Technologies

New pipes without digging up the street

We have been using NO-DIG, or trenchless, methods since 1994. They save time and money and reduce the impact on traffic and the surrounding environment.

PE sliplining

Renovating sewer, water and gas pipelines with PE pipe is one way of renewing pipelines using trenchless technology. A pipeline renovated with PE pipe is watertight, load-bearing and corrosion-resistant. The low flow resistance of plastic pipes compensates for the smaller diameter, and the higher flow velocity improves the self-cleansing capacity of the pipes.

Brawoliner

The BRAWOLINER® method is a trenchless sewer renovation system suitable for gravity stormwater and wastewater sewers. The BRAWOLINER® system was developed specifically for renovating small-diameter (50 to 225mm) pipe runs with multiple bends of up to 90°, and it can negotiate up to 2 changes in diameter within the section being renovated.

Pipe bursting

The pipe bursting method is used to renovate water, sewer and gas pipelines. It is similar in many respects to the pipe cracking method and is used where the old pipeline is badly deformed or where the internal diameter of the old pipe proves too small for the new pipe specified in the design. An expander pulled through by static force bursts the old pipe and widens the path for the new one.

Pipe cracking

Pipe cracking is used where the old pipeline is badly deformed or where the internal diameter of the old pipe proves too small for the new pipe specified in the design. A hydraulic expander acting as an impact head breaks up the old pipe and widens the path for the new one.

CIPP – Inpipe

The INPIPE liner is a system designed for renovating gravity sewer pipelines. It combines the best features of other renovation methods. The advantages of INPIPE are:

Flexoren

FLEXOREN is a fast and economical method for renewing sewer pipelines. A flexible pipe, welded into a continuous length, is pulled into the old pipe through the inspection manholes. Excavation is needed only at house connections that have no manhole. Traffic management poses no problems, and streets are closed only briefly. A sewer pipeline renovated using the FLEXOREN method is as good as new – watertight, load-bearing and corrosion-resistant. The low flow resistance of PE pipes compensates for the smaller diameter, and the higher flow velocity improves the self-cleansing capacity of the pipes.

Manhole renovation

When pipelines are renovated, it makes sense to renovate the inspection manholes as well, so that the whole system becomes watertight. Old concrete manholes can be made watertight in two ways.

MaxiLine short-pipe lining

MaxiLine is a renovation method based on the short-pipe lining principle. Pipe sections 50 cm long are pushed into the old pipe using a special hydraulic unit. The work can be carried out through inspection manholes, so the equipment requires little space. The moulded sockets of the pipes have a special locking system that keeps the pipeline watertight and securely joined.

Directional drilling (Grundodrill)

The Grundodrill method is used to build and renovate water pipelines, pressure sewers, gas pipelines and telecommunications ducts.

Grundoram

The Grundoram pneumatic rammer is used to drive metal casings into various types of soil. It is particularly effective where a new pipeline has to be laid under a road. Grundoram often proves to be the only option, as open excavation across railways and major trunk roads is usually not possible.

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