TPT March 2008

times per shift). A head cut-off machine was installed for cutting welded pipe up to 24", with uncoated and resharpenable carbide tipped circular saw blades used on the new machine. Previously, the maximum lifetime of 2.25m 2 per blade was achieved but only with a maximum 60 per cent of the resharpened blade. Problems were encountered when the wall thickness was between 15mm and 20mm, with lifetime only reaching 50 per cent. The company required more cuts of thick-wall pipes as well as increased saw blade lifetime. The blades were modified, including the number of teeth, tooth geometry, grade of carbide, and special coating. This resulted in a throw-away blade that guarantees stable working conditions. The average lifetime of the blades is now 10m 2 per piece, while the number of required new blades was reduced to 40 per cent. This cutting example included 20" x 15.5mm pipe dimension, 11m/min line speed, and a Lennartz saw blade of 300mm Ø x 44 Z (4 pieces in one operation). Linsinger manufactures sawing and milling machines for the tube and pipe industry. For large pipes, the company produces plate edge milling machines for welding edge preparation and pipe bevelling machines for pipe end bevelling on both ends simultaneously (up to tube Ø 60"). Linsinger products for ERW lines include strip edge milling machines for longitudinal seam tubes (HF-lines up to 24") and multi- cut tube cut-off machines for longitudinal edge tube lines (up to tube Ø 600mm). The company also produces strip edge milling machines for spiral steel tube lines (coil up to 2,000mm width, 1" sheet thickness). In addition, the company supplies carbide circular sawing lines for steel billets (up to Ø 630mm), single tubes (up to Ø 630mm), multiple tube layers (up to 1,250mm width) and seamless pipes. Also available are carbide circular sawing lines for steel billets (up to Ø 630mm) for forging mills. Linsinger GmbH Austria 8bC40 Website: www.lennartz.de

Lennartz GmbH & Co KG Germany 7aE17

Gebr Lennartz GmbH & Co KG is a manufacturer of high performance circular saw blades. These blades are used for the cutting of carbon steel, alloy steel and stainless steel materials, as well as non-ferrous metals. To further advance carbide technology, the company recently supplied a new project for a customer replacing a special milling machine with cutting inserts (changed three

› Linsinger’s KSA 1600 carbide circular saw

Linsinger produces the necessary carbide saw blades and miller only for Linsinger machines. In Europe, the company also offers a full re-sharpening and repair service.

Website : www.linsinger.com

Loeco GmbH & Co KG Germany 7.2C26

Loeco is involved in the engineering, manufacture and supply of industrial plants. The company places emphasis on environmental precautions and automation for high-speed production and protective zinc-coating of top-quality tube and pipe. Loeco’s state-of-the-art automatic pipe pickling and galvanising plant has started production at Tata Steel Tubes Division in Jamshedpur, India. Following modernisation of the first galvanising bath at Tata Steel, Loeco has now supplied a second galvanising bath, equipped with a double- dip and extracting system. Loeco has also integrated a new pickling line with automatic one-by-one transport of the pipes through degreasing, acid, flux and drying/preheating, to feed the two galvanising baths. Tata Steel’s new galvanising plant has been designed for round pipes from 1 / 2 " to 4", as well as square and rectangular profiles. The plant has a production capacity of 100,000t/year. Acid and zinc fume suction and cleaning are integrated in the plant, as well as a flux preparation. In recent years, Loeco has also modernised older pipe-galvanising plants by installing new handling systems on existing furnaces. The fully automatic system has pipe dipping screws, pipe positioning and lifting device, and comes with a pipe extracting machine for excess-zinc-blowing and water quenching/blowing.

Website : www.loeco.de

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M arch 2008

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