Slip Lining Gravity Pipelines

Trenchless rehabilitation of sewer and wastewater pipelines

When wastewater pipelines or sewer networks need to be renewed, open excavation is often the most labor-intensive solution. With slip lining, SWIETELSKY-FABER rehabilitates gravity pipelines trenchlessly, in a controlled manner, and permanently watertight.

For which pipelines is the process suitable?

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Nominal diameter range

DN 100 – DN 2000 (depending on the project)

Existing pipe materials

In pipes of all materials (steel, cast iron, ductile iron pipe, plastic,...)

Pipe geometry

Round, egg-shaped, and special profiles

Condition of the existing pipe

Cracks, infiltration, exfiltration, corrosion, material fatigue

Mode of operation

Predominantly gravity flow operation on a gradient

Hydraulics

Preservation of the existing flow capacity

Areas of application

Domestic wastewater
Industrial wastewater
Mixed and stormwater sewers
Pipelines in sensitive or densely built-up areas
Pipelines with restricted accessibility (e.g. under roads, watercourses or buildings)
Industrial and media pipelines
(process water, chemicals...)

This is how pipe lining works in the gravity flow area

A flexible, resin-impregnated liner is inserted into the existing pipeline by pulling it in or turning it inside out (inversion).

The liner is then pressed against the inner wall of the pipe under pressure and cured. This creates a new, permanently tight and resilient pipe inside the old pipe.

This process enables the economical and sustainable rehabilitation of pipelines without extensive excavation. Interventions in ongoing operations, the surface, and the existing infrastructure are reduced to a minimum.