ISO 13579-2:2013规定了测量能量平衡和计算加热炉制造商设计的钢加热炉工艺效率的一般方法。该通用方法包括测量方法、计算（通用计算）以及能量平衡和效率计算评估报告。ISO 13579-2:2013不适用于钢加热炉之外与工艺本身有关的任何效率。

ISO 13579-2:2013 specifies a general methodology for measuring energy balance and calculating the efficiency of the process involving reheating furnaces for steel as designed by furnace manufacturers. This general methodology includes measurement methods, calculations (general calculation) and energy balance and efficiency calculation evaluation report. ISO 13579-2:2013 is not applicable to any efficiencies related to the process itself outside of reheating furnaces for steel.