BIO-Liner

Sustainable pipe rehabilitation with bio-based material

The modernization of water and wastewater networks faces a particular challenge: infrastructure must remain high-performing in the long term and at the same time become more sustainable. With the BIO-Liner, SWIETELSKY-FABER offers an innovative close-fit lining system that rehabilitates pipelines trenchlessly while setting new standards in resource conservation.

The BIO-Liner consists of 100% bio-based raw materials such as recycled wood waste and ethanol. It contains no fossil-based ingredients, is recyclable up to eight times, and is certified with the “Proof of Sustainability” by the RSB (Roundtable on Sustainable Biomaterials).

In this way, the BIO-Liner combines the advantages of modern pipe rehabilitation with a significantly reduced environmental footprint.

For which pipelines is the process suitable?

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Nominal diameter range

DN 150 – DN 400

Existing pipe materials

Steel, cast iron, ductile iron pipe, plastic

Pipe geometry

Round, egg-shaped, and special profiles

Condition of the existing pipe

Suitable for ageing, leaks, cracks or material fatigue

Areas of application

The BIO-Liner is particularly suitable for the sustainable renewal of:

drinking water networks
sewage networks
municipal infrastructure lines
sensitive areas with high requirements for environmental and resource protection

This is how the BIO-Liner works

The BIO-Liner is a close-fit relining system in which a prefabricated, flexible pipe is pulled into the existing line.

After installation, the pipe is brought back into its original shape by pressure and heat and fits tightly against the inner wall of the old pipe. This creates a new, tight, and durable pipe system within the existing line.

The work is carried out trenchlessly via existing access points such as shafts. This avoids extensive earthworks and significantly reduces impacts on traffic, residents, nature, and existing infrastructure.

Sustainability in focus

The BIO-Liner stands for a new generation of sustainable pipe rehabilitation:

Biobased PVC
The material is made from renewable raw materials and replaces part of fossil-based feedstocks with biobased components.
Reduced CO₂ footprint
By using renewable raw materials, the environmental impact is reduced compared with conventional PVC products.
Recyclable and circular
PVC is a thermoplastic material and can be recycled multiple times after appropriate sorting and cleaning. The BIO-Liner thus supports the transition to a resource-efficient circular economy.
Long-lasting infrastructure
With an expected service life of up to 150 years, the BIO-Liner contributes to the sustainable and long-term renewal of pipe networks.

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BIO LINER in practice

Frequently Asked Questions

Everything else you need to know about the technology

What is special about the BIO-Liner?

The BIO-Liner combines the advantages of a proven close-fit lining method with an innovative, bio-based material. This enables pipelines to be rehabilitated sustainably while conserving resources.

Is the BIO-Liner made entirely from renewable raw materials?

The BIO-Liner is made from 100% bio-based raw materials. Recycled wood waste and ethanol are used as raw materials, among others.

Can the BIO-Liner be recycled?

Yes. The material is recyclable and can be reused multiple times as part of a functioning circular economy.

For which pipe diameters is the BIO-Liner suitable?

The BIO-Liner is standardly available for pipe dimensions from DN 150 to DN 400. The specific suitability depends on local conditions, the condition of the existing pipe, and the project-specific requirements.

Which ring stiffnesses are available?

The BIO-Liner is available in the ring stiffness classes SN4 and SN8. The selection depends on the static requirements of the project and the existing boundary conditions.

What service life does the BIO-Liner achieve?

With proper planning, installation and use, the BIO-Liner is assigned an expected service life of up to 150 years. This makes the method a long-term solution for the sustainable renewal of pipeline infrastructure.

What materials is the BIO-Liner made of?

The BIO-Liner is made of bio-based PVC. In this process, fossil raw materials are partially replaced by renewable feedstocks. Materials used include raw materials from recycled wood waste and ethanol.

The technical properties correspond to those of comparable PVC systems – with a reduced CO₂ footprint.

Is the BIO-Liner recyclable?

Yes. PVC is a thermoplastic material and can be recycled again after sorting and processing. The BIO-Liner thus supports more sustainable use of resources and the development of a circular economy.

How is the BIO-Liner installed?

The BIO liner is inserted into the existing pipeline via existing access points such as shafts. The folded pipe is then restored to its original shape using pressure and heat and permanently pressed against the inner wall of the old pipe.

This creates a new, sealed pipe within the existing line.

Where is the BIO-Liner manufactured?

The BIO-Liner is manufactured in Sweden and meets high quality and sustainability requirements.