ESAB Welding & Cutting Products (www.esabna.com) designed its new LHF 405 Pipemaster rectifier for heavyduty manual metal arc welding with coated electrodes, basic GTAW welding and air-arc gouging. The company says the rectifier provides a consistently stable arc across a wide range of currents and voltages and is configured to meet the requirements of welding with E-6010 cellulosic electrodes.