Process Flow Continious type stainless steel pipe bright annealing furnace can heat the stainless steel welded pipeto 1050 C then cool it to the temperature lower than 100 C under the protection of hydrogen.The heating power supply of the intermediate ferquency induction is the newest DSP+IGBT structure.With DSP digital control system,there are self protection and self diagnostic functions.With small volume,it heats pipes rapidly and efficiently with energy-saving and low-waste features.The especially developed inducer designed according to the features of stainless steel can save 15%-20% energy in contrast of other products of the same class.Using hydrongen as of gas every minute. 1.Power system a.Medium frequency power that inverter by IGBT transistor b.Slot compensation power 2.Movable bright annealing section and cooling tunnel c.Induction heating section d.Heat preservation section e.Cooling water tunnel f.Gas protection device g.Infrared thermometer h.Gas pressure detector i.Circulating-outside water colling system 3.Electrical control system