machinery | Large diameter pipe
Right: ADS has developed a new high
stiffness storm water pipe
called HPXR 75
ment. The pipes are permanently resistant to corrosion from the mine water transported here. Given their high flexibility, wash borings with small installation radii are also possible. Any ground subsidence that occurs can be absorbed by the permissible deformation of the pipes without the danger of damage as a result of cracks or breaks.
The benefits of the HDD method in this case include
the relatively minor impact on nature and the environ- ment and the least amount of underground construction work requiring drainage. Being around 6.5m below the river bed meant that piping in the section of the wash boring would need a wall thickness of SDR 17. At the same time, the company’s US arm has started
to produce pipe with diameters up to 2,500mm at a new facility in Charleston Harbor in South Carolina. It says the new plant will help it to “meet the
international demand for next-generation large diameter HDPE pipes”. The Agruline pipes are designed for high volume
flow applications such as cooling water intakes for power plants, large sewage systems, sea water desalination and mining jobs. They are made from PE100, PE100-RC or PE4710 resins which, says Agru, give better long-term hydraulic properties – cutting operation costs and providing high resistance to corrosion, wear and tear and UV radiation. The new production facility can extrude pipe strings
up to 600m directly into the harbour. This can save significant joining and labour costs during installation, as job-site welding can be minimised or eliminated. Because the pipes are buoyant when sealed at both ends, the pipe strings can be towed to their final destination – though pipe can also be delivered by more traditional means.
On the up Advanced Drainage Systems (ADS) has introduced a new type of large-diameter storm water pipe. The new technology, called HPXR 75, provides higher
stiffness, is available in a range of sizes, and has significant cost benefits, says the company. ADS internally developed and designed HPXR 75. It
incorporates a corrugated polypropylene (PP) pipe with a smooth outer wall that includes oriented fibreglass reinforcement – creating a pipe with increased stiffness and improved installation performance. The product is available in diameters of 30-60in, and
lengths of 13-20ft. HPXR 75 will allow for a broad range of backfill
materials and installation conditions, reducing costs while increasing installation speed with confidence of consistent line and grade, says ADS. The watertight bell
42 PIPE & PROFILE EXTRUSION | July/August 2017
and spigot exceeds ASTM D3212 and complies with ASTM F477.
“HPXR 75 will enable us to make inroads in the large
and growing infrastructure and public construction markets for larger diameter storm pipe,” said Joe Chlapaty, chairman and CEO of ADS. “The construction industry is seeking product options with improved service characteristics, installation durability and increased joint performance – and HPXR 75 will address those needs.”
At the same time, Armtec of Canada has made a “multi-million dollar investment” in equipment to make large diameter HDPE storm sewer pipe at its facility in Concord, Ontario. The flexible pipe, with bell and gasket joints, will be
certified to appropriate CSA standards, and marketed under the Boss 3000 trademark. Armtec says that adding large diameter HDPE pipe
to its portfolio will allow it to offer “better alternatives” to its customers. Jain Irrigation Systems of India has added a
2,500mm Battenfeld-Cincinnati polyolefin pipe extrusion line. The line, which was ordered during the K2016 exhibition in Germany, is based on a SolEx NG (‘next generation’) extruder, which has several advan- tages over its predecessor. It now has a barrel with internal grooves which – in
combination with a matching screw and grooved bushing geometry – optimises the extruder’s process- ing attributes. This helps lower melt temperature by up to 10°C, while a redesigned axial pressure profile in the feed zone and barrel helps to cut energy consumption by up to 15%.
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