TPT May 2010

W elding T echnology

Due to customers’ differing capacity requirements, MFL has developed two machine concepts. The single head solution is designed for a capacity requirement of a maximum 13 tubes per hour. Both ends of the tube are processed by a 180° rotation of the machine. The double head solution is designed for a high capacity requirement Processing of large diameter pipes of up to 24 tubes per hour. The double machine, with two milling heads, processes both tube ends (one tube end per unit). Maschinenfabrik Liezen und Gießerei GmbH – Austria Fax: +43 7613 8883 30 Email: m.mayr@mfl.at Website: www.mfl.at MFL’s RFA 24/56 welding seam processing machine

FOLLOWING a number of enquiries from large pipe manufacturers, Maschinenfabrik Liezen und Gießerei GmbH (MFL), Austria, decided to develop the RFA 24/56 welding seam processing machine, for removing the welding seam of large diameter pipes by a fully automatic milling operation. The machine mills the inner and outer welding seam of large diameter pipes over a length of 400mm. This process offers a number of advantages compared to the manual grinding process. The largest advantage is that the milling process provides a better quality of welding seam – an important criterion for the delivery of large diameter tubes to Gazprom and other important customers. The complete process occurs automatically. Grinding pencils are not required, which prevents the operator from injury, and the milling process does not generate swarf or sparks. The chips are totally removed by an effective suction device. The welding seam is measured by a scanning device, and by a second scanning process the removed welding seam is recorded.

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M ay 2010

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