Ensuring the longevity of sewer systems is essential for low maintenance, resilient infrastructure and long-term value. Underground sewer networks play a crucial role in managing wastewater, but when they fail, the consequences can be costly and disruptive. Selecting the right material for sewer pipes is therefore key to ensuring low maintenance over the long term.
Leon Woods, Steinzeug-Keramo’s Country Manager UK, explores how vitrified clay pipes are a reliable choice for long-lasting sewer infrastructure and wastewater management solutions.
Why are vitrified clay pipes suitable for sewer projects?
“Thanks to excellent chemical resistance, vitrified clay pipes stand the test of time in the most challenging environments. They are particularly suitable in combined sewer systems and deep trench installations, where access and replacement are usually costly and disruptive.
Sewer pipes are constantly exposed to corrosive substances that can degrade materials over time. It is therefore important that the material used is not vulnerable to chemical attacks and can handle heavy loads from above-ground infrastructure and transport. Vitrified clay pipes perform particularly well in sewer projects because of their resistance to harsh chemicals such as hydrogen sulphide.
They are also completely inert and do not degrade, lose strength or leach harmful materials into the environment. Their smooth interior surface minimises friction, prevents buildup and reduces the risk of blockages, whilst ensuring excellent hydraulic flow.
What are the key benefits of vitrified clay pipes?
Based on Life Cycle Assessment (LCA) studies, we offer the most sustainable sewage solutions compared to alternative materials.
Steinzeug-Keramo’s KERA range of vitrified clay pipes combines long-term strength, circularity, and sustainability for modern wastewater systems.
Are vitrified clay pipes low maintenance?
Vitrified clay pipes require less frequent maintenance, repair and replacement, thanks to their robustness. For example, being impervious to hydrogen sulphide found in sewer pipes and the smooth internal surface lowers the life cycle costs for managing drainage systems. Vitrified clay pipes can often be repaired on site as their rigid structure allows for spot repairs.
The Ceramic Research Centre of Bologna carried out an in-depth study, which involved the analysis of the mineralogical composition of vitrified clay pipes. They found that a mineral called mullite contributes to the material’s high chemical resistance, durability and long-term stability. As a result, vitrified clay pipes maintain consistent surface uniformity, with no increase in roughness over time. This is why some sewer systems installed in the 19th century are still in operation today, as the pipes do not degrade with age, making them a cost-effective long-term investment.
Independent research conducted by Project Hub 360 confirms that if the operational lifespan exceeds 40 years, which is the case with the vast majority of sewer systems, vitrified clay pipes are the best investment from an economic standpoint. Although clay pipes require a slightly higher initial investment of only around 4%, they offer cost savings of up to 65% in the long run compared to alternative materials.
Where else can vitrified clay pipes be used?
Vitrified clay pipes are often used in stormwater drainage systems due to the ability to handle fluctuating water flow, heavy rainfall and flash floods.
Industrial wastewater systems can also benefit from vitrified clay pipes, as the material can withstand the corrosive chemicals and high temperatures often found in these environments without losing strength over time.
Vitrified clay pipes and fittings from Steinzeug-Keramo being prepared for installation in a UK wastewater infrastructure project.
What products are available in the UK?
We have recently launched our KERA range of vitrified clay pipes, which can be used for open trench, pipe jacking and sewer renovation. They are available in a range of sizes from 100mm to 800mm.
Specifically for the UK, we have invested in retooling to produce DN100mm, DN150mm and DN225mm pipes and fittings with EPDM couplers compatible with Naylor Densleeve profiles.
This provides better access than ever before to a wider range of vitrified clay pipes, catering to a diverse range of needs. Whether tackling specific project requirements or helping customers address the latest environmental challenges, we provide comprehensive consultancy services and technical support.”
For more information on Steinzeug-Keramo, visit: https://www.steinzeug-keramo.com/en-gb/
