Large diameter pipe | machinery
The largest types of plastic pipe – which are typically used in drainage applications – can be produced at outputs of 3 tonnes per hour. Lou Reade reports
Bigger is better: large diameter pipe
It may seem like a case of sheer brute force, but the technology needed to produce large pipe – often more than 2m in diameter – requires sophistication and close control. After all, even a small increase in pipe wall thickness will mean a lot of material is being given away. Krah Advanced Technologies (KAT) has recently
developed new technology to produce large diameter pipes.
It says that the equipment can be used to make
structured wall pipes and solid wall pipes at high output – but without sagging problems or frozen stresses. The company says that its KR800-Max production line has been used to make 1,000mm internal diameter SN8 pipe, at an output of 1,300kg/hour – including co-extruded inner layer with electrofusion and spigot. Also, it was used to make 2,000mm, SDR11 pipe – for pressure or outfall applications – at an output of 1,400kg/hour.
The same machine has been able to extrude a pipe DN/ID2000mm, SDR11, for pressure or outfall applica- tion. Also the solid wall had no frozen stresses and no sagging.
www.pipeandprofile.com The line is based on a single main extruder and
co-extruder, with an installed extrusion capacity of nearly 1,600kg/hour, which was designed specially for Krah. Each extruder is equipped with a gravimetric system for two components. It used HE3490LS and HE3492-LS-H materials from Borouge/Borealis as reference materials. An integrated control system controls and visualises
the whole plant. Energy consumption can be monitored onscreen, while a smart reporting and visualisation system displays and saves the exact cost of making each pipe. Thanks to the new mass distribution valve, the pipe
ends are manufactured homogeneously with only one die head (the second will be opened at the required time) – so the start-up waste will be reduced to 3kg. Another feature of the KR800-Max line is the
production of homogeneous solid wall pipes with a wall thickness of up to 300mm, without any sagging problems and with high production output. The plant can produce bi-directionally, and is equipped with energy-saving IR-heating. The batch process allows the equipment to produce
July/August 2017 | PIPE & PROFILE EXTRUSION 39 Main image:
Agru’s US arm is producing 2,500mm HDPE pipe at a new
facility in South Carolina
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58