YS/T 121.7-1992 Resistance heat balance test and calculation method for heaters in non-ferrous metal processing enterprises

YS/T 121.2-1992 Resistance fusion furnace thermal balance test and calculation method for non-ferrous metal processing enterprises YS/T 121.3-1992 The testing and calculation methods for thermal balance of induction furnaces used by non-ferrous metal processing enterprises YS/T 121.4-1992 The testing and calculation methods for thermal balance of flame heating furnaces and annealing furnaces in non-ferrous metal processing enterprises YS/T 121.5-1992 The testing and calculation methods for thermal balance of induction furnaces used by non-ferrous metal processing enterprises for casting ingots YS/T 121.6-1992 The method for testing and calculating the thermal balance of forward-propelled air circulation resistance heating furnaces in non-ferrous metal processing enterprises YS/T 121.8-1992 The method for calculating and testing the thermal balance of resistive heat treatment for non-ferrous metal processing enterprises YS/T 121.9-1992 The testing and calculation method for the thermal balance of vacuum arc furnaces in non-ferrous metal processing enterprises YS/T 121.10-1992 The testing and calculation methods for thermal balance of cemented carbide resistance heating furnaces in non-ferrous metal processing enterprises