NARROW GROOVE WELDING (GTAW) The Advanced Choice for Automated Heavy Wall, Pipe, Vessel, and Valve Welding The NEW Magnetic Arc Oscillating Narrow Groove Welding technology is a significant advancement in narrow groove welding, and it builds on the mechanical oscillating narrow groove technology that was pioneered by AMI in the early 90's. This new Magnetic Oscillating technology allows users to weld in narrower grooves than ever before while achieving quality side wall fusion when welding and repairing heavy-walled components. Among the many advantages of Magnetic Arc Oscillating Narrow Groove welding are: ► Higher productivity rates ► Reduced weld volume (80%+ vs. conventional grooves) ► Lower heat input While traditional weld preps are 37.5 degree wide, Magnetic Arc Oscillating Narrow Groove welding uses a 0.31 "to 36" (8 to 9 mm) wide groove with 2 to 5 degree sidewalls which re- quires much less filler metal and results in higher quality welds due to efficient heat input and shorter weld times. AMI Magnetic Arc Oscillating Narrow Gap Torch (NGT-MAG) The Arc Machines NGT-MAG torch (Magnetic Arc Oscillating) is The Ultimate Solution for high quality heavy-wall pipe and vessel welding. • Reduced weld volume—► shorter welding time. • Lower heat input—► less residual stresses. • Less consumption of filling material and shielding gas. • Improved weldment properties. • Lower incidence of weld metal defects. Since its launch in 1994, AMI has supplied over 300 NGT Systems worldwide. www.arcmachines.com www.theglobalweldingcompany.com

MAGNETIC ARC OSCILLATING NGT TORCH METALLURGICAL BENEFITS OF THE AMI NGT PROCESS The Oscillating Arc of the AMI NGT-MAG torch improves the post-weld mechanical and metallurgical properties of the weldment by reducing the heat input, the residual stresses, and the grain structure in the HAZ (Heat Affected Zone). The reduced heat input is achieved by directing the arc towards the side wall of the joint and therefore achieving the desired side wall fusion with lower amperage levels. The arc oscillates between the sidewalls of the joint and the heat (current) is efficiently delivered to the sidewalls....

TECHNICAL CHARACTERISTICS OF THE AMI NGT-MAG TORCH Current Carrying Capacity = 350 Amp at 100% duty cycle. Suitable for welding up to 6” (152,5 mm) wall thicknesses. Torch thickness: 0.30” (7,6 mm) at the gas cup (on the first 2”; 50,8 mm ); 0.38” (9,65 mm) at the torch body. The torch can operate in steady state environment of up to 300 °F (150 °C) at 350 Amps continuous duty cycle. The torch body and electrode holder are water cooled. Torch can be pivoted around the electrode axis in order to align it with the weld groove. Tungsten diameter = 1/8” (3,2 mm); straight. Cold wire welding wire...

The Global Welding Company For further information please visit our website or contact us at 1-818-896-9556 Dynamic. Growing. Integrated. EUROPEAN BRANCH OFFICE Arc Machines, Inc. GERMAN OFFICE Arc Machines GmbH UK OFFICE Arc Machines UK Limited Unit 2 Lamport Court Heartlands Business Park Daventry, NN11 8UF, UK Tel: +44 / 1327 / 312787 Fax: +44 / 1327 / 315034 [email protected] Subject to change