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FAQ

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Installation

For what old pipe conditions and materials are SAERTEX-LINERs suitable?

Basically, it is technically possible to rehabilitate all old pipe conditions. Metallic, non-metallic-inorganic, organic, and multi-component materials can be rehabilitated.

How is the old pipe cleaned, and what degree of cleaning is necessary?

Generally, the free cross-section of the pipeline must be restored, which means incrustations, deposits, and obstacles (e.g., inward-protruding structural elements, sagging weld seams and misalignments) must be removed flush to the pipe.

Depending on the pipe material and condition, the cleaning can be carried out hydraulically (high/extreme pressure) and/or mechanically (e.g., pig, spring steel scraper, swab).

How are SAERTEX-LINERs drawn in?

To prevent damage to the liner, a sliding film is first of all drawn into the pipeline to be rehabilitated by means of a cable winch. Afterward, the liner is drawn in at a speed of ca. 5 m/min. A swivel prevents the liner from twisting while it is being drawn in.

How are SAERTEX-LINERS cured?

All resins used in SAERTEX-LINERS contain photoinitiators and peroxide in addition depending on the wall thickness. An exothermic reaction is stimulated in these initiators by means of radiation from a UV light source, and the resin is cured.

 

How are the ends of the SAERTEX- LINERS connected?

For pressure pipelines, the ends are connected by means of liner end sleeves (LEM) on a new piece of pipe, or alternatively a suitable pipe coupling. In free-flowing pipelines/sewers, the LEM can be mounted directly on the old pipe, for example.

Is it possible to connect connectors / connecting pieces to a SAERTEX-LINER?

Yes. A variety of techniques are available on the market for free-flow pipelines/sewers. For pressure pipelines, this is the subject of the research and development work of SmC.

Product features

In what nominal size range is the SAERTEX-LINER available?

The SAERTEX-LINER is available for the application range of wastewater free-flow pipelines with nominal sizes of DN 150 mm – DN 1600 mm.

Which resin systems are available for the SAERTEX-LINER?

There is a choice of the following resin systems: polyester resin, vinyl ester resin, and styrene-free vinyl ester resin.

How is the SAERTEX-LINER constructed?

You can find the structure of the SAERTEX-LINER here.

For how long can the SAERTEX-LINERs be stored?

The shelf life of SAERTEX-LINERs is dependent on the resin system that is used and the storage temperature. It can be up to 6 months. Please get in touch with your contact for further details.

Production

What is the delivery time for the SAERTEX-LINER?

The delivery time for wastewater free-flowing applications is usually 10 workdays. This may vary depending on the season.

Are the dry goods manufactured in-house?

As the sole manufacturer of GRP liners, SAERTEX multiCom manufactures everything in-house, from the individual glass fibers to the finished liner.

Are the SAERTEX-LINERs impregnated at the factory?

The SAERTEX-LINERs are impregnated exclusively at the factory.