Hitexbau HTC Carbon Grids Approved for Use in Drinking Water Systems under DVGW W 270
Gelsenkirchen, Germany – November 2022
Hitexbau GmbH announces that its HTC carbon fibre reinforcement grid has successfully passed microbiological testing in accordance with DVGW Technical Standard W 270 (11/2007) for materials intended to come into contact with drinking water.
The independent assessment was conducted by the Hygiene-Institut des Ruhrgebiets in Germany and documented under test report W-367337-22-SI/Men.
The test certificate confirms that concrete produced using Hitexbau HTC – Gitter is suitable for use in drinking water systems when applied correctly.
Scope of Testing
The examination evaluated the enhancement of microbial growth on material surfaces, as required under DVGW W 270.
Testing conditions included:
- Exposure to groundwater of drinking water quality
- Continuous flow conditions over a 3-month period
- Controlled temperature range (approx. 10–11 °C)
- Monthly, 2-month, and 3-month surface biomass assessments
- Comparison with negative (stainless steel) and positive (paraffin) control samples
According to the official assessment, no critical biofilm formation was detected, and the material met the limiting values defined by DVGW W 270.
Regulatory Significance
DVGW W 270 is a key German technical standard governing the hygienic suitability of materials used in drinking water systems. Compliance confirms that the material does not promote microbiological growth under defined test conditions.
The certificate:
- Was issued on 18.11.2022
- Is valid for five years
- Remains valid until 18.11.2027 (subject to unchanged conditions)
Strategic Importance
Approval under DVGW W 270 significantly expands the application scope of Hitexbau HTC carbon grids, particularly in:
- Drinking water reservoirs
- Water treatment facilities
- Infrastructure rehabilitation in potable water systems
- Concrete structures in water protection zones
The certification strengthens Hitexbau's position in highly regulated infrastructure sectors where hygienic safety and long-term durability are critical.
Executive Perspective
The successful W 270 assessment underscores Hitexbau's commitment to combining advanced carbon reinforcement technology with stringent regulatory compliance.
By meeting the microbiological requirements for drinking water applications, Hitexbau further reinforces its standing as a technically rigorous and quality-driven provider of carbon reinforcement systems for demanding infrastructure environments.