TPT May 2007

T ube R ussia – 28 - 31 M ay , 2007 ›››

furnaces for annealing lines and continuous annealing lines. In the area of gas jet cooling technology for steel tubes, the company has recently modified a 15-year-old Ebner roller-hearth furnace for boiler pipe production at Zeleziarne Podbrezova in Slovakia. This furnace is used for heat treating seamless-drawn steel tube at anneal temperatures of up to 1,070°C, with a cooling rate of 300K/min in process atmosphere. In addition to modernising the combustion system in Zeleziarne’s furnace and installing new hearth rollers, Ebner installed a 2m-long quenching zone with an atmosphere jet cooling and automation system. The cooling gradient of 300K/min can successfully achieve an austempered bainite microstructure throughout the 6mm tube wall thickness without tube deformation. Ebner has also supplied the latest Hicon/ H2 ® roller-hearth automatic furnace for Poongsan Corp in Korea, one of the world’s largest producers of copper semi-finished products. An annealing facility for level-wound copper tube coils has been installed at Poongsan’s Ulsan works to meet increased quality specifications. With a throughput of 3t/h, the temperature scatter throughout the charge is just +1.5°C by the end of the soaking zone. The gas-tight design of the furnace and cooling section ensures low oxygen content in the process atmosphere (2 per cent hydrogen, balance nitrogen), and prevents discoloration of coils. The cold/hot tube purging system guarantees the lowest level of contamination inside the tube, especially on ‘inner grooved’ tubes. A roller-hearth furnace, to process tubes in straight lengths and in coil-form, has also been installed at Buntmetall Amstetten. Using the furnace, charge material is annealed in process atmospheres at a throughput of 2,000kg/h, with a maximum furnace chamber temperature of 850°C. The furnace can accommodate maximum tube lengths of 11m, with operation in semi-continuous or continuous mode. The jet cooler section of the cooler was newly developed specially for CuNi tubing.

EFD Induction AS Norway

Elmaksan Ltd Turkey

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Stand FO-A03

Stand FO-E03

Founded in 1983, Elmaksan Ltd is one of the leading Turkish companies in the design and production of profile machines, slitting machines and cut-to-length lines. The company’s slitting lines can be used on a range of materials including ferrous metals, cold and hot carbon steel, stainless steel, copper, brass, galvanised and other types of metal alloys. With the company’s pipe and profile lines, the user can manufacture products with different diameters. Easily changeable equipment is used on these lines in order to reach the fastest manufacturing speed. A flying saw with high performance can also be incorporated into pipe and profile lines, according to user requirements. are designed as manual or automatic, and are intended to undertake sensitive packaging using sheet and plastics. The company’s machines are manufactured with the latest versions of CAD (Auto-CAD), CAM (solid CAM, master CAM, mechanical Cobra design, Microstation) and other types of design and construction programmes. All departments, from engineering to production, are linked to provide an interactive manufacturing process and use CNC lathing machines to reduce faults to a minimum. Elmaksan’s cut-to-length lines

EFD Induction develops, commercialises and supplies complete industrial heating processes, including power sources, mechanical handling equipment and control systems based on the latest IT technology. EFD Induction has emerged as a pioneer in finding new induction heating applications and solutions.

› The solid-state Weldac welder from EFD

The Weldac G2 is the company’s family of high-output solid-state welders. It is available with output power of 150-2,000kW and with 100, 200 and 300kHz nominal frequencies. The Weldac uses rugged IGBT transistors, which due to EFD’s patented switching pattern, can now be used in high-frequency applications, such as tube welding. IGBT transistors are virtually short-circuit proof, making the Weldac very reliable and robust equipment that gives more uptime and output. Apart from capitalising on the strengths of standardised IGBT transistors across the entire frequency range, the Weldac G2 system also provides continuous electronic load matching. Continuous electronic load matching secures full power output across a wide range of tube sizes, ensuring maximum welding speeds for each size. The Weldac eliminates the need for costly compensation capacitors by using diode rectifiers that result in a high, constant power factor (0.95) at all power levels. Test- verified efficiency from input at the rectifier to output at the coil is 85-87 per cent. Cooling water consumption is low, with no need for expensive de-ionized water.

Website : www.elmaksan.net

EMS France

Stand B51

EMS, France, designs and builds special tube end-forming and cutting machines, which use techniques such as extrusion, expanding, reduction, pushing, and segment head/mandrel forming. These machines are based on the highest quality hydraulic and electrical components. The company’s cutting machines are used to recut bent tubes and to cut or recut hydroformed tubes. The company’s CT models cut without material tearing or chips, using a combination of two knives – one vertical to pre-cut the tube, and one horizontal

Website : www.ebner.cc

Website : www.efd-induction.com

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M ay /J une 2007