Inner Sleeves

Localized, permanent rehabilitation of walkable pipe systems

Inner sleeves are a proven trenchless method for localized rehabilitation of walkable and non-walkable pipe systems. They are particularly suitable for permanent sealing and structural stabilization of local damaged areas.

The system is based on the QUICK-LOCK mounting system and is designed for long-term, structurally stable repair.

For which pipelines is the process suitable?

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Nominal diameter range

DN 100 – DN 3000 (special sizes on request)

Existing pipe materials

Concrete, reinforced concrete, vitrified clay, cast iron, plastic, etc.

Pipe geometry

Round and special profiles

Damage patterns

Cracks, leaks, joint offsets, local structural defects

Area of application

Accessible and non-accessible pipe systems

Areas of application

Sewer channels and pipes
Combined and stormwater systems
Industrial and process pipelines
Repair of individual damaged areas without complete renovation
Areas with high mechanical or geological stress

How the inner sleeve works

The QUICK-LOCK sleeve is positioned in the damaged area and mechanically expanded. The compression of the stainless steel construction permanently presses the EPDM sealing element against the inner pipe wall.

This creates:

an immediately effective seal
a permanent mechanical fixation
a structure-stabilizing connection in the damaged area

The result is a secure, long-lasting rehabilitation without complete renewal of the pipe system.

Materials & Quality

Sleeve: V4A stainless steel (material 1.4404), virtually unlimited service life
Seal: duroplastic EPDM element with long service life
System: QUICK-LOCK sleeves with compression seal
The system has a DIBt approval (No. Z-42.3-374) and meets the requirements of modern sealing technology in pipeline construction.

Downloads

Internal sleeves in practice

Frequently Asked Questions

Everything else you need to know about the technology

When are internal sleeves used?

Internal sleeves are used when local damaged areas are to be sealed selectively and permanently without renewing the entire pipeline.

Which materials are they suitable for?

For concrete, reinforced concrete, vitrified clay, cast iron, and plastic pipes.

How long does an internal sleeve last?

Thanks to the combination of V4A stainless steel and EPDM sealing, the system is designed for a very long service life and is virtually permanently durable.

Is the process trenchless?

Yes. Installation takes place entirely within the existing pipeline without excavation.

What approval does the system have?

The QUICK-LOCK system has DIBt approval (Z-42.3-374).

Which damages can be repaired?

Typical applications are cracks, joint offsets, leaks, and locally limited structural defects.