TPT July 2014

Technology News

High-pressure tubes – 3,000 bar and above

walled common rail systems for ships. Prototypes can be made in just a few days and validated as in series production. In addition, an integrated manufacturing plant was constructed in Ajka, Hungary, in 2013. High-strength tubes are drawn here and processed into components under one roof. The flexible processes that are optimised throughout meet the highest requirements of cleanliness in accordance with 0ppm targets. Common rails and diesel injection lines are manufactured in series for system pressures up to 3,000 bar and beyond. Poppe + Potthoff GmbH – Germany Fax: +49 5203 91 66100 Website: www.poppe-potthoff.com oils. These PA pipes feature good flexibility, reduced water absorption, and high resistance to low temperatures, humidity, cracking and abrasion. Through a continuous thickness control and diameter adjusting system, Amut lines ensure the quality of pipes, even when frequently changing product features and dimensions, at constant production working conditions. Amut extrusion lines are supplied with gravimetric dosing units to keep the layer thickness constant and to control the size and weight of the pipes. Plasticising units, barrels and screws are all made of special alloys to ensure resistance to abrasion and corrosion, and their particular geometries are essential to obtain high production rates and homogeneous quality of the melt, at low energy consumption. The limited friction of the extruded material in the sizers allows control of the tension acting on the pipe, to achieve high extrusion speed, such as 60-70m/min in the case of five-layer pipe extrusion.

special manufacturing method, its high- pressure lines are considered to be very safe. Diesel injection technology has accompanied the family-run business, which was founded in 1928, for more than 40 years. With high-carbon steels E 355, PP 600 and the newly developed PP 1000, three high-strength standard materials are available for high- performance lines. The autofrettage systems and test benches specifically developed by the engineering company Poppe + Potthoff Maschinenbau GmbH ensure the fatigue strength of the high- pressure lines. The company’s technology centre, close to the precision steel tube mill in Werther, Germany, develops customer- specific solutions, such as double- For example, the company delivered in Vietnam an extrusion line for the production of PE100 pipes with an external diameter of 1,000mm. A new compact extrusion die and an extruder capable of reaching an hourly capacity of 1,200kg were designed and manufactured for this purpose. The die is provided with 16-spiral distributors to ensure wall thickness uniformity on the whole pipe, while the extruder is based on a bimetallic barrel and wear-proof coated screw. For the automotive industry, Amut offers lines to produce multi-layer PA pipes (up to five layers), which are largely used to convey fuels or hydraulic

THE Poppe + Potthoff Group provides a range of products and services in high- pressure technology. The company’s seamless precision steel tubes are used in hydraulic units, pressure test benches and injection systems for diesel engines. The company states that, thanks to a

Common rail system with diesel injection lines from Poppe + Potthoff

Extrusion lines for pipes AMUT manufactures line configurations to extrude pipes, offering solutions for several materials and diameters.

The range of production includes PVC pipe lines with diameter of 16-1,200mm for rigid pipes and 8-63mm for flexible pipes; PE pipe lines (mono and multi- layer) with diameter of 16-1,600mm; and special pipes (multi-layer) such as PE-X, PA (fuel pipe), PP with glass fibre reinforced inner layer (hot water), flexible PVC braided/reinforced hoses, irrigation, foam core, corrugated, bi- oriented and automotive pipes. Focused on the needs of its customers, Amut mainly develops tailored lines and special equipment.

Amut SpA – Italy Fax: +39 0321 474 200 Email: amut@amut.it Website: www.amut.it

Amut manufactures a number of extruded tube solutions

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J uly 2014