Welding machine; Machinery and apparatus for soldering, brazing or welding, whether or not capable of cutting, other than those of heading 85.15; gas-operated surface tempering machines and appliances (HS 8468); Energy and heat transfer engineering in general (ICS 27.010)
National Standard of the P.R.C., Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Welding Machines (10 page(s), in Chinese)
This standard specifies the energy efficiency grade, energy efficiency limit value and test method of arc welding machines and resistance welding machines. This standard is applicable to arc welders and resistance welders designed for industrial and professional purposes and not exceeding the voltage specified in GB/T 156. The resistance welding machines subject to this standard refers in particular to the resistance welding transformers which will finally be installed with the frame, the input circuit and the secondary circuit. This standard is not applicable to AC TIG arc welding machines, AC-DC dual-purpose TIG arc welding machines, power frequency secondary rectifier resistance welding machines, seam welding machines, resistance butt welding machines, flash butt welding machines, energy storage resistance welding machines, inverted AC resistance welding machines, and resistance welding transformers and mechanical equipment driven welding machines that are sold separately.