MATERIALS | POLYOLEFINS
Society for Testing and Materials (ASTM) F714 standard for outside diameter in water, sewer and industrial applications and ASTM D2737 standard for polyethylene (PE) plastic tubing for water, says the company. Using HDPE 4710 as the base material, it meets or exceeds ASTM D3350 stand- ard for cell classification of materials and conforms to pressure standards as specified by ASTM D3035. “Customers who choose Crystal Line pipe over
traditional copper can enjoy the many benefits of corrosion-free HDPE including 50- to 100-year life span, elimination of solder joints, ease of installa- tion, and shipment on coils or reels,” said Chris Reiter, CEO of United Poly Systems.
Above: Aquaspira and the University of Birmingham are developing low-carbon ‘smart’ pipes for buried infrastructure
MMCD,” said Brian King, executive vice president for product anagement and marketing at ADS. “SaniTite HP is rated for sanitary sewer use, which means it exceeds the MMCD requirements for storm sewer systems and culverts.” The pipe is certified to meet CSA Standard B182.13 by Intertek, a third-party certification body authorised by the Standards Council of Canada (SCC) to certify products, says ADS. The structural performance of SaniTite HP has also been evalu- ated in accordance with American Association of State Highway and Transportation Officials (AASH- TO) Load Resistance Factor Design (LRFD) Bridge Design Specifications. SaniTite HP is available in sizes of 300-1500mm
and provides a smooth interior for hydraulic performance and a profile wall (open or closed depending on diameter) for stiffness and beam strength.
Crystal clear US-based United Poly Systems recently launched a new line of HDPE pipe. Its Crystal Line family, which is available in copper tube sizes (CTS) from 0.75-2in and iron pipe size (IPS) from 0.75-6in, is ideal for potable water, reclaimed water and sewer applications. The company recently made equipment
modifications and upgrades – including new extruders – at its two manufacturing locations, to produce HDPE pipe at the tighter tolerances and smaller sizes needed for CTS dimensions. The pipe is available in three coloured variants for specific applications: solid blue, for potable water; solid green, for sewer water – solid green; and solid lavender for reclaimed water. The print line can be customised for additional information such as project name, distributor, end customer or municipality.
Crystal Line pipe meets or exceeds American 18 PIPE & PROFILE EXTRUSION | March 2021
Carbon reduction Infrastructure pipe that combines steel, plastic and sensing technology could help to ‘decarbonise’ the construction sector. UK pipe manufacturer Aquaspira and the University of Birmingham have begun a nine- month research project to develop low-carbon ‘smart’ pipes for buried infrastructure projects. The pipes have a wound steel core, encased in
PE63 HDPE. Around half the steel is recycled, which helps to reduce carbon footprint. Sensor technol- ogy built into the pipes will detect and report changes in environmental conditions, enabling infrastructure problems to be rapidly identified and rectified.
“Not only will the research deliver low-carbon
drainage solutions for the construction industry, but the new monitoring technologies will be vital for the long-term assessment of climate change impacts on our built environment,” according to Nigel Cassidy, professor of geotechnical infrastruc- ture engineering at the University of Birmingham.
Research results A UK research project, to examine the long-term performance of plastic drinking water pipes, has reported its results – after more than 30 years. Severn Trent Water has exhumed the plastic pipes – installed in special testbeds at two of its pumping stations in the 1980s and 1990s – in the project that it funded with UK Water Industry Research (UKWIR). Pipes and joints have been kept ‘in-service’ and
recently subjected to specific chemical and mechanical testing – especially to predict when the pipes will begin to leak or burst. This information will help to improve the performance of the UK’s drinking water network, as more than 90% of new water pipes are made from PE. Test results show that polyethylene (PE) pipes
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