MATERIALS | PRESSURE PIPE
Right: Several PPE award winners were honoured for pressure pipe projects
IMAGE: PPI
Pipe comparison US-based Plastics Pipe Institute (PPI) has published a new document providing a technical basis for comparing PE 100-RC and PE4710 pressure pipe. The document, TN-68, provides a perspective on the slow crack growth (SCG) resistance require- ments for the PE 100-RC designation in compari- son with the North American PE4710 designation. “The PE 100-RC concept has been around since
2009,” according to Patrick Vibien, technical director of PPI. “However, there is a lack of clarity to the implications of the designation and a lack of consensus on whether a comparable designation has value for the North American industry given the already elevated SCG resistance requirements of PE4710.”
Development of the PE 100-RC designation was not due to documented performance issues with PE 100, he said. The grade designation has been promoted internationally by the PE 100+ Associa- tion and is now being introduced into ISO and CEN standards, he added. “Although PE compounds are fairly similar, the test methods and requirements for assessing the performance of the designations differ significantly,” he said.
“Our document goes into detail about this, and
provides a comparison chart and other data that can be helpful.”
Pressure projects In addition, several high-pressure projects were successful at this year’s PPI awards. In the building and construction category, the award went to Versaprofiles of Canada, for a geothermal heating and cooling system for the 1 Java Street project – the largest mixed-use development in New York State to incorporate a ground source geothermal system for heating and cooling. When completed
16 PIPE & PROFILE EXTRUSION | Autumn 2024
in 2025, there will be more than 800 residential apartments plus retail spaces in the block in Brooklyn. The geothermal system included 321 vertical boreholes drilled 499 feet into the ground, spaced 15ft apart with a 1.25in diameter high-den- sity polyethylene (HDPE) PE4710 pipe inserted into each. A total of 326,000ft was used in the boreholes with another 31,000ft of HDPE pipe in various diameters used for lateral distribution. Elsewhere, a corroded steel gas pipeline at
Baton Rouge Zoo was replaced by 1,000 feet of PA12 pipe – which could handle pressures of up to 250psi. Because of its strength and flexibility, the pipe could be installed underground using horizontal directional drilling (HDD), which reduced costs and enhanced safety during both installation and operation. The manufacturer of the PA12 material, Evonik, won the energy piping systems division award. And in New Orleans, city authorities launched a
huge project to replace its 100-year-old water transmission mains with a modern piping system. Using CompressionFit trenchless technology and HDPE pipe from Agru Americas, the local utility estimated an overall 25% savings compared with other methods. The project called for 4,400ft of 48in pipe, installed by Murphy Pipeline Contractors. Espe- cially important to this section of New Orleans was the pipe’s corrosion resistance, flexibility, durability, and lower seismic susceptibility than other piping materials such as concrete or steel.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.agru.at �
www.egeplast.de �
www.strohm.eu �
www.plasticpipe.org
www.pipeandprofile.com
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