Lincoln Electric f'Htl 1 ’ignpTON ■•ntuoiui IDjll.-nirt PIPE MILL INDUSTRY DRIVERS & TRENDS Higher steel grades and bigger wall thicknesses are needed for the pipeline market. Same is true for construction pipes welded with multi layers. Meanwhile, X80 is typical in most pipe mills while X100 and X120 are gaining momentum. Pipes are usually continuously tack welded with the buried arc process (GMAW) and afterwards submerged arc welded with one or multi layers on the inside and outside. Highest repeatability at lowest defect rate is essential to pipe production. Therefore, quality control is an important factor for this industry. Matching the material properties requires optimized flux and wire combinations as well as welding procedures matching the heat input. Details of quality requirements vary depending on the type of pipe (spiral or longitudinal) and the usage (water pipeline, construction pipe or gas/oil pipeline), but a quality higher than grade B of iso5817 is important to most applications. Lincoln solution With Uhrhan & schwill schweisstechnik GmbH, Lincoln electric offers the latest technology from the market leader in multiple arc welding. a Turnkey pipe welding solution, including tack welding and multi-arc submerged arc welding a customized welding equipment designed to meet the production flow and special needs of the customer a proven power source technology including power Wave® Ac/Dc 1000® sD sources with Waveform control Technology® a Hydrogen controlled flux and wire combinations with excellent slag removal and improved undercut or copper crack resistance a Fully automated process and machinery a Accessory equipment fully integrated into the welding machine a Traceability of each weld according to iso9001 a Welding experience in multiple arc welding since 1964 publication is-07 issue Date 07/12

To address the special needs of multiple arc welding, it is essential to have the ability to adjust all the mechanical setup parameters. It is also important to have the most advanced design standards for highest repeatability of serial production. The Uhrhan & Schwill welding head design meets these requirements and has been refined with more than 45 years of experience Lincoln Electric power sources include standard rectifiers (Idealarc® DC-1000) or transformers (Idealarc® AC-1500) and inverter technology (Power Wave® AC/DC 1000® SD) designed for high current capability at high duty cycles. With...