Corrugated pipe | processing
International technology partnerships, coupled with a global demand for improved products, is expanding the use of corrugated pipe in its traditional markets
Increasing numbers of infrastructure projects – espe- cially in water and sewage – has led to increased demand for corrugated pipe, particularly in large diameters. It means that suppliers are now providing machinery to make ever-larger and more resilient products. Krah of Germany has extended its KR series for
helical pipe production with the introduction of the KR 800 Max.
The output of a KR800 Max is around 1,300kg/h for a pipe DN/ID1000, PE100, with SN8 (according to ISO9969), says the company. It can also make pipes from polypropylene (PP). The KR series of machines from Krah is designed to
produce pipes, fittings and manholes in diameters ranging from DN/ID 300mm to DN/ID 4000mm. Pipes can be produced in lengths from 1m up to 6m – and, on special request, even longer. The main applications for the final profiled pipe
products are non-pressure applications such as drains, storm drains, sewer piping systems and storage tanks, as well as low-pressure applications like irrigation systems. The advantage is that a profiled pipe has a very low
weight, but at the same time can be used for high load applications. A lot less material is needed to produce a pipe with the same structural properties than a solid wall pipe, which means significant savings in material costs, says Krah. Krah’s customer will use the line to produce only
outfall pipes for the first 18 months. These will be connected together using electro-fusion fitting. Due to a new mass distribution valve, the pipe endings are made homogenously with a single die head – which reduces start-up waste to 5kg. Another feature is the production of homogenous, solid wall pipes with a wall thickness of up to 300mm – without any sagging problems and with high produc- tion output. The plant can produce bi-directionally and has been equipped with energy-saving IR-heating. During the demonstration, changing from a profiled pipe with SN8 to a homogenous solid wall pipe with a wall thickness of 30mm was achieved within seven minutes.
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Storming ahead: developments in corrugated pipe
Turkish licence Uponor Infra and Gezer of Turkey have signed a licensing agreement for the manufacture and market- ing of Weholite pipe in Turkey. Gezer is a Turkish manufacturer of solutions for tanks, manholes and pumping stations. It will produce the Weholite pipe at its existing facilities in the Istanbul area, and expects to start selling it in early 2018. The Weholite line, invented by Uponor Infra (formerly KWH Pipe) in the 1980s, consists of polyolefin pipe, fittings and fabricated assemblies. The structured-wall HDPE Weholite pipe is available in various sizes, with inside diameters up to 3500 mm. The pipe is used extensively in low pressure/gravity service applications for drinking water, stormwater, sewage and other liquids. Weholite fabricated assem-
Main image: ADS has
developed a new high
stiffness storm water pipe
called HPXR 75
June 2017 | PIPE & PROFILE EXTRUSION 39
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