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We explain frequently asked questions here.
Select a question to find the answer.
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.
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.
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.
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.