innovative process, described in technical literature as a wind-up process supported by internal pressure, is used to entirely replace lead or flexible plastic drinking water connection pipes.

Of course our trenchless technology meets the requirements of the DVGW GW 325 (A) for the replacement and installation of new mains connections.

Applications

  • BOY
  • LEAD

hydros®BOY: replacement and new installation of connection pipelines

This technology is used for the trenchless, same-channel replacement and new installation of steel, grey cast iron or ductile cast iron gas and water connection pipelines. All available diameters can be replaced using grab jaws. The maximum exterior diameter should be 110 mm, and as a rule the maximum length of one section should be no longer than 25 m.

For the following application areas of trenchless exchange and new installation of connection pipelines we have developed customized and efficient technical equipment:

hydros®BOY:
For the exchange of mains connection pipelines made of rigid metallic materials. By using the press frame, this technology can also be used for the trenchless installation of new pipes.

hydros®LEAD:
This innovative process, described in technical literature as a winding process supported by internal pressure, is used to entirely replace lead or flexible plastic drinking water connection pipes.

Of course our trenchless technology meets the requirements of the DVGW GW 325 (A) for the replacement and installation of new mains connections.

hydros®LEAD: replacement of lead connection pipes

Hydros®LEAD technology, also described as a wind-up process supported by internal pressure, is used for the trenchless replacement of lead or or flexible plastics mains connections, preferably by PE pipelines. As a rule, a pit is only required at the point where the house connection meets the mains, and if necessary a further pit in front of the basement wall.

A special retraction belt developed for this purpose creates form-fit and a friction connection between the lead pipeline and the pulling device. Through the continuous transfer of energy along the length of the section to be replaced, the lead pipes can be extracted from the earth using axial traction force. Even socket joints and other repair areas (e.g. material transition on PE) do not impact the exchange process.

A further hydraulic pulling device has been specially developed for this. The use of this keyhole-technology unit guarantees particular economic success, as the installation time is considerably reduced and only a very small excavation pit is required for the mains pipeline.